ISSUE 1-2A
Maintenance Handbook T6R VHF Receivers
CONTENTS Preliminary Pages Title page Contents (this list) Warnings page Amendment Amendme nt record Modification record List of abbreviations used in this handbook
Section 1
-
GENERAL INFORMATION
Section 2
-
TECHNICAL DESCRIPTION
Section 3
- MAINTENANCE
Section 4
-
VIRTUAL FRONT PANEL (VFP)
Section 5
-
PARTS LIST
Section 6
- FIGURES
WARNINGS
LETHAL VOLTAGES
Equipments in operational use contain lethal voltages and operations involving the removal of covers or panels should only be undertaken by skilled personnel who are aware of the hazards involved.
CAUTION ESDs The equipment covered by this handbook contains electrostatic sensitive devices (ESDs). Observe handling precautions to avoid static charges that may damage these devices. UNAUTHORIZED MODIFICATIONS Changes or modifications made to this equipment, not expressly approved by Park Air Electronics or parties authorized by Park Air Electronics could void the user’s authority to operate the equipment.
AMENDMENT RECORD
Amdt.
Incorporated By
Date
Brief Details
ECN
1
Park Air
Sep 03
Section 6, List of Figures, Fig 10 title amended.
-
2A
Park Air
Nov 03
Section 6, List of Figures, drawing numbers added.
-
MODIFICATION RECORD MOD No.
Details
Date
LIST OF ABBREVIATIONS USED IN THIS HANDBOOK
ac A/D AGC AM BIT D/A dc dB dBm DSP ETI ESD Hz I/O kHz LCD LED MARC MHz mm MSK PC PCB
alternating current analogue to digital audio gain control amplitude modulation built-in test digital to analogue direct current decibel decibels relative to 1 mW digital signal processing elapsed time indicator electrostatic sensitive device hertz input/output kilohertz liquid crystal display light emitting diode multi-access remote control system megahertz millimetre minimum shift keying personal computer printed circuit board
Section 1
General Information
Paragraph 1 Introduction 5 Model part number 6 Operating frequency 7 Input supplies 8 Built-in test (BIT) indications 11 Configurations
INTRODUCTION 1 This handbook provides the maintenance personnel with sufficient information to maintain and repair the T6R receiver to module level. It provides an overview of the internal architecture of the receiver and describes the various replaceable modules, their function, part number and how to obtain replacements. In particular it enables the user to:
Conduct scheduled maintenance tasks including checking/setting the reference frequency oscillator to compensate for long term ageing effects
Identify any tools or test equipment required to maintain the receiver
4 The maintenance handbook, lead and software is sold as a T6R maintenance kit part number 70-6100MKIT. Note ... Both the maintenance handbook and user guide are available on CD-ROM. Contact PAE for details.
MODEL PART NUMBER 5
The part number for the T6R receiver is:
B6100
OPERATING FREQUENCY 6 The receiver’s operating frequency is determined by the synthesiser circuit in the Rx RF module and can be changed by the user through the front panel, through the VFP or through an associated MARC system (or compatible control and data system). Details of how to change the operating frequency are contained in the T6R Receiver User Guide, Section 4 of this handbook (VFP) and the MARC User Guide (MARC).
CONFIGURATIONS 11 The connectors used to configure the receiver depend on the required operating mode. The purpose of each connector is described in the following text: Antenna Connector
Used in all operating modes to connect the 50 ohm antenna feeder cable.
Headset/Diagnostics Connector
This is a dual purpose connector. A headset can be connected to enable local AM-voice operation. Alternatively, a PC can be connected to allow use of the VFP, to set the receiver's operational settings, or to download new software.
Reference Connector
Used in all operating modes to check and reset the receiver's reference frequency.
Facilities Connector
Used primarily to connect remote signals when using AM-voice mode and the receiver does not form part of a MARC system. Some auxiliary signals available at this connector, for example the 24 volt (nominal) unregulated output supply, can be utilized irrespective of the operating mode.
MARC Port
The MARC port is used to connect remote signals when the receiver forms part of a MARC system, or other compatible control and data system.
Section 2 Paragraph 1 INTRODUCTION 4 MODULES AND ASSEMBLIES 7 DSP module 8 Central processor 9 Digital signal processing 10 Programmable gate array 11 Speech coding/decoding 12 Computer interface 13 Serial remote control/data port 14 Facilities port 15 Front panel interface 16 Analogue control interfaces 18 Digital control interfaces 19 Rx RF module 20 RF converter 22 IF filter/converter 25 Synthesiser 28 BIT 29 Front panel module 30 LCD module 31 Rotary encoded switch 32 Indicators
Technical Description
INTRODUCTION 1 This section describes the modules and assemblies that comprise the T6R receiver and details the equipment’s connectors. Designed for rack mounting in a standard 19 inch rack the unit operates from standard 120/240 V ac supplies with automatic changeover to 28 V dc in the event of mains failure. The majority of user connections are made through rear mounted connectors. 2 A front panel connector is used for the connection of a headset for local operation or for the connection of a PC for Virtual Front Panel (VFP) control. Operational settings are configured at the front panel, through the VFP, or through an associated MARC system (or compatible control and data system). At the receiver, operational settings are selected and displayed using the front panel Scroll/Select switch and the LCD. 3 The receiver is housed in a sheet metal chassis with top and bottom lids. Two compartments (top and bottom) contain most modules and assemblies with front and rear panels straddling the compartments.
