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Tait T805 Service Manual

Quasi-synchronous transmission system
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Introduction
Contents
Copyright TEL
Revision package R805-00-102 is the second update to M805-00
A0.
This revision package contains:
• additional information on one updated PCB (the T805-04
backplane PCB IPN 220-01254-04)
• additional information on one new PCB (the T805 front
panel PCB IPN 220-01354-00)
• revisions to most sections in the manual to bring them up
to date and provide additional information.
The List of Effective Pages and Tables Of Contents have also
been updated to reflect these changes.
You can update your M805-00-101 to revision 102 status by sub-
stituting or adding these Revision Package pages as instructed
in the following table:
Revision Package
Section
Page Numbers
TOC/
1 to 8
LEP
1
1.5 to 1.8
4
4.1 to 4.10
5
5.3 to 5.4
7
7.1 to 7.18
8
8.5 to 8.12
9
9.13 to 9.14
10
10.3 to 10.6
10.11 to 10.18
13
13.3 to 13.4
M805-00 Revision Package
IPN R805-00-102
Pages To Replace
1 to 8
1.5 to 1.8
4.1 to 4.10
5.3 to 5.4
7.1 to 7.16
8.5 to 8.12
9.13 to 9.14
10.3 to 10.6
10.11 to 10.18
13.3 to 13.4
R805-00-102
5/11/96
Add In Sequence
After Page
5/11/96

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Summary of Contents for Tait T805

  • Page 1 This revision package contains: • additional information on one updated PCB (the T805-04 backplane PCB IPN 220-01254-04) • additional information on one new PCB (the T805 front panel PCB IPN 220-01354-00) • revisions to most sections in the manual to bring them up to date and provide additional information.
  • Page 2 App. A A1 to A4 A1 to A4 Additional Revi- Additional revision packages should be ordered from your near- sion Packages est Tait branch or approved dealer. Quote the Tait Internal Part Number (IPN R805-00-102) when ordering. 5/11/96 Copyright TEL...
  • Page 3 M805-00 T805 Quasi-Synchronous Transmission System Service Manual Issue 102 October 1996 M805-00-102 Copyright TEL 30/09/96...
  • Page 4 Fax: 64 3 358-2825 Phone: 64 3 348-3301 Fax: 64 3 343-0558 Australia Singapore Tait Electronics (Aust) Pty Ltd 275 Toombul Road Tait Electronics (Far East) Pte Ltd Northgate 4013 4 Leng Kee Road P.O. Box 679 SIS Building #05-11A Virginia Singapore 159088...
  • Page 5 If you return the address card at the front of this manual, you will be notified when revision packages containing new PCB information and/or text are available. You may then order as many packages as you require from your local Tait Company. Revision packages are supplied ready-punched for inclusion in your manual.
  • Page 6 Technical Information Any enquiries regarding this manual or the equipment it describes should be addressed in the first instance to your nearest approved Tait Dealer or Service Centre. Further technical assistance may be obtained from the Customer Support Group, Tait Radio Infrastructure Division, Tait Electronics Ltd, Christchurch, New Zealand.

  • Page 7: Table Of Contents

    Quasi-Synchronous Operation With Audio Distribution Net- works Introduction To Servicing Initial Programming & Adjustment Functional Tests Fault Finding T805-04 Backplane T805-06 1U Rack T805 System Controller Commissioning Tests PCB Information Appendix A Glossary Of Terms Appendix B Decimal-Hex-Binary Conversion Table...
  • Page 8 M805-00 List Of Effective Pages The total number of pages in this Manual is 234, as listed below. Page Issue Date Page Issue Date 30/09/96 3.12 30/04/95 30/09/96 3.13 30/04/95 30/09/96 3.14 30/04/95 30/09/96 3.15 30/04/95 (fold-out) 30/04/95 3.16 blank (fold-out) 30/09/96 30/09/96...
  • Page 9 M805-00 Page Issue Date Page Issue Date 7.14 30/09/96 10.13 30/09/96 7.15 30/09/96 10.14 30/04/95 7.16 30/09/96 10.15 30/04/95 7.17 30/09/96 10.16 30/09/96 7.18 blank 10.17 30/09/96 10.18 30/09/96 30/04/95 10.19 30/04/95 30/04/95 10.20 blank 30/04/95 30/04/95 11.1 30/04/95 30/09/96 11.2 blank 30/04/95...
  • Page 10 M805-00 Page Issue Date Page Issue Date 14.3.5 30/04/95 30/04/95 14.3.6 blank 30/04/95 14.3.7 30/04/95 14.3.8 30/04/95 14.3.9 30/04/95 (fold-out) 14.3.10 30/04/95 (fold-out) 14.3.11 30/04/95 (fold-out) 14.3.12 30/04/95 (fold-out) 14.3.13 30/09/96 14.3.14 30/09/96 14.3.15 30/09/96 14.3.16 30/09/96 14.3.17 30/09/96 14.3.18 30/09/96 14.3.19 30/09/96 (fold-out)

