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Tektronix CTS 710 Service Manual

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Service Manual

CTS 710 SONET Test Set &

CTS 750 SDH Test Set

070-8853-02

Warning

The servicing instructions are for use by qualified

personnel only. To avoid personal injury, do not

perform any servicing unless you are qualified to

do so. Refer to the Safety Summary prior to

performing service.

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Summary of Contents for Tektronix CTS 710

Page 1 Service Manual CTS 710 SONET Test Set & CTS 750 SDH Test Set 070-8853-02 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to the Safety Summary prior to...
Page 2 Copyright E Tektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and are protected by United States copyright laws and international treaty provisions. Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the...
Page 3 WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
Page 5 1–2 CTS 710 Specification Tables ........
Page 6 Contents Maintenance Preparation ............6–1 Inspection and Cleaning .
Page 7 Contents Options Options ........... 7–1 Electrical Parts List Electrical Parts List...
Page 8 Contents List of Figures Figure 2–1: Controls Located Around the Display ....2–5 Figure 2–2: Front-Panel Controls and Indicators ....2–6 Figure 2–3: Rear-Panel Controls and Connections .
Page 9 ....... . . 6–17 Figure 6–5: CTS 710 Cables and Cable Routing ....
Page 10 Contents Figure 6–11: Knob Removal ........6–25 Figure 6–12: Line Fuse and Line Cord Removal .
Page 11 ........10–13 Figure 10–5: CTS 710 Cables ....... . .
Page 12 ......4–4 Table 4–3: CTS 710 (SONET) Test Record .....
Page 13 Contents Table 6–1: External Inspection Check List ..... 6–4 Table 6–2: Internal Inspection Check List ..... . 6–6 Table 6–3: Tools Required for Module Removal .
Page 14 Contents CTS 700-Series Service Manual...
Page 15 General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. Only qualified personnel should perform service procedures. Injury Precautions Use Proper Power Cord To avoid fire hazard, use only the power cord specified for this product. Avoid Electric Overload To avoid electric shock or fire hazard, do not apply a voltage to a terminal that is outside the range specified for that terminal.
Page 16 General Safety Summary Provide Proper Ventilation To prevent product overheating, provide proper ventilation. Do Not Operate With If you suspect there is damage to this product, have it inspected by qualified Suspected Failures service personnel. Safety Terms and Symbols Terms in This Manual These terms may appear in this manual: WARNING.
Page 17 General Safety Summary Certifications and Compliances CSA Certified Power CSA Certification includes the products and power cords appropriate for use in Cords the North America power network. All other power cords supplied are approved for the country of use. xiii CTS 700-Series Service Manual...
Page 18 General Safety Summary CTS 700-Series Service Manual...
Page 19 Service Safety Summary Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present.
Page 20 Service Safety Summary CTS 700-Series Service Manual...
Page 21 This manual explains how to verify, service, troubleshoot, and repair the CTS 700-Series Test Set (CTS) to the module level. Information in this manual applies equally to the CTS 710 SONET Test Set and the CTS 750 SDH Test Set unless otherwise specified.
Page 22 Preface Conventions The following conventions apply throughout this manual: H Each test procedure begins with a table, similar to the one below, that provides information you need to know before starting the test. Equipment Communications Signal Analyzer (item 4) Required 75 W coaxial cable (item 19) Delay line (item 24), three required Prerequisites...
Page 23 Related Manuals These other manuals are available for the CTS 700-Series Test Set: H The CTS 710 SONET Test Set User Manual and CTS 750 SDH Test Set User Manual (part numbers 070-8852-XX and 070-8921-XX, respectively) provide a tutorial and detailed operating instructions.
Page 24 Preface CTS 700-Series Service Manual...
Page 25 Warranty Repair Service Tektronix technicians provide warranty service at most Tektronix service locations worldwide. (The warranty appears after the title page and copyright page in this manual.) Your Tektronix product catalog lists all service locations worldwide. Repair Service The following services can be purchased to tailor repair of your CTS 700-Series Test Set to fit your requirements.
Page 26 Introduction Self Service Tektronix supports repair to the module level by offering a Module Exchange program. Module Exchange. This service reduces down time for repair by allowing you to exchange most modules for remanufactured ones. Tektronix ships you an updated and tested exchange module from the Beaverton, Oregon service center.
Page 28 The CTS test sets feature the following capabilities (options are required for some features): H STS-1, STS-3, OC-1, OC-3, and OC-12 transmit and receive (CTS 710) H STM-1 and STM-4 transmit and receive (CTS 750)
Page 29 H Overhead testing Guide to the Specifications The following sections contain the complete specifications for the CTS 700-Series Test Sets. The first section contains the CTS 710 specifications. The next section, beginning on page 1–17, covers the specifications for the CTS 750.
Page 30 Specifications CTS 710 Specification Tables The CTS 710 SONET Test Set specifications, as referenced to the ANSI and Bellcore SONET standards, are arranged by functional groups in Tables 1–1 through 1–5. Table 1–1: Standard CTS 710 Specifications Characteristic Description Generator Output...
Page 31 Specifications Table 1–1: Standard CTS 710 Specifications (Cont.) Characteristic Description Signal Structure n Standards Compliance Meets the requirements of ANSI T1.105A, Section 8 and Bellcore GR-NWT-000253 Payload Channel (SPE) One active STS-1 in STS-3 Selection (The other 2 channels are unequipped)
Page 32 Specifications Table 1–1: Standard CTS 710 Specifications (Cont.) Characteristic Description n Signal Sensitivity STS-1 Hi: 0.5 Vpk min to 1.2 Vpk max STSX-1: 0.25 Vpk min to 0.6 Vpk max STS-1 Lo: 0.125 Vpk min to 0.35 Vpk max STS-1 Monitor: 20 dB of flat loss below Xcon STS-3: 0.35 Vpk min to 0.6 Vpk max...
Page 33 Specifications Table 1–1: Standard CTS 710 Specifications (Cont.) Characteristic Description Path Overhead Access Set Path Overhead bytes to any value from binary 00000000 to 11111111: C2, F2, Z3, Z4, and Z5 View all Path Overhead bytes Add/Drop Insert data from the Overhead Add/Drop connector into the F2 user byte.
Page 34 Specifications Table 1–1: Standard CTS 710 Specifications (Cont.) Characteristic Description Measurements Error Count, Error Rate, and B1, B2, B3, Payload, Line-FEBE, Path-FEBE Errored Seconds for Alarm and Failure Seconds LOS, OOF, LOF, SPE LOP, Line AIS & FERF, Path AIS & FERF, Loss of Power,...
Page 35 Specifications Table 1–1: Standard CTS 710 Specifications (Cont.) Characteristic Description Utilities TroubleScan Scans all measurement results for key violations. AutoScan AutoScan to incoming signal (rate, mapping, framing, and pattern). Identifies incoming signal and presents graphical display of SPE and VT structure.
Page 36 Specifications Table 1–2: Option 22 DS1/DS3/VT1.5 Capabilities Characteristic Description DS1/DS3 Generator Electrical Output Data Rates DS1 (1.544 Mb/s) DS3 (44.736 Mb/s) Formats DS1: AMI, B8ZS coded DS3: B3ZS coded n Signal Level 0.6 V into 100 W DS1: 0.24 V into 75 W DS3: 0.6 V n Pulse Shape...
Page 37 Specifications Table 1–2: Option 22 DS1/DS3/VT1.5 Capabilities (Cont.) Characteristic Description VT1.5 Active Map Channel Selection Allows selection of any one of 28 VT channels Remaining 27 VT channels are background VT1.5 Background Channels Background Channel Content When internal DS1 generator is used: QRSS or Idle pattern (11010101) When external source is used: QRSS Background Channel Framing When internal DS1 generator is used: Same as active channel...
Page 38 Specifications Table 1–2: Option 22 DS1/DS3/VT1.5 Capabilities (Cont.) Characteristic Description DS1/DS3 Receiver Electrical Input Data Rates DS1: (1.544 MHz) 150 ppm DS3: (44.736 MHz) 150 ppm Formats DS1: AMI, B8ZS DS3: B3ZS 100 W balanced Impedance DS1: DS1 Bridged: 1 kW balanced 75 W to ground, unbalanced DS3: n Signal Level...
Page 39 Specifications Table 1–2: Option 22 DS1/DS3/VT1.5 Capabilities (Cont.) Characteristic Description VT1.5 Path Trace Byte J2 Send user-defined 16-byte sequence, or set to 00000000 View Path Trace J2 VT Pointer Movement VT1.5 Pointer Interaction VT1.5 or STS, but not both at the same time Single Single pointer justification (increment or decrement) Burst...
Page 40 Specifications Table 1–2: Option 22 DS1/DS3/VT1.5 Capabilities (Cont.) Characteristic Description DS1 Alarm and Failure Seconds for Yellow Loss of Pattern Sync Loss of Frame Loss of Signal DS3 Alarm and Failure Seconds for AIS (DS3 Blue) Yellow (DS3 FERF) Idle Loss of Pattern Sync Loss of Frame Loss of Signal...
Page 41 Specifications Table 1–2: Option 22 DS1/DS3/VT1.5 Capabilities (Cont.) Characteristic Description Histograms for DS1, DS3 and VT1.5 DS1/DS3/VT1.5 Error Count, Bit CRC, Frame, Parity, Error Rate and Errored Seconds VT-BIT2, VT-FEBE, Pattern Bit DS1/DS3/VT1.5 Alarms & Fail- LOS, LOF, AIS, Yellow (FERF), ures On/Off VT-LOP, VT-AIS, VT-FERF, VT-LOM, Pattern Loss, Loss of Power...
Page 42 Specifications Table 1–4: Physical Characteristics Characteristic Description Dimensions Height: 165 mm (6.5 in) 191 mm (7.5 in) with accessory pouch Width: 362 mm (14.25 in) Depth: 490 mm (19.25 in) with front cover 564 mm (22.2 in) with handle extended Weight Net: Approximately 8.7 kg (19.3 lb)
Page 43 Specifications Table 1–5: Certifications and compliances (Cont.) Characteristic Description Conditions for Safety Certification Operating temperature: +5 to +40 C Relative Humidity: 80% up to 31 C ,decreasing linearly to 50% at 40 C (maximum operating) Max. Operating altitude: 2000 m Equipment Type: Test and measuring Safety Class:...
Page 44 Specifications CTS 750 Specification Tables The CTS 750 SDH Test Set specifications, as referenced to the ITU-T SDH standards, are arranged by functional groups in Tables 1–6 through 1–10. Table 1–6: Standard CTS 750 Specifications Characteristic Description Generator Output Electrical Output Data Rates STM-0: 51.84 Mb/s...
Page 45 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Signal Structure Standards Compliance Meets the requirements of ITU-T707, 708, 709 Payload Channel (AU) One active STM-1 in STM-4 (the other 3 channels are unequipped) One active STM-0 in STM-1 selection (the other 2 channels are unequipped) One active STM-0 in STM-4 (the other 11 channels are unequipped) Unequipped Payload C2 byte is set to 00...
Page 46 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Jitter Generator (requires Option 14) Jittered Line Output Sinusoidal modulation of transmit clock frequency, applicable to any SDH or PDH data rate. Changes to jitter amplitude or frequency are phase continuous. Modulation Range Modulation is selectable up to the following limits, which depend on the rate: Jitter/Wander Amplitude...
Page 47 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Jitter Clock Input Input to measure jitter on a clock signal. Nominal Data Rates Any supported SDH or PDH rate. Rate is independent of the receive line rate. Frequency Tolerance Nominal rate 100 ppm Data Format Sensitivity, typical...
Page 48 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Optical Input Data Rates STM-0: 51.84 Mb/s ( 100 ppm) STM-1: 155.52 Mb/s ( 100 ppm) STM-4: 622.08 Mb/s ( 100 ppm) Data Format Scrambled NRZ Maximum Input Power –7 dBm (Opt. 05 and 06 include a 10 dB attenuator) Operating Wavelength 1310 nm and 1550 nm (1100 nm to 1570 nm operating range) n Signal Sensitivity...
Page 49 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Set to Value Set to a new location with or without the NDF being set. Range is 0 to 1023 (783 – 1023 are illegal locations). AU Pointer sequences available G.783(a) Single Alternating G.783(b) Regular + Double G.783(c) Regular + Missing...
Page 50 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description G.821 Analysis Pattern Bit Error-Count, ES, SES, UAS, EFS, DM Seconds and % of total time Section B1 Error Blocks, ES, SES, UAS Seconds and ratio Background Block Errors RS B1 Error Blocks, ES, SES, UAS Seconds and ratio Background Block Errors...
Page 51 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Fullband Filter (–3 dB) 2 Mb/s: 10 Hz to 100 kHz 34 Mb/s: 10 Hz to 800 kHz 140 Mb/s: 10 Hz to 3.5 MHz STM-0E: 10 Hz to 400 kHz STM-1E: 10 Hz to 1.3 MHz...
Page 52 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Extended Jitter Measurement Resolution: 0.01 UI Resolution and Range Range: see graph Jitter/Wander Amplitude Jitter/Wander Frequency Amplitude Scale in UI All rates 0.5 * amplitude is 0.3 UI for 2 Mb/s rate with PRBS pattern, and for 622 Mb/s rate with any pattern.
Page 53 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Intrinsic Noise with Jitterless For peak-to-peak measurement, in UI PRBS Data Signal, typical Highband Wideband Fullband Fullband (10 Hz) (1 Hz) 2 Mb/s rate 0.035 0.035 34 Mb/s rate 0.035 0.035 140 Mb/s rate 0.035...
Page 54 Specifications Table 1–6: Standard CTS 750 Specifications Characteristic Description LEDs Status Indicators LOS, LOF, LOP, MS AIS, MS FERF, Path AIS, Path FERF, Errors, Pointer Adjust, Signal Present, Pattern Lock Histograms Error Count, B1, B2, B3, MS-FEBE, Path-FEBE, Bit Error Rate and Pattern Bit Errored Seconds Alarms &...
Page 55 Specifications Table 1–6: Standard CTS 750 Specifications (Cont.) Characteristic Description Printer Optional printer in pouch (thermal): HC 411 Printer support: Epson, HP Thinkjet Serial Printer Port: RS-232 Print to disk: BMP format, Interleaf format, and Encapsulated PostScript Computer Interface IEEE-488.2 interface RS-232-C interface (DB9) Help Mode Online task-oriented help...
Page 56 Specifications Table 1–7: Option 36 2 Mb/s, 34 Mb/s, 140 Mb/s, TU12, TU3 Capabilities (Cont.) Characteristic Description 2 Mb/s, 34 Mb/s, 140 Mb/s Internal Pattern Generator Framing 2 Mb/s: 34 Mb/s and 140 Mb/s: PCM30 (CAS) Framed PCM31 Unframed PCM30 CRC (CAS) PCM31 CRD Unframed Patterns...
Page 57 Specifications Table 1–7: Option 36 2 Mb/s, 34 Mb/s, 140 Mb/s, TU12, TU3 Capabilities (Cont.) Characteristic Description Transmitter Clock Internal Clock Accuracy 4.6 ppm, for instrument calibrated within 24 months External Clock Reference n Rates 2.048 Mb/s 40 ppm 2.048 MHz 50 ppm Unbalanced, 75 W BNC connector Input Recovered Clock...
