Park Air Systems B63100HS VHF Ground to air transmitter User Manual

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T6T VHF 100 W Transmitter
User Documentation
Errata
Any errors found in this handbook are promulgated through the Park Air FTP network. Any
user can access this information by logging on to:
ftp.parkairsystems.com
When logged on, select the public (Pub) folder, then the Handbook Errata Sheets folder,
and then select the required equipment model.
[Adobe Acrobat™ must be loaded on your PC to use this facility]
Handbook Title:
T6T VHF 100 W Transmitter User Documentation
Handbook Part Number:
31-3T6T100V
Handbook Version:
2.0
Date of Issue:
February 2005
Equipment Modification Level
Published By:
Park Air Systems
Northfields
Market Deeping
Peterborough PE6 8UE
England
Telephone:
From UK, 01778 345434
From outside UK, 44 1778 345434
Fax:
From UK, 01778 342877
From outside UK, 44 1778 342877
www.parkairsystems.com
Page ii
T6T VHF 100 W Transmitter
Health and Safety
Warnings
A warning is used to indicate possible danger to personnel. Throughout Park Air handbooks, warnings
are indicated by the following symbols:
WARNING
Indicates electrical danger to personnel.
WARNING
Indicates a hazardous material.
WARNING
Indicates a non-ionizing radiation hazard.
WARNING
Indicates a specified danger to personnel.
Cautions
A caution is used to indicate possible danger to the equipment.
Caution
Indicates the presence of electrostatic sensitive devices (ESSD).
Caution
Indicates a specified danger to the equipment.
Trademarks
The following tradenames are used in this handbook.
IBM
This is a registered trademark of International Business Machines.
Microsoft
This is a registered trademark of Microsoft Corporation in the USA and other
countries.
Windows
This is a registered trademark of Microsoft Corporation in the USA and other
countries.
T6T VHF 100 W Transmitter
Page iii
List of Abbreviations
ac
alternating current
RF
radio frequency
AGC
automatic gain control
ROM
read-only memory
AM
amplitude modulation
RSE2
remote site equipment
ATC
air traffic control
RSSI
receiver signal strength indication
BER
bit error rate
volt
BIT
built-in test
VFP
virtual front panel
celsius
VHF
very high frequency
CD
compact disk
VOGAD
voice-operated gain adjusting device
dB
decibel
VSWR
voltage standing wave ratio
dc
direct current
watt
DSB
double sideband
E-BIT
external bit signal
ESSD
electrostatic sensitive devices
Fig
figure
FM
frequency modulation
Hz
hertz
IF
intermediate frequency
kg
kilogramme
kHz
kilohertz
LCD
liquid crystal display
metre
mA
milliamp
MARC
multi-access remote control
mm
millimetre
mW
milliwatt
MHz
megahertz
MSK
minimum shift keying
PA
power amplifier
PC
personal computer
PCB
printed circuit board
pk-pk
peak-to-peak
ppm
parts per million
PSU
power supply unit
PTT
press to transmit
Page iv
T6T VHF 100 W Transmitter
Approvals and Standards T6T VHF 100 Watt Transmitters
Approvals:
The equipment is designed to meet the essential requirements of Directives
1999/5/EC, 89/336EEC as amended by Directive 93/68/EEC, and 72/23/EEC.
Standards:
The following standards are applied:
EMC EN 301 489-1; EN 301 489-22.
Health & Safety, EN 60950, CAN/CSA-C22.2 No. 60950, UL 60950.
Radio EN 300 676, IC RSS141, FCC part 15 and 87.
Telecom CS-03.
This Class B digital apparatus complies with Canadian ICES-003
FCC Statement:
This device has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and the receiver.
-Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
-Consult the supplier or an experienced radio/TV technician for help.
Operation on 8.33 kHz channel spacing is restricted to European customers.
About This Hard Copy
This document, apart from the preface, is a hard copy of the files contained on the CD and comprises
the following parts:
Preface (not on CD)
Introduction
Specification
Operation
Installation
Maintenance.
Page vi
T6T VHF 100 W Transmitter
Back to Transmitter
Main Page
Introduction
This topic gives a brief introduction to the T6T VHF 100 W Multimode Transmitter.
Back to Transmitter
Main Page
Purpose
The T6T VHF multimode 100 W transmitter is intended for use in fixed ground environments such as
airports and en-route centres. The transmitter operates in voice and ICAO defined data modes at
frequencies between 118 and 136.975 MHz.
Dependent on the software loaded into the radio, the following operating modes can be selected:
❑
AM-Voice. All transmitters have this mode
❑
AM-MSK (optional)
❑
Mode 2 (optional)
❑
Mode 3 (optional).
Fig 1 T6T VHF 100 W Transmitter
Models and Part Numbers
The following table identifies the T6T VHF 100 W transmitters:
Description
Part Number
Frequency Range
T6T 100 W standard
frequency coverage high
stability transmitter
B63100HS/NB
118 to 136.975 MHz
Channel
Spacing
(AM-Voice)
25 kHz or
8.33 kHz
Special
Applications
Supports 5-offset
carrier operation
Mechanical Installation
The transmitter fits into an industrial standard 19 inch (483 mm) equipment cabinet and occupies 4U of
space.
T6T VHF 100 W Transmitter
Page 2
Introduction
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Frequency Selection
T6 radios operate with 8.33 kHz and 25 kHz channel spacing. The radios recognize frequencies entered
in ICAO format and automatically adjust to the correct channel spacing. For multichannel operation up
to 100 preset frequency channels can be stored in the radio for immediate recall; any combination of
8.33 kHz and 25 kHz channel spacing can be stored. Any valid operating frequency can be selected from
the radio’s front panel or a compatible remote control equipment.
Operating Parameters
The transmitter’s operating parameters are set using the front panel multi-purpose Scroll/Select switch,
or by using the Park Air Virtual Front Panel (VFP) software in conjunction with a Personal Computer (PC).
Virtual Front Panel
The Virtual Front Panel (VFP) software supplied on CD with the radio is compatible with any PC or laptop
running Windows 2000™ or Windows XP™. The VFP allows changes to a radio’s settings and channel
information, it displays the current BIT state, displays BIT history, allows security locks to be set, and
provides maintenance facilities. A typical VFP presentation is shown in Fig 2. Using the VFP has several
advantages over setting a radio from the front panel; these are:
❑
A profile of the operational settings and channel information can be created, stored on disk, and
then recalled to download into other radios.
❑
A print out of the radio’s profile can be made from the VFP.
❑
The front panel controls can be locked. Front Panel Lock is available only when using the VFP.
Fig 2 Typical VFP Presentation
T6T VHF 100 W Transmitter
Page 3
Introduction
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Intentionally Blank
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Main Page
Specification
This section gives the specification applicable to the T6T VHF 100 W Multimode Transmitter
operating in AM modes, Mode 2 and Mode 3.
All radios operate in AM-Voice mode. Additional software must be loaded to allow AM-MSK,
Mode 2 and Mode 3 operation.
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General Specification
The general specification applies to the T6T 100 watt transmitter irrespective of the selected operating
mode. Separate listings are given for AM modes, Mode 2 and Mode 3. One model of the T6T VHF 100 W
Multimode Transmitter is available as detailed in Table 1.
Table 1 100 Watt T6 Transmitter
Description
Part Number
100 watt, high stability, standard
frequency coverage transmitter
B63100HS/NB
Frequency Range
Special Applications
118 to 136.975 MHz
Supports 5-offset carrier
operation
Frequency accuracy
The frequency accuracy is better than 0.3 ppm.
Number of Channels
The transmitter has a multichannel capability. 100 channels can be stored and recalled.
Power Requirements
The transmitter operates from an ac mains supply, or a dc input supply. When both supplies are
connected, the dc input acts as an automatic backup for the ac mains.
ac input supply
The transmitter operates from a 48 to 62 Hz single-phase ac supply
and automatically adjusts to operate from any supply voltage ranging
from 110 Vac to 230 Vac ±10%. The power consumption figures are
given in Table 2.
dc input supply
The transmitter operates from a dc input supply between 21.6 and
32 V (measured at the radio’s input). Current loading is given in
Table 2.
Table 2 Power Consumption
Requirement
100 Watt Transmitter Normal Operation
ac
dc
Maximum
1000 VA
24 A
Typical
600 VA
17 A
Not Transmitting
90 VA
1.5 A
T6T VHF 100 W Transmitter
Page 2
Specification
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Dimensions and Weight
The dimensions and weight of the 100 watt transmitter are:
Width
483 mm (19 inches).
Height
177.8 mm (7 inches). The height occupies 4U of equipment cabinet
space.
Depth
430 mm (16.9 inches) measured from front panel to rear panel.
465 mm (18.3 inches) measured from front panel to rear RF
connectors.
Weight
25 kg (55 pounds).
Environmental
Temperature range
The transmitter operates to specification across the temperature
range of -20°C to +55°C.
The transmitter can be stored at temperatures ranging from
-30°C to +70°C without causing any damage.
Humidity
The transmitter operates to specification at a relative humidity
between 5% and 90% non-condensing.
Altitude
The transmitter operates to specification up to 15,000 feet.
Additionally it is capable of storage at altitudes up to 50,000 feet
without damage.
Shock and vibration
The transmitter complies with shock and vibration protection
MIL-STD-810E, method 516.4, procedure VI - Bench Handling.
Ventilation
The transmitter is cooled by integral fans, which normally runs at half
speed. At an RF PA temperature of 45°C this is increased to full speed
and at 40°C it reduces to half speed again.
The transmitter power supply units also use internal fans.
Warm up time
T6T VHF 100 W Transmitter
The transmitter is fully operational within 20 seconds but can take up
to 10 minutes to achieve frequency accuracy for offset carrier.
Page 3
Specification
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AM Modes
The transmitter can operate in AM-Voice mode (standard) and AM-MSK mode (optional). The following
specifications apply to both modes unless stated otherwise.
Transmitter RF Characteristics
RF Power Output
The RF carrier output power is adjustable in 2 W steps from 10 W to 100 W. As an option, the maximum
selectable power can be limited. Output power is automatically controlled under the following conditions:
Frequency range
Variations in power remain within 0 to +1 dB over the operational
frequency range.
Low supply voltage
Variations in power remain within ±1 dB for supply voltages between
24 Vdc and 32 Vdc.
High VSWR
Loop error can reduce power progressively by up to 3 dB. Variations
in power remain within ±1 dB into a VSWR of up to 2.5:1. At a VSWR
greater than this the output power may be reduced by 10 dB ±1 dB.
High RF PA temperature
If the RF PA temperature sensor exceeds 80°C the output power is
reduced by 3 dB ±1 dB. If the RF PA temperature sensor exceeds
90°C the transmitter is de-keyed and automatically re-keyed at 70°C.
PA Module Failure
If one of the two PA modules fails, the transmitter will continue to
operate at half power, 50 watts.
Duty Cycle
Both modes
Channel Spacing
AM-Voice mode
AM-MSK mode
Offset Carrier
AM-Voice mode
AM-MSK mode
Harmonic Outputs
Both modes
T6T VHF 100 W Transmitter
100% continuous operation.
The transmitter is capable of both 25 kHz channel spacing and
8.33 kHz channel spacing.
25 kHz.
The transmitter is capable of offsetting the carrier frequency to provide
2, 3, 4 and 5-carrier offset.
Offset carrier is not available.
Second harmonic outputs are less than -36 dBm, third harmonic
outputs are less than -46 dBm and fourth harmonic outputs and above
up to 4 GHz, are less than -56 dBm.
Page 4
Specification
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Spurious Outputs
Both modes
Intermodulation
Both modes
The spurious outputs are less than -46 dBm for modulation depths up
to 90%, measured at greater than 500 kHz from carrier in the
frequency range 9 kHz to 4 GHz. There are no coherent spurious
outputs above the spectral mask at less than 500 kHz.
Intermodulation products, caused by an interfering signal with the
same power as the transmitter isolated by 30 dB, are at least -40 dBc
at ≥±150 kHz and -50 dBc at ≥±500 kHz.
Transmitter Modulation Characteristics
The transmitter modulation characteristics are as follows:
Mode
AM-Voice
AM-MSK
Modulation Depth
Both modes
Hum and Noise
Both modes
Frequency Response
25 kHz channel spacing
8.33 kHz channel spacing
Distortion
25 kHz channel spacing
8.33 kHz channel spacing
T6T VHF 100 W Transmitter
AM-Voice mode uses Double Sideband (DSB) Amplitude Modulation
(AM) full carrier; emission designator 6K80A3EJN for 25 kHz
channels and 5K00A3EJN for 8.33 kHz channels.
AM-MSK mode uses Double Sideband (DSB) Amplitude Modulation
(AM) full carrier; emission designator 13K0A2DJN.
The transmitter is capable of modulation depths up to 95%.
The hum and noise is more than 45 dB below the signal level for line
input levels <-13 dBm, and more than 50 dB below the signal level for
line input levels ≥-13 dBm, for a carrier modulated by a 1 kHz signal
with a modulation depth of 90%.
AM-Voice and AM-MSK: The variation in frequency response with
reference to a 1 kHz signal is within +0.5 dB and -1.5 dB across the
frequency range 300 to 3400 Hz. The response is also less than
-20 dB at 100 Hz and below, and less than -30 dB at 4 kHz and above.
AM-Voice only: The variation in frequency response with reference to
a 1 kHz signal is within +0.5 dB and -1.5 dB across the frequency
range 350 Hz to 2500 Hz. The response is also less than -10 dB at
100 Hz and below, and less than -30 dB at 3200 Hz and above.
The total harmonic distortion is less than 5% due to signals with a
modulation depth of 90%, within the frequency range 300 Hz to
3400 Hz.
AM-Voice only: The total harmonic distortion is less than 5% due to
signals with a modulation depth of 90%, within the frequency range
350 Hz to 2500 Hz.
Page 5
Specification
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Residual FM
Both modes
VOGAD
AM-Voice
AM-MSK
Mute
AM-Voice
AM-MSK
Differential Group Delay
AM-MSK
For a test signal of 1 kHz set at 80% modulation depth applied to the
line input of the transmitter, the unwanted peak frequency modulation
does not exceed ±500 Hz.
The VOGAD has an operational range of 30 dB. The VOGAD can be
disabled.
The VOGAD is disabled.
The mute level is set at 15 dB below the average speech line level
setting. The mute can be disabled.
The mute is disabled.
There is less than 60 µs differential group delay for signals in the
range 1200 to 2400 Hz.
