Page 1 411-2051-500 Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08 Draft 00.01 November 1999 DRAFT...
Page 3 The information contained herein is the property of Nortel Networks and is strictly confidential. Except as expressly authorized in writing by Nortel Networks, the holder shall keep all information contained herein confidential, shall disclose it only to its employees with a need to know, and shall protect it, in whole or in part, from disclosure and dissemination to third parties with the same degree of care it uses to protect its own confidential information, but with no less than reasonable care.
Page 5 Nortel Networks Confidential Publication history October 1999 Draft 00.01. Draft issue of document for internal review. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 6 Publication history Nortel Networks Confidential 411-2051-500 Draft 00.01 November 1999...
Page 7: Table Of Contents
Transmit Receive Unit (TRU) and Multi-Channel Power Amplifier (MCPA) 2-3 High Stability Master Oscillator (HSMO) 2-3 Alarm Control Unit (ACU) 2-3 Transmit path insertion loss 2-3 Other equipment 2-3 Transmission facilities 2-3 Microwave 2-4 Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 8 Building service 2-8 Security 2-8 Manuals and records 2-9 Schedule for periodic cell site maintenance 2-9 DualMode 800 Enclosure Maintenance Reference Chart 2-10 DualMode 800 Enclosure Every Visit Checklist 2-13 DualMode 800 Enclosure MONTHLY Checklist 2-14 DualMode 800 Enclosure QUARTERLY Checklist 2-15...
Page 9 Performing tests using the DCSM in the directed mode 9-2 Monitoring functions 9-2 Posting the DCSM 9-4 Control Channel tests 9-4 MTX CTT tests 9-9 ICRM tests 10-1 DRU tests 11-1 Introduction 11-1 Functionality of the DRU 11-3 Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 10 Contents Nortel Networks Confidential Audio sensitivity of the TRU 11-3 Test considerations 11-4 Test equipment required 11-5 TRU self test 11-5 DRU configurations for analog tests 11-6 Nominal Application Gain 11-6 TRU setup 11-7 DRU transmit tests 11-12 Service impacts 11-12...
Page 11 General rules for replacing a TRU or an MCPA module 12-7 Replacing the TRU 12-7 Replacing the MCPA module 12-8 Returning a faulty unit to your Nortel Networks CSO office 12-9 Appendix A: Frequency table System's channel and frequency 1...
Page 12 Figure 11-6 RSSI offset setup 11-29 Figure 11-7 Transmit RF output power test setup 11-39 Figure 11-8 Transmit power level of a DualMode 800 Enclosure with 24-channel per cell/sector using two MCPA modules 11-41 Figure 11-9 Digital loopback paths 11-43...
Page 13: About This Document
Nortel Networks Confidential xiii About this document This publication is one of a set of documents that provide Nortel Networks customers with information and suggestions on the planning, operations and maintenance of their TDMA 800 MHz Universal Enclosure system. This set...
Page 14: Organization Of This Document
About this document Nortel Networks Confidential for the cell site technician to assist in troubleshooting and performing routine work. The document suite assumes that the reader has a basic knowledge of cellular systems and radio propagation and is familiar with measurement units and terms associated with these concepts.
Page 15: Equipment Operation
Nortel Networks Confidential Equipment operation In a DualMode 800 Enclosure, you can communicate with the Alarm Control Unit (ACU), the Transmit Receive Unit (TRU) and the Multi-Channel Power Amplifier (MCPA) by the use of an interface terminal or a computer. You can use the handset on the DualMode Cell Site Monitor (DCSM) to program the mobile unit and perform call through test.
Page 16 1-2 Equipment operation Nortel Networks Confidential Figure 1-1 ACU Initial screen display You can choose one of the four primary options at the first level: • Input • Output • General • Analog Ins (not used) Each option consists of up to three lines on the screen. Figure 1-2 shows the structure of these options.
Page 17: Selecting An Option
The options on the second line will change accordingly as the cursor moves. 2. Press the down arrow key to move the cursor to the second line. The cursor will highlight the first option on the second line. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 18: Input Option
1-4 Equipment operation Nortel Networks Confidential 3. On the second line, press the right arrow key to move the cursor to the Enable Single option. The options on the third line will change accordingly as the cursor moves. 4. Press the down arrow key to move the cursor to the third line. The cursor will highlight the first option on the third line.
Page 19 The alarm input point has been disabled either from the MTX or the terminal and is currently not detecting an alarm. • Enable/Inactive The alarm input point has been enabled and is currently not detecting an alarm. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 20: Output Option
1-6 Equipment operation Nortel Networks Confidential • Disable/Active The alarm input point has been disabled. It is currently detecting an alarm which, because it is disabled, will not be reported to the MTX. • Enable/Active The alarm input point has been enabled. It is currently detecting an alarm that has been reported to the MTX.
Page 21 You can monitor the status of the output contacts continuously because the terminal updates the display with an opened or closed output contact. After you leave the Monitor function, the data will still be displayed until you press the RETURN key. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 22: General Option
1-8 Equipment operation Nortel Networks Confidential Open Single The Open Single function opens output contact points one at a time. Setting an output contact point to Open disables that output point. Close Single The Close Single function closes output contact points one at a time. Setting an output contact point to Closed enables that contact point.
Page 23: Dualmode Cell Site Monitor (Dcsm)
On a successful self-test, the display shows the SELFTST PASS message. The DCSM is in stand-alone mode after the self-test. The display shows that the mobile unit is on and is ready for originating and answering calls. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 24: Stand-Alone Mode Operation
1-10 Equipment operation Nortel Networks Confidential Stand-alone mode operation In stand-alone mode you can use the handset on the front panel of the DCSM to originate and answer calls. The mobile unit functions in the same way as a subscriber mobile telephone in the cellular system.
Page 25 One-Touch Dial keys Numbers stored in either of these keys can be (M1 and M2) dialed by simply pressing the appropriate key. FCN (Function) key When used with other keys, personalizes your phone. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 26: Programming The Mobile
1-12 Equipment operation Nortel Networks Confidential Programming the mobile To activate the Hughes M6200 mobile, you need to program: • the four Numerical Assignment Modules (NAMs) • Due to NAM4's scanning control of paging channels, it must be programmed when the M6200 mobile is used in the DCSM.
Page 27 NAM that you have selected. After changing one parameter, you may edit another one by pressing an arrow key to scroll to the parameter. Press the STO key when you are done with the selected NAM. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 28 1-14 Equipment operation Nortel Networks Confidential Use the arrow key to scroll to the Area Code display. Enter your three digit area code. Use the arrow key to scroll to the Phone Number display. Enter your seven digit phone number.
Page 29 (1 to 21 channels). For NAM4 only: Use the arrow key to scroll to 1STCHA1 display. Enter the A side primary control channel (IS-54B and IS-136.2 default 333). Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 30 1-16 Equipment operation Nortel Networks Confidential Repeat this step for: 1STCHA2 A side secondary control channel (708*) 1STCHB1 B side primary control channel (334 *) 1STCHB2 B side secondary control channel (737*) * IS54B and IS-136.2 defaults Note: These fields define the control channels the DCSM is to use.