Page 58 Specifications Table 1–7: Option 36 2 Mb/s, 34 Mb/s, 140 Mb/s, TU12, TU3 Capabilities (Cont.) Characteristic Description 2 Mb/s, 140 Mb/s Receiver Electrical Input Data Rates 2 Mb/s (2.048 Mb/s) 150 ppm 34 Mb/s (34.368 Mb/s) 150 ppm 140 Mb/s (139.264 Mb/s) 150 ppm Formats 2 Mb/s:...
Page 59 Specifications Table 1–7: Option 36 2 Mb/s, 34 Mb/s, 140 Mb/s, TU12, TU3 Capabilities (Cont.) Characteristic Description 140 Mb/s Active Demap Channel Selected STM-1 VC4 from TU Path Overhead TU12 Path Overhead Access V5 control (–––xxxx–) Set Path Overhead bytes to any value from binary 00000000 to 11111111: Z3, Z4, and Z5 View all TU Path Overhead bytes TU3 Path Overhead Access Set Path Overhead bytes to any value from binary 00000000 to 11111111:...
Page 60 Specifications Table 1–7: Option 36 2 Mb/s, 34 Mb/s, 140 Mb/s, TU12, TU3 Capabilities (Cont.) Characteristic Description Initialization Period On or Off Thirty second burst of 1 pointer per second in the same direction as the selected test Cool Down Period On or Off This will last at least 60 seconds PDH &...
Page 61 Specifications Table 1–7: Option 36 2 Mb/s, 34 Mb/s, 140 Mb/s, TU12, TU3 Capabilities (Cont.) Characteristic Description G.821 Analysis for PDH PDH Frame & CRC-4 Errors, Error-Count, ES, SES, UAS, EFS, DM Seconds, and % of total time Payload (Pattern Bit Errors), Error-Count, ES, SES, UAS, EFS, DM Seconds and % of total time M.2100 Analysis for PDH...
Page 62 Specifications Table 1–8: Environmental Specifications Characteristic Description Temperature Operating: 0_ C to +40_ C Nonoperating: –40_ C to +75_ C Altitude Operating: 4,572 m (15,000 ft) Nonoperating: 12,192 m (40,000 ft) Humidity Operating: To 95%, relative humidity at or below +40_ C for 2 hours or less To 90% relative humidity at or below 30_ C, continuous Transportation Handling Qualifies under National Safe Transit Association 1s Pre-shipment Test;...
Page 63 Specifications Table 1–10: Certifications and compliances Characteristic Description EC Declaration of Conformity – EMC Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: EN 55011 Class A Radiated and Conducted Emissions EN 50082-1 Immunity: IEC 801-2...
Page 64 Specifications Table 1–10: Certifications and compliances (Cont.) Characteristic Description Installation Category Descriptions Terminals on this product may have different installation category designations. The installation categories are: CAT III Distribution-level mains (usually permanently connected). Equipment at this level is typically in a fixed industrial location CAT II Local-level mains (wall sockets).
Page 65 Specifications 1–38 CTS 700-Series Service Manual...
Page 67 Installation This section provides important information about installing the CTS 700-Series Test Set. Supplying Operating Power WARNING. Read all information and heed all warnings in this subsection before connecting the CTS to a power source. AC POWER SOURCE AND CONNECTION. The CTS operates from a single- phase power source.
Page 68 Installation Power Cord Information A power cord with appropriate plug configuration is supplied with each CTS. Table 2–1 gives the color-coding of the conductors in the power cord. If you require a power cord other than the one supplied, refer to Table 2–2, Power Cord Options.
Page 69 Installation Table 2–2: Power Cord Options (Cont.) Plug Configuration Normal Usage Option Number Part Number North America 161-0066-12 230 V Switzerland 161-0154-00 230 V Operating Voltage The Specification section lists line voltage ranges and their associated line frequency ranges over which the CTS operates. See the Power Requirements specification on page 1–15 for these ranges.
Page 70 The CTS may be equipped with one or more instrument options. These options are listed in the Options section. For further information and prices of CTS options and accessories, see your Tektronix Products catalog or contact your Tektronix Field Office.
Page 71 This section provides an overview of CTS operation, but covers only the features needed to service or verify performance of the CTS. For more details about CTS operation, refer to the CTS 710 SONET Test Set User Manual or CTS 750 SDH Test Set User Manual.
Page 72 Connectors Connector Figure 2–2: Front-Panel Controls and Indicators (CTS 710 with Option 22 Shown) In addition to controls and indicators, the front panel contains input and output connectors for the communication signals and a disk drive for setup, test, and results storage.
Page 73 (Option 22 Input (CTS 750) and 36) (CTS 710) Figure 2–3: Rear-Panel Controls and Connections (CST 750 with Option 14 shown) Front-Panel Status Lights The status lights indicate the condition of the received signal (see Figure 2–4). There are three types of front-panel status lights: H Green status lights.
Page 74 Figure 2–4: Status Lights (CTS 710 with Option 22 Shown) Using the Menu System The CTS is controlled primarily by its menu system. Though several controls are located on the front panel, such as INSERT ERROR and PRINT, most functions are controlled from one of the five menus.
Page 75 Operating Information Menu Maps The following menu maps show the menus, menu pages, parameters, and choices needed to service or verify performance of the CTS. For simplicity, many menu items not needed for service have been omitted from these diagrams. Menu Buttons Menu Pages Parameters...
Page 76 Operating Information Menu Buttons Menu Pages Parameters Choices CHOICES Receive Rate Cross Connect RECEIVE SETTINGS Receive Level Mapping No Mapping VT 1.5 Async or TU-12 Async* Ext Drop Payload Unframed Errors Alarms & Failures MAIN RESULTS Pointers Self Test Control SELF TEST Self Test Group...
Page 78 Theory of Operation This section describes the electrical operation of the CTS 700-Series Test Set. The description is based on the block diagram located in the Diagrams section of this manual, and gives an overall view of the module design. This description, together with the troubleshooting and diagnostics information in the Mainte- nance section, enable a qualified technician with the appropriate test equipment to isolate a problem to the faulty module.
Page 79 Theory of Operation A03 CPU The A03 CPU coordinates all CTS activities (including the activities of the Front Panel Processor). The CPU is a 16 MHz 68020 which is interfaced to a PC-AT bus for communications with peripherals. The CPU also supports the I C bus for serial communications to peripherals.
Page 80 Theory of Operation PLUG-IN INTERFACE MODULE Optical Power Received To Protocol 155 Mb/s (Electrical) Rx Level Signal Processor Level 52 Mb/s (Electrical) Rx Level A/D Converter Front Panel Connectors Receiver 52/155/622 Mb/s Rate Select 155/622 Mb/s Optical-to- (Optical) (Optical) Electrical 155.52 MHz Converter To Protocol...
Page 81 Theory of Operation Receive (Rx). The Receive block contains the 52 Mb/s and 155 Mb/s receivers. This block also contains circuitry for detection of Active Signal Present. The 52 Mb/s receiver performs amplification, equalization, clock recovery, data retiming, and B3ZS decoding. Note that equalization of frequency loss from the transmission cable is not automatic;...
Page 82 Theory of Operation Transmit Line Build Out (LBO). The Line Build Out (LBO) feature allows the transmitter output to be degraded to approximate the defined signal at the cross-connect point (STSX-n). When LBO is not enabled, the transmitter output is unfiltered (STS-n), but will meet the Bellcore 253 specifications at the downstream cross-connect point.
Page 83 Theory of Operation NOTE. The ON/STBY switch is not read by the Front Panel Processor. The signal passes through the A06 Front Panel board, is processed by the A03 CPU board, and is passed through the A02 Backplane board to the low voltage power supply. Communication.
Page 84 Theory of Operation the signal rate. A 52 Mb clock signal is recovered on the Plug-In Interface Module; all other rates are recovered on the A10 High Speed Protocol board. External BITS Reference or External 2 Mb/s Reference. Input is through a rear-panel jack.
Page 85 Theory of Operation Table 3–1: A09 Main Protocol Hardware Function Assignments Board A09 Main Protocol Board Elements Description POH content, alarms and pointer movements, internally generated payloads POH acquisition and alarm status, pointer movement counters, and SPE PRBS error counters Hardware Timer, controls error and pointer insertion rates DCC Control Data communications channel control (section DCC and line...
Page 86 Í Í Í Í Í STTX SETI Structure Setup: Í Í Í Í Data Í Í Í Í Í (CTS 710 Rate PIN<7..0> only) Í Í Í Í Í Í Í Í Í Í Í Í Í Setup: 52 Mb/s STS–1...
Page 87 Theory of Operation A25 Low Voltage Power The low voltage power supply provides the +5.1 V, +15 V, –6.4 V, and –15 V Supply supply voltages to the CTS. The low voltage power supply is a switching power converter. It supplies power to all instrument circuitry.
Page 88 Theory of Operation Figure 3–3 is a block diagram of the DS1/3 Add/Drop/Test Option. Drop External DS1 Port DS1/DS3 Line Drop External Interface DS3 Port TxComBus Configuration Protocol DS1/DS3 RxComBus Switch Board Map/Demap DS1/DS3 Test Set AT Bus Interface Figure 3–3: DS1/DS3 Add/Drop/Test Block Diagram There are three independent blocks that handle the DS1 or DS3 data.
Page 89 Theory of Operation A13 Tributary Board Option 36 includes the circuitry discussed here and the circuitry discussed in (Option 36) A11/A13 Tributary Board (Option 22 and Option 36) on page 3–10. The E4 circuitry is located on the daughter board portion of option 36. The E1/E3 part of option 36 is located on the mother board.
Page 90 Theory of Operation External Clock Interface 278.528 MHz External Clock Input Offset 1 Offset 2 E4 Out E4 In E4 Out STM–1 SDH E4 Serial E4 In to/from Protocol to/from User Mapper/Demapper Line Interface Board 139.264 MB {TUA, TUD} {SETI, SERI} Test Set {TUT} AT Bus...
Page 91 Theory of Operation Test Set. Basically the Test Set generates a framed or unframed E4 pattern and supplies the required errors and alarms. This signal can go to either the Tx Line Interface or the Mapper. The Test Set also receives an E4 source from either the Rx Line Interface or the demapped signal and checks for a framed or unframed pattern (as set by software) and any errors or alarms.
Page 92 Theory of Operation DDS1/VCO/PLL. The DDS1/VCO block is an oscillator that sets the nominal clock frequency for the JAWG. Clock timing is based on direct digital synthesis (DDS) at a nominal 4.86 MHz, which is then multiplied up to the clock frequency by the voltage controlled oscillator VCO in phase-locked loop.
Page 93 Theory of Operation A12 JAWA Board The JAWA (jitter and wander analyzer) board measures peak-to-peak or RMS (Option 14) jitter from the received signal or from a rear-panel input. Figure 3–6 shows a block diagram of the JAWA circuitry. Phase-locked loop MUX/ DIV1 clock recovery...
Page 94 Theory of Operation Peak–to-Peak or RMS Measurement. The digital output from the DSP function contains the data necessary to calculate peak-to-peak or RMS jitter and wander in the input signal. This data is passed to the CPU to make that calculation. 3–17 CTS 700-Series Service Manual...
Page 95 Theory of Operation 3–18 CTS 700-Series Service Manual...
Page 97 Performance Verification The performance verification procedures in this section verify the CTS 710 SONET Test Set and the CTS 750 SDH Test Set. You may only need to perform a few of these procedures, depending on what you want to accomplish. Refer to Table 4–1 to determine which procedures you need to do.
Page 98 Performance Verification General Information and Conventions Please read the following general information and conventions, which apply throughout this section: H Each test procedure begins with a table, similar to the one below, that provides information you need to know before starting the test. Equipment Communications signal analyzer (item 4) Required...
Page 99 Performance Verification Choice Knob to Highlight Selection Parameters Buttons Menu Page Menu Buttons Buttons Figure 4–1: Location of Front-Panel Controls H Most procedures mention both SONET and SDH terminology in their instructions to set the CTS controls. Please use the terminology that is appropriate to your application and disregard the other.
Page 100 OC-3, and OC-12, or SDH masks Head for STM-1 and STM-4 2 Mb/s Signal Source Provides 2 Mb/s signal Tektronix CTS 750 Test Set Checking 2 Mb/s Reference (in addition to the CTS-under- Input and Add/Drop/Test test) Compatible with 62.5 mm...
Page 101 Item Number and Description Minimum Requirements Example Purpose SDH Reference Receiver Calibrated frequency response for Tektronix ORS622, Option 41 Check transmit signal power and Power Meter STM-1 and STM-4; and shape 0 dBm to –80 dBm dynamic range; 5% accuracy for...
Page 102 Table 4–2: Required Test Equipment (Cont.) Item Number and Description Minimum Requirements Example Purpose 50 W impedance; BNC female Adapter, BNC Female-to- Tektronix part number Interconnect electrical signals BNC Female connectors 103-0028-00 (two required) 50 W impedance Adapter, Type N...
Page 103 This equipment is required to test a CTS 750 with Option 36 only. It is not required to test a CTS 750 without Option 36 or a CTS 710. This equipment is required to test a CTS 710 with Option 22 only. It is not required to test a CTS 710 without Option 22 or a CTS 750.
Page 104 Performance Verification Test Record Photocopy either Table 4–3 (for CTS 710) or Table 4–4 (for CTS 750), found on the next pages, and use it to record the performance verification results for your instrument. Table 4–3: CTS 710 (SONET) Test Record...
Page 105 Performance Verification Receive Input Checks Passed Failed Electrical Input Sensitivity STS-1 High (part 1) STS-1 High (part 2) STSX-1 STS-1 Low STS-1 Monitor STS-3 High (part 1) STS-3 High (part 2) STSX-3 STS-3 Low STS-3 Monitor Optical Input Sensitivity OC-1 OC-3 OC-12 Transmit Clock Checks...
Page 106 Performance Verification Table 4–4: CTS 750 (SDH) Test Record CTS 750 Serial Number: Temperature and Relative Humidity: Plug-In Interface Module Type: Verification Performed by: Plug-In Interface Module Serial Number: Date of Verification: CTS 750 Functional Tests Test Passed Failed System Self Test with External Loop-Back Generated Failures None Pointer Movements...
Page 107 Performance Verification Tributary Checks (Option 36 only) Passed Failed 2 Mb/s Balanced Pulse Mask 2 Mb/s Balanced Monitor Receive Level 2 Mb/s Balanced Bridged Receive Level 2 Mb/s Balanced External Clock Input 2 Mb/s Balanced Cable Equalization Passed Failed 2 Mb/s Unbalanced Pulse Mask 2 Mb/s Unbalanced Bridged Receive Level 2 Mb/s Unbalanced Monitor Receive Level 2 Mb/s Unbalanced External Clock Input...
Page 108 Performance Verification Low-Frequency Jitter Tests (Option 14 only) Jitter Measurement Tests Jitter Frequency Jitter Amplitude Transmit Rate Minimum Measured Value Maximum 15 Hz 200 UI Amplitude 2 Mb/s 189.25 UI 209.87 UI (Unbalanced) 34 Mb/s 189.35 UI 209.77 UI 140 Mb/s 189.35 UI 209.77 UI STM-0E...
Page 109 Performance Verification Transmit/ Jitter Measured Measured Clock Rate Frequency Value Value Minimum Maximum Minimum Maximum STM-0E 2.5 kHz 1.64 UI 1.88 UI 1.630 UI 1.885 UI STM-0E 5 kHz 1.64 UI 1.88 UI 1.630 UI 1.890 UI STM-0E 10 kHz 8.28 UI 9.22 UI 8.270 UI...
Page 110 Performance Verification Self Test This procedure uses internal routines to verify that the CTS 710 SONET Test Set or the CTS 750 SDH Test Set passes its internal self tests. Equipment No test equipment or connections are required Required Prerequisites...