  • Page 11: General Information

    General Information M805-00 Clock Frequency .. 40.00MHz A/D Sampling Rate .. 11.57kHz ASP Rack Frame Housing .. 483mm, 1U or 6U high ASP Card Dimensions .. 233mm x 210mm Maximum Number Of System Cards Per Rack Frame .. 9 Power Supply Requirements ..
  • Page 12 General Information M805-00 1.2.5 Audio Interface Card - LEM Maximum Number Of LEMs Per System .. 222 Maximum Number Of LEMs Per Network .. 222 Audio Interfaces: Inputs: High Frequency Training Audio/Quasi-Synchronous Audio .. 47kΩ balanced Low Frequency Training Audio/CTCSS ..
  • Page 13 General Information M805-00 Signal To Noise Ratio .. >50dB Distortion .. <1% Input And Output Levels .. -10dBm nominal into a balanced load Maximum Audio Input And Output Levels .. 0dBm into a 600Ω balanced load Digital Inputs/Outputs .. "ICCS" (transmitter key input) Communication With Quasi-Synchronous System Controller ..
  • Page 14 .. terminal blocks RS-485 .. 9-pin D-range Series Link To Other Racks .. 34-way IDC 1.2.9 T805-06 1U Rack Maximum Number Of ASP Cards Per Rack .. 1 Type of ASP Cards To Be Fitted .. T805-01 AIM .. T805-01 ARM Power Supply ..

  • Page 15: Asp Card Operation

    ASP Card Operation M805-00 ASP Card Operation This section provides a functional description of the T805 Audio Signal Processing (ASP) cards, i.e. TSGM, LEM, AIM and ARM. Each of these cards has the same hard- ware but different operating software.
  • Page 16 ASP Card Operation M805-00 30/04/95 Copyright TEL...

  • Page 17: T805-03 Test Signal Generator Module (Tsgm)

    ASP Card Operation M805-00 T805-03 Test Signal Generator Module (TSGM) Speech Audio Audio Electronic buffer amps audio relay HF audio Audio (speech or Audio training tones) buffer Audio amps processor Audio buffer Electronic relay LF audio External CTCSS Audio Audio...
  • Page 18 ASP Card Operation M805-00 Taking the ICCS input of the TSGM to logic "1" will cause it to generate a keytone of the correct level. This is detected by the AIM, initiating the inversion/recovery process and keying the transmitter connected to the ARM. The tone will continue for as long as the input is at logic "1", and will cease 250ms after the input has fallen to logic "0"...
  • Page 19 ASP Card Operation M805-00 Network Number TSGM ID Numbers (Decimal) 223, 224 225, 226 227, 228 229, 230 231, 232 233, 234 235, 236 237, 238 Table 4.1 Assignment Of TSGM IDs According To Network If the system TSGM fails, the RS-485 transmitter is automatically disabled to prevent corruption of the communications line.