Page 31 NAM again without entering the correct Unlock Code or Security Code. Note: Nortel Networks recommends that unless under management directive, the Unlock and Security codes not be changed from their defaults. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 32 1-18 Equipment operation Nortel Networks Confidential Use the arrow key to scroll to the Security Code (SecCode) display. Enter your six digit Security Code. The factory default is 000000. Use the arrow key to scroll to the Digital Indicator display (Dig Ind).
Page 33 NAM's non-volatile memory when the self-test is completed. NAM 4 must be programmed as well if only one telephone number is assigned to the DCSM. Nortel Networks recommends that you also load the three remaining NAMs (NAMs 2,3 and 4) with the same information to prevent from inadvertently selecting a vacant NAM.
Page 34 1-20 Equipment operation Nortel Networks Confidential Programming the system selection When all the NAMs have been programmed, enter the system selection for the DCSM in your service area. Press the FCN key and then the 1 key. Use the arrow key to scroll through the system selection options. When the system of your service area appears (consistent with your Primary First Paging Channel, 1STCHP1, in NAM4), stop scrolling.
Page 35: Operating The Mobile
Enter the telephone number you want to call and press the SND key. Ending a call Press the END key to end a call. Note: Returning the handset to the hang up cradle without pressing the END key will not end a call. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 36: Transmit Receive Unit (Tru)
1-22 Equipment operation Nortel Networks Confidential Transmit Receive Unit (TRU) The Transmit Receive Unit (TRU) provides two methods for accessing the Operation, Administration, and Maintenance (OA&M) functionality, the front panel display interface and the AMPS/TDMA Terminal Interface. The front panel display provides operating parameters and status information; the Terminal Interface acts as a user-friendly interface to TRU command, control, and monitoring functions.
Page 37 TRU. The bottom three LEDs show the personality status of the TRU. Figure 1-7 Front panel layout of the TRU3 Status LEDs RS-232 port for the Terminal Interface connector Handle Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 38 1-24 Equipment operation Nortel Networks Confidential Table 1-1 shows the various transitions in LED state that may be observed during operation. Table 1-1 Transitions in the TRU3 LED state State Status Description/Action LOS FAIL CCH LCR Flash Flash Flash Flash Flash Flash LEDs flash on and off for approximately Power-up 1 second, then radio goes to state 2.
Page 39 SWERRs, do not cause the yellow LED to turn on directly. However, if the ICP chooses to close the signalling connection to the radio, the yellow LED will be activated indirectly and further Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 40: The Terminal Interface
1-26 Equipment operation Nortel Networks Confidential troubleshooting will be required to isolate the exact cause of the loss of service. Note 2: In general, the TX LED is off (radio taken off-the-air) when the radio is in the loss-of-service or radio-failure states. The only exception is when the radio is operating in the fractional DCCH (2T+C) state and there is a loss of connection to the DSPM.
Page 41 The terminal will display the following: For the TRU 2: TRU Terminal Interface (C) Copyright 1990-1996 Bell Northern Research, Inc. > For the TRU3: TRU-III Terminal Interface (C) Copyright 1996-97 Nortel > Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 42 1-28 Equipment operation Nortel Networks Confidential To enter the fullscreen mode, at the command line prompt (>), type in the commands: >SET LT OFF >SET FS ON The SET LT OFF command disables the LAPD timeout. If the TRU detects loss of the LAPD link, it resets itself after 10-12 seconds.
Page 43 I) Tone Gen P) Detect DVCC,RSSI X) Exit E) Set TXPOWIDX J) Loopback Q) Detect ALL RSSI Y) Restart TRU -------------------------------------------------------------------------------- Screen Refresh completed. > Command prompt Output message Command menu DRU status Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 44 1-30 Equipment operation Nortel Networks Confidential Figure 1-9 Fullscreen display for the TRU3 AMPS Mode ---------TRU TERMINAL INTERFACE (C)1996,1997 Northern Telecom, Inc.----------- Load: TRU31W40 Boot: BDRUAA01 CRC: Passed HW Ver: rq1 S/N: 530d8d0a PA FW: -------- PA HW: 5765 PA PEC: nthx51aa...
Page 45: Fullscreen Commands
Detect DVCC/RSSI Detect ALL RSSI Detect ALL RSSI Set Rx/Tx Audio — Test TRU Display Test TRU Display Set Audio Sens Standalone TX Set TXPOWSTEP Set TXPOWSTEP Exit Exit Restart TRU Restart TRU Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 46 1-32 Equipment operation Nortel Networks Confidential A complete description of the fullscreen commands is given in Table 1-3. This table is broken into five groups according to the functions of the commands: • Configuration functions for TRU operating parameters •...
Page 47 TRU has maximum output power when power level is set at “0” (no attenuation). The status is shown in the Power Level or TxPwrIndex field. Note: Nortel Networks recommends that you set the power level at “0” unless otherwise specified as a site requirement. -1.0 dBm to...
Page 48 1-34 Equipment operation Nortel Networks Confidential Table 1-3 TRU Fullscreen commands (continued) Receive functions (available to both the AMPS and the TDMA modes): Code Command Status Action/Initial Value Set Antenna (1 or 2 or 3) Selects antenna ports to use on path A and B. The...
Page 49 Allows the TRU2 and TRU3 to transmit without using a single-channel PA (see PA type in Table 1-4). This is used for either low power testing or on low power cell sites. - End - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 50: Command Line Mode Commands
1-36 Equipment operation Nortel Networks Confidential Command line mode commands The Command line mode consists of three different sets of commands: • maintenance commands • measurement commands • test commands Command line mode maintenance commands Each function in the maintenance command suite may be used by an operator to aid in the diagnosis and repair of faults in the TRU.
Page 51 TRU (range: ± 100dB; 0.01 dB resolution). OM Simulation Run OMSIM omtype Any Pegs the occurrence of the specified OM. - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 52 1-38 Equipment operation Nortel Networks Confidential Table 1-4 Command line mode maintenance commands (continued) Name Terminal Personality Description Command Allowed PA On/Off Set PA on|off VCH, CCH, Turns the power amplifier (transmitter) on/off. or TTC PA LED On/Off Set PALED on/off Turns the fault indicator LED on MCPA module on or off.
Page 53 Turns on/off generation of transmitter test tone. Generation Control Tx Audio On/Off Set TXAUDIO on|off VCH Turns on (unmute) or off (mute) the transceiver audio output downstream (to the mobile). - End - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 54 MPA or PA Query MPAFW or The MPA/SCLPA firmware version number of Firmware Version PAFW the DRU being queried. Note: DualMode 800 Enclosure does not Number support MPA or SCLPA. Multicoupler Gain Query MCGAIN The multicoupler gain compensation in dBm for Settings each antenna on both receive paths.
Page 55 Query ST Indicates the ST status on the receive path. Uptime Counter Query UPTIME The time that the DRU has been operating since the last reset in days, hours, minutes. - End - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 56 1-42 Equipment operation Nortel Networks Confidential Command line mode test commands Testing ensures the proper working order of the DRU’s components. Each test result is sent to the ICP by request or regular audit. Testing can be initiated by entering the appropriate command from the ASCII terminal, by a message sent from the ICP, or by regular audits on the DRU.
