Tektronix OI1125 Instruction Manual
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Tektronix OI1125 Instruction Manual

Tektronix OI1125 Instruction Manual

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Instruction Manual
OI1125 E/O Transmitter
071-1052-00
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 all safety summaries prior to
performing service.
www.tektronix.com

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Summary of Contents for Tektronix OI1125

  • Page 1 Instruction Manual OI1125 E/O Transmitter 071-1052-00 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 all safety summaries prior to performing service.
  • Page 2 Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077...
  • Page 3 Tektronix, shipping charges prepaid, and with a copy of customer proof of purchase. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.

  • Page 5: Table Of Contents

    ..... . OI1125 E/O Transmitter Test Record ......
  • Page 6 Table of Contents List of Figures Figure 1: OI1125 E/O Transmitter ......Figure 2: Basic functional test setup .
  • Page 7 ....Table 17: OI1125 E/O Transmitter test record ....

  • Page 8: Figure 1: Oi1125 E/O Transmitter

    Table of Contents OI1125 E/O Transmitter Instruction Manual...

  • Page 9: General Safety Summary

    Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation. OI1125 E/O Transmitter Instruction Manual...
  • Page 10 CAUTION indicates a hazard to property including the product. Symbols on the Product. The following symbols may appear on the product: Avoid Exposure- Laser Radiation CAUTION Protective Ground Refer to Manual (Earth) Terminal is Emitted from this Aperture OI1125 E/O Transmitter Instruction Manual...
  • Page 11 Preface This is the instruction manual for the OI1125 E/O Transmitter. This manual provides user information and performance verification procedures for the instrument. OI1125 E/O Transmitter Instruction Manual...

  • Page 12: Contacting Tektronix

    6:00 a.m. – 5:00 p.m. Pacific time This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices. viii...

  • Page 13: Getting Started

    Getting Started The OI1125 (Figure 1) is an electrical-to-optical transmitter that accepts serial electrical data from a BERT (Bit Error Rate Tester) at rates up to 12.5 Gb/s and outputs an equivalent high-speed serial optical signal. The OI1125 Transmitter requires a continuous-wave optical input from a polarization-maintaining laser source.

  • Page 14: Options

    Getting Started Options Table 1 lists the power cord options that are available for your OI1125 E/O Transmitter. Table 1: Power cord options Option Description European power cord UK power cord Australian power cord Swiss power cord Chinese power cord No power cord Table 2 lists the Tektronix service options.

  • Page 15: Standard Accessories

    Getting Started Standard Accessories Table 3 lists the standard accessories that come with the OI1125 E/O Transmitter. Table 3: Standard accessories Accessory Part number US power cord 161-0066-00 PMF optical cable, FC/APC-PM, narrow key 174-4664-00 Optical cable, FC/APC-FC/PC, 2 M...

  • Page 16: Installation

    Output power from the laser is Class IIIb, which can be harmful to your eyes. The wavelength output from the OI1125 internal laser is in the infrared band and is invisible to the human eye.
  • Page 17 Power on To power on the OI1125 E/O Transmitter, first verify that the front-panel Laser Enable keyswitch is in the OFF (locked) position and then push the rear-panel power rocker switch to toggle it on. All LEDs will light briefly as the instrument initializes.

  • Page 18: Functional Check

    Getting Started Functional Check To perform a functional check of the OI1125 E/O Transmitter, you must connect a setup as shown in Figure 2. This setup measures the optical output of the transmitter directly, requiring an oscilloscope or signal analyzer with optical input capabilities.

  • Page 19: Figure 3: Oscilloscope Display Of An Eye Pattern

    The internal laser source, coupled to the laser input port, is being modulated by the electrical data stream from the BERT. The modulated optical output signal is displayed on the oscilloscope. Figure 3: Oscilloscope display of an eye pattern OI1125 E/O Transmitter Instruction Manual...
  • Page 20 Getting Started OI1125 E/O Transmitter Instruction Manual...

  • Page 21: Operating Basics

    Operating Basics This section describes the connectors and controls on the front and rear panels of the OI1125. Figure 5 on page 11 and Figure 7 on page 14 illustrate the front and rear panels of the instrument. Handling Handle the OI1125 E/O Transmitter carefully at all times. The instrument contains sensitive optical and electrical components that can be damaged by physical shocks.