Transmitter Control
Transmitter control characteristics are as follows:
Audio Inputs
Voice can be connected to the transmitter via the front panel microphone connector. Voice can also be
connected via the line inputs. Line level setting from -30 to +10 dBm.
PTT Time Out
The time out period is adjustable from 2 to 510 seconds in 2 second steps or it can be disabled.
T6T VHF 100 W Transmitter
Page 6
Specification
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Mode 2
This section gives the transmitter specification applicable to Mode 2 operation. Mode 2 parameters are
identical to AM-Voice mode parameters with the following exceptions:
RF Power Rise Time
The transmitter produces more than 90% of full power output within the first 2 symbols of the power
stabilization segment, which is the first segment of the training sequence and consists of 4 symbols each
representing 000.
RF Power Decay Time
The output power decays by more than 20 dB within 2.5 symbols of the middle of the final symbol.
Channel Spacing
25 kHz channel spacing only.
Transmitter Modulation Characteristics
Mode 2 uses Carrier Sense Multiple Access (CSMA) differentially encoded 8-phase shift keying
(D8PSK), using a raised cosine filter with α=0.6 (nominal value), emission designator 14K0G1DE.
Information is differentially encoded with 3 bits per symbol transmitted as changes in phase rather than
absolute phase. The data stream is divided into groups of 3 consecutive data bits, least significant bit
first. Zeros are padded to the end of transmissions if needed for the final channel symbol.
Modulation Rate
The symbol rate is 10,500 symbols/second (±0.005%), resulting in a nominal bit rate of 31,500 bits/s.
RMS Phase Error
The RMS phase error is less than 3°. The error vector magnitude is less than 6%.
Phase Acceleration
The total frequency change during the transmission of the unique word is less than 10 Hz. After this, the
phase acceleration is less than 500 Hz/s.
T6T VHF 100 W Transmitter
Page 7
Specification
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Mode 3
This section gives the transmitter specification applicable to Mode 3 operation. Mode 3 parameters are
identical to AM-Voice mode parameters with the following exceptions:
RF Power Rise Time
The transmitter produces more than 90% of full power output within the first 2 symbols of the power
stabilization segment, which is the first segment of the training sequence and consists of 4 symbols each
representing 000.
RF Power Decay Time
The output power decays by more than 20 dB within 2.5 symbols of the middle of the final symbol.
Channel Spacing
25 kHz channel spacing only.
Transmitter Modulation Characteristics
Mode 3 uses Time Division Multiple Access (TDMA) differentially encoded 8-phase shift keying (D8PSK),
using a raised cosine filter with α=0.6 (nominal value), emission designator 14K0G7WET. Information is
differentially encoded with 3 bits per symbol transmitted as changes in phase rather than absolute phase.
The data stream is divided into groups of 3 consecutive data bits, least significant bit first. Zeros are
padded to the end of transmissions if needed for the final channel symbol.
Modulation Rate
The symbol rate is 10,500 symbols/second (±0.005%), resulting in a nominal bit rate of 31,500 bits/s.
RMS Phase Error
The RMS phase error is less than 3°. The error vector magnitude is less than 6%.
Phase Acceleration
The total frequency change during the transmission of the unique word is less than 10 Hz. After this, the
phase acceleration is less than 500 Hz/s.
T6T VHF 100 W Transmitter
Page 8
Specification
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Main Page
Operation
This topic describes the transmitter’s operating controls and indicators.
It also details how to set up the transmitter’s operating parameters.
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Main Page
Controls, Indicators and Front Panel Connectors
This section describes the transmitter’s controls, indicators and front panel connectors.
Front Panel
The transmitter’s front panel is illustrated below.
LCD
Scroll/Select Switch
READY
ALARM
TRANSMIT
REFERENCE
F r e q 1 1 8 .0 0 0 M H z
Ch 100
+7.3kHz
Mode AM Voice
Pwr
STANDBY
SCROLL/
SELECT
MICROPHONE/
DIAGNOSTICS
Scroll/Select Switch and LCD
The Scroll/Select switch is used in conjunction with the LCD to select most of the transmitter's operational
settings. During normal operation, the LCD shows the operating frequency, the channel number (if the
channel store facility is used), the carrier offset (if used), and displays a graphical representation of
instantaneous peak power.
The example LCD screen above shows the transmitter operating on 118.000 MHz; the frequency has
been preset as channel 100 and offset at +7.3 kHz.
Ready Indicator
A green indicator that lights when the transmitter is ready for use and no BIT faults have been detected.
Transmit Indicator
An amber indicator that lights when the transmit circuit is keyed and producing output power.
Alarm Indicator
A red indicator that either flashes, or lights, when a BIT fault has been detected. BIT indications are
classified as either Alarms or Alerts.
If an ‘alert’ condition is detected, the Alarm indicator flashes, the Ready indicator remains lit, and the
transmitter remains operational. A BIT ‘alert’ is indicated if:
❑
The transmitter RF output power has reduced from its setting by more than 1 dB but not more than
3 dB.
❑
The supply volts falls below a pre-defined level.
Any other BIT condition results in an alarm. When detected, the Alarm indicator lights and the Ready
indicator becomes unlit; the transmitter cannot be used.
T6T VHF 100 W Transmitter
Page 2
Operation
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Standby Indicator
A red indicator that lights when the transmitter is in standby mode. When in standby mode, most of the
radio's circuits are inactive, the front panel LCD is blanked, and the transmitter cannot be keyed.
Standby mode is selected and deselected using the front panel Scroll/Select switch and LCD, by initiating
an instruction through a MARC system, through a T6 controller or through the VFP. For details of front
panel selection and deselection see page 14.
Reference Connector
An SMB jack socket that allows a frequency counter to monitor the transmitter's reference frequency.
This connector is used only for maintenance purposes. The instructions for checking and adjusting the
reference frequency are given in the Maintenance section.
Microphone/Diagnostics Connector
A dual purpose connector that allows either a microphone, or a PC, to be connected to the transmitter.
The connector is a 7-pin self-locking DIN socket; the pin-out is shown in Table 1.
A microphone is fitted to this connector to enable the transmitter to be operated in AM local mode. The
connections are detailed in Table 1. A PC can also be connected to allow the VFP to be displayed. Using
the VFP is detailed in the Maintenance section. The PC connections at the transmitter are shown in
Table 2 on the following page.
Viewed from front
Table 1 Microphone/Diagnostics Connector - Audio Connections
Pin
Number
Input or
Output
Signal
Description
Microphone ground
0 V.
Microphone PTT
Input
0 V to PTT.
Sidetone
Output
0 to 3 V pk-pk.
Microphone input
Input
2 to 35 mV rms on Passive setting and 8 to 140 mV rms on
Active setting to remain in VOGAD range.
Ground
0 V.
Table 2 Microphone/Diagnostics Connector - PC Connections
Pin
Number
Signal
Transmit data
T6T VHF 100 W Transmitter
Input or
Output
Output
Description
RS232, 115200 baud, 8 data bits, 1 stop bit, no parity, no
handshaking.
Page 3
Operation
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Table 2 Microphone/Diagnostics Connector - PC Connections
Pin
Number
Input or
Output
Signal
Description
Receive data
Input
RS232, 115200 baud, 8 data bits, 1 stop bit, no parity, no
handshaking.
Ground
0 V.
Rear Panel Power Switch
The rear panel power switch is a 2-way rocker switch used to select between power on, and standby.
WARNING
Dangerous Voltages
When the Power switch is set to the Standby position, dangerous voltages are still present
in the transmitter's internal power supply circuitry. To ensure safe working, the transmitter
must be isolated from the ac and dc input supplies.
= On
T6T VHF 100 W Transmitter
= Standby
Page 4
Operation
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Setting Up and Operation
Introduction
Setting up the transmitter involves using the front panel Scroll/Select switch to specify the operating
parameters.
Operating parameters can also be set using the Virtual Front Panel (VFP), through a Multi-Access
Remote Control (MARC) system, from an associated T6 controller. VFP operation is described on this
disk under Maintenance; MARC and T6 controller functionality is described in separate handbooks.
Table 9 on page 32 details the functions and parameters that can be set from all sources.
No attempt to set up the transmitter should be made until the installation procedures, given in the
Installation topic, are completed.
Normal Operation
During normal operation, the LCD displays the Main screen. This screen shows the operating frequency,
the channel number (if the channel store facility is used), the carrier offset (if used), and displays a
graphical representation of output power when the transmitter is keyed. If the transmitter has been set to
Standby mode, which is shown by the front panel Standby indicator being lit, the LCD is blanked.
LCD
Scroll/Select Switch
READY
ALARM
TRANSMIT
REFERENCE
F r e q 1 1 8 .0 0 0 M H z
Ch 100
+7.3kHz
Mode AM Voice
Pwr
STANDBY
SCROLL/
SELECT
MICROPHONE/
DIAGNOSTICS
Using the Scroll/Select Switch
The Scroll/Select switch (referred to throughout this section as the ‘Switch’) is used to leave the Main
screen and display the Control screen (see page 8). Further use of the Switch displays various selection
menus and allows the required parameters to be set. The switch has three actions: it can be turned
clockwise, anti-clockwise, or momentarily pushed in.
T6T VHF 100 W Transmitter
Page 5
Operation
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Screen Protocol
The following protocol is applicable to all screens described in this document.
Main Screen
During normal operation, the Main screen (an example of which is shown below
whilst the transmitter is transmitting) is displayed.
F r
e q
1 1 8 .
C h 1 0 0
M o d e
A M
P w r
0 0 0 M H z
+ 7 .
3 k H z
V o i
c e
Switch
Refers to the front panel Scroll/Select switch. The switch is turned clockwise to scroll
through fields from left to right, and from top to bottom. The switch is turned
anti-clockwise to scroll through fields from right to left, and from bottom to top. The
switch is pressed to make a selection.
Time out
If during any setting up procedure the Scroll/Select switch is not operated for
30 seconds, the display returns to the Main screen. If editing any parameter has not
been completed, the transmitter stays on the original setting.
>>
Indicates more fields are available other than those currently displayed. To access
those fields, turn the switch clockwise through the last displayed field.
<<
Indicates more fields are available other than those currently displayed. To access
those fields, turn the switch anti-clockwise through the first displayed field.
Back
When Back is selected, you are returned to the previous menu.
Exit
When Exit is selected, you are returned to the Main screen.
Menu System
The front panel control of the radio is implemented through a hierarchical menu system as shown on the
following page.
T6T VHF 100 W Transmitter
Page 6
Operation
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F r
e q
1 1 8 .
0 0 0 M H z
C h 1 0 0
M o d e
A M
P w r
V o
c e
Control Screen
Main Screen
(Example)
Displayed during normal
transmitter operation
Menu Lock Screen
Configure the transmitter
operating parameters, access
the BIT facility or view the
software configuration.
Frequency
Channel
Settings
BIT
S/W Config
Standby
Set the
transmitter
operating
frequency
Set or recall up
to 100 preset
frequency
channels
Set the
transmitter
operational
settings
Initiate a BIT
test and view
results
View the
transmitter
software
configuration
Enter or Exit
standby mode
Backlight
Ref Freq
Band Edges
Adjust the
display’s
backlight
Adjust the
transmitter
reference
frequency
Set up the
transmitter
band edges
AM-Voice Mode
Settings
(see page 17)
AM-MSK Mode
Settings
(see page 19)
Mode and
Mode
Settings
Select Mode
Polarities
Set the active
polarity for
certain hardwire
connections
Digital Modes
(see page 20)
Menu System
T6T VHF 100 W Transmitter
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Operation
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Menu Lock Screen
A security facility available only from the VFP allows the transmitter front panel to be ‘locked’. When this
facility is active, no operational settings can be made from the front panel until an ‘unlock’ command is
sent from the VFP.
The following screen is displayed when ‘lock’ is active, and the front panel switch is pressed.
S E C U R I
F r
T Y
o n t
M E S S A G E
P a n e l
L o c k e d
O K
To exit the system lock screen:
❑
Select OK, then press the switch. You are returned to the Main screen.
or,
❑
Wait for the 30 second time out to expire. You are returned to the Main screen.
Control Screen
The Control screen is entered from the Main screen by pressing the switch. The following screen is
displayed:
Change the transmitter operating frequency.
F r
e q u e n c y
Store or recall preset channel frequencies.
C h a n n e
Select operating mode and mode settings.
S e t
E x
n g s
> >
Initiate a BIT test and view results.
B I
View software configuration.
S /
Enter or exit standby mode.
S t
a n d b y
E x
T6T VHF 100 W Transmitter
Page 8
C o n f
< <
Operation
Back to Transmitter
Main Page
Notes for Setting Up the Transmitter
The following notes should be read before setting up the transmitter. They advise on the special
frequency display when using 8.33 kHz channel spacing, and give guidance on the optimum line level
settings. Note that for operation in the United States of America, this equipment is certified only for
operation using 25 kHz channel spacing.
Front Panel Display for 25 kHz and 8.33 kHz Channel Spacing
When setting the operating frequency of the transmitter and 8.33 kHz channel spacing is required, the
displayed frequency differs from the actual channel frequency. Table 3 shows the pattern used for
25 kHz and 8.33 kHz spaced channel frequencies from 118.000 MHz to 118.141 MHz. The pattern is the
same for any frequency within the transmitter's frequency range. The display conforms to ICAO
convention for 8.33 kHz operation.
Table 3 25 kHz and 8.33 kHz Channel Spacing Displays
Actual Frequency
(to 4 decimal places)
Channel Spacing
Displayed Frequency
at Transmitter's Front Panel
118.0000 MHz
118.0000 MHz
118.0083 MHz
118.0166 MHz
25 kHz
8.33 kHz
8.33 kHz
8.33 kHz
118.000 MHz
118.005 MHz
118.010 MHz
118.015 MHz
118.0250 MHz
118.0250 MHz
118.0333 MHz
118.0416 MHz
25 kHz
8.33 kHz
8.33 kHz
8.33 kHz
118.025 MHz
118.030 MHz
118.035 MHz
118.040 MHz
118.0500 MHz
118.0500 MHz
118.0583 MHz
118.0666 MHz
25 kHz
8.33 kHz
8.33 kHz
8.33 kHz
118.050 MHz
118.055 MHz
118.060 MHz
118.065 MHz
118.0750 MHz
118.0750 MHz
118.0833 MHz
118.0916 MHz
25 kHz
8.33 kHz
8.33 kHz
8.33 kHz
118.075 MHz
118.080 MHz
118.085 MHz
118.090 MHz
118.1000 MHz
118.1000 MHz
118.1083 MHz
118.1166 MHz
25 kHz
8.33 kHz
8.33 kHz
8.33 kHz
118.100 MHz
118.105 MHz
118.110 MHz
118.115 MHz
118.1250 MHz
118.1250 MHz
118.1333 MHz
118.1416 MHz
25 kHz
8.33 kHz
8.33 kHz
8.33 kHz
118.125 MHz
118.130 MHz
118.135 MHz
118.140 MHz
T6T VHF 100 W Transmitter
Page 9
Operation
Back to Transmitter
Main Page
Line Level Setting
The input line level setting displayed on the front panel is equivalent to the average speech level with a
peak-to-average ratio of 13 dB. This corresponds to the level specified for the lines.