Page 57: Multi-Channel Power Amplifier (Mcpa)
Multi-Channel Power Amplifier (MCPA) 1-43 Multi-Channel Power Amplifier (MCPA) During installation or expansion of a DualMode 800 Enclosure, you need to set the output power of the Multi-Channel Power Amplifier (MCPA) to the desired level of the cell/sector. You can use the MCPA software program (PEC NTFC07BC), provided with the MCPA, to set the output power.
Page 58 Nortel Networks Confidential 3. Turn on the power to the computer and the MCPA shelf. 4. Start the ‘Nortel gain’ program from the Start menu on the computer. The selection menu for the MCPA will pop out (see Figure 1-10). Select the 100W MCPA system.
Page 59 10. Choose ‘OK’. The number ’1’ or the number you entered should be displayed on the data column next to the CommAlarmBoard. 11. Close the Registry Editor. 12. Run the MCPA software again. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 60: Downloading The Mcpa Firmware To The Mcpa Shelf (If Required)
Use the following procedure if you need to download the firmware to the MCPA shelf: 1. Run the ‘Nortel gain’ program by performing Steps 1 to 5 of the procedure listed in the Running the MCPA software on the computer section.
Page 61: Setting The Mcpa Output Power
24 channels is 60 watts (24 channels x 2.5 watts). Note: You must use two MCPA modules to obtain a total output power of higher than 100 watts. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 62 To set the MCPA output power, use the following procedure: 1. Run the ‘Nortel gain’ program by performing Steps 1 to 5 of the procedure listed in the Running the MCPA software on the computer section. The power setting menu will pop out (see Figure 1-11).
Page 63: Periodic Maintenance
Referenced documents such as this manual will contain blank forms for recording specific test results. These forms should be copied as required and included with your records. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 64: Equipment In A Dualmode 800 Enclosure
2-2 Periodic maintenance Equipment in a DualMode 800 Enclosure Figure 2-1 shows the location of equipment in a DualMode 800 Enclosure. Figure 2-1 Equipment layout of a DualMode 800 Enclosure Bay 1 Bay 2 Bay 3 MCPA2 MCPA4 MCPA6 MCPA Shelf1...
Page 65: Transmit Receive Unit (Tru) And Multi-Channel Power Amplifier (Mcpa)
It is important that your facilities are in good condition, otherwise cell site performance might be compromised. See recommended maintenance intervals from the manufacturer for the specific equipment. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 66: Microwave
In addition to checking for and repairing any deterioration of the grounding system, you should also check to see that all new equipment installed at the site is grounded properly. (Refer to the DualMode 800 Enclosure Power and Ground Verification.)
Page 67: Bay Bonding
• transmission cables are grounded at both the top and the bottom of the tower, and at the enclosure entrance Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 68: Building Sheath, Fences And Other Equipment
2-6 Periodic maintenance Building sheath, fences and other equipment If the site has metal walls, roof or base, the metal components must be grounded. The cell site fence and any fuel tanks or other metal structures must be grounded as well. Check that grounding cables and clamps are secure. Antennas and tower Structure Detailed inspection of towers should be performed every one to three years by...
Page 69: Feed
Measure the reflected power from the antenna across the entire cellular band (receive and transmit) to check for hidden damage or deterioration of the antennas. Refer to Chapter 7, Antenna Tests, in this manual. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 70: Housekeeping
2-8 Periodic maintenance Housekeeping Heating/air conditioning Proper temperature is essential to the functioning of the enclosure. Check any alarms due to the environment, such as high or low temperature, every time you are at the site. Dust control Keep dust levels to a minimum by mopping the floor once a month, taking care not to get the equipment wet.
Page 71: Manuals And Records
1 yr 6 mo 6 mo 1 yr 6 mo 1 yr 6 mo 1 yr A cell site maintenance reference chart and preventive maintenance check lists are provided in the following pages. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 72: Dualmode 800 Enclosure Maintenance Reference Chart
2-10 Periodic maintenance DualMode 800 Enclosure Maintenance Reference Chart Every Monthly Quarterly Semi- Annual Comments Visit Annual Equipment Bays and Interface Module Fans/Breakers/Fuses • HSMO Tests Oscillator Power Level (Ch. 5) • Oscillator Frequency (Ch. 5) • TRU Receive Tests - Analog Receive Sensitivity (Ch.
Page 73 Bay Bonding • Cabling and Connections • Principle Ground Bar • Transmission Line Entrance • Outside Grounding Tower and Associated Structures • Building Sheath, Fences and other • Equipment - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 74 2-12 Periodic maintenance Every Monthly Quarterly Semi- Annual Comments Visit Annual Antennas and Tower Structure • Tower Lighting • Grounding • Paint • Feed • Antennas • Pressurized Transmission Lines • Site Performance Fringe Coverage • Handoff Checks • Antenna Sweep •...
Page 75: Dualmode 800 Enclosure Every Visit Checklist
Check that site gate locks are secure Clean up any debris around the site area Check that there are no overhead lines down Pressurized transmission lines to antenna Check the nitrogen tank pressure, manifold, and the dehydrator Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 76: Dualmode 800 Enclosure Monthly Checklist
2-14 Periodic maintenance DualMode 800 Enclosure MONTHLY Checklist ____________________________ ___________________________ Date: Performed by: Perform the EVERY VISIT routine checks Power - Battery Check the battery voltages and note any discrepancies. Check terminals, connectors for signs of moisture or corrosion Power - BCM...
Page 77: Dualmode 800 Enclosure Quarterly Checklist
Perform the MONTHLY routine checks Equipment bay Voltage and Polarity checks at Main Power Terminals Step 6 of Voltage Checks Test (See Chapter 4) Transmission facilities Perform noise and level checks on T-1 transmission facilities (optional) Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 78: Dualmode 800 Enclosure Semi-Annual Checklist
2-16 Periodic maintenance DualMode 800 Enclosure SEMI-ANNUAL Checklist ____________________________ ___________________________ Date: Performed by: Perform the EVERY VISIT routine checks Perform the MONTHLY routine checks Perform QUARTERLY routine checks 411-2051-500 Draft 00.01 November 1999...
Page 79: Dualmode 800 Enclosure Annual Checklist
Verify that the antenna feed cables are grounded at both ends Verify that the cables and clamps attaching the tower and waveguide bridge to the grounding system are secure - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 80 2-18 Periodic maintenance Verify that the cables and clamps connecting the guy wires to the grounding system are secure Verify that transmission cables are grounded at both the top and bottom of the tower, and the building entrance Buildings with metal walls, roof or base, all metal parts are grounded Site fence, fuel tank or other metal structures are grounded Check that grounding cables and clamps are secure Antennas and tower...
Page 81 If the building uses AC mains service from overhead poles, take a look at the drop and service entrance for obvious damaged insulation Ensure the necessary licenses are maintained - End - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 82 2-20 Periodic maintenance 411-2051-500 Draft 00.01 November 1999...