Page 111 The purpose of functional tests is to verify the functional specifications of the CTS. Most functional tests rely on the front panel status lights to indicate the results of the test. Figure 4–2 shows the status lights for a CTS 710 with Option 22.
Page 112 Performance Verification You may perform the functional tests in any order. Each test is independent and does not depend on the setup from the previous test. System Self Test with This test runs the self test including coverage of the transmitter and receiver I/O External Loop-Back circuitry and, if installed, Option 22 or Option 36.
Page 113 Performance Verification Generated Failures This test checks that the CTS detects the LOS failure correctly. 75 W BNC coaxial cable (item 19) for electrical loop-back Equipment Required Prerequisites CTS warmed-up at least twenty minutes Time Required Approximately two minutes 1. Attach the 75 W coaxial cable (electrical) from the TRANSMIT output to the RECEIVE input.
Page 114 Performance Verification Pointer Movement This test checks that the CTS generates and measures pointer movement correctly. 75 W BNC coaxial cable (item 19) for electrical loop-back Equipment Required Prerequisites CTS warmed-up at least twenty minutes Time Required Approximately four minutes 1.
Page 115 Performance Verification 8. Wait 100 seconds for the test to complete. When the START/STOP light turns off, verify that the Positive Justification and Negative Justification counts meet both of the following conditions: 24000 Positive Justifications 26000 Negative Justifications = Positive Justifications 9.
Page 116 Performance Verification Physical Layer Tests This section contains a set of procedures that verify the CTS 710 SONET Test Set or the CTS 750 SDH Test Set meets its physical layer specifications. These procedures check performance of the standard instrument as well as two optional Plug-In Interface Modules, so some steps may not apply to your CTS.
Page 117 Performance Verification 1. Connect the CTS TRANSMIT output to the communications signal analyzer input as shown in Figure 4–3. Communications Signal Analyzer CTS Test Set SD-22 Input TRANSMIT 75 W Coaxial Cable SMA Male-to- BNC Female Adapter Figure 4–3: Transmit Electrical Output Amplitude Hookup 2.
Page 118 Performance Verification Select the WAVEFORM menu, select the Horizontal Desc pop-up menu, and set Main Record Length to 5120 pts. g. Set the Vertical Size to 100 mV/div. h. Set the Horizontal Size to 1 ms/div. NOTE. For increased accuracy, you may perform a LOOP Gain adjustment of the SD22 head on the communications signal analyzer.
Page 119 Performance Verification Communications Signal Analyzer CTS Test Set SD-22 Input Transmit External Direct Output Trigger Input 50 W SMA Coaxial Cable (Connectors Already on the (Connector Delay Cables) Already on the Delay Cables) Delay Lines, 5 ns Each 50 W SMA Coaxial Cable 50 W Power 75 W female BNC to 50 W male BNC...
Page 120 Performance Verification 4. If you are verifying a CTS 750, skip to step 6. To set up the CTS to output a STS-1 cross connect level, set up the CTS 710 with the following sequence: Press Menu Button Select Menu Page...
Page 121 Performance Verification 6. To set up the CTS to output a STS-3 or STM-1 high level, do the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TRANSMIT TRANSMIT Transmit Rate...
Page 122 Performance Verification Check Electrical Output This test checks the high- and cross-connect-level signal pulse shapes. The Pulse Shape at Transmit signals are equalized through appropriate lengths of reference cable for compari- son with eye masks specified in ANSI T1.102, Bellcore TR-NWT-000253, and Output (High Level) and at ITU G.703.
Page 123 Performance Verification h. Disconnect the coaxial cable. Connect a 50 W terminator to the channel to be used. Select the Offset menu, Automatic Calibrate, and then Proceed. k. Select Store Constants, and then Exit. 2. Connect the CTS TRANSMIT output to the communications signal analyzer as shown in Figure 4–5.
Page 124 STS-1 pulse shape (CTS 710 only), select the Standard Masks pop-up menu and then the STS-1 51.840 Mb menu item from the set of built-in ANSI T1.102 Electrical Standards masks. 4. To generate the STS-1 signal, set up the CTS 710 with the following sequence: Press Menu Button...
Page 125 Reconnect the CTS to the minloss pad with the short ( 1 m) 75 W coaxial cable that has not been used until this step in the procedure. 7. To verify the STSX-1 pulse shape, set up the CTS 710 with the following sequence: Press Menu Button...
Page 126 Verify that the test has passed, which is indicated by the green Passing message displayed in the Mask Testing pop-up menu selector. 11. To verify the STSX-3 pulse shape, set up the CTS 710 with the following sequence: Press Menu Button...
Page 127 13. Remove the short ( 1 m) length of 75 W coaxial cable and replace it with one 225 ft (68.6 m) length of 75 W reference cable. 14. To verify the STS-3 pulse shape at cross connect, set up the CTS 710 with the following sequence:...
Page 128 Performance Verification 18. To verify the STM-1E pulse shape, set up the CTS 750 with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT TRANSMIT Transmit Rate STM-1E SETTINGS Transmit Level High or 0 dB 19.
Page 129 Performance Verification Check Optical Output These tests verify the signal shape of the transmitted optical output pulse by Pulse Shape comparing with eye masks as specified in Bellcore TR-NWT-000253 and ITU G.703. These tests apply only if your CTS has one of the optional Electri- cal/Optical Plug-In Interface Modules installed.
Page 130 Performance Verification Communications Signal Analyzer Reference Receiver SD-22 and Power Meter CTS Test Set Input Transmit External Direct Output Optical Fiber Cable Trigger Input (Optical) 50 W SMA Coaxial Cable Optical Attenuator (Connectors SONET/SDH (Connector Already on the Reference Filter(s) Already on the Delay Cables) (Additional reference...
Page 131 100 followed by Enter. h. If you are verifying the CTS 750, skip to step 10. To verify the CTS 710 OC-1 pulse shape, select the Standard Masks pop-up menu and then the OC-1 51.84 Mb menu item from the set of built-in ANSI SONET...
Page 132 Performance Verification 11. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT TRANSMIT Transmit Rate OC-3 or STM-1 SETTINGS 12. If your CTS has Option 03 or Option 04, verify that the measurement on the optical power meter is in the range from –7 dBm to –12 dBm.
Page 133 Performance Verification 16. Verify that the measurement on the optical power meter is in the range from –7 dBm to –12 dBm. 17. Set up and perform the test with the following sequence on the communica- tions signal analyzer: a. Select the Standard Masks pop-up menu and then the OC-12/STM-4 622.08 Mb menu item from the set of built-in ANSI SONET Optical Standards masks.
Page 134 Performance Verification 1. Connect the CTS TRANSMIT output through the 75 W coaxial cable to the RECEIVE input as shown in Figure 4–7. You will need the additional items shown later in the procedure. CTS Test Set Receive Input Transmit Output 75 W Coaxial Cable Items used later in procedure: 225 ft Lengths AT&T...
Page 135 Performance Verification 4. If you are verifying a CTS 750, skip to step 22. To verify the STS-1 high-level sensitivity, continue the CTS 710 setup with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT...
Page 136 Performance Verification 13. Wait two minutes for the test to complete. When the START/STOP light turns off, verify that all ERROR RATIOS shown in the MAIN RESULTS –10 page are either 0.00 or less than 10 14. To verify the STS–1 low-level sensitivity, set up the CTS with the following sequence: Press Menu Button Select Menu Page...
Page 137 Performance Verification 22. To verify the STS-3 or STM-1E high-level sensitivity, set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT TRANSMIT Transmit Rate STS-3 or STM-1E SETTINGS Transmit Level High or 0 dB RECEIVE RECEIVE SETTINGS Receive Rate...
Page 138 Performance Verification 31. Wait two minutes for the test to complete. When the START/STOP light turns off, verify that all ERROR RATIOS shown in the MAIN RESULTS –10 page are either 0.00 or less than 10 32. To verify the STS-3 or STM-1E low-level sensitivity, set up the CTS with the following sequence: Press Menu Button Select Menu Page...
Page 139 Performance Verification Check Optical Input These tests verify the sensitivity of the optical receiver. These tests apply only if Sensitivity your CTS has one of the optional Electrical/Optical Plug-In Interface Modules installed. If your CTS does not have optical capability, proceed to Check Internal Clock Accuracy, which begins on page 4–46.
Page 140 1550 nm. 6. If you are verifying a CTS 750, skip to step 11. To verify the OC-1 sensitivity, continue the CTS 710 setup with the following sequence: Press Menu Button...
Page 141 Performance Verification 11. To verify the OC-3 or STM-1 sensitivity, set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT TRANSMIT Transmit Rate OC-3 or STM-1 SETTINGS Tx/Rx Settings Coupled RESULTS MAIN RESULTS none Errors...
Page 142 Performance Verification 19. Perform the test with the following steps: a. Press the START/STOP button, and verify that the START/STOP light is on. b. Wait two minutes for the test to complete; the START/STOP light turns off when the test is complete. –10 c.
Page 143 Set input impedance to 50 W. b. Set input coupling to AC. c. If you are using a Tektronix DC5010 counter, set the averages to 10 . If you are using an HP53131A counter, set DIGITS to 8 (refer to the...
Page 144 Set input impedance to 50 W. b. Set input coupling to AC. c. If you are using a Tektronix DC5010 counter, set the averages to 10 . If you are using an HP53131A counter, set DIGITS to 8 (refer to the...
Page 145 Performance Verification 5. To test negative transmit line frequency offset, change the CTS setup with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT POINTERS & Frequency Offset USER DEFINED TIMING Frequency Offset Coarse 6. Rotate the knob to set the Frequency Offset to –100 ppm, and then press Done.
Page 146 Set input impedance to 50 W. b. Set input coupling to AC. c. If you are using a Tektronix DC5010 counter, set the averages to 10 . If you are using an HP53131A counter, set DIGITS to 8 (refer to the...
Page 147 7. Verify that the Universal Counter/Timer reads between 51,834,578 Hz and 51,835,054 Hz (inclusive). Check Frequency Lock to This test only applies to the CTS 710. If you are testing a CTS 750, proceed to BITS Reference the next test, Check Frequency Lock to 2 Mb/s Reference, on page 4–53.
Page 148 Set channel A and B input coupling to AC. . If c. If you are using a Tektronix DC5010 counter, set the averages to 10 you are using an HP53131A counter, set DIGITS to 8 (refer to the HP53131A/132A Universal Counter operating guide, part number 53131-90021, pages 1-5, 2-7, 2-8, and 2-16, for instructions on how to set DIGITS).
Page 149 (Option 22), you have completed the performance verification. Check Frequency Lock to This test only applies to the CTS 750. If you are testing a CTS 710 without 2 Mb/s Reference Option 22 installed and have performed all previous functional and physical- layer tests, you have now completed the performance verification.
Page 150 Performance Verification Equipment Universal Counter/Timer (item 1) Required Frequency synthesizer (item 2) 50 W power splitter (item 21) SMA male-to-BNC female adapter (item 23), three required 50 W BNC coaxial cable (item 25), three required N male-to-BNC female adapter (item 27) 50 W SMB-to-BNC coaxial cable (item 28) Prerequisites All prerequisites listed on page 4–20...
Page 151 Performance Verification 2. Make the following settings on the Universal Counter/Timer: For the Tektronix DC5010: a. Set channel A and B input impedance to 50 W. b. Set channel A and B input coupling to AC. c. Set number of averages to 10 d.
Page 152 Performance Verification Check DS1 Transmit This test verifies the signal level from the CTS 710 DS1 output. If you are Signal Level checking a CTS 750 with Option 36, proceed to Check 2 Mb/s Balanced Transmit Pulse Mask, beginning on page 4–76.
Page 153 Performance Verification Tributary Signal Converter/Attenuator Bantam-to-Bantam Cable 50 W SMA Coaxial Cable Output SMA Male-to-BNC Female Adapter SD-22 2X Attenuators Input Communications Signal Analyzer CTS Test Set Figure 4–14: DS1 Signal Level Hookup 3. Perform the initial setup of the communications signal analyzer with the following steps: a.
Page 154 Verify that, after 32 acquisitions have completed, the mean value of the peak-peak measurement in the Peak-peak pop-up menu is 6 V 1 V. Check DS1 Transmit This test verifies the pulse shape of the CTS 710 DS1 output. Pulse Shape (CTS 710 Option 22 only)
Page 155 50 W Power DS1 Output Splitter 50 W SMA Coaxial Cable 2X Attenuators Figure 4–15: DS1 Pulse Shape Hookup 2. Set up the CTS 710 with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS...
Page 156 Performance Verification 3. Perform the initial setup of the communications signal analyzer with the following steps: a. To initialize the communications signal analyzer, select the UTILITY menu, the Initialize pop-up menu, and then select the Initialize menu item in the pop-up menu. b.
Page 157 Passing message displayed in the Mask Testing pop-up menu selector. Check DS1 Bridged This test verifies the DS1 bridged receive level for the CTS DS1 input. Receive Level (CTS 710 Option 22 only) 100 W Bantam-to-Bantam Cable (item 29), two required Equipment Required...
Page 158 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 159 Check DS1 Monitor This test verifies the monitor receive level of the CTS Option 22 RECEIVE/ Receive Level ADD input. (CTS 710 Option 22 only) Equipment Tributary Signal Converter/Attenuator (item 33), two required Required 100 W Bantam-to-Bantam Cable (item 30), two required...
Page 160 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 161 Performance Verification Check External Clock This test verifies the EXT CLOCK for the CTS. Input (CTS 710 Option 22 only) Equipment Frequency Synthesizer (item 2) Required 75 W BNC coaxial cable (item 19) 100 W Bantam-to-Bantam Cable (item 29), two required Prerequisites All prerequisites listed on page 4–20...
Page 162 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 163 Verify that there are no errors. d. Select Alarms; verify that there are no alarms. Check DS3 Transmit This test verifies the signal level of the CTS 710 DS3 output. Signal Level (CTS 710 Option 22 only) Equipment...
Page 164 Press the SELECT CHANNEL button next to the input connector on the sampling head channel you are using. c. Select the TRIGGER menu. Set the Source to Internal Clock. 3. Set up the CTS 710 with the following sequence: Press Menu Button Select Menu Page...
Page 165 Performance Verification Check DS3 Pulse Shape This test verifies the pulse shape from the CTS 710 DS3 output. (CTS 710 Option 22 only) Equipment Communications signal analyzer (item 4) Required Filter (item 8) 75 W to 50 W impedance converter (item 18)
Page 166 Performance Verification 2. Set up the CTS 710 with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TRANSMIT TRANSMIT Tx/Rx Settings Coupled SETTINGS Transmit Rate...
Page 167 Performance Verification 4. Perform the test with the following sequence on the communications signal analyzer: a. If necessary, select the DISPLAY MODES menu. b. Press AUTOSET. c. Adjust Vertical Offset and Main Position to locate a positive-going pulse at the center of the mask. d.
Page 168 Passing message displayed in the Mask Testing pop-up menu selector. Check DS3 Monitor This test verifies the monitor receive level of the CTS DS3 input. Receive Level (CTS 710 Option 22 only) 75 W BNC coaxial cable (item 19), two required Equipment Required...
Page 169 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 170 Performance Verification Check External Clock This test verifies the EXTERNAL CLOCK input of the CTS. Input (CTS 710 Option 22 only) Equipment Frequency Synthesizer (item 2) Required 75 W BNC coaxial cable (item 19), two required N-to-BNC adapter (item 27) Prerequisites All prerequisites listed on page 4–20...