  • Page 20: T805-02 Line Equaliser Module (Lem)

    ASP Card Operation M805-00 T805-02 Line Equaliser Module (LEM) Breakout control Start gun (synchronisation) pulse ICCS Breakout audio Audio Audio Electronic buffer amps (ADC-2 system only) relay Combined HF and Audio HF audio Audio LF audio buffer (speech or training tones)

  • Page 21: T805-01 Audio Inversion And Recovery Modules

    If required, the signals are then separated (audio and CTCSS) and fed into the transmitter. Control of the transmitter's key line is via the open collector "DIGOUT" out- put from its ARM. 4.3.1 T805-01 Audio Inversion Module (AIM) Tx key ICCS Combined HF and...

  • Page 22: Local Mode

    ASP Card Operation M805-00 4.3.1.1 Local Mode In this mode the AIM has two states of operation: pass and inversion. Pass Mode In this mode the AIM is completely transparent. Any audio or signalling (e.g. FSK) input in the 67-2850Hz frequency range is passed straight through to the appropriate output.

  • Page 23: T805-01 Audio Recovery Module (Arm)

    ASP Card Operation M805-00 4.3.2 T805-01 Audio Recovery Module (ARM) (Inverted) Audio Audio Electronic buffer amps HF/LF audio relay HF audio Audio Audio to transmitter buffer Audio amps processor Audio buffer Electronic relay LF audio to Audio Audio Audio buffer...

  • Page 24: Local Mode

    4.10 ASP Card Operation M805-00 Amplitude Inverted audio + CTCSS 2833 2900 Frequency (Hz) Recovery process applied Amplitude Audio + CTCSS 2550 Frequency (Hz) Figure 4.7 ARM Operation When In Remote Recovery Mode 4.3.2.2 Local Mode In this mode the ARM is in the recovery mode permanently. 30/09/96 Copyright TEL...
  • Page 25 Quasi-Synchronous system. Figure 5.1 shows how the T805 Quasi-Synchronous system is integrated into the ADC-1 system. Speech (HF) audio from the ADC-1 system is passed into the TSGM where, under nor- mal operation, an internal switching arrangement passes it to the appropriate output port.
  • Page 26 Quasi-Synchronous Operation With ADNs M805-00 which feeds into its LEM changes state (from logic 0 to logic 1), allowing independent audio to be fed into the LEM. Note that, in order to key the inversion process for the AIMs, either the AIMs' ICCS input must be active or the 2970Hz key tone must be present in the audio.