Page 83: Test Equipment And Precautions
Test equipment and precautions The DualMode 800 Enclosure is basically operated by the Digital Multiplex Switch - Mobile Telephone Exchange (DMS-MTX*). It can also be operated by a service personnel at the cell site through an interface terminal to perform some operational functions and tests.
Page 84 3-2 Test equipment and precautions – 9600 baud – 8 data bits – 1 stop bit – No parity – 80 columns – Auto wraparound – ANSI – VT100 emulation — Cable for connecting the Transmit Receive Unit (RJ45 Teledapt connector on the front panel of the TRU) to the Interface Terminal.
Page 85: Precautions
+45.0 dBm is approximately 32 watts • +33.0 dBm is approximately 2 watts • +30.0 dBm is approximately 1 watt • +27.0 dBm is approximately 1/2 watt • 0 dBm is approximately 0.001 watt (1 milliwatt) Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 86: Rf Radiation Hazard
3-4 Test equipment and precautions RF radiation hazard Radio Frequency (RF) radiation is hazardous to anyone working in the cell site. All RF cables should be connected properly and all unused RF ports should be terminated with an appropriate terminator. CAUTION RF radiation hazard Do NOT disconnect any RF cables when transmitters are on.
Page 87 Before handling static-sensitive equipment, personnel must discharge themselves of any static charge. The most effective method is the use of a grounded wrist strap combined with correctly installed ground static control Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 88 3-6 Test equipment and precautions mats at all work locations. The wrist strap must be permanently attached to the frame on the basis of one between two frames. Alternatively the straps may be connected on an as-required basis to the battery return (Ground) jack, where it is provided.
Page 89 For more information on ESD and its control, refer to the following documents: • Test Methods for Static Control Products (Huntsman & Yenni, 3M Company) • Protection and Handling of ESD-Sensitive Circuit Packs (Bell Canada, BCP069-8000-501) Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 90 3-8 Test equipment and precautions 411-2051-500 Draft 00.01 November 1999...
Page 91: Power-Up Procedure
Verify that the lugs have been installed correctly and, if terminated on aluminum busbars, have been treated with anti-oxidant. Verify that the minimum bending radius has not been exceeded on the power cables (see Table 4-1). Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 92: Voltage Checks
4-2 Power-up procedure Step Action Observation Verify that the breaker positions on the power Note: See Tables 5-12 to 5-4 for the RIP bay have been labeled and are cabled as breaker panel assignments. indicated on the labels. Verify that the equipment bays are bonded to the principle ground bar line-up feeder with a #6 AWG jumper.
Page 93 MCPA 3-1 MCPA 2-1 MCPA 1-1 TRU 7A TRU 4A TRU 1A TRU 8A TRU 5A TRU 2A TRU 9A TRU 6A TRU 3A ACU A — Not used ICRM A ACU BIAS — Not used CSU A DCSM — Not used —...
Page 94 4-4 Power-up procedure Step Action Observation Caution: Arrange these cables so there is Disconnect the power cables from the ACU, RMC, HSMO, DCSM, DRUM, ICRM, and TRU no chance of them shorting out on anything. shelves. Measure the resistance to ground on the Less than 0.5 Ohms following power plug pins: CE Frame...
Page 95: Master Oscillator Tests
±220 Hz. CAUTION The HSMO is adjusted at the factory for frequency accuracy. If the frequency test fails, do NOT adjust the unit, it must be replaced with a new serviceable one. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 96: Oscillator Power Level Test
5-2 Master Oscillator tests Oscillator power level test See Figure 5-1 for set-up. Step Action Observation Connect the communications monitor to the output port under test on the back of the master oscillator. Select the spectrum analyzer function and set to 4.8MHz. -1 dBm ±3 dB Measure the output of the master oscillator and record on the test form.
Page 97 EDIT SQLCH POWER MIC/ACC EXT MOD SINAD AUDIO DEMOD SCOPE VΩ 200W A P P L I E D 200 VDC IN/OUT 1KVDC/500V 2 AMPS IN/OUT AC MAX Communications Monitor (IFR 1600) Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 98: Oscillator Frequency Test Procedure Using Trus
5-4 Master Oscillator tests Oscillator frequency test procedure using TRUs This test is to be used to test frequency on TRUs: 1. Select and offline a TRU to use for the test. 2. Connect the interface terminal to the RS-232 port on the front panel of the TRU under test.
Page 99 EDIT SQLCH POWER MIC/ACC EXT MOD SINAD AUDIO DEMOD SCOPE VΩ 200W A P P L I E D 200 VDC IN/OUT 1KVDC/500V 2 AMPS IN/OUT AC MAX Communications Monitor (IFR 1600) Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 100 5-6 Master Oscillator tests 411-2051-500 Draft 00.01 November 1999...
Page 101: Antenna And Transmission Line Tests
The other DC tests serve as more of a record of the resistance of the shield and center conductor. They may indicate future grounding problems or identify a change in the antenna dipole condition (open, now shorted or in the opposite way). Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 102: Antenna Return Loss
6-2 Antenna and transmission line tests Step Action Observation Visually inspect the bonding of the The transmission line must be bonded at transmission line to the mast ground riser at both the top and bottom. A set of binoculars both the top and bottom of the tower. or a spotting telescope may be required to verify the upper bonding.
Page 103 Greater than or equal to 14.5 dB + (2 x TX line loss) Repeat the test for each antenna installed for the cell site. If the test fails, check the antenna matching, cables and connectors. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 104: Thruline Wattmeter Method (Antenna Return Loss)
6-4 Antenna and transmission line tests Thruline wattmeter method (Antenna return loss) This is a service affecting test using a Thruline Wattmeter. It can be used with transmit antennas only. Ensure that all transmitters are OFF before inserting the Thruline in the transmission path. Step Action Observation...
Page 105 Control Center to antenna is good on the transmit band, RTS the Cell Site. restore service by using the receive antenna until the transmit antenna is repaired. - End - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 106 6-6 Antenna and transmission line tests 411-2051-500 Draft 00.01 November 1999...
Page 107: Enhanced Receive Multicoupler (Ermc) Tests
(either A or B side). See Figure 7-1. Using a 50-ohm cable, connect the communications monitor T/R port to one of the splitter ports corresponding to the A or B path selected. See Figure 7-1. - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 108 Replace the antenna feed and splitter output cables and then inform the Control Center to RTS the Cell Site. - End - Note: If an irregularity in the ERMC gain exists, call Nortel Networks RF Engineering Support for assistance. 411-2051-500 Draft 00.01 November 1999...
Page 109 ERMC overall gain measurement test 7-3 Figure 7-1 RMC overall gain measurement test RMC Input Preselect Filter A Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 110: Ermc Gain Adjustment
7-4 Enhanced Receive Multicoupler (ERMC) tests ERMC gain adjustment This section refers to the RF Engineering Guidelines for 800 MHz Cellular Systems, 411-2131-007, specifically the Talk-in Talk-out (TITO) adjustment. Gain setting are factory preset to 16 dB but specific cell site requirements may differ.