When testing the transmitter using a sine wave, the line input level should be set to 10 dB above the line
level setting. The VOGAD and mute thresholds are preset at 10 dB and 15 dB respectively below the line
level setting.
Table 4 shows the relationship between the input line level, VOGAD threshold and mute threshold.
Table 4 Relationship Between Line Level, VOGAD Threshold and Mute Threshold
Line Level Setting
(dBm)
Average Speech
Level (dBm)
Sine Wave Level
(dBm)
VOGAD Threshold
(dBm)
Mute Threshold
(dBm)
+10
+10
+20
-5
+5
+5
+15
-5
-10
+10
-10
-15
-5
-5
+5
-15
-20
-10
-10
-20
-25
-15
-15
-5
-25
-30
-20
-20
-10
-30
-35
-25
-25
-15
-35
-40
-30
-30
-20
-40
-45
T6T VHF 100 W Transmitter
Page 10
Operation
Back to Transmitter
Main Page
Changing the Transmitter Operating Frequency
The transmitter frequency can be changed in two ways: either from the frequency screen, or by recalling
a preset channel. This procedure details the use of the Frequency screen.
(1)
From the Control screen, select
frequency to display the Frequency
screen.
(2)
Turn the switch to highlight the digit to
be changed, then press the switch.
(3)
Turn the switch until the required digit
is shown, then press the switch.
(4)
Repeat until the required frequency is
shown, then highlight OK and press the
switch.
(5)
Only frequencies that fall between the
band edge settings can be selected.
T6T VHF 100 W Transmitter
F r
e q
C a n c e
Page 11
1 1 8 .
0 0 0 M H z
O K
Operation
Back to Transmitter
Main Page
To Store and Recall Frequency Channels
Up to 100 frequency channels can be stored in the transmitter.
To store a Channel Frequency:
(1)
(2)
(3)
(4)
From the Control screen, select
Channel to display the Channel
screen. Highlight Channel, press the
switch and then turn it until the required
channel number is displayed; press the
switch.
Highlight the MHz frequency value
(see Example 2) press the switch and
then turn it until the required MHz value
is shown. Press the switch.
Highlight the kHz frequency value (see
Example 3), press the switch and then
turn it until the required kHz value is
shown. Press the switch.
Highlight Store and press the switch.
The new frequency is now stored in the
selected channel number.
(2)
(3)
F r
From the Control screen, select
Channel to display the Channel
screen.
To make the transmitter operate on
any
preset
channel
frequency,
highlight Channel and press the switch.
Turn the switch until the required
channel
number/frequency
is
displayed, then press the switch.
Turn the switch to highlight Recall, then
press the switch. Exit the screen. The
transmitter now operates on the
recalled channel frequency.
1 0 0
e q
R e c a
1 2 1 .
5 0 0 M H z
B a c k
E x
Channel Screen - Example 1
C h
1 0 0
F r
e q
S t
o r
1 1 8 .
0 0 0 M H z
B a c k
E x
Channel Screen - Example 2
C h
F r
To recall a Stored Frequency Channel:
(1)
C h
1 0 0
e q
O u t
1 1 8 .
d e
0 0 0 M H z
B a n d E d g e
B a c k
E x
Channel Screen - Example 3
C h
F r
1 0 0
e q
n v a
B a c k
1 1 8 .
0 0 0 M H z
o r
M o d e
E x
Channel Screen - Example 4
Notes:
If a frequency outside the band edge limits is
entered, a message (see Channel Screen Example 3) is displayed.
If a frequency not valid for the mode of
operation is entered, a message (see Channel
Screen - Example 4) is displayed.
T6T VHF 100 W Transmitter
Page 12
Operation
Back to Transmitter
Main Page
To Initiate a BIT Test
Use the following procedure to initiate an interruptive BIT test from the transmitter front panel. A BIT test
cannot be initiated while the transmitter is keyed. After a BIT test has been run, the BIT screen is
displayed (see AM-Voice and AM-MSK BIT Screen on page 25). An interruptive BIT test cannot be
initiated in Mode 2 or Mode 3.
During an interruptive BIT test, the transmitter radiates modulated carrier waves at the set power.
Users should therefore obtain the necessary authority before initiating a test.
If the test is to be carried out with the antenna disconnected, ensure a load is fitted to the
transmitter's antenna connector.
In order to test the line input stages, an internally generated 1 kHz tone is injected into the line input
circuit. Any other audio present on the line input will cause the test to be inaccurate. Therefore the
transmitter must not be keyed during the test.
(1)
(2)
From the Main screen, press the switch to display the Control screen. Turn the switch until BIT
is highlighted. Press the switch.
B I
S /
S t
a n d b y
E x
C o n f
< <
Ensure the BIT menu is displayed. Turn the switch until BIT Initiate is highlighted. Press the
switch.
B I
E T I
A C
E x
(3)
a t
0 0 0 0 0 :
S u p p
0 0 h r
O N
> >
During the test, which takes approximately two seconds, the Testing screen is displayed.
T e s
P l
T6T VHF 100 W Transmitter
e a s e
n g
W a i
Page 13
Operation
Back to Transmitter
Main Page
(4)
On completion, and if the interruptive test was initiated from the front panel, one of the following
screens will be shown.
T e s
S t
a t
u s
P A S S
O K
(5)
Selecting OK takes the user back to the BIT screen.
T e s
S t
F A I
a t
u s
O K
(6)
Selecting OK takes the user back to the BIT screen. The user can then scroll through the screen
to check out transmitter parameters for failure.
Standby Mode
Standby mode is a power saving feature that can be used for non-operational transmitters. When in
standby mode, most of the transmitter's circuits are inactive, the LCD is blanked, and the transmitter
cannot be keyed. To put the transmitter into standby mode, use the following procedure.
When the transmitter is in Standby mode, the red front panel Standby indicator is lit.
To Enter Standby Mode
(1)
From the Control screen select
Standby.
(2)
At the Standby screen, select Yes.
(3)
Check that the display blanks and
the front panel Standby indicator is
lit.
E n t
e r
S t
a n d b y ?
Y e s
N o
To Exit Standby Mode
(1)
Press the Switch.
(2)
Select Yes.
(3)
Check that the Main screen is
displayed and that the front panel
Standby indicator is unlit.
T6T VHF 100 W Transmitter
E x
Y e s
Page 14
S t
a n d b y ?
N o
Operation
Back to Transmitter
Main Page
Settings
Operational settings for the T6T 100 W VHF transmitter are configured at the front panel, through the
VFP, and through an associated MARC system (or compatible control system). Some settings can also
be made remotely via a T6 controller. The Settings screen is entered from the Control screen.
The settings that can be selected at the front panel Settings screen are:
❑
Mode - either AM-Voice, AM-MSK, Mode 2 or Mode 3
❑
Mode settings - allows the selected mode parameters to be set
❑
Polarities
❑
Band edges
❑
Backlight
❑
Reference frequency.
Note that the mode selection, reference frequency and backlight are set from this screen. When mode
settings, polarities and band edges are selected the user is taken to other screens.
M o d e
A M
M o d e
S e t
P o
a r
e s
E x
c e
n g s
Select between AM-Voice, AM-MSK, Mode 2 or Mode 3.
Select to take you to the mode specific Settings menu.
Select to take you to the Polarities menu.
Set the transmitter’s frequency band edges.
E d g e s
F r
B a c k l
E x i
> >
B a n d
R e f
V o
e q
g h t
5 0 .
0 % Align the transmitter’s reference frequency (Note 1).
0 3 0 s
< <
Adjust the LCD’s backlight time out (Note 2).
> >
B a c k
E x i
Notes:
1.
Setting the transmitter reference frequency is a maintenance operation. The current value
should not be reset unless the correct test equipment is connected. See the Maintenance
section.
2.
The LCD backlight can be set for permanently on, off, or timed to stay on for a period between
15 and 120 seconds.
General and mode specific settings, showing default values, are referenced in Table 5 on the following
page. Click on any required parameter by page number for further references.
T6T VHF 100 W Transmitter
Page 15
Operation
Back to Transmitter
Main Page
Table 5 Operational Settings from the Front Panel
Parameter
Mode
Adjustment Range
Factory Default Setting
Further
Reference
Menu lock screen
All
Locked or unlocked
Unlocked
page 8
Enter standby
mode
All
Yes or No
page 14
Exit standby mode
All
Yes or No
page 14
Set mode of
operation
All
AM-Voice, AM-MSK, Mode
2 or Mode 3
AM-Voice
page 15
Set polarities
AM-Voice,
AM-MSK
STD or INV
STD
page 21
Band edges
All
118.000 to 136.975 MHz
118.000 and 136.975 MHz
page 29
LCD backlight
All
15 to 120 s, On or Off
30 s
page 15
RF power
All
10 to 100 W
100 W
page 17
Audio line in level
AM-Voice,
AM-MSK
-30 to +10 dBm
-13 dBm
page 17 and
page 19
Inhibit
AM-Voice,
AM-MSK
On or Off
Off
page 17 and
page 19
PTT (key)
AM-Voice,
AM-MSK
On (key), Off (de-key)
Off
page 17 and
page 19
Tx time out
AM-Voice,
AM-MSK
2 to 510 s or Off
180 s
page 17 and
page 19
Modulation depth
AM-Voice,
AM-MSK
5 to 95%
85%
page 17 and
page 19
Mute
AM-Voice
On or Off
On
page 17
VOGAD
AM-Voice
On or Off
On
page 17
Antenna C/O delay
AM-Voice
AM-MSK
On or Off
On
page 17
Off
page 19
Offset
AM-Voice
0, ±2.5, ±4, ±5, ±7.3, ±7.5,
±8 kHz
0 (No offset)
page 18
Step
AM-Voice
8.33 kHz, 25 kHz or both
25 kHz
page 18
Mic
AM-Voice
Active or Passive
Passive
page 18
Key priority
AM-Voice,
AM-MSK
Local-Remote or
Remote-Local
Local-Remote
page 18 and
page 19
Local PTT
AM-Voice,
AM-MSK
Enabled or Disabled
Enabled
page 18 and
page 19
Remote PTT
AM-Voice,
AM-MSK
Enabled or Disabled
Enabled
page 18 and
page 19
Remote phantom
PTT
AM-Voice,
AM-MSK
Enabled or Disabled
Enabled
page 18 and
page 19
T6T VHF 100 W Transmitter
Page 16
Operation
Back to Transmitter
Main Page
AM-Voice Settings Procedure
During this procedure, the following parameters, applicable to AM-Voice operation, can be set:
❑
RF power output
❑
Audio line input level
❑
Inhibit
❑
PTT on (key) or off (de-key)
❑
Transmitter time out
❑
Modulation depth
❑
Mute (on or off)
❑
VOGAD (on or off)
❑
Antenna c/o delay (on or off)
❑
Offset
❑
Step
❑
Mic
❑
Key priority (local or remote)
❑
Enable or disable local PTT
❑
Enable or disable remote PTT
❑
Enable or disable remote phantom PTT.
AM-Voice Mode Settings Screen
The AM-Voice mode setting screen is accessed from the Settings screen. Use the Scroll/Select switch
to select the parameter, then enter the required setting(s).
Adjustments
P o w e r
L i
n e
n h
E x
1 0 0 W
1 3 d B m
O F F
O F F
T i
M o d
m e o u t
D e p t
E x i
M u t
1 8 0 s
8 5 %
< <
V O G A D
A n t
E x i
Audio line in level between -30 to +10 dBm.
On or Off.
> >
P T T
T X
RF power between 10 W to 100 W.
C /
T6T VHF 100 W Transmitter
D e l
< <
On (key), Off (de-key).
2 to 510 s.
5 to 95%.
> >
O N
On or Off.
O N
On or Off.
O N
On or Off.
> >
Page 17
Operation
Back to Transmitter
Main Page
Adjustments
O f
S t
e p
M i
E x i
s e t
0 k H z
2 5 k H z
P A S S I
K e y
< <
P r
L o c a l
R e m o t
E x i
0 .
o r
P T T
P T T
R e m
< <
P h a n
P T T
V E
0, ±2.5, ±4, ±5, ±7.3, ±7.5, ±8 kHz.
25 kHz, 8.33 kHz or both.
Active or Passive.
> >
L -
Local-remote or Remote-local.
E N
Enabled or Disabled.
E N
Enabled or Disabled.
> >
E N
Return to Settings screen.
B a c k
E x i
T6T VHF 100 W Transmitter
Enabled or Disabled.
< <
Page 18
Operation
Back to Transmitter
Main Page
AM-MSK Mode Settings Procedure
During this procedure, the following parameters, applicable to AM-MSK operation, can be set:
❑
RF power output
❑
Audio line input level
❑
Inhibit
❑
PTT on (key) or off (de-key)
❑
Transmitter time out
❑
Modulation depth
❑
Antenna c/o delay (on or off)
❑
Key priority (local or remote)
❑
Enable or disable local PTT
❑
Enable or disable remote PTT
❑
Enable or disable remote phantom PTT.
AM-MSK Mode Settings Screens
The AM-MSK mode setting screen is accessed from the Settings screen. Use the Scroll/Select switch to
select the parameter, then enter the required setting(s).
Adjustments
P o w e r
n h i
E x
n e
1 0 0 W
1 3 d B m
O F F
O F F
T i
M o d
E x i
m e o u t
D e p t
1 8 0 s
8 5 %
< <
A n t
C /
K e y
P r
L o c a l
E x i
D e l
o r
On or Off.
R e m o t
P T T
P h a n
L -
E N
< <
P T T
On (key), Off (de-key).
2 to 510 s.
5 to 95%.
> >
O N
P T T
R e m
Audio line in level between -30 to +10 dBm.
> >
P T T
T X
RF power between 10 W to 100 W.
On or Off.
Local-remote or Remote-local.
Enabled or Disabled.