Page 171 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 172 Performance Verification 6. Perform the test with the following steps: a. Press the START/STOP button and verify that the START/STOP light is on. b. Wait two minutes for the test to complete; the START/STOP light turns off when the test is complete. c.
Page 173 Performance Verification Tributary Signal Converter/Attenuator 50 W SMA Coaxial Cable DIN41628L Male-to-Male 120 W Cable 50 W Power SD-22 Input Splitter Communications Signal Analyzer CTS Test Set Male-to-BNC Attenuators Female Adapter 2 Mb/s Output External Direct 50 W SMA Coaxial Cable Trigger Input Figure 4–23: 2 Mb/s Pulse Mask Hookup 2.
Page 174 Performance Verification d. Select the WAVEFORM menu, select the Acquire Desc pop-up menu, and set Average N to On. e. Select Set Avg N, and set Average N to 64. Select the Sampling Head Fnc’s pop-up menu. g. Set the Ex Channel Attenuation to 8 the calibration factor of the Tributary Signal Converter/Attenuator.
Page 175 Performance Verification k. Define the trace as –M1 (this assumes the input signal is connected to M1) by pressing the - keypad key, then Mainframe channels 1, then Enter Desc. Select the WAVEFORM menu, select the Acquire Desc pop-up menu, set Average N to On, then press Exit.
Page 176 Performance Verification Check 2 Mb/s Monitor This test verifies the monitor receive level for the CTS Option 36 RECEIVE/ Receive Level ADD input. (CTS 750 Option 36 only) Equipment Tributary Signal Converter/Attenuator (item 33), two required Required 10X Attenuator (item 40) 2X Attenuator (item 41) 120 W DIN41628L cable (item 34), two required BNC Male to BNC Male Adapter (item 44)
Page 177 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 178 Performance Verification Check the 2 Mb/s This test verifies the bridged receive level for the CTS 2 Mb/s input. Balanced Bridged Receive Level Equipment Tributary Signal Converter/Attenuator (item 33), two required (CTS 750 Option 36 only) Required 50 W BNC cable (item 25) 120 W DIN41628L cable (item 34), two required 50 W terminator (item 42) Prerequisites...
Page 179 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 180 Performance Verification Check 2 Mb/s Balanced This test verifies the external Clock input of the CTS. External Clock Input (CTS 750 Option 36 only) Equipment Frequency Synthesizer (item 2) Required 75 W BNC coaxial cable (item 19) N-to-BNC adapter (item 27) 120 W DIN41628L cable (item 34) Prerequisites All prerequisites listed on page 4–20...
Page 181 Performance Verification 3. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 182 Performance Verification Check the 2 Mb/s This test verifies the 2 Mb/s pulse mask from the CTS. Unbalanced Transmit Pulse Mask Equipment Communications signal analyzer (item 4) (CTS 750 Option 36 only) Required 75 W to 50 W impedance converter (item 18) 50 W power splitter (item 21) 50 W SMA coaxial cable (item 22), two required SMA male-to-BNC female adapter (item 23)
Page 183 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TRANSMIT TRANSMIT Tx/Rx Settings Coupled SETTINGS Transmit Rate 2 Mb/s Unbalanced Test Pattern All Ones Framing...
Page 184 Performance Verification Set the Vertical Size to 414 mV/DIV. k. Select Mask Testing pop-up menu and then the Set N Waveforms menu item. Select the Waveform N pop-up menu (red boxes located just to the left of the two front panel knobs) then enter the numeric value 20 followed by Exit.
Page 185 Performance Verification o. Adjust Vertical Offset and Main Position to locate a positive-going pulse at the center of the mask. p. Change the Vertical Offset and Main Position controls to Fine resolution. q. Adjust the fine Vertical Offset and Main Position controls to position the pulse optimally within the mask.
Page 186 Performance Verification SMA Male-to-BNC Female Adapter 50 W SMA Coaxial Cable 50 W Coaxial Cable 50 W Power SD-22 Input Communications Splitter Signal Analyzer CTS Test Set 2 Mb/s Output 75 W to 50 W External Direct 50 W SMA Coaxial Cable Impedance Converter Trigger Input Figure 4–28: 34 Mb/s Pulse Mask Hookup...
Page 187 Performance Verification e. Select Set Avg N, and set Average N to 64. Select the Sampling Head Fnc’s pop-up menu and set Smoothing to On. g. Set the Ex Channel Attenuation to 4.8. h. Select the DISPLAY MODES menu. Select the Standard Masks pop-up menu and then the Pulse 34.368Mb menu item from the set of built-in ITU G.703 Electrical Standards masks.
Page 188 Performance Verification k. Verify that the V/DIV display and sampling head Ex Channel Attenua- tion have not changed. Select the WAVEFORM menu, select the Acquire Desc pop-up menu, and set Average N to On. m. Select the DISPLAY MODES menu. n.
Page 189 Performance Verification 1. Connect the communications signal analyzer and CTS as shown in Figure 4–29. SMA Male-to-BNC Female Adapter 50 W SMA Coaxial Cable 50 W Coaxial Cable 50 W Power SD-22 Input Communications Splitter Signal Analyzer CTS Test Set 2 Mb/s Output 75 W to 50 W External Direct...
Page 190 Performance Verification c. Adjust the communications signal analyzer for 10 ns, 50 mV, and a stable trigger. d. Select the WAVEFORM menu, select the Acquire Desc pop-up menu, and set Average N to On. e. Select Set Avg N, and set Average N to 64. Select the Sampling Head Fnc’s pop-up menu.
Page 191 Performance Verification Select the Stop N Waveforms menu item. g. After 20 waveforms have been acquired, the acquisition stops automati- cally. Verify that the test has passed, which is indicated by the green Passing message displayed in the Mask Testing pop-up menu selector. h.
Page 192 Performance Verification Check the 2 Mb/s This test verifies the bridged receive level of the CTS 2 Mb/s input. Unbalanced Bridged Receive Level 75 W BNC coaxial cable (item 19), two required Equipment (CTS 750 Option 36 only) Required BNC Female to BNC Female adapter (item 26) 75 W terminator (item 43) Prerequisites All prerequisites listed on page 4–20...
Page 193 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TEST SETUPS TEST CONTROL none USER DEFINED Minute Rotate knob for 2 m DONE TRANSMIT TRANSMIT...
Page 194 Performance Verification Check the 2 Mb/s This test verifies the 2 Mb/s monitor receive level of the CTS. Unbalanced Monitor Receive Level 75 W BNC coaxial cable (item 19), two required Equipment (CTS 750 Option 36 only) Required BNC Female to BNC Female adapter (item 26) 10X Attenuator (item 38) 2X Attenuator (item 39) Prerequisites...
Page 195 Performance Verification 3. Press the START/STOP button and verify that the START/STOP light is on. 4. Verify that there are no bit errors or bipolar violations for a measurement period of at least 30 seconds. Check the 34 Mb/s This test verifies the 34 Mb/s monitor receive level of the CTS. Monitor Receive Level (CTS 750 Option 36 only) 75 W BNC coaxial cable (item 19), two required...
Page 196 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TRANSMIT TRANSMIT Tx/Rx Settings Coupled SETTINGS Transmit Rate 34 Mb/s Test Pattern PRBS 2^23–1 Framing...
Page 197 Performance Verification 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TRANSMIT TRANSMIT Tx/Rx Settings Coupled SETTINGS Transmit Rate 140 Mb/s Test Pattern PRBS 2^23–1 Framing...
Page 198 Performance Verification CTS Test Set Frequency Synthesizer 75 W Coaxial Cable OUTPUT Type N to BNC Adapter Rear Panel PDH 75 W BNC Coaxial Cable Ext Clock Input Figure 4–34: 2 Mb/s External Clock Hookup 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter...
Page 199 Performance Verification 4. Perform the test with the following steps: a. Press the START/STOP button and verify that the START/STOP light is on. b. Wait two minutes for the test to complete; the START/STOP light turns off when the test is complete. c.
Page 200 Performance Verification CTS Test Set Frequency Synthesizer 75 W Coaxial Cable OUTPUT Type N to BNC Adapter Rear Panel PDH External Clock Input 75 W BNC Coaxial Cable Figure 4–35: 34 Mb/s External Clock Hookup 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter...
Page 201 Performance Verification 4. Perform the test with the following steps: a. Press the START/STOP button and verify that the START/STOP light is on. b. Wait two minutes for the test to complete; the START/STOP light turns off when the test is complete. c.
Page 202 Performance Verification CTS Test Set Frequency Synthesizer 75 W Coaxial Cable OUTPUT Type N to BNC Adapter Rear Panel PDH 75 W BNC Coaxial Cable External Clock Input Figure 4–36: 140 Mb/s External Clock Hookup 2. Set up the CTS with the following sequence: Press Menu Button Select Menu Page Highlight Parameter...
Page 203 Performance Verification 4. Perform the test with the following steps: a. Press the START/STOP button and verify that the START/STOP light is on. b. Wait two minutes for the test to complete; the START/STOP light turns off when the test is complete. c.
Page 204 Performance Verification 2 Mb/s Input CTS Test Set 2 Mb/s Signal Source OUTPUT DIN41628L Male-to-Male 120 W Cable Figure 4–37: 2 Mb/s Cable Equalization Hookup 2. Perform the initial setup of the 2 Mb/s Signal Source with the following steps: a.
Page 205 Performance Verification Check the 34 Mb/s This test verifies the 34 Mb/s Cable Equalization for the CTS. Cable Equalization (CTS 750 Option 36 only) 656 ft (200 m) length of 75 W Reference Cable (items 13, 14, and 17 Equipment Required connected in series) Prerequisites...
Page 206 Performance Verification Check the 140 Mb/s This test verifies the 140 Mb/s Cable Equalization for the CTS. Cable Equalization (CTS 750 Option 36 only) 656 ft (200 m) length of 75 W Reference Cable (items 13, 14, and 17 Equipment Required connected in series) Prerequisites...
Page 207 Performance Verification Low-Frequency Perform the following setup to prepare for the Low-Frequency Jitter Tests. Jitter Tests (CTS 750 Option 14 only) 75 W BNC coaxial cable (item 19), two required Equipment Required Optical fiber cable (item 13) Prerequisites All prerequisites listed on page 4–20 All previous Physical Layer Tests Time Required Approximately 30 minutes...
Page 208 Performance Verification 2. Perform the initial CTS setup with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TEST SETUPS RECALL DEFAULT FACTORY Recall Setup INSTRUMENT SETTINGS SETUPS TRANSMIT TRANSMIT Tx/Rx Settings Coupled SETTINGS TRANSMIT JITTER & WANDER Jitter/Wander Generation Jitter Output...
Page 209 Performance Verification 5. Press the START/STOP button, and verify that the START/STOP light is 6. Wait 30 seconds for the test to complete. 7. Verify that the current peak-to-peak jitter measurement is within the limits specified in column 7 of Table 4–5 (inclusive). 8.
Page 210 Performance Verification High-Amplitude Perform the following setup to prepare for the High-Amplitude Jitter Tests. Jitter Tests (CTS 750 Option 14 only) Equipment Spectrum analyzer (item 12) Required 75 W BNC coaxial cable (item 19), three required Optical fiber cable (item 13) 75 W to 50 W impedance converter (item 18) N-to-BNC adapter (item 27) Prerequisites...
Page 211 Performance Verification 3. Perform the initial setup of the spectrum analyzer with the following steps: a. Set the reference level to 0 dBm. b. Set the vertical scale factor to 10 dB/division. c. Set the sweep to free run. d. Set the sweep to auto (or coupled). 4.
Page 212 Performance Verification 5. For each row in Table 4–6, set up the spectrum analyzer as follows: a. Set the span (total over 10 divisions) to the value in column 3 of Table 4–6. b. Set both the resolution bandwidth and video bandwidth to the value in column 4 of Table 4–6.
Page 213 Performance Verification 6. Set up the CTS with the following sequence using the values specified in Table 4–7: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT TRANSMIT Transmit Rate as specified in SETTINGS column 1 of Table 4–7 TRANSMIT JITTER &...
Page 214 Performance Verification 10. Increase the generated Jitter Amplitude by the increment listed in column 4 of Table 4–7 using the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT JITTER & WANDER Jitter Amplitude increase by amount specified in column 4 of Table 4–7 11.
Page 215 Performance Verification Table 4–7: CTS Generation Setups Transmit/Clock Rate Jitter Frequency Initial Jitter Amplitude Initial Increment Jitter Limits 2 Mb/s (Unbalanced) 2.5 kHz 1.62 UI 0.02 UI 1.64 to 1.88 UI 2 Mb/s (Unbalanced) 1.8 kHz 8.2 UI 0.1 UI 8.28 to 9.22 UI 2 Mb/s (Unbalanced) 6.4 kHz...
Page 216 Performance Verification 15. Set up the CTS with the following sequence using values specified in Table 4–8: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT JITTER & WANDER Jitter Output Line RECEIVE JITTER & WANDER Jitter Measurement as specified in Range column 3 of Table 4–8...
Page 217 Performance Verification Table 4–8: CTS Measurement Setups Transmit Rate Jitter Frequency Jitter Range Jitter Filter Measured Jitter Limits 2 Mb/s (Unbalanced) 2.5 kHz Normal Wideband 1.635 to 1.885 UI 2 Mb/s (Unbalanced) 1.8 kHz Extended Wideband 8.17 to 9.33 UI 2 Mb/s (Unbalanced) 6.4 kHz Normal...
Page 218 Performance Verification Low-Amplitude Perform the following setup to prepare for the Low-Amplitude Jitter Tests. Jitter Tests (CTS 750 Option 14 only) Equipment Spectrum analyzer (item 12) Required 75 W BNC coaxial cable (item 19), three required Optical fiber cable (item 13) 75 W to 50 W impedance converter (item 18) N-to-BNC adapter (item 27) Prerequisites...
Page 219 Performance Verification 3. Perform the initial setup of the spectrum analyzer with the following steps: a. Set the reference level to 0 dBm. b. Set the vertical scale factor to 10 dB/division. c. Set the sweep to free run. d. Set the sweep to auto (or coupled). 4.
Page 220 Performance Verification 5. For each row in Table 4–9, set up the spectrum analyzer as follows: a. Set the span (total over 10 divisions) to the value in column 3 of Table 4–9. b. Set both the resolution bandwidth and video bandwidth to the value in column 4 of Table 4–9.
Page 221 Performance Verification 6. Set up the CTS with the following sequence using the values specified in Table 4–10: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT TRANSMIT Transmit Rate as specified in SETTINGS column 1 of Table 4–10 TRANSMIT JITTER &...
Page 222 Performance Verification 10. Continue the CTS setup with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT JITTER & WANDER Jitter/Wander Generation 11. On the spectrum analyzer display, measure the amplitudes (in dBm) of the center frequency (CF), the first side lobe above the carrier (USL), and the first side lobe below the carrier (LSL).
Page 223 Performance Verification 14. Set up the CTS with the following sequence using values specified in Table 4–11: Press Menu Button Select Menu Page Highlight Parameter Select Choice TRANSMIT JITTER & WANDER Jitter Output Line RECEIVE JITTER & WANDER Jitter Measurement as specified in Range column 3 of...
Page 224 Performance Verification You have completed the CTS performance verification procedures. 4–128 CTS 700-Series Service Manual...
Page 226 H Connect a GPIB controller with talker/listener software to the CTS GPIB port. H If you have a Tektronix VX4610 and a PC controller, you can use the UI4610 Software, a standard accessory of the VX4610, to communicate with your CTS. The UI4610 Software contains a GPIB talker/listener tool.