  • Page 27: Initial Programming & Adjustment

    The following section describes the adjustment procedure for the T805 Audio Signal Processing cards, the linking arrangements for the T805-04 backplane PCB, the linking arrangement for the T805-06 1U rack and the installation procedure for the T805-10 Quasi-Synchronous System Controller operating software.
  • Page 28 Title Page Line Barrier Unit Connection 7.16 7.5.1 Introduction 7.16 7.5.2 Wiring Between The Line Barrier Unit And The T805 System 7.16 Installing T805 Software 7.17 Figure Title Page Jumper Positions For Link 3 On The ASP Card Test Equipment Set-up AIM/ARM Input And Output Levels 7.16...
  • Page 29 -10dBm. Audio is injected into the T805 ASP card via a 600Ω balanced line or a 47kΩ balanced line, depending on the type of card being adjusted (TSGM, LEM, AIM, ARM) and the audio distribution network into which the Quasi-Synchronous System is being inte- grated.
  • Page 30 HF audio (O/P 1) or is fed to a separate output (O/P 2) not used Table 7.2 DIP switch settings for switches D3-D7 (SW301) for a T805-01 ASP card (AIM or ARM). not used network 1 defines the audio distribution network into...
  • Page 31 Initial Programming & Adjustment M805-00 D8-D15 (SW302) Address Table 7.5 DIP switch settings for switches D8-D15 (SW302) if the ASP card is defined as an LEM. These are used to define the address of the card (1 - 222). Refer to Appendix B for a complete table of settings.
  • Page 32 Initial Programming & Adjustment M805-00 CTCSS Frequency D9-D15 (SW302) Generated Internally By TSGM (Hz) Externally Supplied CTCSS Used 67.0 71.9 77.0 82.5 88.5 94.8 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 162.2 167.9 173.8 179.9 186.2...
  • Page 33 Initial Programming & Adjustment M805-00 CTCSS Frequency D9-D14 (SW302) Generated Internally By TSGM (Hz) Externally Supplied CTCSS Used 67.0 71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5 94.8 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7...
  • Page 34 Initial Programming & Adjustment M805-00 7.1.3 TSGM 7.1.3.1 DIP Switch Settings The following are the settings for switches D0-D15 (SW301 & SW302) if the ASP card is defined as a TSGM. If internal CTCSS is required, refer to Table 7.7 or Table 7.8 for the information on relating the DIP switch setting to the CTCSS frequency.
  • Page 35 (if using software v2.12 or earlier). Inject a balanced (earth isolated) 1kHz signal at a level of -10dBm (600Ω) into "I/P-1" on the T805-04 backplane. If linked correctly, the 600Ω termination is on the backplane. Monitor pin 24 of IC210 and adjust RV201 to obtain a level of 0dBm. This sets the maximum input level into the A/D converter.
  • Page 36 Short 1-2 on links LK3-XA and LK3-XB (where X is the position the ASP card occupies on the rack) and inject a balanced (earth isolated) 1kHz signal at a level of -10dBm into "I/P-3" on the T805-04 backplane. 30/09/96 Copyright TEL...
  • Page 37 If required, return links LK3-XA & LK3-XB to their original position. Inject a balanced (earth isolated) 1kHz signal at a level of -10dBm into "I/P-2" on the T805-04 backplane. Monitor pin 26 of IC211 and adjust RV203 to obtain a level of 0dBm. This sets the maximum input level into the A/D converter.
  • Page 38 Inject a balanced (earth isolated) 1kHz signal at a level of -10dBm (600Ω) into "I/P-1" of the appropriate port on the T805-04 backplane. Monitor pin 24 of IC210 and adjust RV201 to obtain a level of 0dBm. This sets the maximum input level into the A/D converter.
  • Page 39 Inject a balanced (earth isolated) 1kHz signal at a level of -10dBm (600Ω) into "I/P-1" of the appropriate port on the T805-04 backplane. Monitor pin 24 of IC210 and adjust RV201 to obtain a level of 0dBm. This sets the maximum input level into the A/D converter.
  • Page 40 Adjust the CTCSS deviation pot. (if fitted) so that a modulation level of 10% of maximum system deviation is achieved. If there is no CTCSS deviation pot. fitted, set the final deviation level within the T805-06 ARM. 30/09/96 Copyright TEL...
  • Page 41 Initial Programming & Adjustment 7.15 M805-00 Monitor Receiver Output Level Adjustment Note: The audio processor of the monitor receiver must be linked for a 67Hz to 3kHz de-emphasised frequency response (all high pass filtering should be bypassed). Refer to the appropriate service manual for more informa- tion.
  • Page 42 These line barrier units must be Telecom approved for the country in which the T805 system is operated. In the UK the T805 system is approved for indirect connection into the Telecom speech band circuits (BS6328). Where signalling is required, a nominal frequency of 2280Hz is used.
  • Page 43 Sections 7 or 8 (all input and output levels are set for 600Ω terminations). Installing T805 Software To install the operating software for the T805 Quasi-Synchronous System Controller, fol- low the instructions in the System Controller manual and either power up the PC or push the reset button.
  • Page 44 7.18 Initial Programming & Adjustment M805-00 30/09/96 Copyright TEL...