> >
E N
Enabled or Disabled.
E N
Enabled or Disabled.
B a c k
E x i
T6T VHF 100 W Transmitter
< <
Page 19
Operation
Back to Transmitter
Main Page
Mode 2 Settings Screen
This is an advisory screen. Pressing OK returns the user to the Main screen.
M o d e 2
a r
p a r
a m e t
e r
s e t
v i
e r
a c e
H L D C
n t
h e
O K
Mode 3 Settings Screen
This is an advisory screen. Pressing OK returns the user to the Main screen.
M o d e 3
a r
T 1 /
p a r
s e t
E 1
a m e t
v i
n t
e r
e r
h e
a c e
O K
T6T VHF 100 W Transmitter
Page 20
Operation
Back to Transmitter
Main Page
Polarities Screens AM-Voice and AM-MSK
A number of remote indication and control signals can be hardwire connected to the transmitter. These
signals include a transmitter ready indication, a PTT control signal, a phantom PTT control signal, a PTT
out indication, a transmitter inhibit control signal, an E-BIT input, a BIT test initiation control signal, an
external VSWR fault indication and antenna C/O. The following paragraphs detail the signals applicable
to the operational mode of the transmitter.
The Polarities screen is accessed from the Settings screen.
AM-Voice and AM-MSK Polarity Settings
Each of ten polarity settings applicable to AM-Voice and AM-MSK can be set to the default STD
(standard) setting or INV (inverted).
The signal connections are shown in Table 6 along with the conditions when STD or INV is selected.
The settings for the PTT Reference voltage are also shown in Table 6.
R e a d y
O u t
S T D
E -
S T D
B I
n h
E x
B I
S T D
> >
S t
a r
R e f
P T T
S T D
+ 1 4 V
S T D
P h a n
P T T
> >
P T T
S T D
O u t
F a s t
E x i
P T T
E x i
S T D
P T T
O u t
< <
E x t
V S W R
A n t
C /
S T D
> >
S T D
O u t
S T D
B a c k
E x i
T6T VHF 100 W Transmitter
< <
Page 21
Operation
Back to Transmitter
Main Page
Table 6 AM-Voice and AM-MSK Polarity Settings
Signal
Connector
Polarity set to STD
Polarity set to INV
Ready Out
Facilities, pin 13
An open collector grounded
output when the radio is ready
to transmit and no BIT faults
are detected.
An open collector high
impedance output when the
radio is ready to transmit and
no BIT faults are detected.
E-BIT In
Facilities, pin 2
TTL input. 0 V indicates an
external fault.
TTL input. 5 V indicates an
external fault.
Inhibit In
Facilities, pin 10
TTL input. 0 V inhibits
transmitter operation.
TTL input. 5 V inhibits
transmitter operation.
BIT Start In
Facilities, pin 11
TTL input. 0 V initiates an
interruptive BIT test.
TTL input. 5 V initiates an
interruptive BIT test.
PTT In
MARC, pin 4
MARC Audio, pin 6
Active when input differs from
reference by more than 10 V.
Inactive when input differs from
reference by less than 1 V.
Maximum input level ±60 V
with respect to reference. Input
will draw no more than 6 mA,
requires at least 1 mA to
operate.
Active when input differs from
reference by less than 1 V.
Inactive when input differs from
reference by more than 10 V.
Maximum input level ±60 V
with respect to reference. Input
will draw no more than 6 mA,
requires at least 1 mA to
operate.
Phantom PTT In
MARC or
MARC Audio, pin 2
Active when input differs from
reference by more than 10 V.
Inactive when input differs from
reference by less than 1 V.
Maximum input level ±60 V
with respect to reference. Input
will draw no more than 6 mA,
requires at least 1 mA to
operate.
Active when input differs from
reference by less than 1 V.
Inactive when input differs from
reference by more than 10 V.
Maximum input level +60 V
with respect to reference. Input
will draw no more than 6 mA,
requires at least 1 mA to
operate.
PTT Out
Facilities, pin 3
Grounding solid state relay.
+60 to -60 V, ac or dc, 100 mA
max, n/o. Activated 20 ms
(±1 ms) before the start of the
power ramp up to allow for the
antenna relay to pull-in time.
Grounding solid state relay.
+60 to -60 V, ac or dc, 100 mA
max, n/c. Activated 20 ms
(±1 ms) before the start of the
power ramp up to allow for the
antenna relay to pull-in time
External VSWR
Input
Facilities, pin 4
TTL input. 0 V active.
TTL input. 5 V active.
Facilities, pin 5
(Common pin 6)
Solid state relay. +60 to -60V,
ac or dc, 100 mA max, n/o.
Activated 35 ms (±1 ms) before
the start of the power ramp up
to allow for the antenna relay
pull-in time.
Solid state relay. +60 to -60V,
ac or dc, 100 mA max, n/c.
Activated 35 ms (±1 ms) before
the start of the power ramp up
to allow for the antenna relay
pull-in time.
(Phan PTT In)
(Ext VSWR In)
Antenna
Changeover
(Ant c/o out)
Continued >>
T6T VHF 100 W Transmitter
Page 22
Operation
Back to Transmitter
Main Page
Table 6 AM-Voice and AM-MSK Polarity Settings (Continued)
Signal
Connector
Polarity set to STD
Polarity set to INV
Fast PTT Output
(antenna
change-over)
MARC Audio, pin 3
Open collector NPN transistor
grounding output, 200 mA max,
n/o.
Open collector NPN transistor
grounding output, 200 mA max,
n/c.
PTT Ref
PTT Ref can be set to +14 V,
0 V or -14 V. PTT. Maximum
input level ±60 V with respect
to PTT reference. Input will
draw no more than 6 mA, and
requires at least 1 mA to
operate.
PTT Ref can be set to +14 V,
0 V or -14 V. PTT. Maximum
input level ±60 V with respect
to PTT reference. Input will
draw no more than 6 mA, and
requires at least 1 mA to
operate.
When the input PTT signal and
the PTT reference differ by
more than 10 V the radio keys.
When the input PTT signal and
the PTT reference differ by
more than 10 V the radio
dekeys.
When the input PTT signal and
the PTT reference are within
1 V, the radio dekeys.
Other conditions are
indeterminable.
T6T VHF 100 W Transmitter
Page 23
When the input PTT signal and
the PTT reference are within
1 V, the radio keys.
Other conditions are
indeterminable.
Operation
Back to Transmitter
Main Page
Mode 2 and Mode 3 Polarity Settings
R e a d y
O u t
S T D Each of the three polarity settings applicable to
E -
B I
S T D Mode 2 and Mode 3 can be set to the default STD
E x
V S W R
E x
S T D
> >
(standard) setting or INV (inverted).
The signal connections are detailed in Table 7
along with the conditions when STD or INV is
selected.
B a c k
E x i
< <
Table 7 Mode 2 and Mode 3 Polarity Settings
Signal
Connector
Polarity set to STD
Polarity set to INV
Ready Out
Facilities, pin 13
An open collector grounded
output when the radio is ready
to transmit and no BIT faults
are detected.
An open collector high
impedance output when the radio
is ready to transmit and no BIT
faults are detected.
E-BIT In
Facilities, pin 2
TTL input. 0 V indicates an
external fault.
TTL input. 5 V indicates an
external fault.
External VSWR
Input
Facilities, pin 4
TTL input. 0 V active.
TTL input. 5 V active.
T6T VHF 100 W Transmitter
Page 24
Operation
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Main Page
AM-Voice and AM-MSK BIT Screen
The AM-Voice and AM-MSK BIT screen is accessed from the Control screen.
B I
E T I
A C
E x
D C
a t
0 0 0 0 0 :
S u p p l
O N
2 8 V
L o c k
P A
T e m p
P A
C o o l
E x i
R F
D r
P A
O u t
P A
L o o p
E x i
Shows elapsed time 0:00 to 99999:59 (Hrs:Min).
Shows state of ac supply (On or Off).
n g
P A S S
Pass, Fail or Not Tested.
> >
P A S S
Pass, Fail or Not Tested.
p u t
P A S S
Pass, Fail or Not Tested.
P A S S
Pass, Fail or Not Tested.
e r
E r
D S P 1
T6T VHF 100 W Transmitter
o r
> >
P A S S
Pass, Fail or Not Tested.
P A S S
Pass, Fail or Not Tested.
P A S S
Pass, Fail or Not Tested.
< <
PA temperature -20°C to +150°C.
v e
V S W R
L o o p
Pass or Fail (Out-of-Lock).
Pass or Fail.
< <
F i
dc supply 0 to 40 V, <21.6 V Alert, <19 V Alarm.
P A S S
< <
Shows state of dc supply (On or Off).
> >
5 0 d e g C
D e p t
A u d i
P A S S
< <
B a s e b a n d
M o d
O N
E x i
E x i
0 0 h r
> >
S u p p l
S y n t
E x i
Select to initiate BIT test.
S u p p l
R F
> >
P A S S
Pass or Fail.
P A S S
Pass, Fail or Not Tested.
P A S S
Pass or Fail.
< <
> >
Page 25
Operation
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Main Page
D S P 2
P A S S
Pass or Fail.
X i
n x 1
P A S S
Pass or Fail.
X i
n x 2
P A S S
Pass or Fail.
E x
< <
E E P R O M
S t
a r
C a l
E x i
U p
b r
a t
B I
P w r
M A R C
E x i
o n
P A S S
Pass or Fail.
P A S S
Pass or Fail.
P A S S
Pass or Fail.
< <
U n k e y e d
E -
> >
> >
P A S S
Pass or Fail.
P A S S
Pass or Fail.
A C T I
V E
< <
> >
Active or Inactive.
H D L C
N A C T I
V E
Active or Inactive.
T 1 /
N A C T I
V E
Active or Inactive.
E 1
B a c k
E x i
T6T VHF 100 W Transmitter
< <
Page 26
Operation
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Main Page
Mode 2 and Mode 3 BIT Screen
The Mode 2 and Mode 3 BIT screen is accessed from the Control screen.
E T I
0 0 0 0 0 :
0 0 h r
Shows elapsed time 0:00 to 99999:59 (Hrs:Min).
A C
S u p p
O N
Shows state of ac supply (On or Off).
D C
S u p p
O N
Shows state of dc supply (On or Off).
E x
> >
S u p p l
S y n t
2 8 V
L o c k
P A
T e m p
E x i
P A
C o o l
P A S S
5 0 d e g C
< <
n g
V S W R
L o o p
E x
E r
o r
Shows value of dc supply.
Synth lock (Pass or Fail).
Indicates the PA temperature.
> >
P A S S
Pass or Fail.
P A S S
Pass, Fail or Not Tested.
P A S S
Pass or Fail.
< <
> >
D S P 1
P A S S
Pass or Fail.
D S P 2
P A S S
Pass or Fail.
P A S S
Pass or Fail.
X i
E x i
X i
n x 1
< <
n x 2
E E P R O M
S t
a r
E x i
C a l
E -
B I
U p
a t
M A R C
E x i
P A S S
Pass or Fail.
P A S S
Pass or Fail.
P A S S
Pass or Fail.
< <
b r
o n
> >
> >
P A S S
Pass or Fail.
P A S S
Pass or Fail.
A C T I
V E
< <
> >
Active or Inactive.
H D L C
N A C T I
V E
Active or Inactive.
T 1 /
N A C T I
V E
Active or Inactive.
E 1
B a c k
E x i
T6T VHF 100 W Transmitter
< <
Page 27
Operation
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Main Page
Software Configuration Screens
Software configuration screens are as follows:
T 6
V H F
1 1 8 H i
g h
E x
1 0 0 W
1 3 6 .
S t
T X
a b i
S o f
w a r
x x x x x x x x /
E x i
B a s e
S o f
w a r
x x x x x x x x /
E x i
M o d e
S o f
w a r
x x x x x x x x /
E x i
F i
D e s c r
F i
6 5 -
p t
S o f
T6T VHF 100 W Transmitter
p t
65-xxxxxxxx represents the software part
number and /v v represents its version.
v v
> >
Current
mode
running.
65-xxxxxxxx
represents the software part number and /v v
represents its version.
v v
> >
w a r
65-xxxxxxxx represents the software part
number and /v v represents its version.
v v
o n ]
< <
> >
w a r
x x x x x x x x /
D e s c r
E x i
S o f
> >
< <
x x x x x x x x /
E x i
65-xxxxxxxx represents the software part
number and /v v represents its version.
v v
< <
6 5 -
< <
6 5 -
6 5 -
> >
6 5 -
B o o t
The first screen defines the radio.
9 7 5 M H z
v v
65-xxxxxxxx represents the software part
number and /v v represents its version.
o n ]
< <
> >
Page 28
Operation
Back to Transmitter
Main Page
F i
6 5 [
6 5 -
S o f
w a r
x x x x x x x x /
D e s c r
F i
p t
S o f
p t
T6T VHF 100 W Transmitter
65-xxxxxxxx represents the software part number
and /v v represents its version.
v v
o n ]
w a r
x x x x x x x x /
D e s c r
v v
o n ]
65-xxxxxxxx represents the software part number
and /v v represents its version.
Page 29
Operation
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Main Page
Band Edges
The frequency range of the T6 100 W transmitter is 118 to 136.975 MHz. If required, transmission can
be limited to either one or two smaller parts of the frequency band by setting the band edges, BE1 to
BE4. Transmission is possible between BE1 and BE2 frequencies, and between BE3 and BE4
frequencies.
B E 1
1 1 8 .
0 0 0 M H z
B E 2
1 3 6 .
9 7 5 M H z
B E 3
1 1 8 .
0 0 0 M H z
E x i
B E 4
E x i
> >
1 3 6 .
9 7 5 M H z
The Band Edge screen is accessed from the
Control screen.
Band edge frequencies can be set only in
increments of 25 kHz.
If the transmitter is required to operate over the
full range, the band edge parameters must be set
to the lowest and highest values in the range (see
Table 8).
< <
Table 8 Band Edge Settings
BE1
BE2
BE3
BE4
B63100HS/NB set so that the full frequency range can be
transmitted.
118.000
136.975
118.000
136.975
Example: Transmitter set to transmit only those frequencies
in the range 120 to 130 MHz.
120.000
130.000
120.000
130.000
Example: Transmitter set to transmit only those frequencies
in the ranges 120 to 125 MHz and 130 to 135 MHz.