MODULES AND ASSEMBLIES 4
The receiver comprises the following replaceable modules and assemblies:
DSP module
Rx RF module
Front panel module
Digital Signal Processing 9 The Super H processor is supported by two Analogue Devices 2171 DSP microprocessors providing the computational power required to implement the demodulation algorithms.
Programmable Gate Array 10 Circuit functions are register mapped into the Super H address space using a Xilinx FPGA. This allows the hardware configuration to be altered or upgraded by downloading new firmware.
Speech Coding/Decoding 11 The A/D and D/A functions required to interface the digital processing to the analogue lines are provided by an A Law speech CODEC. Audio output is used to drive a front panel connected headset or loudspeaker. Audio is also routed out via the Facilities port.
Computer Interface 12 Two RS422 full duplex synchronous serial ports, using HDLC protocol, provide the interface to an external computer for use in digital modulation modes. A set of four input lines and four output lines, operating at RS232 voltage levels, are also provided to allow a receiver to be linked to a transmitter to form a base station.
Table 1 Facilities Port Connections Inputs: Squelch Defeat Rx Disable Bit Interruptive Test
Outputs: Line out (+) Line out (-) Squelch Common Squelch RSSI Ready Tape Output Unregulated Supply Squelch output
Front Panel Interface 15 An 8-bit data bus and associated control signals are provided to drive the Front Panel LCD module with separate lines also provided to drive the LEDs and to read the rotary encoder. An RS232 asynchronous serial port provides the diagnostics link.
Analogue Control Interfaces
Digital Control Interfaces 18 To interface to the Rx RF module, digital I/O signals, as shown in Table 2, are used. Table 2 Digital I/O Signals Outputs
Inputs
Filter Value (5 bits)
BIT Synth Lock
Narrow/Wide
8.33 (Rx RF)
BIT Control (3 bits)
Tx/Rx Detect
Power Down Synth Control (4 bits)
RX RF MODULE 19 This module combines a synthesiser, an RF converter and an IF filter/converter onto one PCB.
RF Converter 20 The RF Converter section converts the RF input signal down to the IF frequency. Two digitally tuned
27 A BIT output signal (BIT Synth Lock) is provided when the synthesiser is in lock.
BIT 28 The Rx RF module is able to provide a module interruptive BIT to determine if it is at fault. This is done by injecting a noise signal, controlled by the DSP module via the BIT Control line, into the front end of the RF conversion stage, after the RF AGC. The RF AGC is held low during this test to prevent antenna radiation. The noise source is a broadband VHF oscillator on the Rx RF module. The noise signal should pass through the RF and IF conversion stages to be demodulated by the DSP module as would a real signal.
FRONT PANEL MODULE 29 The Front Panel module consists of the following elements:
LCD Module 30 A 16 character by 4 lines liquid crystal display module with backlight displays the radio menu system. It is controlled by an 8-bit data bus from the DSP module accompanied by 3 control lines (a separate control line is used to switch the backlight on and off).
RECEIVER POWER SUPPLY MODULES 35 The power supply is to run off ac mains or dc backup. If ac is present then it is used as the power source and an ac detect output is asserted. If ac is not present then the input source is automatically switched to dc. If dc is present then a dc detect output is asserted. 36 The ac derived supply is provided by a proprietary switched mode power supply (PSU module). A regulator module provides the ac/dc change-over, on/off switch connection and supply regulation. 37 A low voltage on/off switch is fitted to the receiver’s rear panel. The switch operates relays that isolate the dc supply and output from the ac rectifier. When the switch is in the on position, the power supply outputs are switched through to the receiver’s circuitry. Note that with the switch in the off position power is still applied to the receiver but not switched through to the receiver’s circuitry. 38 The power supply dc outputs are as follows: +5 V +15 V -15 V Unregulated dc (nominally 28 V).
EXTERNAL CONNECTORS AND FUSES
EXTERNAL CONNECTORS 39 This sub-section describes the external connectors fitted to the receiver. These connectors are:
Reference connector
Headset/diagnostics connector
CN5 Facilities rear panel connector
CN6 MARC rear panel connector
CN7 Computer rear panel connector
ac input connector
dc input connector.
Reference Connector 40 This is an SMB jack socket that allows a high impedance frequency counter to monitor the receiver's
Table 3 Microphone/Headset Connections Headset/Diagnostics Connector Pin Number
Signal
Notes
1
Ground
0 volt.
5
Headset drive
Maximum = 3 volt peak-to-peak. 200 ohm output impedance.
Table 4 Diagnostics PC Connections Headset/Diagnostics Connector Pin Number
Signal
Notes
2
Transmit data
RS232
4
Receive data
RS232
7
Ground
0 volt
Facilities Connector CN5 43 A 15-way D-type socket used primarily to connect remote signals when the receiver operates in
Table 5 Facilities Connector CN5 Pin-Out Pin Number
Signal Name
Description
1
Ground
0 volt.