  • Page 22: Figure 4: Connecting A Fiber Optic Cable

    All OI1125 optical connectors are angled physical contact (APC) connectors for improved return-loss performance. A keyway on the connectors ensures that the angled connectors mate together correctly.

  • Page 23: Front Panel Connections And Controls

    SONET data stream or PRBS test pattern. When running high data-rate signals into this connector, use short, low-loss cables with high frequency connectors. Tektronix recommends the SMA cable that ships as a standard accessory with the transmitter for use with this connector.

  • Page 24: Figure 6: Oi1125 Front-Panel Controls

    Modulator Controls There are two controls in the modulator section on the front panel of the OI1125. The controls are described below. Extinction Ratio Adjust Enable. This momentary pushbutton switch allows you to switch between two modes of operation. When the switch is in the disabled mode, the enable LED is not lighted, and the calibrated extinction ratio setting is selected.
  • Page 25 When the Front Panel Unlock signal is set to a logic low, remote mode is locked active. The Remote Enable LED will flash momentarily if you push the Remote Enable switch when attempting to return to local mode. OI1125 E/O Transmitter Instruction Manual...

  • Page 26: Rear Panel Connections And Controls

    Operating Basics Rear Panel Connections and Controls There are three connectors and one switch on the rear panel of the OI1125 E/O Transmitter. Use Figure 7 and the following descriptions to connect the transmitter to your system. Figure 7: OI1125 rear panel...

  • Page 27: Using The Rear-Panel Remote Interface

    When the laser safety interlock is removed from the remote interface, an internal pull-up resistor on pin 2 forces the laser disable signal high, which deactivates the front-panel Laser Enable keyswitch. Figure 8: Laser safety interlock OI1125 E/O Transmitter Instruction Manual...

  • Page 28: Figure 9: Remote Interface Connector Pinout

    Modulator Input Not Detected Figure 9: Remote Interface connector pinout Table 5 lists the signal descriptions for the Remote Interface connector. Unless otherwise noted, the signals are active in both local and remote operating modes. OI1125 E/O Transmitter Instruction Manual...

  • Page 29: Table 5: Remote Interface Signals

    Laser Enable Digital This signal is high when the front-panel Laser Enable keyswitch is rotated clockwise to the Keyswitch On output On position, and low when the keyswitch is rotated counterclockwise to the Off position. OI1125 E/O Transmitter Instruction Manual...
  • Page 30 Operating Basics OI1125 E/O Transmitter Instruction Manual...

  • Page 31: Specifications

    Specifications This section contains the specifications of the OI1125 E/O Transmitter. All specifications are guaranteed unless labeled “typical”. Typical specifications are provided for your convenience but are not guaranteed. All specifications marked with the n symbol are guaranteed and have corresponding checks in the Performance Verification section on page 31.
  • Page 32 Each pin on the DB25 connector is protected with a 100 W series resistor Remote Port ESD Protection followed by protection diodes tied to ground and +5 V Power Supply 100 V to 240 V "10%, 50 to 60 Hz, t40 W; CAT II External AC levels OI1125 E/O Transmitter Instruction Manual...

  • Page 33: Table 7: Environmental Characteristics

    Specification Description (–55 _C to +75 _C) Temperature, nonoperating The environmental exposure is the procedure stated in Tektronix Design Standard 062-2847-00 for Class 6 equipment. 0 _C to +40 _C (32 _F to 104 _F) Temperature, operating This procedure conforms to the temperature portion of the test in MIL-T-28800E for Type III, Class 6 equipment, using the limits above.

  • Page 34: Table 8: Electromagnetic Compatibility (Emc)

    No loss of stored data, change to control settings, degradation of performance, or temporary loss of function will occur when the system is subjected to the transients as described below: Mode Peak Voltage Common 2 kV Differential 1 kV IEC 61000-4-5 OI1125 E/O Transmitter Instruction Manual...

  • Page 35: Laser Safety Label

    EXPOSURE TO BEAM MAXIMUM 20mW at 1550nm CLASS IIIb LASER PRODUCT CAUTION INVISIBLE LASER RADIATION DO NOT STARE INTO BEAM INSTRUMENTS CLASS 3A LASER PRODUCT MAXIMUM 20mW at 1550nm IEC 60825-1:1993+A1:1997 Figure 10: Laser warning label OI1125 E/O Transmitter Instruction Manual...
  • Page 36 Specifications OI1125 E/O Transmitter Instruction Manual...
  • Page 37 WARNING The following servicing instructions are for use only by qualified personnel. To avoid injury, do not perform any servicing other than that stated in the operating instructions unless you are qualified to do so. Refer to all safety summaries before performing any service.