120.000
125.000
130.000
135.000
T6T VHF 100 W Transmitter
Page 30
Operation
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Main Page
BIT Status Warning Screens
The following shows some example BIT screens. These screens alternate with the Main screen when an
alert or alarm condition is present. Only the parameters causing the alert or alarm are displayed, and if
both an alert and alarm condition exists simultaneously only the alarm information is displayed. If multiple
parameters are signalling an alert or alarm condition, multiple screens are used to display the status
alternating with the Main screen.
A L E R T
S u p p
Alert:
2 1 V
A L E R T
R F
P o w e r
L o o p
E r
S u p p l
Alert:
R e d u c e d
The RF output power is reduced between 1 and
3 dB. The Alarm indicator is flashing.
o r
2 1 V
A L E R T
R F
P o w e r
P A
T e m p
Alert:
R e d u c e d
8 5 d e g C
A L A R M
R F
P o w e r
Alarm:
F A I
A L A R M
P o w e r
L o o p
E r
S u p p l
R e m o v e d
o r
F A I
P o w e r
P A
T e m p
T6T VHF 100 W Transmitter
The RF output power reduced by more than 3
dB. The Alarm indicator is lit.
Alarm:
The RF output power is shut down. The Alarm
indicator is lit.
1 8 V
A L A R M
R F
The RF output power is reduced between 1 and
3 dB. The Alarm indicator flashing
R e d u c e d
V S W R
R F
There is no RF power reduction. The Alarm
indicator is flashing.
Alarm:
R e m o v e d
9 5 d e g C
Page 31
The RF output power is shut down. The Alarm
indicator is lit.
Operation
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Main Page
Table 9 Functions and Parameters
Function
Front
Panel
VFP
MARC
T6
Controller
T1/E1
HDLC
Default Setting
118.000 MHz
AM-Voice
FREQUENCY
Change frequency
FREQUENCY CHANNELS
Store/Recall preset
frequency channels
SETTINGS
Set modulation
mode
Radio Settings (AM Modes)
Set RF output
power
100 W
Set audio input line
level
-13 dBm
Set inhibit on or off
Off
PTT test facility
on (key), off (dekey)
View
state
Off
Set Tx time out
180 s
Set modulation
depth
85%
Set mute on or off
(AM-Voice only)
On
Set VOGAD on
or off
(AM-Voice only)
On
Set antenna C/O
delay on or off
Set frequency offset
(AM-Voice only)
0 (No offset)
Set frequency step
size
(AM-Voice only)
25 kHz
AM-Voice - On
AM-MSK - Off
Continued >>
T6T VHF 100 W Transmitter
Page 32
Operation
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Table 9 Functions and Parameters (Continued)
Function
Front
Panel
VFP
MARC
T6
Controller
T1/E1
HDLC
Default Setting
Set microphone
type
(active or passive)
(AM-Voice only)
Passive
Set keying priority
(local or remote)
Local-Remote
Enable or disable
local PTT
Enabled
Enable or disable
remote PTT
Enabled
Enable or disable
remote phantom
PTT
Enabled
Radio Settings (Digital Modes)
MAC TM1 (inter
access delay)
MAC TM2 (channel
busy)
MAC p
(persistance)
MAC M1 (maximum
number of access
attempts)
On
View
state
STD
Set PTT input
polarity
(AM modes only)
View
state
STD
Set phantom PTT
input polarity
(AM modes only)
View
state
STD
Scramble vector
Tx enable
2.5 ms
60 s
13/256
135
4D4B
19787
Polarities
Ready out
Continued >>
T6T VHF 100 W Transmitter
Page 33
Operation
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Main Page
Table 9 Functions and Parameters (Continued)
Function
Front
Panel
VFP
MARC
T6
Controller
T1/E1
HDLC
Default Setting
Set PTT reference
voltage
(AM modes only)
View
state
+14 V
Set PTT output
polarity
(AM modes only)
View
state
STD
Set fast PTT
antenna changeover output polarity
(AM modes only)
View
state
STD
Set antenna
change-over output
polarity
(AM modes only)
View
state
STD
Set external VSWR
input polarity
(All modes)
View
state
STD
Set inhibit input
polarity
(AM modes only)
View
state
STD
BIT interruptive test
input polarity
(AM modes only)
View
state
STD (active low)
View
state
STD (active low)
118.000 and 136.975 MHz
30 s
E-bit input polarity
(All modes)
Band Edges
Set band edges
Reference Frequency
Adjust transmitter’s
reference frequency
LCD Backlight
Adjust LCD
backlight
Continued >>
BIT
T6T VHF 100 W Transmitter
Page 34
Operation
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Main Page
Table 9 Functions and Parameters (Continued)
Function
Front
Panel
VFP
MARC
T6
Controller
T1/E1
HDLC
Default Setting
Not in Standby
Front panel lock
Off
MARC lock
Off
T1/E1 lock
Off
HDLC lock
Off
Initiate BIT
interruptive test
STANDBY
Enter and exit
standby facility
SOFTWARE CONFIGURATION
View the
transmitter’s
software
configuration
LOCK FACILITIES
T6T VHF 100 W Transmitter
Page 35
Operation
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Intentionally Blank
Back to Transmitter
Main Page
Installation
This topic gives the information required to install a T6T VHF 100 W Multimode Transmitter.
Back to Transmitter
Main Page
Warnings and Cautions
WARNING
Dangerous Voltages
The instructions given in this topic involve connecting dangerous voltages to the transmitter
and should be carried out only by suitably qualified personnel.
WARNING
Dangerous Voltages
The equipment is permanently connected to the mains supply when the mains connector is
attached. Switching the rear panel Power switch to off does not isolate all internal circuits
from the mains supply. For this reason, a mains isolating switch should be fitted close to,
and easily accessible from, the transmitter's position. The isolation switch should isolate
both live and neutral supplies, be clearly labelled, and adequately rated to protect the
equipment.
WARNING
Antenna Radiation
The antenna used with the transmitter must be installed such that the resultant radiated field
strength is below 10 W/m² in areas normally accessible to personnel.
Caution
ESSDs
The T6T transmitter's circuitry contains Electrostatic Sensitive Devices (ESSDs). Personnel
must be aware of the precautions necessary to prevent damage to such devices. During
installation all precautions necessary to prevent ESSD damage must be taken.
Caution
Unauthorized Modifications
Changes or modifications made to this equipment that are not expressly approved by
Park Air, or parties authorized by Park Air, could void the user’s authority to operate the
equipment.
T6T VHF 100 W Transmitter
Page 2
Installation
Back to Transmitter
Main Page
Introduction
The procedures necessary to install a transmitter are listed in Table 1.
Table 1 Installation Procedures
Procedure
Reference
Read and understand the warnings and cautions given on page 2.
Perform an initial inspection of the transmitter and fit the correct ac input fuse.
page 9
Fit the transmitter into an equipment cabinet.
page 9
Make external signal connections. See Fig 1 to Fig 5 to determine which
external connections are required for the particular configuration.
page 10
Connect the chassis stud to the cabinet or system earth.
page 22
Connect the antenna.
page 22
Connect the dc input supply (if required).
page 22
Connect the ac input supply (if required).
page 23
Fuses and Connectors
The following list details the radio’s supply fuses and connectors. Some of the connectors (depending on
your particular configuration) are required during installation.
Table 2 Fuses and Connectors
Component
Type
Park Air Part Number
Fuses:
AC input fuses, F3, F4 for 110/120 V input
AC input fuses, F3, F4 for 220/230 V input
T4A, 125V, UL
T4A, 250V, IEC
29C11120102S
29E01120108S
DC input fuses, F1, F2
15A size 0
29-01350201
AC supply connectors
IEC
20-02030102
DC supply connectors
XLR 3-pin
20-01030106
Antenna connector
N-type plug
19-01030301
MARC connector
9-way D-type plug
Plug: 20-01090100
Cover: 20-09090101
MARC audio
RJ48 plug
20K01080100
MARC data
RJ48 plug
20K01080100
Facilities connector
15-way D-type plug
Plug: 20-01150100
Cover: 20-09150101
HDLC connector
RJ48 plug
20K01080100
T1/E1 connector
RJ48 plug
20K01080100
Reference connector
SMB connector
19C01050300
Microphone/Diagnostics connector
7-pin DIN plug
20-01070101
Connectors:
T6T VHF 100 W Transmitter
Page 3
Installation
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Main Page
Configuration
Connection of external equipment depends on the configuration required. Possible configurations are:
❑
T6T transmitter configured for local operation (see Fig 1).
❑
T6T transmitter configured for remote operation (see Fig 2).
❑
T6T transmitter configured for use with MARC (see Fig 3).
❑
T6T Mode 2 configuration (see Fig 4).
❑
T6T Mode 3 configuration. (see Fig 5).
T6T Transmitter
Optional Facilities that
can be used if required
E-BIT input
PTT relay output
External VSWR input
dc supply output
Inhibit input
BIT interruptive test input
Antenna change-over output
Ready output
Tape output
Facilities
Connector
Antenna
Connector
Reference
Connector
Microphone/Diagnostics
Connector
Mic/Headset for
local operation
Frequency Counter
required only for
maintenance
Laptop (or PC) required
only for maintenance
For local operation, the transmitter is operated from the front panel using a microphone/headset.
Any of the optional facilities may be connected.
Fig 1 T6T Transmitter Configured for Local Operation
T6T VHF 100 W Transmitter
Page 4
Installation
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Main Page
T6T Transmitter
Audio
PTT
MARC Connector
or,
MARC Audio Connector
Antenna
Connector
Optional Facilities that
can be used if required
E-BIT input
PTT relay output
External VSWR input
dc supply output
Inhibit input
BIT interruptive test input
Antenna change-over output
Ready output
Tape output
Facilities
Connector
Reference
Connector
Microphone/Diagnostics
Connector
Frequency Counter
required only for
maintenance
Mic/Headset for
engineering use
Laptop (or PC) required
only for maintenance
For remote operation, Audio and PTT signals from the control equipment terminate on the MARC
connector, or alternatively on the MARC Audio connector. If data is required by a compatible data system,
the RS422 data lines terminate on the MARC connector, or alternatively on the MARC Data connector.
Any of the optional facilities may be connected.
Fig 2 T6T Transmitter Configured for Remote Operation
T6T VHF 100 W Transmitter
Page 5
Installation
Back to Transmitter
Main Page
RSE2
T6T Transmitter
Audio
Equipment
Connector
PTT
dc supply output
MARC
Connector
RS422 data
Antenna
Connector
Optional Facilities that
can be used if required
E-BIT input
PTT relay output
External VSWR input
Unregulated supply output
Inhibit input
BIT interruptive test input
Antenna change-over output
Ready output
Tape output
Facilities
Connector
Reference
Connector
Microphone/Diagnostics
Connector
Mic/Headset for
engineering use
Frequency Counter
required only for
maintenance
Laptop (or PC) required
only for maintenance
When using a T6T transmitter with a MARC Remote Site Equipment (RSE2) the transmitter MARC
connector is pin-to-pin wired to one of the RSE2 Equipment connectors.
Any of the optional facilities may be connected.
Fig 3 T6T Transmitter Configured for use with MARC
T6T VHF 100 W Transmitter
Page 6
Installation
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T6T Transmitter
Reference
Connector
Antenna
Connector
Microphone/Diagnostics
Connector
HDLC
Connector
Mode 2
Network Computer
Control and data
T6R Receiver
T1/E1
Connector
Control and
data. 2 km
maximum
distance
Facilities
Connector
Antenna c/o control
Fast Antenna
Change-Over
Switch
T1/E1
Connector
Reference
Connector
Antenna
Connector
Headset/Diagnostics
Connector
Connects to the
Reference connector
Connects to the
Microphone/Diagnostics
connector
Frequency Counter
required only for
maintenance
Laptop (or PC) required
only for maintenance
Fig 4 T6T Transmitter Mode 2 Configuration
T6T VHF 100 W Transmitter
Page 7
Installation
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Main Page
T6T Transmitter
Antenna
Connector
T1/E1
Connector
Mode 3
Network Computer
Reference
Connector
Microphone/Diagnostics
Connector
Control and data
Frequency Counter
required only for
maintenance
Laptop (or PC) required
only for maintenance
Fig 5 T6T Transmitter Mode 3 Configuration
T6T VHF 100 W Transmitter
Page 8
Installation
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Main Page
Installation Procedures
Initial Inspection of the Transmitter
On receipt of the transmitter, remove all transit packaging and check that there is no damage. If damage
is evident, contact Park Air immediately and retain the original transit packaging. One copy of the T6 User
Documentation CD (part number 31-36T62VCD) is normally supplied with the transmitter. This CD
includes the VFP software.
Fitting the Correct AC Input Fuses
The mains input fuses, F3 and F4, are an integral part of the rear panel ac connectors. The fuse type
must be correct for the local mains supply as detailed below.
Earth
Line
For a mains input in the range 110 to 120 Vac, fuses
F3 and F4 should be rated T4A, 125V, UL.
Neutral
For a mains input in the range 220 to 230 Vac, fuses
F3 and F4 should be rated T4A, 250V, IEC.
F3
and F4
FS2
Holder for spare
fuse (not supplied)
Spare Fuse
Fitting a Radio into an Equipment Cabinet
Caution
Mechanical Support
It is essential that the chosen mechanical installation provides adequate support along the
depth (front to rear) of the unit. The transmitter must not be supported by the front panel;
doing so can cause damage.
The transmitter can be installed on telescopic slides, or on fixed runners, within a standard 483 mm
(19 inch) equipment cabinet. M4 tapped holes, each 10 mm deep (see Fig 6) are provided on each side
of the equipment to accept the slides. Details of suitable telescopic slides and fixed runners are available
from Park Air.
When fitted in the cabinet, the transmitter's front panel must be secured to the cabinet’s chassis using
four M6 x 16 mm screws and plastic washers.
T6T VHF 100 W Transmitter
Page 9
Installation
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Main Page
Item
Description
Transmitter
Inner Slide
M4 Wavy Washer
M4 x 8 mm Half Head Bolt
Fig 6 Slide Fittings
Make External Signal Connections
Making the external signal connections involves configuring the transmitter to suit its operational mode.
Illustrations showing various configurations are shown in Fig 1 to Fig 5; these figures should be used only
as a guide.
Front Panel Connectors
The front panel has two connectors; Microphone/Diagnostics and Reference connectors. These are
illustrated in Fig 7.
Fig 7 Front Panel
T6T VHF 100 W Transmitter
Page 10
Installation
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Main Page
Microphone/Diagnostics Connector
The Microphone/Diagnostics connector is a self-locking 7-way DIN socket used for connecting a
microphone, microphone/headset or PC. The connector pin-out is detailed in Table 3.