2
Line Out (+)
3
Line Out (-)
Pins 2 and 3 are a 600 ohm balanced audio output. The output level is adjustable between -30 dBm and 0 dBm.
4
Squelch Defeat
An input signal to the receiver that, when active, disables the receiver's squelch circuits. This is a TTL input pulled-up to 5 V. The active polarity is set from the front panel.
5
Squelch Relay Common
6
Squelch Relay Output
Pins 5 and 6 are a relay circuit that operates when a signal, above the squelch threshold, is received. This circuit can switch voltages in the range -50 to +50 V (100 mA maximum) and can be configured, at the front panel, to be normally open or normally closed. Note that the configuration follows the polarity of the squelch indication signal (see the T6R User Guide for more detail).
7
Squelch Indication
8
Ground
9
Un
lated Su
This grounding output, when active, indicates a signal above the squelch threshold is being received. The active polarity is set from the front panel. 0 volt.
ly
A d
ut
t s
ply bet
21.6
d 32 volt (
mi
ll
MARC Port CN6 45 A 9-way D-type socket used to connect remote signals to a MARC system or other compatible control and data system. The pin-out of this connector is given in Table 6.
MARC connector CN6 as seen when looking at the rear panel. Connections should be made using a 9-way D-type plug, PAE part number: 20-01090100 (plug), and 20-09090101 (cover).
Table 6 MARC Connector CN6 Pin-Out Pin Number
Signal Name
Description
1
Ground
0 volt.
2
Line Out (+)
3
Line Out (-)
Pins 2 and 3 are a 600 ohm balanced audio output. The output level is adjustable between -30 and 0 dBm. (These pins are wired internally to the Facilities connector pins 2 and 3)
Computer port CN7 as seen when looking at the rear panel. Connections should be made using a 25-way D-type plug, PAE part number: 20-01250100 (plug), and 20-09250101 (cover).
Table 7 Computer Port CN7 Pin-Out CN7 Pin Number 1
Signal Name
Level
Input or Output
Ground
0 volt
-
2
Serial 0 TXA
RS422
Output
3
Serial 0 TXB
RS422
Output
4
Serial 0 RXA
RS422
Input
5
Serial 0 RXB
RS422
Input
6
Serial 0 CLA
RS422
Output
7
Serial 0 CLB
RS422
Output
8
Serial 1 TXA
RS422
Output
AC Input Connector 47 A 3-pole IEC chassis plug for connecting the ac input supply. The plug has an integral 20 mm fuse (F2) that protects the Line (L) input circuit. The fuse is rated at 3.15 amps (see Section 5 for further detail).
AC Connector
DC Input Connector 48 A 3-pole chassis plug for connecting the dc input supply. Connector pins are detailed in the following diagram:
Section 3 Paragraph 1 4 5 6 7 8 9 10 11 12 14 15 16 18 19 20 21 22 23 24 25
Introduction Tools, materials and test equipment required SCHEDULE MAINTENANCE Schedule maintenance procedure Cleaning the equipment Security of external connections Setting the receiver’s internal reference frequency To initiate an interruptive BIT test ac and dc change-over check DISMANTLING AND ASSEMBLY INSTRUCTIONS Introduction Top cover Removing and refitting the DSP module Removal Refitting Removing and refitting the PSU Regulator module Removal Refitting Removing and refitting the power supply unit (PSU) Removal Refitting Bottom cover
Maintenance
(3)
WHEN THE POWER SWITCH IS SET TO THE OFF POSITION, LETHAL VOLTAGES ARE STILL PRESENT IN THE RECEIVER'S INTERNAL POWER SUPPLY CIRCUITRY. TO ENSURE SAFE WORKING, THE AC AND DC INPUT SUPPLIES MUST BE DISCONNECTED FROM THE RECEIVER.
CAUTIONS ... (1)
This equipment contains static sensitive devices. The correct handling precautions must be observed to avoid static charges that may damage these devices. Failure to do so can cause irreparable damage to devices.
INTRODUCTION 1 This section covers maintenance tasks that include schedule maintenance, dismantling and assembly instructions and fault finding. Due to the complexity of most modules the recommended policy is repair by replacement (see section 5 for spare parts listing). A faulty module may be traced by aid of the front panel LCD and Scroll/Select control; VFP or MARC. Note ... Access to a PC and the maintenance kit (PAE part number 70-6100MKIT) is essential when fitting
SCHEDULED MAINTENANCE 5 PAE recommends that this is carried out at twelve-monthly intervals. Schedule maintenance comprises:
Ensuring the equipment is clean (see Paragraph 7).
Ensuring that the external connectors are securely fitted to the receiver (see Paragraph 8).
Checking and resetting (if required) the receiver's frequency standard (see Paragraph 9).
Performing a BIT interruptive test (see Paragraph 10).
Performing an ac and dc change-over check (see Paragraph 11).
SCHEDULE MAINTENANCE PROCEDURE 6 The procedure, detailed in the following paragraphs, should be followed when carrying out schedule maintenance.