  • Page 45: Functional Tests

    Functional Tests M805-00 8.2.2 Test Mode 1 8.2.2.1 Introduction Remove any shorts from LINK 1. Set the DIP switches (SW301 & SW302) as shown in Table 8.1 (note that only switches D0, D1 and D2 define the test mode). SW301 SW302 -- Not relevant to card setting.
  • Page 46 Functional Tests M805-00 • Inject a balanced (earth isolated) 1kHz signal at a level of -10dBm into input 3 (600Ω termination on test lead). Leave input 4 unconnected. Monitor the level at TP13 or pin 26 of AIC-1 (IC210) and adjust RV205 for a level of 0dBm (2.2V p-p).
  • Page 47 Functional Tests M805-00 • Computer Unavailable Monitor the signal on pin 7 of IC315 (DS3695) with an oscilloscope and check that a 600Hz square wave is present. 8.2.2.4 Watchdog Timer Check that the reset circuit and watchdog timer has been disabled by a short on LINK 1.
  • Page 48 Functional Tests M805-00 8.2.3 Test Mode 2 8.2.3.1 Introduction Remove any shorts from LINK 1. Set the DIP switches (SW301 & SW302) as shown in Table 8.2 (note that only switches D0, D1 and D2 define the test mode). Apply power to the ASP card and short LINK 1 after the ASP card has success- fully powered up.
  • Page 49 Functional Tests M805-00 • Inject a balanced (earth isolated) 1kHz signal at a level of -10dBm into input 3 (600Ω termination on test lead). Leave input 4 unconnected. Monitor the level at TP13 or pin 26 of AIC-1 (IC210) and adjust RV205 for a level of 0dBm (2.2V p-p).
  • Page 50 8.10 Functional Tests M805-00 8.2.3.5 Digital I/O The following test and the corresponding test in Section 8.2.4.4 verify that all the DIP switches are functioning correctly. Set the DIP switches (SW301 & SW302) as shown in Table 8.3. Check that the "ARM" LED lights. SW301 SW302 Note:...
  • Page 51 Functional Tests 8.11 M805-00 8.2.4 Test Mode 3 8.2.4.1 Introduction Remove any shorts from LINK 1. Set the DIP switches (SW301 & SW302) as shown in Table 8.4 (note that only switches D0, D1 and D2 define the test mode). Apply power to the ASP card.
  • Page 52 8.12 Functional Tests M805-00 • Inject a balanced (earth isolated) 1kHz signal at a level of -10dBm into input 1 (600Ω termination on test lead). Monitor the level at TP22 or pin 24 of AIC-1 (IC210) and adjust RV201 for a level of 0dBm (2.2V p-p).
  • Page 53 Fault Finding 9.13 M805-00 9.4.9 T805 Watchdog Timer Check for overheating components and short circuits. Replace if necessary. Look at pin 9 of IC107. Does the wave- form appear similiar to the one below? Is pin 3 of IC107 oscillating 30µs...

  • Page 54: Fault Finding

    9.14 Fault Finding M805-00 9.4.10 T805 Digital Outputs Check for overheating components and short circuits. Repair as necessary. Remove power from the ASP card. Remove any short from link-1. Place card in test mode 1 and apply power. Is pin 8 of IC313 at 0V? Is pin 12 of IC306 at 0V? Replace IC313.

  • Page 55: T805-04 Backplane

    10.1 Introduction The Tait Quasi-Synchronous system is a modular product and may be housed in either one or more 6U high 483mm rack frames. A 1U high rack frame is also available for remote sites and is covered in Section 11.