Pin-out of the Microphone/Diagnostics connector looking into
the mating face of the chassis mounted socket.
A suitable free socket is detailed in Table 2 on page 3.
Table 3 Microphone/Diagnostics Connector
Pin Number
Signal
Characteristic
Usage
Microphone ground
0 V.
Microphone/Headset
Transmit data
RS232. 115200 baud, 8 data bits, 1 stop bit,
no parity, no handshaking.
PC
Microphone PTT
0 V to PTT.
Microphone/Headset
Receive data
RS232. 115200 baud, 8 data bits, 1 stop bit,
no parity, no handshaking.
PC
Sidetone
–
Microphone/Headset
Microphone input
To ensure correct VOGAD operation, the
following microphone input levels are
required:
Passive setting: between 2 and 35 mV
Active setting: between 8 and 140 mV.
Microphone/Headset
Ground
0 V.
PC
Reference Connector
The Reference connector is an SMB plug used to monitor the radio’s reference frequency. It monitors
the frequency at a level of 100 mV (±50 mV) with less than -10 dBc harmonics.
T6T VHF 100 W Transmitter
Page 11
Installation
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Main Page
Rear Panel Connectors
The rear panel connectors are shown in Fig 8 and listed in Table 4. Select which connectors are going
to be used and then make connections as required.
Table 4 Rear Panel Connector Usage
Connector
Type
Usage
AC supply
2 x IEC
Terminating the ac input supply.
DC supply
2 x XLR 3-pin
Terminating the dc input supply.
Antenna
N-type
Terminating the antenna feeder coaxial cable.
External speaker
3.5 mm stereo jack
Connects an external loudspeaker for monitoring sidetone.
MARC
9-way D-type
Used to connect to a MARC remote site equipment.
Used to connect a T6 controller or hub.
Used to terminate remote audio and PTT signals when a
remote site equipment or T6 controller is not used.
MARC audio
RJ48
Used as an alternative to the MARC connector for terminating
remote audio and PTT signals.
MARC data
RJ48
Used as an alternative to the MARC connector for terminating
data signals to and from a compatible data system.
Facilities
15-way D-type
Provides a number of optional facilities that can be used as
required.
T1/E1
RJ48
Used for connecting the radio to a Mode 3 network computer,
connecting a transmitter and receiver together as a Mode 2
base station, or for connecting to a digital voice and data
network.
HLDC
RJ48
Used to connect to a Mode 2 network computer.
DANGER HIGH
RF VOLTAGES
CONNECT
BEFORE
USE
SUPPLY
T1 / E1
HDLC
MARC
DATA
MARC
AUDIO
MARC
FACILITIES
FUSE F3
~ AC SUPPLIES
FUSE F4
DC SUPPLIES
AC SUPPLY
48-62Hz
ANTENNA
DANGER HIGH
RF VOLTAGES
CONNECT
ANTENNA
BEFORE
USE
RATINGS
FUSE F3 / F4
110-240V T4A 250V IEC
POWER 800VA max
110-120V T4A 125V UL
DC SUPPLY
FUSE F1 / F2
21.6-32V 28 A
DANGER HIGH
RF VOLTAGES
CONNECT
BEFORE
USE
F15A 32V
SEE INSTALLATION INSTRUCTIONS BEFORE
CONNECTING SUPPLIES
DISCONNECT SUPPLIES WHEN NOT IN USE
FUSE F1
FUSE F2
Fig 8 Rear Panel (Connectors)
T6T VHF 100 W Transmitter
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Installation
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MARC Connector
The MARC connector is a 9-way D-type socket used to connect the transmitter to a MARC remote site
equipment, or it can also be used for normal remote operation.
As an alternative to using this connector, the RJ48 style MARC Audio and MARC Data connectors can
be used to provide the same functions.
The MARC connector pin-out is shown below and detailed in Table 5.
Pin-out of MARC connector looking into the mating face of the
chassis mounted socket.
A suitable free socket is detailed in Table 2 on page 3.
Table 5 MARC Connector
Pin Number
Signal
Characteristic
Ground
0 V.
Audio line in (+)
Balanced 600 ohm, -20 to +20 dBm.
Audio line in (-)
Phantom keying can be superimposed on the audio
lines. See Fig 10.
PTT input
Remote PTT signal input. See Fig 9.
Output supply
This output is between 21.6 and 32 Vdc (nominally
28 V) fused at 500 mA.
Data in (+)
RS422 differential asynchronous data at 9600 baud,
8 data bits, 1 stop bit, no parity, no handshaking.
Data in (-)
Data out (+)
Data out (-)
RS422 differential asynchronous data at 9600 baud,
8 data bits, 1 stop bit, no parity, no handshaking.
Note ...
The line level figures shown for the MARC connector are the limits when testing the transmitter using
a sine wave; the line level will be 10 dB above the line level setting. See the information supplied
under the heading ‘Line Level Setting’ in Operation.
T6T VHF 100 W Transmitter
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Installation
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MARC Audio Connector
The MARC Audio connector is an 8-way RJ48 socket. It can be used as an alternative to the MARC
connector for audio and PTT connections. The connector pin-out is shown below and detailed in Table 6.
Numbering is shown looking from the top of the connector.
The top is being viewed when the lever is on the bottom.
RJ48 Plug
Pin 1
Table 6 MARC Audio Connector
Pin Number
Signal
Characteristic
Audio line in (-)
Balanced 600 ohm, -20 to +20 dBm.
Audio line in (+)
Phantom keying can be superimposed on the audio
lines. See Fig 10.
Fast antenna
change-over/PTT
(output)
Open collector NPN transistor grounding output,
200 mA max, configurable n/o or n/c.
Not used
Not used
PTT (input)
Remote PTT signal input. See Fig 9.
Ground
0 V.
Not used
Note ...
The line level figures shown for the MARC Audio connector are the limits when testing the
transmitter using a sine wave; the line level will be 10 dB above the line level setting. See the
information supplied under the heading ‘Line Level Setting’ in Operation.
T6T VHF 100 W Transmitter
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Installation
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MARC or
MARC Audio
Connector
T6T Transmitter
MARC Audio Connector
Audio is pins 1 and 2.
PTT is pin 6
Ground is pin 7.
Control
Equipment
Cross-Site Lines
MARC Connector
Audio is pins 2 and 3.
PTT is pin 4
Ground is pin 1.
Audio line 1
Audio
Circuit
Audio line 2
Reference Voltage
(0 V, +14 V or -14 V)
Set from front panel
PTT
PTT input requires at least 1 mA to operate.
Input will draw no more than 6 mA.
PTT
Switch
VPTT
The transmitter reference voltage (0 V, +14 V or -14 V) is selected from the Polarities screen:
❑
PTT is active when VPTT differs from the transmitter reference voltage by more than ±10 V.
❑
PTT is inactive when VPTT differs from the transmitter reference voltage by less than ±1 V.
❑
Maximum value of VPTT is ±60 V with respect to transmitter reference voltage.
Example:
To use 0 V as the keying potential, VPTT = 0 V; set transmitter reference voltage to +14 V; set PTT In to STD.
Fig 9 Remote Keying
MARC or
MARC Audio
Connector
Control
Equipment
T6T Transmitter
MARC Audio Connector
Audio is pins 1 and 2
MARC Connector
Audio is pins 2 and 3
Audio
Circuit
Audio lines with phantom keying
signal superimposed
Reference Voltage
(0 V, +14 V or -14 V)
Set from front panel
PTT
Switch
PTT input requires at least 1 mA to operate.
Input will draw no more than 6 mA.
VPTT
To reduce the number of cross-site lines between the control site and the transmitter, phantom keying may be employed.
This method has the keying potential (VPTT) superimposed on the audio lines instead of using a separate line.
The transmitter reference voltage (0 V, +14 V or -14 V) is selected from the Polarities screen:
❑
PTT is active when VPTT differs from the transmitter reference voltage by more than ±10 V.
❑
PTT is inactive when VPTT differs from the transmitter reference voltage by less than ±1 V.
❑
Maximum value of VPTT is ±60 V with respect to transmitter reference voltage.
Example:
To use 0 V as the keying potential, VPTT = 0 V; set transmitter reference voltage to +14 V; set PTT In to STD.
Fig 10 Phantom Keying
T6T VHF 100 W Transmitter
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Installation
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MARC Data Connector
The MARC Data connector is an 8-way RJ48 socket. It can be used as an alternative to the MARC
connector for data connections. The connector pin-out is shown below and detailed in Table 7.
Numbering is shown looking from the top of the connector.
The top is being viewed when the lever is on the bottom.
RJ48 Plug
Pin 1
Table 7 MARC RJ48 Data Connector
Pin Number
Signal
Characteristic
Data in (-)
RS422 differential asynchronous data, 9600 baud,
8 data bits, 1 stop bit, no parity, no handshaking.
Data in (+)
Not connected
Data out (+)
Data out (-)
RS422 differential asynchronous data, 9600 baud,
8 data bits, 1 stop bit, no parity, no handshaking.
Remote supply ON/OFF
0 V to switch off.
Note: Rear panel switch must be in the ON position
for this function to operate.
Ground
0 V.
Output supply
This output is between 21.6 and 32 Vdc (nominally
28 V) fused at 500 mA.
T6T VHF 100 W Transmitter
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Installation
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T1/E1 Connector
The T1/E1 connector is an 8-way RJ48 socket used for connecting to a Mode 3 network computer or
connecting a transmitter and receiver together when operating as a Mode 2 base station. The connector
pin-out is detailed in Table 8.
Numbering is shown looking from the top of the connector.
The top is being viewed when the lever is on the bottom.
RJ48 Plug
Pin 1
Table 8 T1/E1 Connector
Pin
Signal
RRing
Characteristic
T1 - Balanced 100 ohm (±10%), 1.544 Mbits per second (±50 ppm), AMI/B8ZS Coding.
E1 - Balanced 120 ohm (±10%), 2.048 Mbits per second (±50 ppm), AMI/HDB3 Coding.
Protected with 28 V differential and common mode clamp and 1.25 A fuse in each line.
RTip
Not connected
TRing
T1 - Balanced 100 ohm (±10%), 1.544 Mbits per second (±50 ppm), AMI/B8ZS Coding.
TTip
E1 - Balanced 120 ohm (±10%), 2.048 Mbits per second (±50 ppm), AMI/HDB3 Coding.
Protected with 28 V differential and common mode clamp and 1.25 A fuse in each line.
Not connected
Not connected
Not connected
T6T VHF 100 W Transmitter
Page 17
Installation
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HDLC Connector
The HDLC connector is an 8-way RJ48 socket used for connecting to a Mode 2 network computer. The
connector pin-out is detailed in Table 9.
Numbering is shown looking from the top of the connector.
The top is being viewed when the lever is on the bottom.
RJ48 Plug
Pin 1
Table 9 HDLC Connector
Pin
Signal
HDLC RX A
(input)
HDLC RX B
(input)
HDLC CL A
(output)
HDLC TX B
(output)
Characteristic
RS422 differential synchronous data, 128 kbytes per second
(±50 ppm).
RS422 differential synchronous data, 128 kbytes per second
(±50 ppm).
RS422 differential synchronous data, 128 kbytes per second
(±50 ppm).
HDLC TX A
(output)
HDLC CL B
(output)
Pair to pin 3.
Ground
0 V.
Output supply
This output is between 21.6 and 32 Vdc (nominally 28 V) fused at
500 mA.
T6T VHF 100 W Transmitter
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External Speaker
The External Speaker connector is a 3.5 mm stereo jack used for connecting an external speaker to the
transmitter to provide sidetone. This speaker should be a high impedance active type.
Table 10 External Speaker
Pin
Signal
Characteristic
Tip
Speaker drive (output)
0 to 3 V pk-pk. Connected directly to Ring.
Ring
Speaker drive (output)
0 to 3 V pk-pk. Connected directly to Tip.
Sleeve
Ground
0 V.
T6T VHF 100 W Transmitter
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Installation
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Facilities Connector
The Facilities connector is a 15-way D-type filtered socket used for connecting to associated parts of a
system. The connector pin-out is detailed in Table 11.
Pin-out of Facilities connector looking into the mating face of
the chassis mounted socket.
A suitable free socket is detailed in Table 2 on page 3.
15
Table 11 Facilities Connector
Pin Number
Signal
Characteristic
Ground
0 V.
E-BIT (input)
An external BIT input that connects from any ancillary equipment
having a compatible BIT alarm output.
When this input is active, the transmitter’s front panel Alarm indicator
flashes and an E-BIT message is displayed on the display. The input is
TTL having a 4.7 kohm pull-up resistor to 5 V. The input is
configurable from the front panel to be active high or low.
PTT output
Grounding solid state relay. +60 to -60 V, ac or dc, 100 mA max,
configurable n/o or n/c. Activated 35 ms (±1 ms) before the start of the
power ramp up to allow for the antenna relay pull-in time.
External VSWR input
Used to indicate an external VSWR fault. TTL input with 4.7 kohm pullup to 5 V. Configurable active high or low.
Antenna change-over
(output)
Solid state relay linked to pin 6. See Fig 11 for further detail.
Antenna change-over
common (output)
Solid state relay linked to pin 5.
Not used
Ground
0 V.
Output supply
This output is between 21.6 and 32 Vdc (nominally 28 V) fused at
500 mA.
10
Inhibit (input)
Active signal prevents the transmitter keying. TTL with 4.7 kohm pullup to 5 V. Configurable active high or low.
11
BIT interruptive test
(input)
Active signal initiates a BIT test. TTL with 4.7 kohm pull-up to 5 V.
Configurable active high or low. Must be asserted for >300 ms.
12
Not used
13
Ready (output)
An output that is active when the radio is ready to transmit and no
faults are detected. Open collector NPN transistor grounding output,
200 mA max, configurable n/o or n/c.
14
Tape (output)
An audio output for connection to a recording system. 0 dBm fixed
output into 600 ohm for 90% modulation depth.
15
Reserved (output)
Do not connect to pin 15 unless advised to do so by Park Air.
T6T VHF 100 W Transmitter
Page 20
Installation
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Main Page
T6T Transmitter
(Main)
Antenna
Facilities
Connector
Antenna
28 Vdc (nominal)
T6T Transmitter
(Standby)
Main/Standby
Transmit Relay
Facilities
Connector
Control
Solid State
Relay
Link
Antenna
Example
This example shows the Antenna Change-over Output configured to control the antenna switching between main
and standby transmitters. The potential on Facilities connector pin 6 is switched through to pin 5 when the standby
transmitter is keyed; in this example, pin 6 is linked to ground. This energizes the Main/Standby Transmit Relay to
route the standby transmitter to the antenna.