Cleaning the Equipment 7
Remove all dust and dirt from the equipment's exterior using the cleaning cloths and camel hair
Setting the Receiver’s Internal Reference Frequency 9 Use the following procedure to set the receiver’s internal reference frequency. Note that references to the switch in the procedure mean the Scroll/Select switch. a.
Connect a high impedance frequency counter to the front panel Reference connector.
b.
From the Main screen, press the switch to display the Options menu. Turn the switch until Configure is highlighted. Press the switch.
F r e q u e n c y C h a n n e l C o n f
i g u r e
B I T
c.
Ensure the Configure menu is displayed. Turn the switch until Settings is highlighted, then press the switch.
S e t
t
S / W
Check that the Settings menu is displayed and turn the switch until Reference Freq is highlighted. Press the switch.
t
E x i
t
i n g s V e r s i o n s
S t a n d b y B a c k
d.
E x i
M o d e R e f e r e n c e
F r e q
To Initiate an Interruptive BIT Test 10 Use the following procedure to initiate an interruptive BIT test from the receiver’s front panel. Note that references to the switch in the procedure mean the Scroll/Select switch. a.
From the main screen, press the switch to display the Options menu. Turn the switch until BIT is highlighted. Press the switch.
F r e q u e n c y C h a n n e l C o n f
i g u r e
B I T
b.
Ensure the BIT menu is displayed. Turn the switch until BIT Initiate is highlighted, then press the switch.
B I T
I n i
t
B I T
V i e w
E T I
h h h h h : m m
During the test, which takes approximately two seconds, the testing screen is displayed. At the end of testing the BIT View menu will be displayed. If a fault is found the front panel Alarm indicator will also be lit (see Fault Diagnosis sub-section, Page 14).
T e s t P l
e a s e
t
E x i
t
i a t e
B a c k
c.
E x i
i n g W a i t
DISMANTLING AND ASSEMBLY INSTRUCTIONS
INTRODUCTION 12 This sub-section provides the user with detailed instructions on the removal and replacement of modules and assemblies. Access to a PC and the maintenance kit (PAE part number 70-6100MKIT) is essential when carrying out these instructions. 13 The receiver’s modules and assemblies are accessed by removing the top and bottom covers. Both the top and bottom covers are secured by 13 captive screws. To remove a module from the receiver, follow the instructions detailed in the following paragraphs (see Section 6, Fig. 4 for module locations when covers are removed).
CAUTIONS ... (1)
When removing or refitting modules, observe anti-static handling precautions.
(2)
Do not change any potentiometer or trimmer settings. These have been set using specialist equipment.
(3)
The receiver uses the following Molex KK connectors: CN7 on the Power Supply Regulator module
TOP COVER 14 To remove the top cover, locate and unscrew the 13 captive fasteners securing the top cover to the mainframe. Access can then be gained to the following modules:
DSP module
Power Supply Unit (PSU) module
PSU Regulator module.
REMOVING AND REFITTING THE DSP MODULE 15 The DSP module is located as shown in Section 6, Fig. 4. A module removal diagram is shown in Fig. 5.
Removal 16 Before attempting to remove the DSP module, and if possible, save the equipment settings. To achieve this connect a PC, with the VFP software loaded, to the radio. With the VFP software active, use the VFP Equipment Profiles screen to upload the radio settings to a specified file. 17 Ensure that the receiver power is switched off at the rear mounted POWER switch and the receiver
b. Ensure the module’s interface connectors CN7, CN5 and CN6 are located correctly and are aligned with the screw holes in the rear panel; do not secure them at this time. c.
Fit the seven M3 x 8 captive washer screws that secure the module to the receiver’s mainframe.
d.
Using a nut spinner tool, secure the interface connectors CN7, CN5 and CN6 with the six screwloc 8 mm 40 UNC screws removed during the removal procedure.
e.
Refit the following connectors to the module: CN1 40-way connector (40-way ribbon cable from Rx RF module) CN3 14-way connector (14-way ribbon cable from PSU Regulator module) CN4 34-way connector (34-way ribbon cable from Front Panel module) CN2 SMB connector (from Rx RF module).
f.
Re-establish the ac and/or dc supplies.
g.
Switch power on at the radio using the rear mounted POWER switch.
h.
Ensure the front panel READY indicator is lit and the ALARM indicator is unlit.
i.
Carry out a BIT interruptive test as detailed in the Schedule Maintenance sub-section, page 5.
j.
If a new module has been fitted, connect the VFP PC to the radio (if not already connected).
b.
Locate the PSU Regulator module and disconnect the following connectors: CN4 14-way connector (14-way ribbon cable to DSP module) CN5 10-way connector (10-way ribbon cable to Rx RF module) CN2 2-way connector (2 wire cable from dc input connector on rear panel) CN1 4-way connector (2 wire cable from power supply) CN7 2-way connector (2-wire loom to rear panel On/Off switch), refer to Caution (3) following Paragraph 13.
c.
Remove the five M3 x 8 mm captive washer screws that secure the module to the receiver’s mainframe.
d.