  • Page 39: Theory Of Operation

    Power Control Internal Laser Out Figure 11: Transmitter interconnect diagram The OI1125 E/O Transmitter is made up of four interconnected assemblies: the front and rear panels, the main transmitter board, and the DC power supply. OI1125 E/O Transmitter Instruction Manual...
  • Page 40 The modulator requires that its input optical source has the correct orientation of its polarization to operate properly. OI1125 E/O Transmitter Instruction Manual...
  • Page 41 The DC power supply is a switching supply that converts the line voltage (100 – 240 VAC ±10%) to DC supply voltages that are used by the circuitry on the transmitter board. OI1125 E/O Transmitter Instruction Manual...
  • Page 42 Theory of Operation OI1125 E/O Transmitter Instruction Manual...

  • Page 43: Performance Verification

    Performance Verification Use the following procedures to verify the warranted specifications of the OI1125 E/O Transmitter. The recommended calibration interval is one year. These procedures test the specifications listed in Table 10. Some specifications, such as the modulator inputs, are checked indirectly in the eye pattern test matrix.

  • Page 44: Prerequisites

    PMF-style output connector 50 W, SMA male each end, ~1 m Cable, low-loss coax (2) Tektronix part number 015-0561-00 50 W, SMA male each end, 1 m Cable, coax Tektronix part number 174-1341-00 OI1125 E/O Transmitter Instruction Manual...

  • Page 45: Setup For Pv

    2. Install the laser safety interlock on the back of the instrument, or short pins 1 and 2 of the DB-25 remote port connector. (See Figure 9 on page 16.) OI1125 E/O Transmitter Instruction Manual...

  • Page 46: Internal Laser

    The Laser On LED and Laser Output Active LED both turn off. Laser On Power meter OI1125 Laser Output Optical in Optical cable Laser out Active LED (FC/PC) 174-4727-00 (FC/APC) Figure 12: Setup for the output power test OI1125 E/O Transmitter Instruction Manual...

  • Page 47: Figure 13: Setup For The Output Wavelength Test

    The Laser On LED and Laser Output Active LED both turn off. 8. Disconnect the cable from the wavelength meter. Laser On Wavelength meter OI1125 Laser Output Optical in Optical cable Laser out Active LED (FC/PC) 174-4727-00 (FC/APC) Figure 13: Setup for the output wavelength test OI1125 E/O Transmitter Instruction Manual...

  • Page 48: Modulator Checks

    0.25 V tests in OI1125 Clock Data Eye Pattern Matrix) Optical input Optical cable (FC/PC) 174-4727-00 Trigger Optical cable SMA cable Direct In 174-4664-00 015-0561-00 SMA cable 174-1341-00 Figure 14: Setup for the RMS Jitter test OI1125 E/O Transmitter Instruction Manual...
  • Page 49 6. Disable the crossing point adjust. 7. Set the trigger output to 1/32 clock. 8. Set the output mode to AC. 9. Turn the data output on, and set the data amplitude to 1.5 V p–p OI1125 E/O Transmitter Instruction Manual...

  • Page 50: Table 12: Signal Conditioning Mode Settings

    Table 12: Signal conditioning mode settings Data rate, Wavelength Filter field Bandwidth Gb/s field setting setting setting, GHz 2.488320 1550 OC-48 –––––––– 9.953280 1550 OC-192 –––––––– 12.500000 1550 None 12.50 6. Select the Horz tab to set the horizontal parameters. OI1125 E/O Transmitter Instruction Manual...
  • Page 51 Figure 15. 2. Align the rising edge of the waveform with the center of the oscilloscope graticules. 3. Reduce the vertical size of the histogram box as small as possible. OI1125 E/O Transmitter Instruction Manual...