Other Configurations
The antenna change-over output can be configured in other ways to suit the user’s requirement subject to:
❑
Pin 6 can be any potential between -60 and +60 Vac, or dc.
❑
The maximum current drawn must not exceed 100 mA.
❑
The output at pin 5 is configurable normally open or normally closed from the Polarities screen.
❑
The internal solid state switch activates 35 ms before the start of the power ramp to allow for the antenna
relay pull-in time.
Fig 11 Example: Using the Antenna Change-over Output
T6T VHF 100 W Transmitter
Page 21
Installation
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Chassis Stud Connection
WARNING
Chassis Earth
A chassis stud is fitted to the transmitter's rear panel. This stud is used to connect the
equipment to the equipment cabinet, or to the user's system earth point. The stud must not
be used as the safety earth.
In order not to compromise the transmitter’s Electromagnetic Compatibility (EMC) the chassis stud,
marked
and fitted to the rear panel must be connected to the equipment cabinet (if a cabinet is being
used) or to the user's system earth point. The connection should be made using a single tri-rated, greenand-yellow cable having a cross-sectional area of 2.5 mm2. The cable should have CSA and UL1015
approval, and be connected to the chassis stud through an M6 eyelet (for example, Park Air part number
20-08010103).
Failure to comply with this instruction could result in non-compliance with the European
Commission EMC Directive 89/336/EEC.
Connect the Antenna
The antenna connector is an N-type socket suitable for connecting a 50 ohm antenna.
Connect the DC Input Supply
The transmitter operates from either an ac, or a dc input supply. When both ac and dc are connected,
operation from the ac supply takes priority; automatic change-over to the dc supply occurs if the ac
supply fails. On restoration of the ac supply, the equipment reverts to ac operation.
The dc input supply connectors (see Fig 12) are fitted to the transmitter rear panel. The recommended
minimum rating of the dc supply cables is: 2-core having a cross-sectional area of 1.5 mm2 per core. The
supply cables should be fitted with XLR 3-pin connectors (Park Air part number 20-01030106).
Positive
Negative
Pin-out of DC connector looking
into the mating face of the chassis
mounted socket.
Not used
Fig 12 DC Connectors
T6T VHF 100 W Transmitter
Page 22
Installation
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Connect the AC Input Supply
WARNING
Dangerous Voltages
The equipment is permanently connected to the mains supply when the mains connector is
attached. Switching the rear panel Power switch to off does not isolate all internal circuits
from the mains supply. For this reason, a mains isolating switch should be fitted close to,
and easily accessible from, the transmitter's position. The isolation switch should isolate
both live and neutral supplies, be clearly labelled, and adequately rated to protect the
equipment.
WARNING
Earth Connection
This equipment must be earthed. The earth terminal of the ac connector should be used as
the safety earth.
Two ac input connectors are fitted to the transmitter rear panel. The cables used to connect between the
equipment and the ac power source should be 3-core (to IEC 227) rated 250 Vac at 8 amps, and have a
minimum cross-sectional area of 1.0 mm2 per core. Park Air recommends the use of polyvinyl chloride
(PVC) insulated cable. The cable must be fitted with the IEC approved equipment connector and conform
to the following specification:
❑
If PVC insulated, be not lighter than ordinary polyvinyl chloride sheathed flexible cord according
to IEC publication 227 (designation H05 VV-F, or H05 VVH2-F).
❑
If rubber insulated, be of synthetic rubber and not lighter than ordinary tough rubber-sheathed
flexible cord according to IEC publication 245 titled ‘Rubber Insulated Cables of Rated Voltages
up to and Including 450/750 V (designation H05 RR-F)’.
The T6T 100 W transmitter is a Class 1 equipment. The ac supply cables should have a green-andyellow protective earthing conductor electrically connected to the protective earthing terminal of the
equipment connector and the mains plug. Park Air recommends the ac supply cable is colour coded in
accordance with the electrical appliance (colour code) regulations for the UK. That is:
❑
The core coloured green-and-yellow must be
connected to the terminal in the plug that is
marked with the letter E or by the earth symbol
or coloured green-and-yellow.
❑
The core coloured blue must be connected to
the terminal that is marked with the letter N or
coloured black.
❑
The core coloured brown must be connected to
the terminal that is marked with the letter L or
coloured red.
T6T VHF 100 W Transmitter
Page 23
Earth
Line
Neutral
F3 and F4
FS2
Spare Fuse
Installation
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Switching On
WARNING
Dangerous Voltages
When the Power switch is set to the Standby position, dangerous voltages are still present
in the transmitter's internal power supply circuitry. To ensure safe working, the transmitter
must be isolated from the ac and dc input supplies.
When installation is complete, the transmitter should be switched on at the rear panel 2-way rocker
Power switch. The Power switch is used to switch on, and switch off, power to the transmitter's circuitry
but does not remove power from the radio.
= On
= Standby
Under normal circumstances this screen is displayed for a few seconds when the radio is switched on.
T 6
D i
c )
2 0 0 3
n i
a l
s i
g i
a l
R a d i
P a r
A i
n g .
The bottom row begins empty and dots are added as the initialisation progresses. When the initialisation
is complete the Main Screen is displayed.
Setting Up
When installation has been successfully completed the transmitter must be set up using the front panel
controls or the VFP.
Setting up is detailed in the Operation section of this documentation.
When setting up the transmitter, pay particular attention to the Polarities of any
functions that have been hardwired during installation. For example, the polarity of
the PTT input and the polarity and configuration of the Antenna Change-over
output. Failure to select the correct settings will result in incorrect operation.
T6T VHF 100 W Transmitter
Page 24
Installation
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Maintenance
This topic gives scheduled maintenance procedures, details module replacement, and
describes how to use the Virtual Front Panel (VFP).
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Introduction
This section gives the scheduled and unscheduled maintenance procedures for the T6T 100 W
transmitter and shows how to use the Virtual Front Panel (VFP).
Scheduled Maintenance
A scheduled maintenance procedure is given on page 3. Park Air
recommends that this task be completed every twelve months.
Unscheduled Maintenance
Normally, the T6 transmitter is considered a Line Replaceable Unit
(LRU) and should be replaced with a serviceable spare if a fault
occurs. The faulty transmitter should then be returned to Park Air
for repair.
In certain circumstances, Park Air Customer Support may suggest
that the user change one of the transmitter modules. Dismantling
and assembly instructions are therefore given under the heading
Unscheduled Maintenance starting on page 7.
Using the VFP
Operating parameters can be set from the transmitter front panel,
or by using the VFP. Some additional functions are available from
the VFP. See page 22.
Configuration
T6 radios are configured in respect of hardware and software.
Hardware Configuration
The radio’s hardware configuration is identified by the
modification level. A modification label is fitted to the radio’s
rear panel showing the model of radio, the radio’s part number
and the radio’s serial number.
The modification (Mod) record shows the configuration status.
In the example shown, the radio is at Mod strike 8.
T6T100
B63100HS/NB
2K1234
Modification Label
Software Configuration
A white label fitted to the top
cover lists the radio’s software
configuration.
In this example there are three
fills: AM-Voice, Mode 2 and
Mode 3.
Software Configuration
2K1234
Part Order No.
B63100HS/NB
Software
Mode
Part No.
Fill 1
AM_VOICE
65-00000465
Fill 2
65-00000466
Fill 3
65-00000467
Fill 4
Software Configuration Label
Replacement Modules
To ensure compatibility when replacing a radio or a module, the configuration should be the same (see
the previous headings: Hardware and Software Configuration).
Spare modules received from Park Air are supplied with a Spares Instruction that details the
configuration of the module and any special instructions. If in any doubt regarding the suitability of spare
modules contact Park Air Customer Support.
T6T VHF 100 W Transmitter
Page 2
Maintenance
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Scheduled Maintenance
Park Air recommends that scheduled maintenance is carried out at twelve-monthly intervals. Scheduled
maintenance comprises the following checks:
Number
Check
Tools/Test Equipment Required
Ensure the equipment is clean and that external
connectors are securely fitted.
Camel hair brush/clean lint-free
cloths
Check and reset (if required) the transmitter’s
internal frequency reference.
VHF frequency counter
Perform a BIT interruptive test.
Perform an ac and dc change-over check (if both
supplies are connected).
Cleaning and Checking Security of Connectors
Remove all dust and dirt from the equipment exterior using a lint-free cloth and camel hair brush. Check
all external connections are secure and free from damage.
Setting the Transmitter Internal Reference Frequency
To set the transmitter internal reference frequency, use the following procedure. Note that references to
the switch in the procedure mean the Scroll/Select switch.
(1)
Ensure the transmitter does not have
an offset.
(2)
Connect a frequency counter to the
front panel Reference connector.
F r
(3)
From the Main screen, press the switch
to display the Control screen. Turn the
switch until Settings is highlighted.
Press the switch.
S e t
E x i
(4)
(5)
Ensure the Settings screen is
displayed. Turn the switch until Ref
Freq is highlighted, then press the
switch.
With Ref Freq selected turn the switch
clockwise or anti-clockwise until the
frequency
counter
reads
20.950000 MHz ±10 Hz, then press the
switch.
e q u e n c y
C h a n n e l
n g s
Control Screen
B a n d
R e f
E d g e s
F r
B a c k l
E x i
e q
g h t
5 0 .
0 %
0 3 0 s
< <
> >
Settings Screen
(6)
Turn the switch clockwise until Exit is highlighted, then press the switch. You are returned to the
Main screen.
(7)
Disconnect the frequency counter.
T6T VHF 100 W Transmitter
Page 3
Maintenance
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Main Page
(8)
If not using 5-carrier offset, refer to AM-Voice Mode Settings Screen in the Operation section of
this document and set to the required offset.
(9)
If 5-carrier offset is required, restore the carrier offset using the following routine:
❑
Connect a 50 ohm frequency counter, through a 60 dB attenuator, to the transmitter rear
panel Antenna connector (see Fig 5 for location of the Antenna connector)
❑
Refer to AM-Voice Mode Settings Screen in the Operation section of this document and set
the desired 5-carrier offset
❑
Refer to Changing the Transmitter Operating Frequency in the Operation section and set the
transmitter to the nearest 25 kHz channel frequency. For example, if the required frequency
is 124.504 (+4 kHz offset), set the transmitter to 124.500 MHz
❑
Key the transmitter and adjust the reference frequency, using the front panel Scroll/Select
switch, until the frequency counter displays the required operating frequency. For example
124.504 MHz
❑
When the frequency counter displays the exact operating frequency, press the Scroll/Select
switch and stop keying the transmitter
❑
Disconnect the test equipment and reconnect the antenna.
T6T VHF 100 W Transmitter
Page 4
Maintenance
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To Initiate a BIT Test
An interruptive BIT test cannot be initiated in Mode 2 or Mode 3.
During an interruptive BIT test, the transmitter radiates modulated carrier waves at the set power.
Users should therefore obtain the necessary authority before initiating a test.
If the test is to be carried out with the antenna disconnected, ensure a load is fitted to the
transmitter’s Antenna connector.
In order to test the line input stages, an internally generated 1 kHz tone is injected into the line input
circuit. Any other audio present on the line input will cause the test to be inaccurate. Therefore the
transmitter MUST NOT be keyed during the test.
(1)
(2)
From the Main screen, press the switch to
display the Control screen. Turn the switch
until BIT is highlighted. Press the switch.
Ensure the BIT menu is displayed. Turn
the switch until BIT Initiate is highlighted.
Press the switch.
B I
S /
S t
a n d b y
E x
B I
E x
(4)
During the test, which takes approximately
two seconds, the Testing screen is
displayed.
After the test, either a Pass or Fail screen
is displayed. Selecting OK takes the user
back to the BIT screen.
< <
n i
a t
0 0 0 0 0 :
S u p p
E T I
A C
(3)
C o n f
0 0 h r
O N
> >
T e s
P l
e a s e
T e s
S t
n g
W a
a t
u s
P A S S
O K
(5)
If fail is displayed, scroll through the screen
to check the cause of the failure.
T e s
S t
F A I
a t
u s
O K
T6T VHF 100 W Transmitter
Page 5
Maintenance
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AC and DC Change-over Check
If both ac and dc input supplies are connected to the transmitter, carry out the following check:
(1)
Confirm that both ac and dc supplies are connected to the transmitter. Ensure that the rear panel
Power switch is set to the I (on) position.
(2)
Confirm that the front panel Ready indicator is lit, the LCD is illuminated, and the transmitter is
operational.
(3)
Switch off the ac supply from its source.
(4)
Check that the transmitter continues to operate correctly from the dc supply. If accessed, the
front panel BIT screen will show AC Supply as off, and DC Supply as on. The value of the dc
supply is also shown.
T6T VHF 100 W Transmitter
Page 6
Maintenance
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Unscheduled Maintenance
WARNING
Dangerous Voltages
The instructions given in this section involve connecting dangerous voltages to the
transmitter. Maintenance should be carried out only by suitably qualified personnel.
When an ac supply is connected, dangerous voltages are present within the transmitter. Care
must be taken by personnel to avoid accidental contact with exposed circuitry during
maintenance or alignment procedures.
When the Power switch is set to the Standby position, dangerous voltages are still present
in the transmitter's internal power supply circuitry. To ensure safe working, the ac and dc
input supplies must be disconnected from the transmitter.
WARNING
Antenna Radiation
The antenna used with the transmitter must be installed such that the resultant radiated field
strength is below 10 W/m² in areas normally accessible to personnel.
Caution
ESSDs
The T6 transmitter circuitry contains Electrostatic Sensitive Devices (ESSDs). Personnel
must be aware of the precautions necessary to prevent damage to such devices.
Caution
Unauthorized Modifications
Changes or modifications made to this equipment that are not expressly approved by
Park Air, or parties authorized by Park Air, could void the user’s authority to operate the
equipment.
Caution
Repairs
When carrying out repairs to the PA module, care must be taken not to damage the gasket.
If the strips become damaged, they must be replaced. Failure to comply with this instruction
may compromise the transmitter Electromagnetic Compatibility (EMC) and breach European
Commission regulations.
When screws are inserted into the transmitter PA casting care must be taken not to exceed
a torque of 6 Ibs/inch when tightening. This applies when replacing the top and bottom
covers and during the refitting of the PA modules.