Page 227 Table 5–2: Required Tools and Equipment for Adjustment Item Number and Description Minimum Requirements Example Purpose Universal Counter/Timer 60 MHz frequency measurement Tektronix DC 5010 Digital Adjusting the internal clock capability; 0.25 ppm time base Counter/Timer with TM 5000 frequency accuracy; 9 digits; averaging to mainframe 50 W SMB-to-BNC Coaxial 50 W impedance;...
Page 228 Adjustment Procedures needed to establish communication. The CTS communication port settings are accessible with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice UTILITY REMOTE CONTROL as needed as needed 2. Using the terminal or controller, send the following command (substitute the actual serial number for the parameter <s/n>): SYSTem:SERIal <s/n>";...
Page 229 Adjustment Procedures 1. Connect the terminal, terminal emulator, or controller to the RS-232 or GPIB port on the rear panel of the CTS. Set the communication port parameters as needed to establish communication. The CTS communication port settings are accessible with the following sequence: Press Menu Button Select Menu Page Highlight Parameter...
Page 230 Adjustment Procedures b. Set input coupling to AC. c. Set number of averages to 10 d. Set measurement mode to Frequency. 6. Verify that the Universal Counter/Timer reads between 51,839,960 Hz and 51,840,238 Hz (inclusive). If it does, the internal clock frequency is within tolerance and you have completed this procedure.
Page 231 Adjustment Procedures Clock Generator Board Crystal Oscillator Figure 5–2: Location of Crystal Oscillator 11. Using the flat-bladed screwdriver, carefully remove the slotted screw on the side of the crystal oscillator to access the adjustment screw. 12. Insert the adjustment tool into the crystal and adjust the internal clock frequency to 51,840,000 Hz 10 Hz.
Page 232 Adjustment Procedures Equipment External Graticule Test Fixture (item 3) Required Photometer (item 4) Adjustment Tool (item 6) Flat-Bladed Screwdriver (item 7) Time Required Approximately one hour 1. To adjust the display monitor, you must remove the line cord, rear cover, and cabinet.
Page 233 Adjustment Procedures V. SYNC (R453) Left Side of Instrument H. SYNC (R473) Front of Instrument Figure 5–3: Monitor Adjustment Locations 5. To adjust the vertical and horizontal sync, perform the following steps: a. If the display rolls vertically, adjust V. SYNC (R453) to the center of the stable display range.
Page 234 Adjustment Procedures 6. To adjust the display brightness, perform the following steps: a. Set the CTS to display a gray field pattern (see Figure 5–4) with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice UTILITY SELF TEST Self Test Group DISPLAY...
Page 235 Adjustment Procedures 7. To adjust video gain perform the following steps: a. Set the CTS to display a white box pattern (see Figure 5–5) with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice UTILITY SELF TEST Self Test Group DISPLAY Self Test Routine...
Page 236 Adjustment Procedures e. If you adjusted the video gain, repeat steps 6 and 7 until both the brightness and video gain measurements are within tolerance. 8. To adjust the display focus, perform the following steps: a. Set the CTS to display a composite test pattern (see Figure 5–6) with the following sequence: Press Menu Button Select Menu Page...
Page 237 Adjustment Procedures 9. To adjust the display position and size, perform the following steps: a. Set the CTS to display a test grid pattern (see Figure 5–7) with the following sequence: Press Menu Button Select Menu Page Highlight Parameter Select Choice UTILITY SELF TEST Self Test Group...
Page 238 Adjustment Procedures 8 6 Test Grid Pattern on the CRT External Graticule Test Fixture with Marked Limit Lines Test Limit Lines Pattern Figure 5–8: External Graticule Limit Lines c. Adjust V. POS (R445) so that the horizontal centerline is within the limit lines of the External Graticule Test Fixture.
Page 239 Adjustment Procedures d. Adjust V. SIZE (R452) so that the top and bottom lines are within their limits. You can reposition the External Graticule Test Fixture as necessary to make this adjustment. e. Reposition the External Graticule Test Fixture so that it is centered (approximately) in the CTS bezel opening.
Page 241 Maintenance This section contains the information needed to do periodic and corrective maintenance on the CTS 700-Series Test Sets. The following sections are included: H Preparation — General information on preventing damage to internal modules when doing maintenance. H Inspection and Cleaning — Information and procedures for inspecting the CTS and cleaning its external and internal modules.
Page 242 Maintenance H Diagrams contains a block diagram using individual modules as blocks and an interconnect diagram showing connections between the modules. H Mechanical Parts List contains a list of field replaceable modules by part number. Preventing ESD When performing any service which requires internal access to the CTS, follow these precautions to prevent electrostatic discharge (ESD) damage to internal modules and their components: CAUTION.
Page 243 Use a 75% isopropyl alcohol solution as a cleaner and rinse with deionized water. Before using any other type of cleaner, consult your Tektronix Service Center or representative. Avoid the use of high pressure compressed air when cleaning dust from the interior of the CTS.
Page 244 Inspection and Cleaning Inspection — Exterior Inspect the outside of the CTS for damage, wear, and missing parts using Table 6–1 as a guide. You should thoroughly check a CTS that appears to have been dropped or otherwise abused to verify correct operation and performance. Immediately repair defects that could cause personal injury or lead to further damage to the CTS.
Page 245 Inspection and Cleaning 3. Gently pull the bulkhead out of the unit and unscrew the fiber connector. Be careful not to pull beyond the fiber slack. 4. Using a soft, lint-free cloth with a high-quality glass cleaner, clean the tip of the fiber cable.
Page 246 Inspection and Cleaning Inspection — Interior To access the inside of the CTS for inspection and cleaning, refer to Removal and Replacement, starting on page 6–9 in this section. Inspect the internal portions of the CTS for damage and wear, using Table 6–2 as a guide.
Page 247 Inspection and Cleaning 4. Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate. 5. Use hot (120_ F to 140_ F, 49_ C to 60_ C) deionized water to thoroughly rinse the parts.
Page 248 Inspection and Cleaning 6–8 CTS 700-Series Service Manual...
Page 249 Removal and Replacement This section contains the following information: H Preparatory information H A list of equipment required to remove and disassemble all modules H Module locator diagrams for finding the modules in the CTS H Procedures for removal and replacement of the modules Preparation WARNING.
Page 250 Removal and Replacement Figure 6–2: CTS 700-Series Test Set Orientation Summary of Procedures The procedures are described in the order in which they appear in this section. These procedures are also listed in the Table of Contents. H The Access Procedure on page 6–11 first directs you to the procedures that remove any modules that must be removed to access the module to be serviced.
Page 251 Removal and Replacement step of its procedure. All the tools are standard tools readily available from tool suppliers. Table 6–3: Tools Required for Module Removal Item No. Name Description Screwdriver handle Accepts Torx-driver bits. T-15 Torx tip Torx-driver bit for T-15 size screw heads. T-20 Torx tip Torx-driver bit for T-20 size screw heads.
Page 252 Removal and Replacement b. Note the number of the figure in which you found the module and the module name. 2. If you located the module in Figure 6–3, do the following substeps. If not, skip to step 3. a. Go to Table 6–4 on page 6–13. b.
Page 253 Removal and Replacement Table 6–4: Access Instructions for Modules in Figure 6–3 Procedure Including Module to be Removed Page No. Access Instructions Optical Port Connector 6–22 Do only the procedure listed at left. Front-Panel Knob 6–24 Do only the procedure listed at left. Line Fuse and Line Cord 6–26 Do only the procedure listed at left.
Page 254 Removal and Replacement Line Power Cord Fuse Rear Label Clamp Rear Cover Fuse Line Cord Rear EMI Gasket Options Cabinet Labels Front Foot (2) Handle Add/Drop Label Assembly Rear Foot (2) Menu Flex Circuit Menu Button Elastomer Trim Ring Menu Button (13) Bezel Label...
Page 255 Removal and Replacement Table 6–5: Access Instructions for Modules in Figure 6–4 Procedure Including Module to be Removed Page No. Access Instructions A10 High Speed Protocol Assembly 6–39 Do the procedure listed at left to remove the module. A09 Main Protocol Assembly 6–41 Do Com Bus, Board Supports, and PCAT Bus, removing only the Com Bus and the PCAT Bus.
Page 256 Removal and Replacement Table 6–5: Access Instructions for Modules in Figure 6–4 (Cont.) Procedure Including Module to be Removed Page No. Access Instructions Back-Up Battery 6–56 Do EMI Shield. Do Com Bus, Board Supports, and PCAT Bus. Do the card-cage board procedures: A03 CPU Assembly, A01 Display Assembly, A08 Clock Generator Assembly, and Tributary Assembly.
Page 257 Removal and Replacement A07 Auxiliary Power Supply Fan Mount Baffle A25 Low Voltage Power Mount: Backplane Supply Assembly and LV Power Supply A26 Monitor Line Assembly Filter EMI Clip (2) Shield CRT Filter Circuit Board Frame Bracket Cable Retainer Chassis Back-up Battery Battery Retainer...
Page 258 Removal and Replacement Table 6–6: Access and Removal Instructions for Cables in Figures 6–5 and 6–6 Name of Cable Access and Removal Instructions Disk Drive-to-Display Lift up on the latch at each side of both jacks. Unplug the cable to be replaced from the disk drive and A03 CPU assemblies.
Page 259 Removal and Replacement Table 6–6: Access and Removal Instructions for Cables in Figures 6–5 and 6–6 (Cont.) Name of Cable Access and Removal Instructions Auxiliary Power Supply-to-Line Filter Find the procedure A07 Auxiliary Power Supply in Table 6–5. Auxiliary Power Supply-to-Low Voltage Power Follow the access instructions found there to access and remove the Supply Auxiliary Power Supply assembly.
Page 260 Line Filter-to-Ground Lug Auxiliary Power Supply-to-Low Voltage Power Supply-to-Ground Lug Backplane-to-Auxiliary Power Supply Monitor Cable Backplane-to-Low Voltage Power Supply-to-Protocol Com Bus Disk Drive-to-Display Clock Generator-to-Protocol PCAT Bus CPU-to-Front Panel Figure 6–5: CTS 710 Cables and Cable Routing 6–20 CTS 700-Series Service Manual...
Page 261 Removal and Replacement Line Filter-to-Ground Lug Auxiliary Power Supply-to-Low Voltage Power Supply-to-Ground Lug Monitor Cable Backplane-to-Low Voltage Power Supply-to-Protocol Com Bus PCAT Bus Backplane-to-Auxiliary Power Supply Disk CPU-to-Front Drive-to-Display Panel Clock Generator-to-Protocol Figure 6–6: CTS 750 Cables and Cable Routing 6–21 CTS 700-Series Service Manual...
Page 262 Removal and Replacement Procedures for Module Removal and Installation Do the Access Procedure (page 6–11) before doing any procedure in this collection. Optical Port Connector The CTS is shipped with the FC connector bulkhead and dustcap installed. If you wish to replace the connector or change to the ST, DIN 47256, or SC connectors perform the following procedure: 1.
Page 263 Removal and Replacement Figure 6–8: ST Optical Bulkhead Assembly Figure 6–9: DIN 47256 Optical Bulkhead Assembly 6–23 CTS 700-Series Service Manual...
Page 264 Removal and Replacement Figure 6–10: SC Optical Bulkhead Assembly 5. Replace the current bulkhead with the one you wish to use and re-assemble. 6. The final part of installation is the reverse of steps 1 through 3. Front-Panel Knob For this procedure you will need a 1/16 inch hex key screwdriver (item 12). 1.
Page 265 Removal and Replacement Allen Screw Knob Figure 6–11: Knob Removal 6–25 CTS 700-Series Service Manual...
Page 266 Removal and Replacement Line Fuse and Line Cord For this procedure you will need a flat-bladed screwdriver (item 4). WARNING. Unplug the line cord from the line voltage power source before continuing. Failure to do so can cause death or injury. 1.
Page 267 Removal and Replacement Front Cover, Rear Cover, For this procedure you will need a screwdriver with size T-15 and T-20 TorxR Cabinet, Rear EMI Gasket, tips (items 1, 2, and 3) and a flat-bladed screwdriver (item 4). If removing the EMI gasket at the inside rear of the cabinet, you will also need a pair of and Cabinet Handle and needle-nose pliers (item 5).
Page 268 Removal and Replacement T-15 Torx- Drive Screws Label Rear Cover Rear Foot: Push out from inside rear cover. EMI Gasket: Access from the front of cabinet. Handle Assembly: Remove the internal screws and pull out handle hubs to remove. Front Foot: Rotate and remove. T-15 Torx- Drive Screw Figure 6–13: Front Cover, Rear Cover, Cabinet, EMI Gasket, and Cabinet Handle and Feet Removal...
Page 269 Removal and Replacement 7. If removing the handle assembly for cleaning or replacement, perform the following steps: a. Working from the inside of the cabinet, remove the T-20 Torx-drive screw securing each handle hub to the cabinet. b. Working from the outside of the cabinet, grasp the two handle hubs and pull them outward from the cabinet until they are out of the cabinet.
Page 270 Removal and Replacement H When sliding the cabinet onto the CTS, be sure the ridge around the rear of the main chassis slides into the groove containing the EMI gasket on the rear of the cabinet. H Install the four screws at the rear panel, and tighten to 8 inch-lbs torque before installing the single screw at the left side of the cabinet.
Page 271 Removal and Replacement Trim Ring: To remove, lift the top flex locks outward. Flex the trim ring outward; then pull it loose. Repeat for the bottom edge of trim ring. Flex Lock Trim Ring Menu Buttons (13) EMI Gaskets (3) Menu Elastomer Figure 6–14: Trim Ring, Menu Elastomer, and Menu Buttons Removal...
Page 272 9. If the trim ring installed in step 7 is a new trim ring, also do the following: a. Find the label that matches your model CTS (CTS 710 or CTS 750). b. Remove the covering from the back of the sticky-back label, align it to the trim ring, and press firmly to install.
Page 273 Removal and Replacement Plug-In Interface Module For this procedure you will need a flat-bladed screwdriver (item 4). 1. Set the CTS so its bottom is down and its front is facing you. 2. To remove the Plug-In Interface Module, perform the following steps using Figure 6–16 as a guide: a.
Page 274 Removal and Replacement 3. To reinstall the Plug-In Interface Module, perform the following steps: a. Align the Plug-In Interface module edges with the guides, and then slide it into the cavity of the CTS. b. Using both thumbs, press on the Plug-In Interface Module front panel until the module is completely seated in the CTS.
Page 275 Removal and Replacement b. Remove the cable from the drive. c. If present, remove the T-15 Torx-drive screw that clamps the drive in the chassis. When replacing the drive, do not reinstall this screw. d. Remove the one or two screws securing the drive to the chassis. e.
Page 276 Removal and Replacement Chassis Ground Lug Locator Studs Menu Flex Circuit Opt. 22: J225, J21 and J218 Ground Opt. 36: J225, J5 and J6 To J301 CPU-to-Front-Panel Cable Snap Lock Press latch to release J101 A06 Front Panel Assembly Figure 6–18: A06 Front Panel Assembly and Menu Flex Circuit Removal NOTE.
Page 277 Removal and Replacement Circuit Board Snap Locks Gasket Menu Button Elastomer Front Panel Circuit Board Menu Button Light Pipe J301 J101 Figure 6–19: Disassembly of the Front Panel Assembly c. Disassemble the front-panel-assembly components using Figure 6–19 as a guide. During disassembly, be careful not to spill the light pipes from their sockets;...