  • Page 52: Figure 15: Rms Jitter Measurement

    BERT and repeat steps 1 through 6 for the 9.953 Gb/s bit rate. 8. Set the Filter field on the oscilloscope to None by using the procedure that begins with step 3 on page 38. OI1125 E/O Transmitter Instruction Manual...
  • Page 53 7. Turn the data output on, and set the data amplitude to 1.5 V p–p Oscilloscope. Set the TDS8000 settings as follows: NOTE. Due to differences in oscilloscope firmware, your setup steps may differ slightly. 1. From the toolbar, select Setup→Vertical. 2. Click the Optical>> button. OI1125 E/O Transmitter Instruction Manual...
  • Page 54 1. Set the BERT data and clock outputs on. 2. Enable the transmitter. 3. Turn on the channel that the optical module is plugged into. 4. Press Autoset. The oscilloscope displays an eye pattern as shown in Figure 16 on page 43. OI1125 E/O Transmitter Instruction Manual...

  • Page 55: Figure 16: Using An Eye Pattern To Check Modulator Polarity

    You have now completed Table 17 in the Test Record. The remainder of Table 17 lists the specification limits for the remaining tests in these performance verification procedures. Use the limits as a reference when filling out Tables 19 through 21 in the Test Record. OI1125 E/O Transmitter Instruction Manual...

  • Page 56: Modulator Optical Output Using The Internal Laser

    2. Set the pattern to PRBS–31. 3. Disable the adjustable duty cycle. 4. Set the mark ratio to 1/2. 5. Set the trigger to 1/32 clock. 6. Set the data amplitude to 1.5 V p–p OI1125 E/O Transmitter Instruction Manual...

  • Page 57: Table 13: Signal Conditioning Mode Settings

    3. Turn on the channel that the optical module is plugged into. 4. Press Autoset and then adjust the horizontal scaling to display an eye pattern. The oscilloscope displays an eye pattern as shown in Figure 17 on page 47. OI1125 E/O Transmitter Instruction Manual...

  • Page 58: Table 14: Measurement Function Menu Paths

    Table 14: Measurement function menu paths Generic name Parent menu name Measurement function Meas 1 NRZ Amplitude Extinction Ratio (dB) Meas 2 NRZ Timing Pk-Pk Jitter Meas 3 NRZ Amplitude Crossing % Meas 4 NRZ Amplitude Average Optical Power (dBm) OI1125 E/O Transmitter Instruction Manual...

  • Page 59: Figure 17: Measurements Taken From The Eye Pattern

    6. Press the Run/Stop button on the oscilloscope to begin a measurement. The oscilloscope displays an eye pattern as shown in Figure 17. Mask hits Measurement data Figure 17: Measurements taken from the eye pattern OI1125 E/O Transmitter Instruction Manual...
  • Page 60 Oscilloscope Setup on page 45. 6. Repeat steps 1 through 3 for the 9.953 Gb/s, 1.5 V row in Table 18. 7. Recall the 12.500 Gb/s data rate that you stored in the BERT. OI1125 E/O Transmitter Instruction Manual...
  • Page 61 14. Repeat steps 1 through 3 for the 12.50 Gb/s, 0.25 V row in Table 18. 15. Complete the remaining 0.25 V rows in Table 18, making sure to set the proper filter field on the oscilloscope for each row. 16. Keep the test setup connected for the next test. OI1125 E/O Transmitter Instruction Manual...

  • Page 62: Modulator Optical Output Using An External Laser

    2. Disconnect the optical cable from the internal laser out and the laser in connectors on the transmitter. Connect the external tunable laser to the laser in connector. 3. The equipment is now connected as shown in Figure 18 on page 51. OI1125 E/O Transmitter Instruction Manual...

  • Page 63: Figure 18: Setup For The Eye Pattern Test Matrix

    5. Set the trigger to 1/32 clock. 6. Set the data amplitude to 1.5 V p–p Tunable Laser. Set the tunable laser parameters as follows: 1. Set the wavelength to 1530 nm. 2. Set the amplitude to 5 dBm. OI1125 E/O Transmitter Instruction Manual...

  • Page 64: Table 15: Signal Conditioning Mode Settings

    2. Enable the tunable laser. 3. Enable the transmitter. 4. Turn on the channel that the optical module is plugged into. 5. Press Autoset. The oscilloscope displays an eye pattern as shown in Figure 19 on page 54. OI1125 E/O Transmitter Instruction Manual...