Page 111: Tito Test Procedure
Set the TRU up to monitor the RSSI This turns on all antenna ports. measurements. See RSSI tests for set up in Chapter 11 of this manual. - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 112 - End - Note: If an imbalance exists, call Nortel Networks RF Engineering Support for assistance in re-balancing the ERMC output. Always ensure that the site is balanced for the worst case. The radio TX path must be equal to or stronger than the Talk-In path.
Page 113: Alarm Control Unit (Acu) Tests
Receiver Parity: ignore Parity: disabled Character Bits: 8 bits Interface: Scroll Key: VT100 Form Feed: line feed Control Characters: executed Local Echo: RTS-CTS Handshake: off 8 Bits Tx: space - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 114 8-2 Alarm Control Unit (ACU) tests Step Action Observation Press the RESET key on the ACU to activate The ACU Maintenance Screen as per the the Maintenance Screen on the terminal. following diagram Figure 8-1 will appear. Using the keyboard arrows, select the Input See Chapter 1, Equipment operation , for a and Monitor menu items on the screen.
Page 115 Alarm Control Unit test setup 8-3 Figure 8-2 shows the pin assignments of a typical alarm connector. Figure 8-2 Typical alarm connector (36-Pin) Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 116 8-4 Alarm Control Unit (ACU) tests 411-2051-500 Draft 00.01 November 1999...
Page 117: Performing Tests Using A Dcsm
Making a call verifies that the system is up and running. Stand-alone ACCH/DCCH selection When a partition is equipped with both an ACCH and a DCCH do the following: 1. select NAM 4 and enter the programming selection mode Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 118: Dcsm Auto Answer Facilities
DCSM will automatically answer the incoming call, but will not generate a tone, or loop the forward and reverse audio paths. Nortel Networks recommends that the MRLT, MRHT, MRLP and MRLR VCH tests be used for verifying the performance of analog voice channels.
Page 119 If the DCSM mobile does not successfully lock onto the CCH, a new unsolicited message is sent to the CM with a message type indicating the failure to synchronize. The goal is to revisit each CCH approximately every two minutes. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 120: Posting The Dcsm
9-4 Performing tests using a DCSM Posting the DCSM To use the DCSM to perform tests requires that the DCSM is in service (INSV) state. The DCSM can be posted before a test is initiated from the Maintenance and Administration (MAP) terminal (see Procedure 9-1). Procedure 9-1 Posting the DCSM Step...
Page 121 The DCSM is now ready to test the desired CCH. Note: For MTX04 monitoring only needs to be invoked to run the CCH power test. For earlier MTX releases, monitoring must be invoked for all CCH tests. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 122 9-6 Performing tests using a DCSM Measuring Forward Control Channel RF power The DCSM can be directed to take a Power measurement on the currently active CCH. Raw RSSI readings are returned from the DCSM and are translated into dBm at the CM. Procedure 9-3 is used to test the forward power.
Page 123 (Sector Designation), (ACCH, DCCH, or Both) Both = monitor both CCH types Example: MTX120 JUL04 12:12:30 1123 INFO Terminal Maintenance Event CELL 15 CTU 0 PRTN: Y EVENT: Unsol Wrong CCH REASON: CCH Number Wrong Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 124 9-8 Performing tests using a DCSM Querying ACCH OMT parameters The DCSM can also be queried for the latest ACCH OMT parameters (see Procedure 9-6). Procedure 9-6 Querying ACCH OMT parameters Step Action Observation Make sure that the ACCH and the DCSM have been posted and are in the INSV state as per the Control Channel Test Setup Procedure.
Page 125: Mtx Ctt Tests
MTX Audio Low Test and MTX Audio High Test (MALT/MAHT) This test does not require a DCSM. The MALT and MAHT test measures the following MTX trunk parameters: • far-to-near-loss • loop loss • loop noise Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 126 9-10 Performing tests using a DCSM The MALT and MAHT tests can be invoked in the following ways: • from a posted transceiver at the VCH MAP level • from the CTT level (the first available VCH is selected) • automatically using Table CTTSCHED (also selects first available VCH) The MALT and MAHT test use the TTT to inject a low and high level (the level and frequency is determined by the CTTPARMS tuple) audio tone...
Page 127 Then repeat the test to verify the failure. Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900, for more information of the fields in MTX303 Log. Below are the descriptions of the fields of MTX303 which give the actual measure results:...
Page 128 9-12 Performing tests using a DCSM Troubleshooting action If the test fails then it should be repeated for verification. Should the test still fail the following hardware components may be at fault: • the TRU • ICRM packs (the AX50s, AX47s, AX87s) •...
Page 129 See Figure 9-5. MTX will display them once the test is complete. If the results fails check to see if the CTTPARMS fields are correctly set.Then repeat the test to verify the failure. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 130 5.0 dB NOISE: 22 dBRN Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900, for more information of the fields in MTX303 Log. Below are the descriptions of the fields of MTX303 which give the actual measure results: - The Loop Loss measured in dB...
Page 131 Figure 9-7 MRLP Test Measurements RSSI Measured Tone transmitted DRU or BST RF path Network DCSM The DCSM measures the RSSI of the Near- to-far on-air link. The TTT measures the tone level Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 132 Q1PWR: Q2PWR: 2 dB Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900, for more information of the fields in MTX303 Log. Below are the descriptions of the fields of MTX302 which give the actual measure results: - The measured forward RF power in dBm...
Page 133 The test either passes or fails depending on the RSSI level returned is within the limits set by the MRLR tuple in Table CTTPARMS. Table CTTGROUP defines the RF power level which the DCSM should transmit on the reverse path. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 134 9-18 Performing tests using a DCSM Figure 9-9 MRLR Test Measurements Tone transmitted DRU or BST RF path Network DCSM RSSI measured The DUT measures the RSSI of the Far- The TTT measures to-near on-air link. the tone level How to invoke the MRLR test Before the test is run, the appropriate CTTPARMS tuple must be datafilled with the correct criteria.
Page 135 Q1PWR: Q2PWR: 2 dB Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900, for more information of the fields in MTX303 Log. Below are the descriptions of the fields of MTX302 which give the actual measure results: - The measured reverse RF level in dBm...
Page 136 9-20 Performing tests using a DCSM Invoking the DTRM test Now that the DCSM (scanning the DCCH of the partition) and the VCH are posted the Call Termination test may be performed: Procedure 9-12 Invoking the DTRM or MTRM tests Step Action Observation...
Page 137: Icrm Tests
There are no operational tests for the Integrated Cellular Remote Module (ICRM) at the cell site. If you want to check the operation of the ICRM, contact the operator at the MTX for assistance. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 138 10-2 ICRM tests 411-2051-500 Draft 00.01 November 1999...
Page 139: Dru Tests
The DualMode Radio Unit (DRU) is a cell site transceiver and power amplifier combination that operates in either a TDMA (digital) mode or in a conventional AMPS (analog) mode. For a DualMode 800 Enclosure, the DRU is packaged in two sub-modules, the Transmit Receive Unit (TRU) and the Multi-Channel Power Amplifier (MCPA) module.