Page 278 Removal and Replacement CAUTION. Perform step 5 only if replacing a failed or damaged menu flex circuit with a new unit from the factory. (Removal of the circuit is likely to destroy it.) If this is not the case, skip to step 7 to continue this procedure. 5.
Page 279 Removal and Replacement A10 High Speed Protocol For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 Assembly and 2). 1. If you have not already performed the Access Procedure on page 6–11 and removed the modules as instructed, do so now.
Page 280 Removal and Replacement A10 High Speed Protocol Assembly T-15 Torx-Drive Screws (4) Figure 6–20: A10 High Speed Protocol Assembly Removal 6–40 CTS 700-Series Service Manual...
Page 281 Removal and Replacement A09 Main Protocol For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 Assembly and 2) and 3/16 inch and 1/4 inch nut drivers (items 9 and 10). 1. If you have not already performed the Access Procedure on page 6–11 and removed the modules as instructed, do so now.
Page 282 Removal and Replacement J690 3/16 in Screws (2) A09 Main Overhead Protocol Add/Drop Assembly Connector T-15 Torx-Drive Screws (3) J993 J930 Spacer Post Figure 6–21: A09 Main Protocol Assembly Removal A26 Monitor Assembly For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 and 2).
Page 283 Removal and Replacement NOTE. The display tube and the display-driver board are a single module and must be removed and replaced as one unit. They are listed as a single module in the Mechanical Parts List. 2. Set the CTS so its bottom is down on the work surface, with its front facing you.
Page 284 Removal and Replacement g. If replacing the CRT filter frame, press the locking tab at the top center of the frame while pushing the frame into the CTS. Lift the frame out of the chassis to complete its removal. Baffle J901 A26 Monitor Assembly...
Page 285 Removal and Replacement 4. To reinstall the filter frame and monitor, perform steps 3a–3g in reverse order. If the EMI clips on the monitor are replaced, be sure to center them in the notched area of the top and bottom of the chassis. Com Bus, Board For this procedure, no tools are required.
Page 286 Removal and Replacement 4. Grasp the PCAT bus by its cable pull tab and pull to unplug it from J915 of the Display assembly. Then grasp the connector and pull to unplug it from J690 of the A09 Main Protocol assembly (see Figure 6–23). CAUTION.
Page 287 Removal and Replacement T-15 Torx-Drive Screws EMI Shield Figure 6–24: EMI Shield Removal A03 CPU Assembly When you disconnect the battery, you will lose all saved front panel setups. Adjustment constants, stored internally when the CTS is adjusted, are not lost. For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 and 2).
Page 288 Removal and Replacement b. Remove the cable from J3 of the A03 CPU assembly. c. Grasp the board by its edge, and pull outward to unplug it from J2 of the backplane assembly. d. Slide the board part way out until you can reach the CPU-to-front-panel cable at J4.
Page 289 Removal and Replacement 4. To reinstall the A03 CPU assembly, perform steps 3a–3f in reverse order. After plugging in the CPU-to-front-panel cable at J4, be sure to dress the cable so that the loop of extra cable is tucked behind the A06 Front Panel assembly, as shown in Figure 6–25.
Page 290 Removal and Replacement J1 of Backplane Assembly A01 Display Assembly T-15 Torx-Drive Screw J201 Remove from J1 of the disk drive. Figure 6–26: A01 Display Assembly Removal A08 Clock Generator For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 Assembly and 2).
Page 291 Removal and Replacement A08 Clock Generator Assembly T-15 Torx-Drive Screw Figure 6–27: A08 Clock Generator Removal d. As you remove the assembly, you will need to tilt it slightly so that the rear connectors can clear the chassis. Slide the assembly out of the chassis to complete the removal.
Page 292 Removal and Replacement 3. To remove the Tributary assembly, perform the following steps using Figure 6–28 as a guide: a. Unplug the Tributary-to-front- and rear-panel cables from the Tributary assembly (J225, J217, J218, and J220 on Option 22; J225, J5, J6, and J7 on Option 36).
Page 293 Removal and Replacement A13 Tributary Assembly (CTS 710) T-15 Torx-Drive Screw A11 Tributary Assembly (CTS 750) T-15 Torx-Drive Screw Figure 6–28: Tributary Removal JAWA/JAWG Assembly For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 and 2).
Page 294 Removal and Replacement c. Remove the single T-15 Torx-drive screw from the bracket that secures the JAWA/JAWG assembly at the inside rear corner of the main chassis. d. Grasp the board by its edges, and pull upward to unplug it from the backplane assembly.
Page 295 Removal and Replacement A02 Backplane Assembly For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 and 2) and a flat-bladed screwdriver (item 4). 1. If you have not already performed the Access Procedure on page 6–11 and removed the modules as instructed, do so now.
Page 296 Removal and Replacement Lift Flex Locks (4) to release board. A02 Backplane Assembly Unused Board Bracket T-15 Torx-Drive Screws (5) Figure 6–30: A02 Backplane Assembly Back-Up Battery When you disconnect the battery, you will lose all saved front panel setups. Adjustment constants, stored internally when the CTS is adjusted, are not lost.
Page 297 Removal and Replacement WARNING. The battery used in this CTS can present a fire or chemical burn hazard if mistreated. Do not recharge, rapidly discharge, disassemble, heat above 100_ C, or incinerate. Replace the battery with the part number listed in the Mechanical Parts List section only.
Page 298 Removal and Replacement 5. To reinstall the battery and its retainer, perform steps 2 and 3 in reverse order. Fan and Fan Mount For this procedure, no tools are required. 1. If you have not already performed the Access Procedure on page 6–11 and removed the modules as instructed, do so now.
Page 299 Removal and Replacement c. While holding the flex locks released, slide the fan mount so its four retainer lugs slide from their small retainer holes in the chassis into their large release holes. d. Move the fan mount inward so its retainer lugs are out of the large retainer holes, and lift it out of the chassis to remove.
Page 300 Removal and Replacement b. To reinstall the fan, perform steps 3a–3b in reverse order. Be sure the two locks snap into place to secure the fan. A25 Low Voltage Power For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 Supply and its Mount and 2) and a pair of duck-bill pliers (item 6).
Page 301 Removal and Replacement 4. To remove the power-supply mount, perform the following steps: a. Place the CTS so its left side is down, with its top facing you. b. Press the two retainer locks, and slide the power-supply mount towards the top of the CTS to unlock from the chassis.
Page 302 Removal and Replacement 5. To reinstall the Low Voltage Power Supply and its mount, perform the following steps: a. If the power supply mount was removed, perform steps 4a–4c in reverse order. When reinstalling the power-supply mount, be sure to press it flush against the chassis before sliding it towards the bottom of the chassis to lock.
Page 303 Removal and Replacement Black White Striped Striped CTS 710 only Figure 6–35: Auxiliary Power Supply Removal Line Filter For this procedure you will need a screwdriver with a size T-15 Torx tip (items 1 and 2). 1. If you have not already performed the Access Procedure on page 6–11 and removed the modules as instructed, do so now.
Page 304 Removal and Replacement Line Filter White Striped Black Striped Figure 6–36: Line Filter Removal WARNING. When reconnecting the Auxiliary Power Supply to the line filter, be sure to connect the neutral side of the line filter to the white-striped lead and the load side to the black-striped lead.
Page 305 Removal and Replacement Disassembly for Cleaning This procedure is for disassembly of the CTS 700-Series Test Set into its individual modules so they can be cleaned. Read the cleaning instructions in Inspection and Cleaning on page 6–3 of this section before disassembling the CTS.
Page 306 Removal and Replacement q. A03 CPU Assembly (page 6–47) r. A01 Display Assembly (page 6–49) s. A02 Backplane Assembly (page 6–55) Back-Up Battery (page 6–56) u. A10 High Speed Protocol Assembly (page 6–39) v. A09 Main Protocol Assembly (page 6–41) 3.
Page 307 Removal and Replacement o. EMI Shield (page 6–46) p. Com Bus, Board Supports, and PCAT Bus (page 6–45) q. A06 Front Panel Assembly and Menu Flex Circuit (page 6–35) r. Trim Ring, Menu Elastomer, Menu Buttons, and Front EMI Gaskets (page 6–30) s.
Page 308 Removal and Replacement 6–68 CTS 700-Series Service Manual...
Page 309 Troubleshooting This section contains information and procedures designed to help you isolate faulty modules in CTS 700-Series Test Sets. If a module needs to be replaced, follow the Removal and Replacement procedures beginning on page 6–9. CAUTION. The CTS operates over several ranges of line voltage (see Power Requirements on page 1–15 of Specifications).
Page 310 Troubleshooting Table 6–7: Modules Tested by Power-Up and Extended Diagnostics (Cont.) Module A11/A13 Tributary A12/A14 JAWA/JAWG Running Self Test This procedure uses internal routines to verify that the CTS passes its internal self tests. Equipment No test equipment or connections are required Required Prerequisites Power up the CTS and allow a twenty minute warm-up period before...
Page 311 Does the instrument If a problem still exists, return the instrument to power on and all the Tektronix factory service. Include a complete diagnostics description of the problem. pass? Set both switches of S2 on the CPU module to their open positions.
Page 312 Troubleshooting Pin 3 Pin 1 Pin 32 Figure 6–38: CPU Board Connector P1 6–72 CTS 700-Series Service Manual...
Page 313 Troubleshooting Use this procedure to troubleshoot the Backplane board. Press the ON/STBY button. Are the Does the voltages at U1–U4 ok Replace the instrument (see Table 6–8 and Backplane module. power up? Figure 6–40)? Disconnect P2 (between the Auxiliary Power and Low Voltage Power Supply modules).
Page 314 Troubleshooting Table 6–9: J7 Voltages Nominal Voltage Minimum Voltage Maximum Voltage –15 V –14.85 V –15.15 V –15 V –14.85 V –15.15 V –6.4 V –6.336 V –6.464 V +15 V +14.85 V +15.15 V +15 V +14.85 V +15.15 V +5.1 V +5.151 V +5.05 V...
Page 315 Troubleshooting This procedure helps you determine whether the Monitor or the Display module is bad. Replace the pins 2 and 4 of J440 Monitor have signals similar to assembly. Figure 6–42? the display legible but the horizontal and/or vertical sync do not look Power the instrument off and disconnect the cable from J440 on the...
Page 316 Troubleshooting J2 pin 2 (Horizontal Sync) 31.75 kHz Rate J2 pin 4 (Vertical Sync) 60 Hz Rate Figure 6–42: Horizontal and Vertical Sync Signals White Level J2 pin 7 (Video) Black Level Blanking Level Figure 6–43: A Video Signal with White, Black, and Blanking 6–76 CTS 700-Series Service Manual...
Page 317 Troubleshooting J440 Figure 6–44: Monitor Connector J440 J7 Pin 1 J4 Pin 1 Figure 6–45: Auxiliary Power Connectors J4 and J7 6–77 CTS 700-Series Service Manual...
Page 318 Troubleshooting J201 Pin 1 Figure 6–46: Display Connector J201 6–78 CTS 700-Series Service Manual...
Page 319 Troubleshooting Use this procedure when troubleshooting the CPU/Front Panel. Turn on the instrument. all LEDs the cable from the voltages Replace or come on, and the Processor to the reinstall on J101 match then most LEDs go off Front Panel good table 6–10? the cable.
Page 320 Troubleshooting J101 Pin 1 Figure 6–48: Front Panel Board Power Connector J101 Table 6–10: Front Panel Connector Voltages Connector Nominal Voltage J101 Pins 2 and 4 5.1 V 6–80 CTS 700-Series Service Manual...
Page 321 Troubleshooting Use this procedure to Are all troubleshoot a power supply secondary voltages overload problem. within specs shown in Replace the board or cable table 6–11 (when a specific that has the fault. board or cable is removed)? CAUTION: Turn the instrument power off before removing a board or disconnecting a cable.
Page 322 Troubleshooting Use this procedure to troubleshoot the Low Voltage Power Supply (LVPS). Is the principal power switch Press principal power switch (S1) in the on S1 to the on (in) position. (in) position? Press principal power switch S1 to the off (out) Disconnect the cable from J1 on Is line fuse position.
Page 323 Troubleshooting Perform the Are all Are all LVPS Remote secondary voltages secondary voltages Switch about 0 V within specs troubleshooting (see Table 6–11)? (see Table 6–11)? procedure. Press principal power switch S1 to off. Disconnect the cable from the LVPS to the Backplane. Leave the cable from the LVPS to the Main Protocol board attached.
Page 324 Troubleshooting J15 Pin 1 Figure 6–51: Main Protocol Board 6–84 CTS 700-Series Service Manual...
Page 325 Troubleshooting Use this procedure to troubleshoot the Low Voltage Power Supply Remote Switch. Verify that the Remote switch cable from the Low Voltage Power Supply to the Auxiliary Power board is connected. Verify that the primary power switch (S1) is in the ON position. Are all Are all Power Supply...
Page 326 Troubleshooting Shared Routines There are several routines that are shared by the diagnostic tests. Although you cannot invoke these shared routines individually, you might encounter error messages that originate with the shared routines. The following entries describe the shared routines. RAM Data Line Routine This general routine is used by various tests.
Page 327 Troubleshooting The individual test routines do not necessarily know whether or not a bus error occurred. The tests simply run to completion. The diagnostic control program checks if a bus error occurred at the completion of each test. Then, if a bus error did occur the Error Message described below is produced.
Page 328 Troubleshooting The following error message is produced if the digitized signal does not fall within the allowed tolerance range. All values are reported in mV. Min: X, Max: X, Act: X loopbackHwInit() Routine This routine places the protocol hardware in a quiescent state from which all loopback tests begin.
Page 329 Troubleshooting number of errors reported by the hardware. For failures/alarms this value is 1. For errors, however, the value is a count read from the hardware. <RATE_ID> <HW_STATUS>, Exp: 0xX, Act: 0xX Where <RATE_ID>: Elec 52Mb", Elec 155Mb", Elec 622 Mb", Opt 52Mb", Opt 155Mb", Opt 622 Mb", Elec 52Mb (c)", Elec 155Mb (c)", Elec 622Mb (c)",...
Page 330 Troubleshooting The following error message is produced if the tributary hardware load XILINX failed for either the DSn or En rate. Load XILINX failure, Exp: 0x0, Act: 0x1 protoInit() This routine is responsible for initializing both the tributary board and the protocol board.
Page 331 Troubleshooting To verify the ability of the test set to generate and receive a DSn/En pattern (PRBS23), the routine first programs the transmitter and receiver to the same pattern. It then verifies that pattern lock is present. Finally, the receiver is then programmed to a different pattern, and it then verifies that pattern lock is not present.
Page 332 Troubleshooting Test FAIL – diagTribTestSetFraming(): The following error message is produced if the hardware expected to see no alarms, but instead a DSn/En alarm is present. <FRAMING FORMAT>, <ALARM>, Exp: 0x0, Act: 0x01 Where <FRAMING FORMAT>: Unframed", Super Frame", Ext. Super Frame", C Bit", M13", PCM30", PCM31", PCM30 CRC", PCM31 CRC", Framed"...
Page 333 Troubleshooting The following error message is produced if the hardware expected to see a pattern lock, but no pattern lock was present. TX/RX Pat: PRBS23, Pat. Lock, Exp: 0x1, Act: 0x0 The following error message is produced if the hardware expected to see no pattern lock, but a pattern lock was present.