  • Page 65: Table 16: Measurement Function Menu Paths

    Generic name Parent menu name Measurement function name Meas 1 NRZ Amplitude Extinction Ratio (dB) Meas 2 NRZ Timing Pk-Pk Jitter Meas 3 NRZ Amplitude Crossing % Meas 4 NRZ Amplitude Average Optical Power (dBm) OI1125 E/O Transmitter Instruction Manual...

  • Page 66: Figure 19: Measurements Taken From The Eye Pattern

    6. Press the Run/Stop button on the oscilloscope to begin a measurement. The oscilloscope displays an eye pattern as shown in Figure 19. Mask hits Measurement data Figure 19: Measurements taken from the eye pattern OI1125 E/O Transmitter Instruction Manual...
  • Page 67 10. Repeat steps 1 through 4 for Table 21. 11. Disconnect the cable from the BERT output, and connect the 2X attenuator to the BERT output. Connect the cable to the attenuator. 12. Set the BERT amplitude to 0.5 V. OI1125 E/O Transmitter Instruction Manual...
  • Page 68 OC-192. 15. Repeat steps 1 through 4 for the 0.25 V rows in Table 19, after setting the filter field on the oscilloscope to OC-48. This completes the performance verification for the transmitter. OI1125 E/O Transmitter Instruction Manual...

  • Page 69: Oi1125 E/O Transmitter Test Record

    Performance Verification OI1125 E/O Transmitter Test Record Photocopy the following pages and use them to record the test results. Table 17: OI1125 E/O Transmitter test record Instrument Serial Number: Certificate Number: Temperature: Relative Humidity %: Date of Calibration: Technician: Performance Test...

  • Page 70: Table 18: Internal Laser @1550 Nm

    Power Jitter, p–p % Crossing Mask hit 1530 nm 5 dBm 1.5 V 0.25 V 10 dBm 1.5 V 0.25 V 1565 nm 5 dBm 1.5 V 0.25 V 10 dBm 1.5 V 0.25 V OI1125 E/O Transmitter Instruction Manual...

  • Page 71: Table 21: External Tunable Laser Input, Bert Input @12.50 Gb/S Bit Rate

    Power Jitter, p–p % Crossing Mask hit 1530 nm 5 dBm 1.5 V 0.25 V 10 dBm 1.5 V 0.25 V 1565 nm 5 dBm 1.5 V 0.25 V 10 dBm 1.5 V 0.25 V OI1125 E/O Transmitter Instruction Manual...
  • Page 72 Performance Verification OI1125 E/O Transmitter Instruction Manual...

  • Page 73: Maintenance

    Use only deionized water when cleaning the menu buttons or front-panel buttons. 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. OI1125 E/O Transmitter Instruction Manual...

  • Page 74: Cleaning Optical Connectors

    Use the following items to clean the optical connectors: H Cleaner tape dispenser (standard accessory included with the transmitter) H Canned compressed gas (Do not use compressed air from an in-house facility, as oil in the system may contaminate the connector.) OI1125 E/O Transmitter Instruction Manual...

  • Page 75: Figure 20: Cleaning An Optical Connector

    5. If you cannot use the cleaner tape dispenser, apply a short burst of com- pressed gas to the connector. 6. Carefully attach the connector to the instrument or cable, and check for proper operation. NOTE. Cleaning kits for optical connectors are available from a number of suppliers. OI1125 E/O Transmitter Instruction Manual...

  • Page 76: Repackaging Instructions

    H Type and serial number of the instrument. H Reason for returning. H A complete description of the service required. Mark the address of the Tektronix Service Center and the return address on the shipping carton in two prominent locations. OI1125 E/O Transmitter Instruction Manual...

  • Page 77: Replaceable Parts

    015–0561–00 CABLE,DLY,COAX:50 0GZV8 SF104PE,920MM,2X1 OHM,4NS,W/CONN,SMA,MALE,EACH END 1SMA–451 –6 015–1022–00 TERMINATOR,COAX:50 OHM, 0.5W,SMA 26805 2001–4401–00 –7 006–8217–00 CONN CLEANER:FIS CONNECTOR CLEANER 0CKD9 F1–7111 –8 131–7350–00 CONN,BOX:LASER SAFETY INTERLOCK FOR 131–7350–00 TRANSMITTER 071–1052–00 MANUAL,TECH:INSTRUCTION,E/O TK2548 071–1052–00 TRANSMITTER,OI1125 OI1125 E/O Transmitter Instruction Manual...