  • Page 56: T805-06 1U Rack

    RS-485 Figure 10.1 Single T805-04 Wiring Details A single rack frame may be used when the T805 Quasi-Synchronous system requires no more than nine T805 ASP cards. In this situation the System Controller is addressing only one Group and the rack wiring is as shown in Figure 10.1. Ensure that the cables are not subjected to any stresses due to tight bends or incorrect lengths.
  • Page 57 There are a number of links required to configure the backplane for the Audio Distribu- tion network with which the T805 Quasi-Synchronous System is to operate. The tables below relate the linking arrangement to the Distribution System and the type of card being used in that port position.
  • Page 58 10.6 T805-04 Backplane M805-00 TSGM link 2-XA see 10.3.1.3 link 2-XB see 10.3.1.3 link 2-X see 10.3.1.3 link 3-XA link 3-XB link 5-XA* link 5-XB* link 6-XA* link 6-XB* *These links apply only to ports 1 and 2 (i.e. X = 1 or 2 only).
  • Page 59 Group is started for each new network in the T805 system. In this case the first rack of the network will have PL-1 unconnected to the previous rack in the system, but will use PL-3 to link audio and con- trol signals (including RS-485) to the next rack in the network.
  • Page 60 First Rack & Other Racks Last Rack In In Group Of 32 Group Of 32 link 7A link 7B link 7C Table 10.5 Linking details for each "Group" of racks in a multi- rack T805 Quasi-Synchronous network. 30/04/95 Copyright TEL...
  • Page 61 T805-04 Backplane 10.13 M805-00 The linking details as shown in Table 10.6 and 10.7 are the same as those for Table 10.2 and 10.3 respectively. They have been repeated here for ease of reference. TSGM link 2-XA see 10.3.2.4 link 2-XB see 10.3.2.4...
  • Page 62 10.14 T805-04 Backplane M805-00 10.3.2.4 Linking Details For The Test Receiver (Multi-rack Systems) Test Receiver Feeding A Single LEM The signal from a test receiver always feeds into the high impedance input (47kΩ) of the ASP card, input 2. The required terminating impedance of 600 ohms is linked in on the backplane.
  • Page 63 T805-04 Backplane 10.15 M805-00 from LEM-1 to LEM-2. Short positions 1-2 of links LK2-2A & LK2- 2B to pass the signal from LEM-2 to LEM-3. Short positions 2-3 of links LK2-3A & LK2-3B to prevent the audio from being passed any further (an open circuit to discontinue the signal).
  • Page 64 T805-04 Backplane M805-00 10.4 Connection Tables The following tables should assist the understanding of the connections required between the T805 Quasi-Synchronous system and the transmitters and audio distribu- tion network to which it is connected. TSGM Inputs Nominal Level Assignment...
  • Page 65 T805-04 Backplane 10.17 M805-00 LEM Inputs Nominal Level Assignment speech (300-2550Hz) -10dBm input 3 + key tone (2970Hz) -23dBm external CTCSS -13dBm input 4 (software v2.11 & earlier: 67-250.3Hz software v2.12 & later: 67-259.1Hz) test receiver audio -10dBm input 2...
  • Page 66 10.18 T805-04 Backplane M805-00 AIM Inputs Nominal Level Assignment speech/HF training tone (300-2550Hz) -10dBm input 1 + key tone (2970Hz) -23dBm + CTCSS/LF training tone -13dBm (software v2.11 & earlier: 67-250.3Hz software v2.12 & later: 67-259.1Hz) AIM Outputs Nominal Level...

  • Page 67: Commissioning Tests

    Switch on the Quasi-Synchronous System Controller. Wait for approximately 2 minutes while the computer boots up and begins polling the T805 ASP cards. Any one of the card racks may now be switched off without affecting the function of the others.
  • Page 68 13.4 Commissioning Tests M805-00 13.2 System Test Levels Figure 13.1 shows a typical TSGM/LEM/AIM/ARM/monitor receiver combination with test levels. Ensure these are measured and verified. Refer to Section 7 if there is a discrepancy. 1900Hz tone (-10dBm) + 2777Hz (-13dBm) 1900Hz tone (-10dBm) + 2900Hz carrier (-23dBm) + 2777Hz (-13dBm)

  • Page 69: Pcb Information

    This section contains the following information. Section Title Page 14.1 Introduction 14.1.3 14.2 T805-02 ASP Card 220-01253-01 14.2.1 14.3 T805-04 Backplane PCB 220-01254-02 14.3.1 220-01254-04 14.3.13 14.4 T805-06 Adaptor PCB 220-01279-00 14.4.1 220-01279-01 14.4.9 14.5 T805 Front Panel PCB 220-01354-00 14.5.1 Copyright TEL 30/09/96...
  • Page 70 14.1.2 PCB Information M805-00 30/04/95 Copyright TEL...

  • Page 71: This Section Contains The Following Information

    T805-02 PCB Information 14.2.1 M805-00 14.2 T805-02 ASP Card This section contains the following information. Section Page 220-01253-01 Parts List 14.2.2 Mechanical & Miscellaneous Parts 14.2.5 Grid Reference Index 14.2.7 PCB Layout - Bottom Side 14.2.11 PCB Layout - Top Side 14.2.12...
  • Page 72 14.2.2 T805-02 PCB Information M805-00 T805-02 Parts List (IPN 220-01253-01) How To Use This Parts List The components listed in this parts list are divided into two main types: those with a circuit reference (e.g. C2, D1, R121, etc) and those without (miscellaneous and mechanical).