Remove the module from the chassis.
Refitting 21 To refit the PSU Regulator module, proceed as follows: a.
Locate the module in position. Ensure no wires are trapped by the module.
b.
Secure the module to the receiver’s mainframe using the five M3 x 8 mm captive washer screws removed during the removal procedure.
REMOVING AND REFITTING THE POWER SUPPLY UNIT (PSU) 22 The Power Supply Unit (PSU) is located as shown in Section 6, Fig. 4. A module removal diagram is shown in Fig. 7.
Removal 23 Before attempting to remove the PSU, ensure that the receiver power is switched off at the rear mounted POWER switch and the receiver is isolated from the ac and/or dc input supplies. Then proceed as follows: a.
Remove the receiver’s top cover (see Paragraph 14).
b.
Disconnect the following connectors: CN2 4-way connector (2-wire loom from PSU Regulator module) CN1 5-way connector (1- wire from chassis, 2-wire loom from fuse/ac filter)
c.
Remove the tie-wraps securing the red and black wires to the perforated cover of the PSU.
d.
Remove the three M3 full nuts that secure the module to the receiver’s mainframe.
e.
Remove the module from the chassis.
BOTTOM COVER 25 To remove the bottom cover, locate and unscrew the 13 captive screws securing the bottom cover to the mainframe. Access can then be gained to the Rx RF module.
REMOVING AND REFITTING THE RX RF MODULE 26 The Rx RF module is located as shown in Section 6, Fig. 4. A module removal diagram is shown in Fig. 8.
Removal 27 Before attempting to remove the Rx RF module, ensure that the receiver power is switched off at the rear mounted POWER switch and the receiver is isolated from the ac and/or dc input supplies. Then proceed as follows: a.
Remove the receiver’s bottom cover (see Paragraph 25).
b.
Locate the module and disconnect the following connectors: CN3 40-way connector (40-way ribbon cable from DSP module) CN2 SMB connector (from DSP module)
d.
Connect the following connectors: CN5 10-way connector (10-way ribbon cable from Power Regulator module) CN2 SMB connector (from DSP module) CN3 40-way connector (40-way ribbon cable from DSP module)
e.
Re-establish the ac and/or dc supplies.
f.
Switch power on at the radio using the rear mounted POWER switch.
g.
Ensure the front panel READY indicator is lit and the ALARM indicator is unlit.
h.
Carry out a BIT interruptive test as detailed in the Schedule Maintenance sub-section, Page 5.
i.
Isolate the receiver from the ac and/or dc supplies.
j.
Refit the receiver’s top cover. The receiver can now be returned to service.
REMOVING AND REFITTING THE FRONT PANEL ASSEMBLY PCB 29 The Front Panel assembly is located as shown in Section 6, Fig. 4. An assembly and PCB removal diagram is shown in Fig. 9.
Refitting 31 To refit the Front Panel assembly PCB, proceed as follows: a.
Place the PCB in position at the Front Panel assembly. Ensure the spindle of the control knob and headset/diagnostics connector are correctly located. Secure the PCB to the Front Panel assembly using the eight M3 x 6 mm panhead screws and wavy washers (see Fig. 9 Diagram B).
b.
At the front panel, place the control knob onto the spindle and using a 1.5 mm allen key, secure with the allen head grub screw.
c.
With the Front Panel assembly positioned adjacent to the mainframe, connect the SMB connector CN4.
d.
Secure the Front Panel assembly to the top and bottom of the mainframe box section using the four M3 x 8 mm countersunk screws. Fit the two black equipment handles using the four M5 x 16 mm panhead screws (see Fig. 9, Diagram A).
e.
Route the ribbon cable to the DSP module connector CN4 and connect it.
f.
Re-establish the ac and/or dc supplies.
g.
Switch power on at the radio using the rear mounted POWER switch.
h.
Ensure the front panel READY indicator is lit and the ALARM indicator is unlit.
i.
Ca
t BIT inte
ti
test
detailed in th Schedule Mainte
b-
ctio
Pa
5
FAULT DIAGNOSIS
PROCEDURE 32 If the receiver becomes unserviceable, the faulty module may be traced by the aid of the front panel LCD and Scroll/Select control, VFP or MARC. The following information is in respect of the front panel LCD and Scroll/Select control; VFP information is dealt with in Section 4 of this handbook and MARC information in the MARC User Guide. 33 If the ALARM indicator lights during normal operation, or during interruptive BIT checks, the faulty module(s) may be determined by observing the front panel BIT view menu to ascertain the status of the following parameters:
AC supply
DC supply
Supply volts
Synth lock
Sensitivity
RF filters
35 By turning the Scroll/Select control right or left scrolls the menu through the BIT screens. To scroll forward turn the control right, to scroll backwards turn the control left. The following shows the BIT screens when scrolling forward: a.
Indicates the presence of an ac supply and dc supply. Supply gives the current level of the unregulated supply.
A C
S u p p l y
O N
D C
S u p p l y
O N
S u p p
l y
2 4 V > >
b.
c.
Synth Lock indicates FAIL if the synthesiser is out of lock. Sensitivity checks the sensitivity levels using an internal RF source. Sens gives an estimate of the receiver sensitivity level.