Page 140 11-2 DRU tests Figure 11-1 Front panel layout of the TRU2 (NTAX98AA) Figure 11-2 Front panel layout of the TRU3 (NTAW99AA) Status LEDs RS-232 port for the Terminal Interface connector Handle 411-2051-500 Draft 00.01 November 1999...
Page 141: Functionality Of The Dru
TRU through a TCM B-channel. Depending on the mode, the AMPS or TDMA baseband signal generated by the TRU in a DualMode 800 Enclosure is modulated in the TRU. The modulated signal is then sent to the MCPA. The MCPA amplifies and transmits the signal to the mobile in the appropriate AMPS (analog) or π/4...
Page 142: Test Considerations
This manual outlines the tests that should be performed on a DualMode Radio Unit (DRU) when it is installed or replaced. It describes tests that can be performed on the DRU, although not required, in a DualMode 800 Enclosure. Also described are system checks related to a complete cell site system containing DRUs.
Page 143: Test Equipment Required
TRU2 and a CRC check for a TRU3). Use the following procedure to perform the self test: 1. Connect the interface terminal to the RS-232 port on the front panel of the TRU under test. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 144: Dru Configurations For Analog Tests
This section covers the general test set-ups for the TRU. Nominal Application Gain In a DualMode 800 Enclosure, all TRUs are set to “patype none” mode during installation. In this mode, the nominal application gain is set to a default value of -12 dB and the TRU maximum transmit power is set to a default value of +15 dBm.
Page 145: Tru Setup
The Compandor field on the screen should show: Compandor: on SAT Transmit If the SAT TX is on, turn it off by entering: >G The SAT TX field on the screen should show: SAT TX: 6000 (off) Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 146 11-8 DRU tests Table 11-1 DRU configurations for analog tests 411-2051-500 Draft 00.01 November 1999...
Page 147 (first number indicates antenna port in path A and second number indicates antenna port in path B): >1 4 The Antenna Port field on the screen should show: >Antenna Port A: 1 B: 4 Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 148 11-10 DRU tests Transmit Power Level Index If the TxPwrIndex status is not 0, set it to 0 by entering: >E The TRU will request a specific power level (0..7). To set power level to 0, enter: >0 The TxPwrIndex field on the screen should show: TxPwrIndex: 0 Transmit Power Step Size If the TxPwrStep status is not 4, set it to 4 by entering:...
Page 149 The DRU will respond as follows: Enter TX or RX and a decimal dBm value (TX:-28... -10);(RX:-28...-16) Enter: >RX -18.0 The Audio Sens RX status on the screen will show: Audio Sens Rx: -18.0 Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 150: Dru Transmit Tests
11-12 DRU tests DRU transmit tests This section describes the transmit tests that can be performed on the DualMode Radio Unit (DRU). RF output power tests are described in the DRU RF output power test section. Note: The tests can be performed separately but the DRU transmit test setup procedure must be performed before each individual test.
Page 151 TRU under test. 6. Turn on the TRU (the transmit carrier) with the C command. >C The PA status on the screen will change to: PA: on 7. Proceed with the transmit tests. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 152 11-14 DRU tests Figure 11-4 DRU transmit tests setup (service affecting) Diversity Receive Main Receive Multicoupler Other TRU Transmit / Receive Preselect Shelves Splitter Filter Duplexer RX Bandpass Filter Receive Multicoupler Other TRU Preselect Shelves Splitter TX Bandpass Sniffer Filter Filter TRU Shelf TRU 1...
Page 153: Transmit Carrier Frequency Test
DEV (deviation) meter. Record the deviation on the test forms. Press the “Return” key to stop the wideband TRU stops transmitting wide band data and data transmission. the screen shows: Wideband data is off Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 154: Sat Frequency And Deviation Tests
11-16 DRU tests SAT Frequency and Deviation tests Supervisory Audio Tones (SAT) are used for out-of-band signaling. This test ensures that the SAT frequency and deviation transmitted by the TRU are within specifications. Step Action Observation Ensure that the TRU configurations are as listed in Table 11-1 for the SAT Transmit test.
Page 155: Residual Modulation Test
(unmute) the TX audio. Enter TX, RX, BOTH or OFF >R Enter the option “TX”: The Audio status on the screen shows: >TX Audio: TX - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 156: Modulation Limiting Test
11-18 DRU tests Step Action Observation This step is performed at the MTX. From the MAP position or with a second terminal logged into the switch, test the trunk that is assigned to the TRU being tested by entering: MAPCI;MTC;TRKS;TTP;POST (CLLI name) MAP Trunk Test Position is displayed.
Page 157 The terminal will prompt for audio path: command to turn off (mute) the TX audio. Enter TX, RX, BOTH or OFF >R Enter the option “OFF”: The Audio status on the screen shows: >OFF Audio: off Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 158: Khz Tone Generation Test
11-20 DRU tests 1 kHz Tone Generation test This test ensures that the frequency and deviation of the 1 kHz test tone generated by the TRU are within specifications. Step Action Observation Ensure that the TRU configurations are as listed in Table 11-1 for the 1 kHz Tone Gen test.
Page 159: Setting Tx Audio Deviation To Site Operational Level
At the command prompt, perform a warm reset on the TRU by entering: >W The TRU will return to its normal working condition after the reset. Disconnect the interface terminal from the TRU. At the MTX, put the TRU back to service. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 160: Dru Receive Tests
11-22 DRU tests DRU receive tests This section describes the receive tests that can be performed on the DualMode Radio Unit (DRU). Note: The tests can be performed separately but the DRU receive test setup procedure must be performed before each individual test. WARNING RF radiation hazard Do NOT disconnect any RF cables when transmitters are on.
Page 161 4. Use the N command to change the Antenna Path to ‘B’ and ensure that the antenna ports are still 3 and 6. Perform the receive tests. Note: Change the connection to the antenna input ports accordingly. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 162 11-24 DRU tests Figure 11-5 DRU receive tests setup (shelf/site service affecting) Diversity Receive Receive Multicoupler Main Other TRU Transmit / Receive Shelves Preselect Splitter Filter Duplexer RX Bandpass Filter Receive Multicoupler Other TRU Shelves Splitter Preselect TX Bandpass Sniffer Filter Filter TRU Shelf...
Page 163: Receive Sensitivity Test
Receive and transmit audio line sensitivity test This test ensures that both the receive audio signal level and the transmit audio signal level of the DRU meet the required specifications in the AMPS mode. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 164: Receive Audio Level Test
11-26 DRU tests Step Action Observation Ensure that the DRU configurations are as listed in Table 11-1 for the Receive and Transmit Audio Line Sensitivity test. Note: SAT TX must be set to off in this test. Use the G command to set SAT TX to off, if necessary.
Page 165: Rssi Test
DRU for signal monitoring. This test ensures that the RSSI characteristics of the DRU under test are within specifications. Due to the transceiver splitter and shelf cable losses, the RSSI reading is 11 dB lower than the test signal applied. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 166 11-28 DRU tests Step Action Observation Ensure that the DRU configurations are as listed in Table 11-1 for the RSSI detect test. Using the communications monitor, apply a -60 dBm on-channel RF signal to the DRU under test. Use the P command to measure the RSSI The DRU will prompt for the measurement to signal reading.