  • Page 73: T805-04 Backplane Pcb 220-01254-02

    T805-04 PCB Information 14.3.1 M805-00 14.3 T805-04 Backplane PCB This section contains the following information. Section Page 220-01254-02 Parts List 14.3.2 Mechanical & Miscellaneous Parts 14.3.5 Grid Reference Index 14.3.7 PCB Layout - Bottom Side 14.3.9 PCB Layout - Top Side 14.3.10...
  • Page 74 14.3.2 T805-04 PCB Information M805-00 T805-04 Parts List (IPN 220-01254-02) How To Use This Parts List The components listed in this parts list are divided into two main types: those with a circuit reference (e.g. C2, D1, R121, etc) and those without (miscellaneous and mechanical).
  • Page 75 T805-04 PCB Information 14.3.13 M805-00 T805-04 Parts List (IPN 220-01254-04) How To Use This Parts List The components listed in this parts list are divided into two main types: those with a circuit reference (e.g. C2, D1, R121, etc) and those without (miscellaneous and mechanical).
  • Page 76 14.3.14 T805-04 PCB Information M805-00 Description Description CN8-3 240-04030-08 TERMINAL BLOCK PCB MTG 6WAY FRT 5MM LK6-1B 240-00020-59 HEADER 3 WAY 1 ROW PCB MTG PITCH LK6-2A 240-00020-59 HEADER 3 WAY 1 ROW PCB MTG CN8-4 240-04030-09 TERMINAL BLOCK PCB MTG 2WAY 5MM PITCH.
  • Page 77 T805-04 PCB Information 14.3.15 M805-00 Description Description 030-52560-20 RES FILM AI 56E 5% 0.4W 4X1.6MM 030-54470-20 RES FILM AI 4K7 5% 0.4W 4X1.6MM R100 030-52560-20 RES FILM AI 56E 5% 0.4W 4X1.6MM R101 030-55100-20 RES FILM AI 10K 5% 0.4W 4X1.6MM...
  • Page 78 14.3.16 T805-04 PCB Information M805-00 T805-04 Mechanical & Miscellaneous Parts (IPN 220-01254-04) Description Description 200-00010-04 WIRE T/C 0.7MM 356-00010-05 TAG SOLDER 4MM LONG M6144/4.2 For ferrite beads. Front panel earth strap. 201-00030-04 WIRE #1 T/C WIRE 7/0.2MM PVC YELLOW 356-00020-06 RECEPTL 6.3MM QUICK CONNECT FLARED INSU-...
  • Page 79 14.3.17 M805-00 T805-04 Grid Reference Index (IPN 220-01254-04) How To Use This Grid Reference Index The first digit in the PCB layout reference is a "1" or "2", indicating the top or bottom side layout respectively, and the last two charac- ters give the location of the component on that diagram.
  • Page 80 14.3.18 T805-04 PCB Information M805-00 Device Circuit Device Circuit Device Circuit Device Circuit LK5-1A 1:W6 1-D5 1:E13 2-C5 1-F4 1-R2 LK5-1B 1:X3 1-D4 1:E12 2-C6 1-F5 1-R3 LK5-2A 1:U6 1-F5 1:E13 2-C5 1-F6 1-R4 LK5-2B 1:V3 1-F4 1:E12 2-C5 1-F7...
  • Page 81 T805-04 PCB Information 14.3.19 M805-00 T805-04 PCB Layout - Bottom Side 220-01254-04 Copyright TEL 30/09/96...
  • Page 82 14.3.20 T805-04 PCB Information M805-00 T805-04 PCB Layout - Top Side - 220-01254-04 30/09/96 Copyright TEL...
  • Page 83 T.B. D.ELDER N.KELLER 09/04/92 PROJECT: DESIGNER: FILE NAME: FILE DATE: NO.SHEETS: NOTE: SHEET 3 CONTAINS NON-RELEVANT INFORMATION REV/ISS AMENDMENTS DRAWN CHKD D.O. APVD DATE T805 S. LOWE 805BP_4B 03/09/96 T805-04 Backplane - Sheet 1 of 2 220-01254-04 Copyright TEL 30/09/96...