  • Page 78: Figure 22: Optional Accessories

    119–5116–00 ADAPTER,SC/APC:OPTICAL CONNECTOR,ASC–108 TK2491 ASC–108 –4 174–4725–00 CABLE ASSY,SP:FIBER OPTIC,P15 FIBER,DUAL TK2491 2L 2L–1P5–2M ENDED FC–APC/PM NARROW KEY, 2L 2L–1P5–2M –5 119–5888–00 ADAPTER,UCI:OPTICAL CONNECTOR,UNIVERSAL 80009 119–5880–00 CONNECTOR INTERFACE,ADT–UNI/ST,TOP160 ––– TVGF13 DUAL RACK MOUNT KIT 80009 OI1125 E/O Transmitter Instruction Manual...

  • Page 79: Figure 23: Optional Power Cords

    ORDER BY DESC METER,STR,IEC320,RCPT X 13A,FUSED UK PLUG(13A FUSE),UNI –3 161–0066–11 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5 80126 ORDER BY DESC METER,STR,IEC320,RCPT,AUSTRALIA –3 161–0304–00 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5 0B445 E13.900.098.A01 METER,STR,IEC320,RCPT,CHINA –4 161–0154–00 CA ASSY,PWR:3,1.0MM SQ,250V/10A,2.5 5F520 86515030 METER,STR,IEC320,RCPT,SWISS OI1125 E/O Transmitter Instruction Manual...
  • Page 80 CAMARILLO, CA 93012 TK2541 AMERICOR ELECTRONICS LTD UNIT–H ELK GROVE VILLAGE, IL 60007 2682 W COYLE AVE TK2548 XEROX CORPORATION 14181 SW MILLIKAN WAY BEAVERTON, OR 97005 TK6184 GOULD FIBER OPTICS 1121 BENFIELD RD MILLERSVILLE, MD 21108 OI1125 E/O Transmitter Instruction Manual...

  • Page 81: Glossary

    The maximum usable data rate for a given channel. Chirp Optical frequency chirp is a transient change in optical frequency (wave- length) when a laser or optical modulator is transitioned quickly between zero and one power levels. OI1125 E/O Transmitter Instruction Manual...
  • Page 82 WDM, which is a way to increase the capacity of fiber optic transmission systems through multiplexing up to 40 wavelengths of light. Deterministic jitter The difference between the maximum and minimum deviations from the expected timing positions of data after removing the random jitter. OI1125 E/O Transmitter Instruction Manual...
  • Page 83 These extra bits and/or coding tend to increase a serial data rate above the original non-FEC data stream in order to accommodate the extra information added by the FEC. OI1125 E/O Transmitter Instruction Manual...
  • Page 84 Any unwanted energy that interferes with a signal or measurement. No Return to Zero-When a digital data pattern that has zeroes as lows and ones as highs, does not return to zero when the pattern has consecutive ones. OI1125 E/O Transmitter Instruction Manual...
  • Page 85 Return to Zero-When a digital data pattern that has zeroes as lows and ones as highs, returns to zero when the pattern has consecutive ones. An abbreviation for receiver. Short wavelength The spectrum from 800 to 1000 nanometers. OI1125 E/O Transmitter Instruction Manual...
  • Page 86 Transmission system Facilities to transfer information from one location to another using copper conductors, fiber, or microwave radio. Tunable Laser A laser that has a variable wavelength and power output level. An abbreviation for transmitter OI1125 E/O Transmitter Instruction Manual...
  • Page 87 70 Local operation, 15 dBm, 70 Long wavelength, 72 Decibel, 70 LOS, 72 Demodulation, 70 Deterministic jitter, 70 DFB laser, 70 Digital signal, 71 Digital transmission system, 71 Mach-Zehnder Interferometer, 72 Dispersion, 71 Modulation, 72 OI1125 E/O Transmitter Instruction Manual...
  • Page 88 PRBS, 73 Procedures, Inspection and Cleaning, 61–64 URL, Tektronix, viii Product support, contact information, viii Protocol, 73 Pulse modulation, 73 Ventilation, 4 Random jitter, 73 Rear Panel Connections and Controls, 14 Web site address, Tektronix, viii OI1125 E/O Transmitter Instruction Manual...

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