S y n
RF, checks the tuning of the RF filters. IF, checks the IF band filters by checking the response across the tuning range. Audio checks to see if audio is present at the line output.
R F
F
i
l t e r s
P A S S
I F
F
i
l t e r s
P A S S
i
o
O u t
P A S S
t h
S e n s
i
S e n s
.
t
L o c k
P A S S
i v i
P A S S
t y
- 1 0 7 d B m < <
A u d
< <
> >
> >
g.
This screen is the last BIT View screen. Selecting Advise selects the Advise menu. Back displays the BIT menu.
A d v
i
s e
B a c k
< < 36 The Advise menu when selected will show and advise the user of the actions that need to be taken in order to repair a faulty equipment. If no faults are detected 'No Faults' will be displayed. When several failures are listed in the BIT screens, the Advise function analyses the list of failures and recommends the appropriate order in which the modules or components should be checked to locate the fault. 37 Some of the areas that can be checked are as follows:
PSU
RX RF module
DSP module.
38 As an example: a.
The BIT View menu may show the following screen.
S y n t
h
S e n s
i
S e n s
.
t
L o c k
F A I L
i v i
P A S S
t y
- 1 0 7 d B m < <
> >
BIT inoperative 40 Certain fault conditions can result in the BIT facility being inoperative, namely power supply failure or complete failure of the DSP module, Front Panel module, PSU Regulator module or PSU module. Table 1 provides a guide for fault finding under these conditions. 41 Before carrying out the procedures listed in Table 1 check all external connectors for security of attachment and serviceability. Table 1 Non-BIT Fault Finding Guide Fault No.
Symptom
Action
1.
Receiver switched on but no front panel indicators lit
Using the VFP ensure that the radio is not in Boot mode (reference Section 4, Chapter 1, Versions screen function). If in Boot mode, reset to Flash mode.
1a
Fault 1 still apparent
If a supply voltage fault is suspected it is recommended that the fuses F1 and F2, located on the rear panel are checked prior to proceeding any further. If an ac only or dc only supply is connected only the relevant fuse need be checked (see Fig. 1 for locations and Section 5 for fuse details).
1b
Rear panel fuse(s) blown
With dc only connected If fuse F1 blown, replace and try again. If it blows again
Table 1 Non-BIT Fault Finding Guide (continued) Fault No.
Symptom
Action On the DSP module (see diagram A on Page 20), check for the following: (1) Unregulated dc between test point TP18 (+) and the wire link coupling TP6 to TP7 (-). (2) +15 V dc between test point TP4 (+) and the wire link coupling TP6 to TP7 (-). (3) -15 V dc between test point TP2 (-) and the wire link coupling TP6 to TP7 (+). (4) + 5 V dc between test point TP5 (+) and the wire link coupling TP6 to TP7 (-). If all supplies present, suspect the Front Panel PCB or the DSP module. If one or more, but not all, supplies are absent, suspect the PSU Regulator module. If none of these supplies present, remove the ac and/or dc supplies from the radio. Gain access to the PSU Regulator module and check fuse FS1 on the
Table 1 Non-BIT Fault Finding Guide (continued) Fault No.
Symptom
Action
1f
Fuse FS1 on PSU Regulator module blows again
Restore the ac and/or dc supplies and switch the receiver on. Observe fuse FS1 on the PSU Regulator module. If blown, remove ac and/or dc supplies, switch off and replace the PSU Regulator module. If fuse not blown go to step 1g.
1g
Fuse FS1 on PSU Regulator module not blown
Remove ac and/or dc supplies and switch off. Replace CN4. Restore the ac and/or dc supplies and switch the receiver on. Observe fuse FS1 on the PSU Regulator module. If fuse blown, replace the DSP module. If fuse not blown replace the Rx RF module.
2
One or more Front Panel LEDs lit but LCD unlit
Switch the receiver off and remove the ac and/or dc supplies. Replace the Front Panel module.
3
LCD lit but receiver inoperable
Switch the receiver off and remove the ac and/or dc supplies. Replace the DSP module.
Section 4
Virtual Front Panel (VFP)
Paragraph 1
Introduction
INTRODUCTION 1 This section is divided into chapters to separate the VFP operational requirements for receivers configured in different operating modes. The chapters are divided as follows:
Chapter 1 provides VFP operational information that is specific for receivers configured in AM-voice mode.
Chapter 2 onwards will, when available, provide VFP operational information for other operating modes.
2 Each chapter will contain information that is common to all modes of operation in addition to information required for the specific mode of operation.
Section 4 Chapter 1 Paragraph 1 4 5 6 8 10 11 12 13 15 17 23 26 27 30 33 34 35 36 37 38 39
Introduction Installing the virtual front panel (VFP) software Preparing the virtual front panel for use Using the VFP Frequency management management screen Recall function Edit function Store function Setup function Settings screen BIT screen Versions screen Reboot function Erase function Program function Equipment profiles screen Receive function Send function Save function Load function Edit function Print function
VFP AM-Voice Operation
The receiver's receiver's original original operating operating software software can be reloaded reloaded from the VFP should should the DSP module ever be replaced (this facility is not available from the receiver's front panel).