  • Page 84 D.ELDER N.KELLER 09/04/92 NOTE: SHEET 3 CONTAINS NON-RELEVANT INFORMATION PROJECT: DESIGNER: FILE NAME: FILE DATE: NO.SHEETS: REV/ISS AMENDMENTS DRAWN CHKD D.O. APVD DATE T805 S. LOWE 805BP_4B 03/09/96 T805-04 Backplane - Sheet 2 of 2 - 220-01254-04 30/09/96 Copyright TEL...
  • Page 85 T805-06 PCB Information 14.4.9 M805-00 T805-06 Parts List (IPN 220-01279-01) How To Use This Parts List The components listed in this parts list are divided into two main types: those with a circuit reference (e.g. C2, D1, R121, etc) and those without (miscellaneous and mechanical).
  • Page 86 399-00010-51 BAG PLASTIC 75*100MM 400-00020-05 SLEEVING 1.5MM SIL RUBBER 410-01088-00 CRTN T800 SLIMLINE 520X440X150MM 410-01089-00 PKG T801 A3M2806 POLYST FOAM (COMPLETE 6 PI 410-01093-00 PKG T805-06 POLYSTYRENE FOAM 327 X 420 X 45M 428-00002-00 SOFTWARE LICENCE AGREEMENT 30/09/96 Copyright TEL...
  • Page 87 T805 Front Panel PCB Information 14.5.1 M805-00 14.5 T805 Front Panel PCB This section contains the following information. Section Page 220-01354-00 Parts List 14.5.2 Circuit Diagram 14.5.4 PCB Layout - Top Side 14.5.5 PCB Layout - Bottom Side 14.5.6 Copyright TEL...
  • Page 88 T805 Front Panel PCB Information M805-00 T805 Front Panel PCB Parts List (IPN 220-01354-00) How To Use This Parts List The components listed in this parts list are divided into two main types: those with a circuit reference (e.g. C2, D1, R121, etc) and those without (miscellaneous and mechanical).
  • Page 89 T805 Front Panel PCB Information 14.5.3 M805-00 Copyright TEL 30/09/96...
  • Page 90 14.5.4 T805 Front Panel PCB Information M805-00 T805 Front Panel PCB Circuit Diagram - 220-01354-00 30/09/96 Copyright TEL...
  • Page 91 T805 Front Panel PCB Information 14.5.5 M805-00 T805 Front Panel PCB Layout - Top Side 220-01354-00 Copyright TEL 30/09/96...
  • Page 92 14.5.6 T805 Front Panel PCB Information M805-00 T805 Front Panel PCB Layout - Bottom Side - 220-01354-00 30/09/96 Copyright TEL...

  • Page 93: Glossary Of Terms

    Amplitude Response The variation in amplitude of a signal as its fre- quency is changed. Audio Recovery Module (T805-01). A complement to the AIM. ASP Card Audio Signal Processing card. The hardware description for the cards used in the Quasi-Synchro- nous system.
  • Page 94 Land Line A means of linking communications between two physically separated sites using a Telecom link. Line Equaliser Module (T805-02). The module that performs the audio equalisation required to operate a transmitter in the Tait Quasi-Synchronous system. LF Training Audio The audio signals used for training/equalising the LEMs, occupying the 45-300Hz band.
  • Page 95 Quasi-Synchronous system and occupies the fre- quency range 300-2550Hz. System Controller The computer (IBM compatible 386 or better) used to control the T805 Quasi-Synchronous system. Training Mode The mode the Quasi-Synchronous system enters when the equalisation calculation process occurs. It...
  • Page 96 Quasi-Synchronous system. TSGM Test Signal Generator Module (T805-03). The unit that provides the training signals which the LEMs use to equalise their path in the Quasi-Synchronous system.

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