Page 334 Troubleshooting The following error message is produced if the hardware expected to see no alarms, but a DSn/En alarm is present. <LINE_CODING>, <ALARM>, Exp: 0x0, Act: 0x1 Where <LINE_CODING>: AMI", B8ZS", HDB3", B3ZS", CMI" Where <ALARM>: AIS", Yellow", Remote" The following error message is produced if the hardware expected to see no errors, but a DSn/En error is present.
Page 335 Troubleshooting To test the ability of the mapper/demapper to switch between active VT/TU channels, the routine programs the transmitter and receiver to the same active VT/TU channels. Then the test verifies that the mapper/demapper can transmit and detect VT/TU BIP errors. To verify that the mapper/demapper can generate background VT/TU patterns, the routine programs the active VT/TU channel to contain a PRBS23 pattern and the inactive VT/TU channel to a different pattern (QRSS or PRBS15).
Page 336 Troubleshooting The following error message is produced if the hardware expected a specific VT/TU failure, but the failure was not present. <FAILURE>, Exp: 0x1, Act: 0x0 Where <FAILURE>: VT LOP", VT LOM" Test FAIL – diagTribMapDemapAlarms(): The following error message is produced if the hardware expected no VT/TU alarms, but instead a VT/TU alarm is present.
Page 337 Troubleshooting The following error message is produced if the hardware expected a pattern lock on either the active channel or background channel, but no pattern lock was present. <CHANNEL>, Pattern Lock, Exp: 0x1, Act: 0x0 Where <CHANNEL>: Act Ch.", Bckgnd Ch." Test FAIL –...
Page 338 Troubleshooting The routine tests the ability of the tributary hardware to generate and receive VT/TU and DSn/En alarms, errors, and failures. Error Messages. Potential error messages are as follows: Test FAIL – diagTribRing(): The following error message is produced if the hardware expected a pattern lock, but instead no pattern lock was present.
Page 339 Troubleshooting The following error message is produced if the hardware expected a VT/TU Yellow alarm, but the alarm was not present. VT Yellow, Exp: 0x1, Act: 0x0 The following error message is produced if the number of VT/TU BIP errors inserted does not equal the number of VT/TU BIP errors detected.
Page 340 Troubleshooting Table 6–12: Diagnostic Test Summary (Cont.) Test Group Tests Tributary Trib Register Access Trib DS1 Map/Demap Trib E1 Line Interface Trib Flash Voltage Trib DS3 Map/Demap (External) Trib Flash Checksum Trib DS1 Ring Trib E3 Line Interface Trib DS1 Test Set Trib DS3 Ring (External) Trib DS3 Test Set...
Page 341 Troubleshooting Self Test The Self Test group refers to the suite of tests that are invoked as part of the power-up process. These test routines are designed to verify the maximum amount of hardware in the minimum amount of time. The group provides thorough coverage of the hardware, but offers very little in the way of fault isolation.
Page 342 Troubleshooting Table 6–13: Self Test Summary (Cont.) Test Name Test Number Board (FRU) O/E Int 52Mb Loop Plug-In Interface Module O/E Int 155Mb Loop Plug-In Interface Module O/E Int 622Mb Loop Plug-In Interface Module Trib Flash Voltage Tributary Trib Flash Checksum Tributary Trib Map/Demap E4 Tributary...
Page 343 Troubleshooting Table 6–14: System Internal Diagnostic Test Summary (Cont.) Test Name Test Number Board (FRU) Display RAMDAC Display Board Disk PM110 Reg Disk Drive Disk PM110 Cache RAM Disk Drive Disk PM110 Counter Disk Drive Disk Controller Disk Drive Disk Drive Disk Drive Proto Misc Reg Protocol Board...
Page 344 Troubleshooting Table 6–14: System Internal Diagnostic Test Summary (Cont.) Test Name Test Number Board (FRU) Trib TestSet DS3 Tributary Trib TestSet E1 Tributary Trib TestSet E3 Tributary Trib Line Int DS1 Tributary Trib Line Int DS3 Tributary Trib Line Int E1 Tributary Trib Line Int E3 Tributary...
Page 345 Troubleshooting Table 6–14: System Internal Diagnostic Test Summary (Cont.) Test Name Test Number Board (FRU) JAWG Jitter Loop Low-Pass Filter JAWA/JAWG JAWG Wander Loop Locking JAWA/JAWG JAWG Jitter Loop Locking JAWA/JAWG JAWG Jitter Generation JAWA/JAWG GPIB Command. DIAG:SELECT SYSINTERNAL Error Messages. See the individual test descriptions for the explanation of possible failures.
Page 346 Troubleshooting Table 6–15: System External Diagnostic Test Summary (Cont.) Test Name Test Number Board (FRU) Disk Drive Disk Drive Proto Misc Reg Protocol Board Proto SETI Reg Protocol Board Proto Reg Access Protocol Board Proto Flash Voltage Protocol Board Proto Flash Chksum Protocol Board Proto ITX RAM Protocol Board...
Page 347 Troubleshooting Table 6–15: System External Diagnostic Test Summary (Cont.) Test Name Test Number Board (FRU) Trib Line Ext DS3 Tributary Trib Line Ext E1 Tributary Trib Line Ext E3 Tributary Trib Line Ext E4 Tributary Trib Line Int DS1 Tributary Trib Line Int DS3 Tributary Trib Line Int E1...
Page 348 Troubleshooting Table 6–15: System External Diagnostic Test Summary (Cont.) Test Name Test Number Board (FRU) JAWA Analog Output JAWA/JAWG JAWG Jitter Loop Low-Pass Filter JAWA/JAWG JAWG Wander Loop Locking JAWA/JAWG JAWG Jitter Loop Locking JAWA/JAWG JAWG Jitter Generation JAWA/JAWG GPIB Command. DIAG:SELECT SYSEXTERNAL Error Messages.
Page 349 Troubleshooting The following error message is produced if the data pattern read back from the hardware differs from the pattern written. Addr: 0x9B0C02, Exp: 0xX, Act: 0xX Protocol: This test verifies the processor’s ability to access all of the Protocol board Register Access Test registers.
Page 350 Troubleshooting The following error message indicates the flash EEPROM programming voltage is enabled. Addr: 0x9B0000, Exp: 0x0, Act: 0x1 Protocol: This test verifies the integrity of the protocol board flash EEPROM device using Flash Checksum Test a standard checksum routine. The checksum routine used is a simple 16-bit summation.
Page 351 Troubleshooting Notes. The general RAM address line/data pattern routine is slightly modified due to how the memory is accessed. Instead of reading/writing to memory- mapped addresses the routine updates an auto-incrementing set of address counters internal to the IRX FPGA. Also, not all of the data lines are valid and therefore a mask value is required.
Page 352 Troubleshooting Test FAIL – Memory: The following error message is produced if the data read back from the FIFO does not match the expected value. The “Addr” field indicates which entry in the FIFO contained the failure. Addr: 0xXXXX, Exp: 0xXX, Act: 0xXX Protocol: This test verifies the functionality of the protocol A/D converter.
Page 353 Troubleshooting GPIB Command. DIAG:SELECT:ROUTINE PROTOLOOP155 Error Messages. For a description of the loopbackTest() routine and possible error messages, refer to loopbackTest(rate, type) Routine on page 6–88. Protocol: This test verifies the protocol hardware at the 622 MHz data rate. The test uses 622Mb Loop Test the Tx to Rx loopback path between the SETI and SERI components on the Protocol board.
Page 354 Troubleshooting Payload PLL Loss Failure, Exp: 0x09, Act: 0xXX Test FAIL – Payload Restore: The following error message is produced if the phase lock loops do not respond properly when attempting to restore lock on the payload offset. Payload PLL Restore Failure Exp: 0x39, Act: 0xXX Test FAIL –...
Page 355 Troubleshooting Refer to Plug-In Interface Module Status Test, on page 6–114, for more information. Error Messages. Potential error messages are as follows: Test FAIL: The following error message is produced if an unknown ID value is reported by the Plug-In Interface Module. The “Act” field contains the ID value read from the hardware.
Page 356 Troubleshooting Notes. Before proceeding with the remainder of the test, this routine first verifies that the Plug-In Interface Module is present by performing the O/E Status Test. Refer to Plug-In Interface Module Status Test, on page 6–114, for more information. This test will return PASS without performing the exercise if an electrical-only module is installed.
Page 357 Troubleshooting GPIB Command. DIAG:SELECT:ROUTINE INTLOOP52I Error Messages. For a description of the loopbackTest() routine and possible error messages, refer to loopbackTest(rate, type) Routine on page 6–88. Plug-In Interface Module: This test verifies the electrical and optical (if applicable) data paths at the Internal 155Mb Loop Test 155 MHz rate.
Page 358 Troubleshooting Error Messages. For a description of the loopbackTest() routine and possible error messages, refer to loopbackTest(rate, type) Routine on page 6–88. Plug-In Interface Module: This test verifies the electrical and optical (if applicable) data paths at the External 155Mb Loop Test 155 MHz rate.
Page 359 Troubleshooting GPIB Command. DIAG:SELECT:ROUTINE CPUINT Error Messages. Potential error messages are as follows: Test FAIL – Unexpected Interrupt: Interrupt Count Exp: 0x0, Act: 0xX This message is produced if an interrupt is detected prior to forcing the interrupt. The “Act” value indicates the number of times the interrupt occurred. Test FAIL –...
Page 360 Troubleshooting CPU: This test verifies the functionality of the clock/calendar IC. If the test is invoked Clock/Calendar Test as part of the Self Test suite, the routine simply performs an access verification. Otherwise, the test also verifies the chip’s 1 second interrupt. All communication with the clock/calendar chip is via the I C controller chip.
Page 361 Troubleshooting This error message is produced if the second output did not change state after monitoring for 5 seconds. The “Exp” value will either be 0 or 1 and the “Act” value will then be the opposite value. Test FAIL – Second Interrupt: Seconds Count, Exp: 0xXX, Act: 0xXX This error message is produced if the second interrupt failed to occur after a 5 second delay.
Page 362 Troubleshooting The first extended test is the interrupt verification. The test exercises the chip in local loopback mode and verifies the Tx interrupt. The interrupt handler for the Tx interrupt places the “txData” in the transmit register then shifts “txData” left by 1.
Page 363 Troubleshooting Each bit-plane is 1024x512 pixels (or 64 Kbytes). The graphics bit-plane uses this entire area, while the user interface planes only use the first 480 rows (or 60 Kbytes). The memory tests exercise only the portion of memory which is actually used.
Page 364 Troubleshooting GPIB Command. DIAG:SELECT:ROUTINE DISPGF Notes. Requires user interaction. Error Messages. None. Display: This test draws two solid boxes, one high–intensity box centered within a longer White Box Test medium intensity box. The test is useful for visually comparing the contrast in intensity levels.
Page 365 Troubleshooting GPIB Command. DIAG:SELECT:ROUTINE DISPSCROLL Notes. Requires user interaction. Error Messages. None. 6–125 CTS 700-Series Service Manual...
Page 366 Troubleshooting Front Panel General Notes The processor communicates with the front panel using the A Channel of the MC68681 DUART (located on the processor board). All diagnostics are done with the interrupts disabled. The software polls the hardware to determine the status of the transmitter/receiver when sending/receiving bytes.
Page 367 Troubleshooting The first byte after power-up reported by the front panel processor is the status of its internal self-test. The “Exp” field contains the expected status while the “Act” field contains the actual results. Test FAIL – Self-Test Communication: Front Panel Data Byte, Exp: 0xXX, Act: 0xXX If the front panel passes its internal self-test, the two processors will then attempt to verify the communication path by having the host processor send the following sequence of bytes to the front panel which simply echoes the...
Page 368 Troubleshooting The test exercises the set of front panel LEDs in the following order: YELLOW LEDs (Starting at top of the left column) RED LEDs (Starting at top of the left column) GREEN LEDs (Starting with status LEDs, then lighting top row of functions LEDs right to left) This test uses two separate front panel LED commands.
Page 369 Troubleshooting Refer to Front Panel General Notes on page 6–126 for a description of other possible failure modes relating to front panel communication. Error Messages. None. Disk: This test verifies the processor’s ability to access the internal registers of the PM110 Register Test PM110 ASIC by performing a walking 1’s exercise on various registers.
Page 370 Troubleshooting The following error message is produced if the terminal count status fails to go high after the counter expires. Addr: 0x980001, Exp: 0x0, Act: 0x0 Disk: This test initializes the DP8473 Floppy Disk Controller and verifies “No Errors” Controller Test were reported.
Page 371 Troubleshooting Disk: This test verifies the ability to properly format and label a disk. The test requires Format & Verify Test user interaction to insert a disk in the drive before invoking the test. GPIB Command. DIAG:SELECT:ROUTINE DISKFNV Notes. Requires user interaction. This test erases the contents of the disk.
Page 372 Troubleshooting Disk: This test requires a special Dysan disk (DDD 305–400 P/N 810244) to perform Dysan Seek Test the exercise. The test reads selected tracks using both heads to check for a specified pattern on the disk. If any of the tracks fail, the test fails. The test requires user interaction to insert the Dysan disk into the drive prior to invoking the test.
Page 373 Troubleshooting Tributary General Notes This section describes tests you can use to troubleshoot the tributary circuitry, For each test, this section gives a brief description of the test, its GPIB com- mand, and possible error messages. Tributary: This test checks for the flash ROM program voltage enabled. Trib Flash Voltage Test The voltage level of the program voltage is read through the status register and indicates when +12 V is applied to the flash ROM.
Page 374 Troubleshooting These tests are the basic building blocks of all tributary diagnostics. Therefore, if these tests fail then the rest of the tributary diagnostics will also fail. This routine calls the standard DSn test set tests to exercise the hardware. GPIB Command.
Page 375 Troubleshooting Notes. This test is destructive to the state of the tributary hardware and therefore re–initializes the Tributary board upon completion. Error Messages. Potential error messages are as follows: Test FAIL: The following error message is produced if the read/write portion of the routine fails.
Page 376 Troubleshooting Notes. None. Error Messages. See diagGroupLineInterface(Tributary Rate, Loopback), on page 6–93, for a list of possible error messages. Tributary: This test verifies the tributary hardware between the test set and line interface. DSn Line Interface This is accomplished by connecting the test set to the line interface through the configuration switch.
Page 377 Troubleshooting Tributary: This test verifies the ability of the tributary hardware to generate and receive VT DSn Mapper/Demapper failures, alarms, errors, background patterns, and background framing formats. This is accomplished by connecting the test set to the mapper/demapper through the configuration switch. The line interface is disconnected during this test. This routine calls the standard DSn mapper/demapper tests.
Page 378 Troubleshooting GPIB Command. DIAG:SELECT:ROUTINE TRIBDS1RING DIAG:SELECT:ROUTINE TRIBDS3RING Notes. None. Error Messages. See the diagTribRing(Tributary Rate), on page 6–97, for a list of possible error messages. Tributary: This test verifies the overall operation of the Tributary board by connecting all En Ring the major tributary hardware blocks (test set, mapper/demapper, and line interface) through the configuration switch.
Page 379 Troubleshooting Jitter/Wander General Notes This section describes tests you can use to troubleshoot the jitter/wander generation and measurement circuitry, For each test, this section gives a brief description of the test, its GPIB command, and possible error messages. JAWA: Clock Recovery This test verifies the operation of the JAWA clock recovery circuit.
Page 380 Troubleshooting The following error message is produced if the read/write portion of the test fails: Addr: <register address>, Exp: <value written>, Act: <value read> JAWA: Flash Memory This test verifies the JAWA EEPROM using a checksum algorithm. Checksum GPIB Command. DIAG:SELECT:ROUTINE JMEACKSUM Error Messages.