Page 167: Rssi Offset Calibration
200W A P P L I E D 200 VDC IN/OUT 1KVDC/500V 2 AMPS IN/OUT AC MAX Communications Monitor (IFR 1600) Note: IFR 1600 or any equivalent communications monitor can be used. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 168 11-30 DRU tests Step Action Observation Put the DRU under test out of service at the MTX. Connect a low loss RF cable from the IFR output The RF cable loss should be known and Duplex 65W Max jack to the RMC input port A. will be used for calculation later.
Page 169 Enter the antenna path Current Receiver path: B >B <return> Change the connection to the RMC input port B accordingly. Repeat step 7 to step 12 for the new antenna path. - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 170 11-32 DRU tests Step Action Observation Use the O command to enter the value of dB4 = Antenna Port 1 2 3 4 5 6 (input level - measured RSSI reading - RF cable RSSI offset dB1 0 0 dB4 0 0 loss value) as the RSSI offset for path B, antenna >O <return>...
Page 171 DB5 = previous value set for port 5, and DB4 = previous value set for port 4. - End - Table 11-3 shows the DRU configuration for RSSI characteristics and Table 11-4 shows the RSSI measurement characteristics. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 172 11-34 DRU tests Table 11-3 DRU configuration for RSSI characteristics TRU Configurations TX/RX Audio SAT TX Tone Loop Compander WideBand Detect Audio Audio back Data RSSI Status Sens Command RSSI RSSI -18.0 detect Table 11-4 RSSI measurement characteristics RF signal input RSSI measurement (in dBm) (in dBm) Maximum...
Page 173: Sat Detect Test
The RX SAT status on the screen should 90 dBm on-channel RF signal modulated show: with a 6030 Hz tone at ±1.8 kHz deviation to RX SAT: 2 the DRU under test. - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 174: St Detect Test
11-36 DRU tests Step Action Observation Reduce the level of the RF signal until a “N” The RX SAT status on the screen shows: is indicated at the RX SAT status on the RX SAT: N screen. Check the RF signal level on the The RF signal level must be: communications monitor.
Page 175: Setting Rx Audio Level To Site Operational Level
At the command prompt, perform a warm reset on the DRU by entering: >W The DRU will return to its normal working condition after the reset. Disconnect the interface terminal from the DRU. At the MTX, put the DRU back to service. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 176: Transmit Rf Output Power Test
11-38 DRU tests Transmit RF output power test This test measures the power output of the TRU, the MCPA and the transmit path insertion loss. Since it interrupts service for the shelf and potentially (depending on system configuration) the whole site, it should be used only when a problem is suspected and then only during a low traffic period.
Page 177 EDIT SQLCH POWER MIC/ACC EXT MOD SINAD AUDIO DEMOD SCOPE VΩ 200W A P P L I E D 200 VDC IN/OUT 1KVDC/500V 2 AMPS IN/OUT AC MAX Communications Monitor (IFR 1600) Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 178: Requirements On The Transmit Rf Output Power Test
TRU at +15 dBm and nominal gain at -12 dB, giving an overall TRU output of +27 dBm Table 11-5 DualMode 800 Enclosure per-carrier power level at the output port of the MCPA shelf 1 MCPA module 2 MCPA modules 8 channels 12.50 W...
Page 179: Transmit Rf Output Power Test
Transmit RF output power test 11-41 Figure 11-8 Transmit power level of a DualMode 800 Enclosure with 24-channel per cell/sector using two MCPA modules -1.34 dBm +39.2 dBm +38.3 dBm +37.8 dBm (8.3 watts) (6.7 watts) (6.0 watts) (Note 5)
Page 180: Setting Tru Power Step Size And Max Power To Site Operational Level
11-42 DRU tests Setting TRU power step size and Max power to site operational level After the output power tests, ensure that the TRU power step size and the TRU Max power are set back to the site specific operational level. Check the TRU power step size setting previously defined for the site.
Page 181: Dru Digital Tests
Figure 11-9 shows the digital loopback paths. Note: The TRU3 does not support this loopback test method. It only supports the on-site BER test method. Figure 11-9 Digital loopback paths Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 182: Bit Error Rate Test At The Mtx Switch
11-44 DRU tests Bit error rate test at the MTX switch Bit Error Rate (BER) is defined as the ratio of erroneous bits to the total number of received bits in a transmission system. Typically, BER tests are performed on suspect equipment. However, external factors such as strong electromagnetic conditions, multi-path effects and environmental conditions like lightning may also cause high BER levels and need to be considered when a BER test fails.
Page 183 Repeat steps 5 to 7 for testing the next DRU. When tests are complete, turn logs off by entering: >LOGUTIL LOGUTIL >STOPDEV <device name> Device Stopped >DELREP <device name> MTX 230 1 Report deleted >QUIT > - End - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 184: Bit Error Rate Test At The Cell Site
11-46 DRU tests Bit error rate test at the cell site The BER test performed at the cell site verifies the BER performance of the DRU and the paths between the DRU and the communications monitor. It does not verify the BER performance of the links between the DRU and the DSPM.
Page 185 AC MAX Communications Monitor (IFR 1900) Note: This test works with an IFR1900 or HP8935 communications monitor with the required software. It does not work with an older IFR or HP model. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 186 11-48 DRU tests Step Action Observation Connect the test setup as shown in Figure 11-10. Set up the communications monitor for BER Note: Set the output of the communications measurement. monitor to -110 dBm. Refer to the user’s manual of your communications monitor for the setup procedure.
Page 187: Tdma Modulation Accuracy Test
(ii) press the ‘F5’ key that is labeled ‘Sp Tst’ FREQUENCY ERROR= (iii) select ‘MODULATION ACCURACY’ by RMS PHASE ERROR= pressing the ‘4’ key from the Data Entry RMS MAGNITUDE ERROR= Keys. RMS ERROR VECTOR MAGNITUDE= - continued - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 188 11-50 DRU tests Step Action Observation On the test equipment, enter the channel number that is to be tested. For the IFR1600: (i) use the Data Entry Keys to input the channel (ii) press the green ‘ENTER’ key to enter the input.
Page 189 Disconnect the test equipment from the sniffer port of the duplexer. Type: This command removes the run inject command and resets the TRU. >execute reset Disconnect the terminal interface from the TRU. - End - Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 190: Tdma Call Test
11-52 DRU tests TDMA call test This test is used to verify the origination and termination of a digital call through the DRU under test. Step Action Observation Originate a call with a TDMA cellular phone. The LED display on the front panel of the It may be necessary to make several calls TRU will indicate that the DRU is selected.
Page 191: Enclosure Maintenance
Demand office or purchase the items locally if available. Note 3: Cables are M/O items. They are not listed in this table. If you need to replace a cable, check the PEC/CPC on the cable or contact Nortel Networks Wireless Supply and Demand office.