New New oper operat atin ing g soft softwa ware re for for the the rece receiv iver er can can be down downlo load aded ed thro throug ugh h the the VFP VFP (thi (this s faci facili lity ty is not not available from the receiver's front panel).
INSTALLING THE VIRTUAL FRONT PANEL (VFP) SOFTWARE 4
The VFP softwa software re is supplied supplied by PAE PAE on CD-ROM. CD-ROM. To install install the softwa software re onto onto a PC: (a) Ensure Ensure that your PC is running running Windows 95™ or Windows Windows NT and that no applicatio applications ns are running in the background. (b) Insert the CD-ROM containing containing the PAE software into the PC’s PC’s CD-ROM drive. (c) From the the Start Start menu menu select select RUN RUN . (d) (d) In the the RUN di RUN dial alog ogue ue box, box, key key in, in, ‘#:\ ‘#:\SE SETU TUP. P.EX EXE’ E’ and and clic click k on ‘OK’ ‘OK’ (whe (where re # is the the driv drive e lett letter er of the CD-RO CD-ROM M drive). drive). (e) The Set-up procedure procedure then begins. Follow Follow the on-screen instructions. (f) When When comple completed ted,, the set-up set-up progra programm mme e return returns s the PC to the Desktop Desktop and displays displays the following icon:
VFP Format
USING THE VFP 6 To set the the paramete parameters rs applicab applicable le to the radio’ radio’s s operation operation five five main main screens screens can be selec selected ted by the the user; these screens are as follows:
FREQUENCY MANAGEMENT SCREEN 8 The Frequency Management screen allows the receiver's operational frequency to be selected, and allows up to 100 preset frequency channels to be stored in the receiver's internal memory.
Frequency Management Screen
b.
With the selected channel frequency highlighted and using the mouse and keyboard, edit the frequency display to set-in the required frequency.
c.
When the required frequency has been set-in, press the keyboard Enter key. The frequency value and channel number change colour to red. This means the parameter has been changed but has not, as yet, been saved to the radio.
d.
The channel frequency can now be saved to the radio by using the STORE function.
STORE Function 12 Pressing this key, when a row is selected (highlighted), saves that channel frequency to the radio.
SETUP Function 13 Up to 100 frequency channels, having an equal step size between channels, can be automatically stored in the receiver using the SETUP function. Example: 14 To store all 100 kHz spaced channels from 120.000 MHz to 129.900 MHz (100 channels total). Proceed as follows: a.
Select the Frequency Management screen (see Page 4).
SETTINGS SCREEN 15 The Settings screen allows the user to select most of the receiver’s operational settings. Table 1 shows a list of parameters and settings, giving the range adjustment and example settings.
Settings Screen
Table 1 Operational Settings Parameter
Adjustment Range
Comments
Equipment ID
Max 20 characters alpha/numeric & space
LCD Backlight Timeout
15 - 120 s
Frequency Trim
0 - 100%
Equipment Standby State
Off - On
Pull-down menu to select
Front Panel Lock State
Unlocked - Locked
Pull-down menu to select
Marc Baud rate
300 - 9600 baud
Pull-down menu to select
MARC Lock State
Unlocked - Locked
Pull-down menu to select
BIT Initiate Input Polarity
Negative - Positive
Pull-down menu to select
Line Out Level
-30 to 0 dBm
Squelch
-114 to -60 dBm
Squelch Defeat
Off - On
Disable
Off - On
BIT SCREEN 17 The BIT screen allows the user to initiate a BIT test from the VFP. Table 2 shows a list of hardware tested and example test results.
BIT Screen
20 Failures are put to the top of the list and highlighted in red (errors) and orange (warnings). 21 All tests, apart from BIT supply, BIT Marc and BIT Hdlc will show either Pass or Fail. The BIT supply test will cause the value of the internal unregulated supply to be shown. BIT Marc and BIT Hdlc are not strictly tests of serviceability but merely give an indication as to whether there is anything connected to the MARC or HDLC interfaces. 22 If a tested item shows Fail refer to the fault diagnosis information in Section 3 to access the Advise menu via the front panel Scroll/Select switch and LCD of the radio. The Advise screen advises the user of hardware that may be at fault.
VERSIONS SCREEN 23 The Versions screen displays the versions of the radio’s software. Through this screen the operating software and mode software can be updated.
Note ... The Emergency Fill (Fill 4) is for future use. This Fill cannot be erased but can be reprogrammed. It is strongly recommended that before any attempt is made to reprogram this area, you contact PAE.
Reboot Function 26 The Reboot function allows you to change the Main software from Flash to Boot or vice versa. To change the Main software from Flash to Boot proceed as follows: Flash to Boot a. Using the mouse click-on Boot (situated towards the bottom left of the Versions screen display). When selected, a black dot will appear in the selection window. b.
Using the mouse click-on the Reboot control. The following screen will appear:
c.
Using the mouse click-on Yes. The Boot code is downloaded to the radio and the Main Fill software description changes to the Boot. Note that the radio is now inoperative.