Page 381 Troubleshooting The following error message is produced if two computed frequencies do not match: freq diff<100kHz, Exp: 0x186a0, Act: <difference between computed frequencies> JAWA: Tracking PLL This test verifies the function of the tracking phase locked loop. GPIB Command. DIAG:SELECT:ROUTINE JMEATRL Error Messages.
Page 382 Troubleshooting JAWA: Measurement PLL This test verifies the function of the measurement phase locked loop. Locking GPIB Command. DIAG:SELECT:ROUTINE JMEAMPLOCK Error Messages. Potential error messages are as follows: Test FAIL: The following error message is produced if the loop does not lock: PLL can't lock, Exp: 0x0, Act: 0x1 JAWA: Measurement PLL This test verifies the function of the measurement phase locked loop.
Page 383 Troubleshooting JAWA: Analog Output This test verifies that the path between jitter generation and jitter measurement is working. GPIB Command. DIAG:SELECT:ROUTINE JMEAAOUT Error Messages. Potential error messages are as follows: Test FAIL: The following error message is produced if the analog output calibration fails: A out cal failed, Exp: 0x0, Act: 0x0 The following error message is produced if the proper frequency is not measured at the analog output:...
Page 384 Troubleshooting <data rate> <range> UI cal fail, Exp: 0x1, Act: 0x0 The following error message is produced if the loop does not lock: <data rate> <range> UI lock fail, Exp: 0x1, Act: 0x0 JAWG: Jitter Loop This test verifies the selectable low-pass filters in the jitter generator phase Low-Pass Filters locked loop.
Page 385 Troubleshooting Troubleshooting Sequence The Troubleshooting Sequence allows qualified technicians to determine which board in a CTS instrument to replace. You use the results of the CTS Diagnostics to make this determination. The troubleshooting sequence assumes that you are familiar with the CTS Diagnostic System and its use. The troubleshooting sequence is shown in Table 6–16 on page 6–146.
Page 386 Troubleshooting Table 6–16: Troubleshooting Sequence Step Diagnostic Test Results Procedure BUS FAULT @ 0X9B05XX OR 0X9B0AXX This combination of failures indicates that the +12 V or INTERNAL ERROR 1 (SYSTEM EVENT 6) –12 V power supply generated by the Backplane board NO OUTPUT FROM CPU RS232 PORT is faulty.
Page 387 Troubleshooting Table 6–16: Troubleshooting Sequence (Cont.) Step Diagnostic Test Results Procedure Internal error 1 (System Event 6) This fault is caused by the SETI chip on the High Speed Protocol board not being able to lock to the SETI_REFCLK clock signal. The fault can be caused by the following items (in order of probability): 1.
Page 388 Troubleshooting Table 6–16: Troubleshooting Sequence (Cont.) Step Diagnostic Test Results Procedure Plug-In Interface Module identification (42) fails This indicates a failure to read the O/E Identification Plug-In Interface Module access (43) fails Register and a failure to access the Plug-In Interface Module registers.
Page 389 Troubleshooting Table 6–16: Troubleshooting Sequence (Cont.) Step Diagnostic Test Results Procedure Any Display board diagnostics pass These failures indicate a problem with the physical disk Disk Drive diagnostics (14, 15, 16, or 17) pass drive. The fault can be caused by the following items (in Disk Drive diagnostics (18, 19, or 20) fail order of probability): 1.
Page 390 Troubleshooting Table 6–16: Troubleshooting Sequence (Cont.) Step Diagnostic Test Results Procedure FLASH voltage This indicates the FLASH programming voltage has been left enabled on the Display board. The fault can be caused by the following items (in order of probability): 1.
Page 391 Troubleshooting Table 6–16: Troubleshooting Sequence (Cont.) Step Diagnostic Test Results Procedure Protocol board 52, 155, 622 Mb/s loop (36, 37, and 38) passes This indicates one or more failures were detected when Plug-In Interface Module 52, 155, 622 Mb/s internal loop (46, 47, looping the Tx signal back to the Rx through external and 48) passes cables.
Page 392 Troubleshooting Table 6–16: Troubleshooting Sequence (Cont.) Step Diagnostic Test Results Procedure Protocol board 52, 155, 622 Mb/s loop (36, 37, or 38) fails This indicates the diagnostics tried to insert errors, but Does not fail with B1 and/or B2 errors detected but not inserted no errors were detected when looping the Tx signal back Does not fail with B3 errors detected when not inserted to the Rx on the High Speed Protocol board.
Page 393 Troubleshooting Table 6–16: Troubleshooting Sequence (Cont.) Step Diagnostic Test Results Procedure Protocol board 52, 155, 622 Mb/s loop (36, 37, or 38) fails This failure indicates that an LOS or LOF failure was Fails with LOS and/or LOF detected detected at some time during the diagnostic when it was not expected.
Page 394 Troubleshooting After running the System Internal diagnostics: O/E Int 155 Mb Loop Elec 155 Mb LOS Exp:0x0 Act:0x1 O/E Int 622 Mb Loop Opt 622 Mb LOS Exp:0x0 Act:0x1 The Internal diagnostic results are interpreted the same as the External diagnos- tics with the module name changed to O/E Int.
Page 395 Troubleshooting Troubleshooting Notes Bus Faults can occur during any diagnostic. These faults are characterized by the following message: BUS ERROR At Addr: 0xXXXXXX, (STTX Reg 3: 0xXX) If a message like the above appears in any diagnostic failure display, it should be treated as a bus fault and not as a failure by the specific diagnostic.
Page 396 Troubleshooting 6–156 CTS 700-Series Service Manual...
Page 397 After-Repair Adjustments After the removal and replacement of a module, some adjustment may be required. Table 6–17 lists the adjustments required. Table 6–17: Adjustments Required for Module Replaced Module Replaced Adjustment Required Display Assembly None required Backplane Assembly None required CPU Assembly Set the serial number, clock, and calendar Auxiliary Power Supply...
Page 398 After-Repair Adjustments 6–158 CTS 700-Series Service Manual...
Page 399 170 kg (375 pound) test strength. 2. If you are shipping the CTS to a Tektronix field office for repair, attach a tag to the CTS showing its owner and address, the name of the person to contact about the CTS, the CTS type, and the serial number.
Page 400 Repackaging Instructions 6–160 CTS 700-Series Service Manual...
Page 402 (CTS 710 only) Option 36 2, 34, 140 Mb/s Add/Drop/Test Option (CTS 750 only) In addition, the following items can be ordered by their nine-digit Tektronix part numbers: H Optical Connector Kit, part number 020–1885–XX H Tributary Signal Converter/Attenuator, part number 067–0250–XX For information about power cord options refer to Table 2–2, on page 2–2.
Page 403 Options 7–2 CTS 700-Series Service Manual...
Page 405 Electrical Parts List The modules that make up this instrument are often a combination of mechanical and electrical subparts. Therefore, all replaceable modules are listed in the Mechanical Parts List section. Refer to that section for part numbers when using this manual.
Page 406 Electrical Parts List 8–2 CTS 700-Series Service Manual...
Page 408 Diagrams This section contains an interconnect diagram and a block diagram for the CTS. Refer to Theory of Operation on page 3–1 for more information about the field-replaceable modules shown in the block diagram. 9–1 CTS 700-Series Service Manual...
Page 409 Diagrams Front Rear Panel Panel Knobs Buttons Buttons Connectors Connectors Tributary Signals Indicators A11/A13 A12/A14 2Mh/s Clock (Not used) Tributary JAWA/ Tributary Option JAWG Signals Jittered Clock J/Clk Out Tributary System Clock J/Clk In Signals Jittered clock out Analog Out ComBus SDH In Ext Clk In...
Page 410 Diagrams Bezel RS–232 Button Note 1 Battery Menu GPIB Switches IEEE STD 488 PORT P1 & P2 Front Display Panel J945 J301 J101 J915 To Knob Disk Drive Potentiometer J201 J490 Backplane RECEIVE, Elec Note 1 A04/A05 Protocol TRANSMIT, Elec Module High Speed Protocol...
Page 411 Diagrams 9–4 CTS 700-Series Service Manual...
Page 413 This section contains a list of the modules that are replaceable for the CTS. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available from or through your local Tektronix, Inc. service center or representative. Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements.
Page 414 Mechanical Parts List Using the Replaceable Parts List The tabular information in the parts list is arranged for quick retrieval. Under- standing the structure and features of the list will help you find all the informa- tion you need for ordering replacement parts. Item Names In the parts list, an Item Name is separated from the description by a colon (:).
Page 415 Mechanical Parts List CROSS INDEX – MFR. CODE NUMBER TO MANUFACTURER Mfr. Code Manufacturer Address City, State, Zip Code S3109 FELLER 72 VERONICA AVE UNIT 4 SUMMERSET NJ 08873 S3629 SCHURTER AG H 2015 SECOND STREET BERKLEY CA 94170 C/O PANEL COMPONENTS CORP S4246 JAPAN SERVO CO LTD 7 KANDA...
Page 416 PETALUMA CA 94952–1152 70674 ADC PRODUCTS DIV MAGNETC CONTROLS CO 71400 BUSSMANN DIVISION COOPER INDUSTRIES INC ST LOUIS MO 63178 PO BOX 14460 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR PO BOX 500 BEAVERTON OR 97077–0001 10–4 CTS 700-Series Service Manual...
Page 417 –3 200–3991–02 COVER,PANEL:HARD, POLYCARBONATE, LEXAN 80009 200399102 –4 334–8722–00 MARKER,IDENT:REAR COVER FUSE DATA 80009 334872200 W/ CE LABEL (ALL CTS 710) 334–8722–00 B040277 MARKER,IDENT:REAR COVER FUSE DATA 80009 334872200 W/ CE LABEL (ALL CTS 750) 334–9444–00 B040278 B059999 MARKER,IDENT:REAR COVER FUSE DATA, 0KB05 334–9444–00...
Page 418 Mechanical Parts List Figure 10–1: Cabinet and Rear Panel 10–6 CTS 700-Series Service Manual...
Page 419 Mechanical Parts List Fig. & Tektronix Serial No. Mfr. Index No. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10–2 –1 334–8633–00 MARKER,IDENT:BEZEL,CTS710 80009 334863300 334–8640–00 MARKER,IDENT:BEZEL,CTS750 80009 334864000 –2 354–0734–01 TRIM,RING:FRONT,WITH ACRYLIC CRT FILTER 80009 354073401 –3...
Page 420 Mechanical Parts List Fig. & Tektronix Serial No. Mfr. Index No. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. –16 119–4547–00 B010100 B030374 DISK DRIVE:FLOPPY,3.5 INCH;2MB,0.5 INH DSDD TK2248 119–4547–00 (CTS710 Only) B010100 B030224 (CTS750 Only) 119–5413–00...
Page 421 SPACER,POST:0.709 L,6–32 INT/EXT,SST,0.25 HEX0.475 L 0KB01 129–0851–00 –20 671–2826–52 CIRCUIT BD ASSY:HIGH SPEED PROTOCOL 80009 671282652 671–3572–51 B030375 CIRCUIT BD ASSY:HIGH SPEED PROTOCOL, (CTS 710 80009 671357251 ONLY) 671–3572–51 B030225 CIRCUIT BD ASSY:HIGH SPEED PROTOCOL, (CTS 750 80009 671357251 ONLY) –21...
Page 422 Mechanical Parts List Fig. & Tektronix Serial No. Mfr. Index No. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. –22 348–1552–00 GASKET,EMI:LONGITUDINAL GND STRIP,COPPER,3.906 TK2647 0097097617 CUT TO INCHES L,CLIP ON 3.906 L –23 131–1247–00 TERM,QIK DISC.:0.187 X 0.02 BLADE,45 DEG BEND 00779 61664–1...
Page 423 Mechanical Parts List Figure 10–3: CRT and Mainframe 10–11 CTS 700-Series Service Manual...
Page 424 Mechanical Parts List Fig. & Tektronix Serial No. Mfr. Index No. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10–4 –1 200–3660–00 COVER,AUTO CAL:POLYCARBONATE TK1163 ORDER BY DESC –2 334–3003–00 MARKER,IDENT:MKD DANGER TK0860 ORDER BY DESC –3...
Page 425 Mechanical Parts List Figure 10–4: Circuit Boards 10–13 CTS 700-Series Service Manual...
Page 426 Fig. & Tektronix Serial No. Mfr. Index No. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10–5 CTS 710 CABLES –1 174–3044–00 CA ASSY,PWR:DESCRETE,;PSC,22,18 AWG,1X22 TK2469 174–3044–00 –2 174–2282–00 CA ASSY,SP:FLAT FLEX,;FLX,10,26 AWG,15.8 L TK2469 174–2282–00 –3...
Page 427 Mechanical Parts List Figure 10–5: CTS 710 Cables 10–15 CTS 700-Series Service Manual...
Page 428 Mechanical Parts List Figure 10–6: CTS 750 Cables 10–16 CTS 700-Series Service Manual...
Page 429 Mechanical Parts List Fig. & Tektronix Serial No. Mfr. Index No. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10–7 STANDARD ACCESSORIES –1 161–0230–XX CABLE ASSY,PWR,:3,18 AWG,92 L,SVT,TAN,60 DEG (STANDARD–SEE FIGURE 10–1–12) –2 161–0104–05 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5 METER,RTANG...
Page 430 Mechanical Parts List Figure 10–7: Power Cords 10–18 CTS 700-Series Service Manual...
Page 431 Glossary An acronym for Alarm Indication Signal. An AIS is used to alert down- stream equipment that an upstream failure has been detected. An acronym for Automatic Protection Switching. ASCII An acronym for American Standard Code for Information Interchange. An acronym for Bit Error Ratio (or Rate). The principal measure of quality of a digital transmission system.
Page 432 Glossary An acronym for Degraded Minute. A degraded minute is a minute with a BER greater than 1 E-6. An acronym for Digital Signal-n (DS1, DS2, and DS3). DS1 is the basic multiplex rate in North America. Digital Signal Transmission Rates Level Rate Multiple of DS1...
Page 433 Glossary Line The portion of a transmission line between two multiplexers. Line Alarm Indication Signal (AIS) A Line AIS is generated by Section Terminating Equipment upon loss of input signal or loss of frame. Line Far End Receive Failure (FERF) An indication returned to a transmitting LTE from the receiving LTE that a Line AIS or incoming line failure has been detected.
Page 434 Glossary An acronym for Out of Frame. Path The portion of a SONET/SDH transmission network between two terminal multiplexers. Path Overhead (POH) A set of bytes allocated within the information payload (SPEVC) to carry status and maintenance information between terminal equipment along the same path as the information.
Page 435 Glossary An acronym for Section Overhead. SONET An acronym for Synchronous Optical NETwork. An acronym for Synchronous Payload Envelope. An acronym for Section Terminating Equipment. STM-N An acronym for Synchronous Transport Module–N (STM-1, -4, -16). The different STM-N rates are listed in the following table. The table below also includes the ANSI (American National Standards Institute) designation for the equivalent SONET (Synchronous Optical NETwork) rates.
Page 436 Glossary SONET/SDH Signal Hierarchy SONET Designation Electrical Signal Optical Signal Data Rate (Mb/s) SDH Designation STS-1 OC-1 51.84 STS-3 OC-3 155.52 STM-1 STS-12 OC-12 622.08 STM-4 STS-48 OC-48 2488.32 STM-16 Tributary The lower rate signal input to a multiplexer for combination (multiplexing) with other low rate signals to form a higher rate signal.

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