Page 192 12-2 Enclosure maintenance Table 12-1 DualMode Urban field replaceable units (continued) Description PEC/CPC Service Remark Circuit Breaker 120A A0381990 Power Filter PCP NTFB14AA Duplexer, B Band NTFC04AC Duplexer, Full Band NTFC04AD Termination, 50-ohm A0689593 Multi-Channel Power Amplifier (MCPA) Shelf NTL107AC 4:1 Combiner assembly NTL107AE MCPA Module 110 Watt...
Page 193 Low Voltage Disconnect card NTTF60AC Channel Service Unit (CSU) 4-Slot Shelf NTLA7011 Shelf Interface Unit (SIU) for 4-Slot Shelf NTLA7013 T-Smart T1 SIU card A0383869 E-Smart E1 SIU card NTLA7012 Solar Shield Kit NTTF12AB Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 194: General Precautions
12-4 Enclosure maintenance General precautions There are some general precautions that need to be aware of when replacing components. RF radiation hazard Radio Frequency (RF) radiation is hazardous to anyone working in the cell site. Before removing any RF cable, ensure that the related power amplifier is turned off.
Page 195: Replacing Faulty Common Equipment (Ce) Units
9. At the MTX, put the cell site back into service. 10. Verify that the replacement unit is functioning correctly. 11. Return the faulty unit to your Nortel Networks Customer Service Operations office for repair. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 196: Replacing Faulty Radio Frequency (Rf) Units
9. At the MTX, put the cell site back into service. 10. Verify that the replacement unit is functioning correctly. 11. Return the faulty unit to your Nortel Networks Customer Service Operations office for repair. 411-2051-500 Draft 00.01 November 1999...
Page 197: Replacing The Tru Or Mcpa Shelf
The channel associated with the TRU should be out-of-service during the off- line replacement. This is of major significance if it is a control or locate channel. In that case, ensure the system switches to a back-up channel. Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 198: Replacing The Mcpa Module
12-8 Enclosure maintenance Follow the procedure when replacing a TRU: 1. At the MTX, put the affected channel(s) out-of-service. 2. Loosen the tab at the top edge of the TRU and move it away from the TRU. 3. Using the handle on the front of the TRU, gently pull the module out of the backplane connector and then slide it out of the shelf.
Page 199: Returning A Faulty Unit To Your Nortel Networks Cso Office
Returning a faulty unit to your Nortel Networks CSO office 12-9 Returning a faulty unit to your Nortel Networks CSO office After the replacement, return the faulty unit to your Nortel Networks Customer Service Operations (CSO) office for repair. Consult your Sales Manager or Account Manager for the specific return and repair process.
Page 200 12-10 Enclosure maintenance 411-2051-500 Draft 00.01 November 1999...
Page 201: Appendix A: Frequency Table
AMPS frequency allocation Band ‘A’ Control channels 313-333 Non-wireline carriers Voice channels 001-312 Voice channels, expanded spectrum 667-716 991-1023 Band ‘B’ Control channels 334-354 Wireline carriers Voice channels 355-666 Voice channels, expanded spectrum 717-799 Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 202 A-2 Appendix A: Frequency table Chan Chan Chan Chan 825.03 870.03 826.53 871.53 828.03 873.03 829.53 874.53 825.06 870.06 826.56 871.56 828.06 873.06 829.56 874.56 825.09 870.09 826.59 871.59 828.09 873.09 829.59 874.59 825.12 870.12 826.62 871.62 828.12 873.12 829.62 874.62 825.15 870.15...
Page 203 832.41 877.41 833.91 878.91 835.41 880.41 836.91 881.91 832.44 877.44 833.94 878.94 835.44 880.44 836.94 881.94 832.47 877.47 833.97 878.97 835.47 880.47 836.97 881.97 832.50 877.50 834.00 879.00 835.50 880.50 837.00 882.00 Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 204 A-4 Appendix A: Frequency table Chan Chan Chan Chan 837.03 882.03 838.53 883.53 840.03 885.03 841.53 886.53 837.06 882.06 838.56 883.56 840.06 885.06 841.56 886.56 837.09 882.09 838.59 883.59 840.09 885.09 841.59 886.59 837.12 882.12 838.62 883.62 840.12 885.12 841.62 886.62 837.15 882.15...
Page 205 844.41 889.41 845.91 890.91 847.41 892.41 848.91 893.91 844.44 889.44 845.94 890.94 847.44 892.44 848.94 893.94 844.47 889.47 845.97 890.97 847.47 892.47 848.97 893.97 844.50 889.50 846.00 891.00 847.50 892.50 Resrvd Resrvd Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 206 A-6 Appendix A: Frequency table Chan Chan Chan Chan Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd Resrvd...
Page 207 824.46 869.46 1011 824.64 869.64 1017 824.82 869.82 1023 825.00 870.00 1006 824.49 869.49 1012 824.67 869.67 1018 824.85 869.85 Note: RX = Mobile Transmit frequency TX = Base Station Transmit frequency Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 208 A-8 Appendix A: Frequency table 411-2051-500 Draft 00.01 November 1999...
Page 209: Appendix B: Test Forms
Appendix B: Test forms This section shows the test forms for the operational tests of a DualMode 800 Enclosure: • Power and grounding checks • HSMO checks • Antenna checks • DRU checks — Transmit tests • DRU checks — Receive tests •...
Page 210 B-2 Appendix B: Test forms Power and grounding checks (Chapter 4) Cell: Date: Performed by: Frame voltage and polarity test Bay 1 Bay 2 Bay 3 A Power: +27 Vdc ±0.5 Vdc B Power: +27 Vdc ±0.5 Vdc Bay 1 voltage MCPA ICRM LVD 1...
Page 211 ≤0.5 Ω Antenna return 824 - 849 MHz loss: >14.5 dB + 2 TX line loss 869 - 894 MHz Antenna return loss (Thruline wattmeter): Reflected power <4% of forward power Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 212: Dru Checks - Transmit Tests (Chapter 11
B-4 Appendix B: Test forms DRU checks — Transmit tests (Chapter 11) Cell: Date: Performed by: RF Frame: TRU Shelf: TRU transmit tests TRU 1 TRU 2 TRU 3 TRU 4 TRU 5 TRU 6 TRU 7 TRU 8 Serial number: Channel number: TX frequency (MHz): EEPROM CRC check:...
Page 213: Dru Checks - Receive Tests (Chapter 11
SAT detect 6000 Hz (level lost all): Less than -105 dBm SAT detect 6030 Hz (level lost all): Less than -105 dBm ST detect 10 kHz (level lost all): Less than -105 dBm Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08...
Page 214: Dru Checks - Digital Tests (Chapter 11
B-6 Appendix B: Test forms DRU checks — Digital tests (Chapter 11) Cell: Date: Performed by: RF Frame: TRU Shelf: TRU digital tests TRU 1 TRU 2 TRU 3 TRU 4 TRU 5 TRU 6 TRU 7 TRU 8 Serial number: Channel number: Bit Error Rate measure: Less than 6000 in 1,000,000...
Page 216 The information contained herein is the property of Nortel Networks and is strictly confidential. Except as expressly authorized in writing by Nortel Networks, the holder shall keep all information contained herein confidential, shall disclose it only to its employees with a need to know, and shall protect it, in whole...

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