28 Only the sectors in the non-shaded areas can be erased. These are the Flash code (main operating software) and Fill code (mode specific software). The erase operation is the same for both these codes. 29 As an example, to erase the Flash code proceed as follows: a.
With the Boot software loaded as Main, and using the mouse, click-on the Flash Fill sector. The line will change colour to blue indicating the sector has been selected.
b.
Using the mouse click-on ERASE (or double click). The following message will be displayed:
c.
Using the mouse click-on Yes. The entry will then be erased and the following message shown. Using the mouse click-on OK, you are then returned to the Versions screen where the Sector 1 entry shows EMPTY.
c.
Using the mouse click-on Browse. Using the Windows Open screen search for the specified file that contains the Flash code. This could be updated code from a floppy disk (the example screen shown above displays A:\flash.bin as the file containing the Flash code).
d.
Using the mouse click-on Download. The flash code is then downloaded to the radio and the
EQUIPMENT PROFILES SCREEN 33 The Equipment Profiles screen allows the user to perform the following functions:
LOAD/SAVE equipment profiles (all settings) to/from a specified file, i.e. T6R.prf.
SEND/RECEIVE equipment profiles (all settings) to/from an equipment.
EDIT any equipment profile setting.
SAVE Function 36 To save a Settings profile from the VFP to a specified file, click-on SAVE. A standard Windows display will prompt you for the file details (folder, file and file type). Once these details are entered press Save in Windows; the settings profile will then be saved to file.
LOAD Function 37 To load a Settings profile from a specified file, click-on LOAD. A standard Windows display will prompt you for the file details (folder, file name and file type). Once these details are entered press Open in Windows; the settings profile will then be loaded into the Profiles screen.
EDIT Function 38 Selecting this key allows any parameter to be edited as follows: a.
With the selected parameter highlighted, click-on EDIT (or double click) using the mouse. The present settings entry can then be edited using the mouse and sometimes, as required, the keyboard. Entries that require the mouse only produce a drop down menu from which the required setting can be selected.
b.
When the required setting has been edited, press the keyboard Enter key. The parameter and setting text change colour to red. This means the parameter has been changed but has not, as yet, been saved to the radio.
Section 5
Parts List
Paragraph 1 2 3 4 5 6
Introduction Accessories supplied with receiver Other available accessories Spare parts Fuses PAE model identification
INTRODUCTION 1 This section details the accessories supplied with the PAE T6R receiver and part numbers of the replaceable modules and assemblies. The PAE T6R receiver’s part number is: B6100.
ACCESSORIES SUPPLIED WITH RECEIVER 2
Accessories supplied with the receiver are as follows:
SPARE PARTS 4
Spare parts consist of fully tested, burnt-in replacement modules and assemblies, Spare Parts DSP Module PSU Regulator Module Front Panel Module Rx RF Module Power Supply Module
Part Number B68-63500010 B68-60000013 B68-63500016 B68-61000012 B69E61000014S
Comments To order spare parts contact PAE by phone, fax or by written request. PAEs address and fax number are detailed on the title page of this handbook
Note ... Access to a PC and the Maintenance Kit (PAE part number 70-6100MKIT) is essential when removing and replacing spare parts.
FUSES 5
Three replaceable fuses are available as detailed below:
Fuse
Fuse Details
PAE Part Number
Location
Section 6
Figures
Figure 1
T6R front and rear panels . . . . . . . . . . . . . . . . . . . DEV083-10/DEV083-11
2
T6R overall block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . D EV083-26
3
Wiring and interconnection diagram . . . . . . . . . . . . . . . . . . . . . GA10035-2
4
Module location diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . D EV083-25
5
DSP module - removal and refitting detail. . . . . . . . . . . . . . . . . DEV083-19-2
6
PSU regulator module - removal and refitting detail. . . . . . . . . . . . DEV083-16-2
7
Power supply unit (PSU) - removal and refitting detail . . . . . . . . . . DEV083-18-2
8
Rx RF module - removal and refitting detail. . . . . . . . . . . . . . . . DEV083-17-2
9
Front panel assembly PCB - removal and refitting detail . . . . . . . . . DEV083-27-2
10
Diagnostic/set-up interconnection lead . . . . . . . . . . . . . . . . . . DEV083-28-2
(DEV083-10 Iss. 2)
(DEV083-11)
T6R Front and Rear Panels Fig. 1
(DEV083-26)
T6R Overall Block Diagram Fig. 2
(GA10035-2)
Wiring and Interconnection Diagram Fig. 3
(DEV083-25)
Module Location Diagram Fig. 4
(DEV-83-19-2)
DSP Module - Removal and Refitting Detail Fig. 5
(DEV083-16-2)
PSU Regulator Module - Removal and Refitting Detail Fig. 6
(DEV083-18-2)
Power Supply Unit (PSU) - Removal and Refitting Detail Fig. 7
(DEV083-17-2)
Rx RF Module - Removal and Refitting Detail Fig. 8
(DEV083-27-2)
Front Panel Assembly PCB - Removal and Refitting Detail Fig. 9