T6T VHF 100 W Transmitter
Page 7
Maintenance
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Introduction
This document provides the user with detailed instructions on the removal and replacement of modules
and assemblies. When removing or refitting modules, observe antistatic handling precautions. Do not
change any potentiometer (or link) settings unless detailed in these instructions. Potentiometers have
been set using specialist equipment.
Molex KK Connectors
The transmitter uses the following Molex KK connectors:
❑
CN2 on the PA Control module
❑
CN7 and CN6 on the PSU Regulator module.
To remove KK type connectors:
❑
Free the locking mechanism on the connector by moving one side of the connector up, then move
the other side up (see the following diagram). The upward motion should only be as far as needed
to free the locking mechanism
❑
DO NOT pull the cable to free the connector
❑
Note that KK type connectors are designed to be removed in this manner to free the locking
mechanism. Do not use this procedure with non-KK type connectors as damage to the connector
may occur.
Lift 1
Lift 2
PCB
Tools, Materials and Test Equipment Required
The following tools, materials and test equipment should be made available to complete the maintenance
tasks described in this section.
❑
Personal Computer (PC)
❑
Frequency Counter
❑
General Purpose Tool Kit (including
a 1.5 mm Allen key)
❑
Power Meter
❑
Dummy Load
❑
5 mm Nut Spinner
❑
❑
Camel Hair Brush
PC to Radio Interconnection Lead
(Park Air part number 17E12600001)
❑
Clean Lint-free Cloths
❑
SMB to BNC Lead for Reference Frequency
(Park Air part number 17K11000004)
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Maintenance
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Top and Bottom Covers
One of the top cover screws is covered with a warranty label that should not be tampered with unless
Park Air Customer Support has advised otherwise. When authorisation has been made the following
procedures should be followed.
To remove the top cover, locate and unscrew the 19 countersunk screws securing the top cover to the
mainframe. Access can then be gained to the Processor module and PSU Regulation module.
To remove the bottom cover, locate and unscrew the 15 countersunk screws securing the bottom cover
to the mainframe. Access can then be gained to the PA Control module.
The following modules require both top and bottom covers to be removed:
❑
Power Supply modules
❑
Combiner BIT module
❑
PA modules
❑
Front Panel assembly PCB.
Removing and Refitting the Processor Module
The Processor module is located as shown in Fig 5. A module removal diagram is shown in Fig 8.
WARNING
Dangerous Voltages
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove the Processor module, and if possible, save the radio settings. Connect a
PC with the VFP software loaded to the radio using the PC to Radio Interconnection Lead (Park Air part
number 17E12600001). With the VFP software active, upload the radio settings to a specified file.
Ensure that the transmitter is isolated from the ac and dc input supplies. Then proceed as follows:
(1)
Unscrew the 19 countersunk screws and remove the transmitter top cover.
(2)
Locate the Processor module and disconnect the following connectors (Fig 8):
❑
CN1 50-way connector (50-way ribbon cable from PA Control module CN1)
❑
CN3 14-way connector (14-way ribbon cable from PSU Regulator module CN4)
❑
CN4 34-way connector (34-way ribbon cable from Front Panel module CN1).
(3)
Gain access to the rear of the transmitter. Using a 5 mm nut spinner tool, remove the four
screwloc 8 mm-4-40 UNC stud spacers that secure the Processor module interface connectors
CN5 and CN6 to the rear panel.
(4)
Remove the seven M3 x 8 mm screws that secure the module to the transmitter mainframe.
(5)
Remove the module from the chassis.
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Maintenance
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Refitting
To refit the Processor module, proceed as follows:
(1)
Place the module in position. Ensure no wires are trapped by the module. Ensure jumper J2 on
the module is set to ‘T’ for transmitter (see Fig 1).
JP2
Shown set for
transmitter
TS7
T2
T3
IC38
C84
R/TR
IC19
IC20
IC21
R/TR
IC25
IC27
Fig 1 Processor Module JP2 Location
(2)
Ensure the module interface connectors CN5 and CN6 are located correctly and are aligned with
the screw holes in the rear panel. Fit the four screwloc 8 mm-4-40 UNC screws and wavy
washers but leave them loose.
(3)
Fit the seven M3 x 8 mm screws that secure the module to the transmitter mainframe, but leave
them loose.
(4)
Using a 5 mm nut spinner tool, tighten the four screwloc 8 mm-4-40 UNC screws and wavy
washers that secure the connectors; then tighten the seven M3 x 8 mm screws that secure the
module to the transmitter mainframe.
(5)
Refit the following connectors to the module:
❑
CN1 50-way connector (50-way ribbon cable from PA Control module CN1)
❑
CN3 14-way connector (14-way ribbon cable from PSU Regulator module CN4)
❑
CN4 34-way connector (34-way ribbon cable from Front Panel module CN1).
(6)
Re-establish the ac and/or dc supplies.
(7)
Switch power on at the radio using the rear mounted Power switch.
(8)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(9)
If a new module has been fitted, connect the VFP PC to the radio using the PC to Radio
Interconnection Lead, Park Air part number 17E12600001 (if not already connected). Note that
any module sent from Park Air as a spare for a particular radio will be programmed with
compatible operating and Fill software. Park Air keeps records of module software in all radios
supplied. Care must be taken when using a module removed from another radio as this module
may not have compatible software.
(10) Download the saved radio settings from file using the VFP. Alternatively the settings can be
edited by hand as described in the Operation section of this document. Once entered, ensure the
required settings appear in the VFP screen.
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(11) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure
To Calibrate the Transmitter on page 26.
(12) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.
(13) Set the transmitter internal reference frequency by carrying out the procedure detailed on
page 3.
(14) Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the
transmitter from the ac and/or dc supplies.
(15) Refit the transmitter top cover. The transmitter can now be returned to service.
Removing and Refitting the PSU Regulator Module
The PSU Regulation module is located as shown in Fig 5. A module removal diagram is shown in Fig 9.
WARNING
Dangerous Voltages
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove the PSU Regulation module, ensure that the transmitter is isolated from the
ac and dc input supplies. Then proceed as follows:
(1)
Unscrew the 19 countersunk screws and remove the transmitter top cover.
(2)
Locate the PSU Regulation module and remove the three M3 x 8 mm captive washer screws that
secure the module to the transmitter mainframe.
(3)
Carefully raise the module to gain access to the module connectors.
(4)
Disconnect the following connectors:
(5)
❑
CN5 10-way connector (10-way ribbon cable to PA Control module CN6)
❑
CN6 6-way connector (6-way loom to Combiner BIT module CN12)
❑
CN4 14-way connector (14-way ribbon cable to Processor module CN3)
❑
CN3 3-way connector (part of loom to Combiner BIT module CN7)
❑
CN7 3-way connector (3-wire loom to rear panel On/Off switch)
❑
CN2 2-way connector (part of loom to Combiner BIT module CN7)
❑
CN1 4-way connector (part of loom to Combiner BIT module CN7)
Remove the module from the chassis.
T6T VHF 100 W Transmitter
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Maintenance
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Refitting
To refit the PSU Regulator module, proceed as follows:
(1)
While holding the module in position, connect the following connectors:
❑
CN1 4-way connector (part of loom to Combiner BIT module CN7)
❑
CN2 2-way connector (part of loom to Combiner BIT module CN7)
❑
CN7 3-way connector (3-wire loom to rear panel On/Off switch)
❑
CN3 3-way connector (part of loom to Combiner BIT module CN7)
❑
CN4 14-way connector (14-way ribbon cable to Processor module CN3)
❑
CN6 6-way connector (6-way loom to Combiner BIT module CN12)
❑
CN5 10-way connector (10-way ribbon cable to PA Control module CN6).
(2)
Locate the module in position. Ensure no wires are trapped by the module.
(3)
Secure the module to the transmitter mainframe using the three M3 x 8 mm captive washer
screws removed during disassembly.
(4)
Re-establish the ac and/or dc supplies.
(5)
Switch power on at the radio using the rear mounted Power switch.
(6)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(7)
Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.
(8)
Set the rear panel Power switch to Standby. Isolate the transmitter from the ac and/or dc
supplies.
(9)
Refit the transmitter top cover. The transmitter can now be returned to service.
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Maintenance
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Removing and Refitting the PA Control Module
The PA Control module is located as shown in Fig 5. A module removal diagram is shown in Fig 10.
WARNING
Dangerous Voltages
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove the PA Control module, ensure that the transmitter is isolated from the ac
and dc input supplies. Then proceed as follows:
(1)
Unscrew the 15 countersunk screws and remove the transmitter bottom cover.
(2)
Locate the PA Control module and disconnect the following connectors:
❑
CN1 50-way connector (50-way ribbon cable from Processor module CN1)
❑
CN6 10-way connector (10-way ribbon cable from PSU Regulator module CN5)
❑
CN5 SMB connector (reference frequency from front panel)
❑
CN3 SMB connector (RF drive to Combiner BIT module CN16)
❑
CN4 SMB connector (forward power sense from Combiner BIT module CN27)
❑
CN2 6-way connector (6-wire loom to Combiner BIT module CN15).
(3)
Remove the eight M3 x 8 mm captive washer screws that secure the module to the mainframe.
(4)
Remove the module from the chassis.
Refitting
To refit the PA Control module, proceed as follows:
(1)
Place the module in position. Ensure no wires are trapped by the module.
(2)
Fit the eight M3 x 8 mm captive washer screws, previously removed, that secure the module to
the mainframe.
(3)
Refit the following connectors to the module:
❑
CN2 6-way connector (6-wire loom to Combiner BIT module CN15)
❑
CN4 SMB connector (forward power sense from Combiner BIT module CN27)
❑
CN3 SMB connector (RF drive to Combiner BIT module CN16)
❑
CN5 SMB connector (reference frequency from front panel)
❑
CN6 10-way connector (10-way ribbon cable from PSU Regulator module CN5)
❑
CN1 50-way connector (50-way ribbon cable from Processor module CN1).
(4)
Re-establish the ac and/or dc supplies.
(5)
Switch power on at the radio using the rear mounted Power switch.
(6)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(7)
Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure
To Calibrate the Transmitter on page 26.
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Maintenance
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(8)
Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.
(9)
Set the transmitter internal reference frequency by carrying out the procedure detailed on
page 3.
(10) Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the
transmitter from the ac and/or dc supplies.
(11) Refit the transmitter bottom cover. The transmitter can now be returned to service.
Removing and Refitting the Power Supply Modules
The Power Supply modules are located as shown in Fig 5. The removal diagram is shown in Fig 11.
WARNING
Dangerous Voltages
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove the Power Supply modules, ensure that the transmitter is isolated from the
ac and dc input supplies. Then proceed as follows:
(1)
Remove the transmitter top and bottom covers as described previously.
(2)
Support the radio on its side.
(3)
Locate the power supplies. From the bottom half of the unit remove the two No. 6 x 32 UNC
countersunk screws that secure each power supply to the transmitter mainframe. These screws
are accessed through clearance holes in the Combiner BIT module. During this operation
support the power supply from the top half of the unit.
(4)
Withdraw each power supply from the chassis sufficient to allow access to the power terminal
blocks taking care not to damage the ac terminal plastic supply guard.
(5)
Remove the CN4 connectors (PSU-1 and PSU-2 to the Combiner BIT module, CN10 and CN11
respectively).
(6)
Disconnect the dc wires from the power supply terminal block (PSU-1 and PSU-2 to the
Combiner BIT module, CN1 and CN3 respectively).
(7)
Slide back the terminal block cover and disconnect the ac wires from the three connector terminal
block (marked L N E).
(8)
Carefully remove each power supply from the transmitter.
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Maintenance
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Refitting
To refit the power supply modules:
(1)
With the transmitter on its side hold each power supply near to its securing position in the top half
of the radio.
(2)
Slide back the terminal block cover and connect the ac wires to the three connector terminal
block (marked L N E); brown to terminal L, blue to terminal N and yellow/green to terminal E.
(3)
Connect the dc wires to the eight connector terminal block, red to terminal 1 and terminal 2 and
black to terminal 5 and terminal 6.
(4)
Connect CN4.
(5)
Taking care not to damage the plastic supply guard, lower the power supply into position and
secure from the bottom half of the unit using two countersunk screws, previously removed, for
each power supply.
(6)
Re-establish the ac and/or dc supplies.
(7)
Switch power on at the radio using the rear mounted Power switch.
(8)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(9)
Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.
(10) Set the rear panel Power switch to Standby. Isolate the transmitter from the ac and/or dc
supplies.
(11) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.
T6T VHF 100 W Transmitter
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Removing and Refitting the Combiner BIT Module
The Combiner BIT module is located as shown in Fig 5. The removal diagram is shown in Fig 12.
WARNING
Dangerous Voltages
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove the Combiner BIT module, ensure that the transmitter is isolated from the
ac and dc input supplies. Then proceed as follows:
(1)
Remove the transmitter top and bottom covers.
(2)
Locate the Combiner BIT module and disconnect the following connectors:
❑
CN1 4-way connector
❑
CN2 3-way connector
❑
CN3 4-way connector
❑
CN4 3-way connector
❑
CN5 3-way connector
❑
CN6 3-way connector
❑
CN7 8-way connector
❑
CN10 3-way connector
❑
CN11 3-way connector
❑
CN12 6-way connector
❑
CN13 6-way connector
❑
CN14 6-way connector
❑
CN15 10-way connector
❑
CN16 SMB connector
❑
CN17 SMB connector
❑
CN18 SMB connector
❑
CN22 QMA connector
❑
CN23 QMA connector
❑
CN24 QMA connector
❑
CN25 SMB connector
❑
CN26 SMB connector
❑
CN27 SMB connector
(3)
The Combiner BIT module is secured from both sides of the chassis thus requiring removal of
the Power Supply modules. Refer to page 14 and remove both Power Supply modules.
(4)
Removal of the Power Supply modules will expose the six M3 x 6 mm countersunk screws that
secure the Combiner BIT module heatsink to the chassis. Remove these six screws.
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(5)
Remove the six M3 nuts that secure the Combiner BIT module PCB to the stud spacers. Also
remove the two M3 x 8 mm panhead screws that secure the Combiner BIT module heatsink to
the lower PA heatsink. The Combiner BIT module can now be removed.
Refitting
(1)
Place the Combiner BIT module in place on the stud spacers and replace the six washers and
nuts but do not tighten. Take care that cables are dressed properly and that none are trapped.
Replace the two screws that secure the Combiner BIT module to the PA heatsink, but do not
tighten.
(2)
Turn the unit over and replace the six countersunk M3 x 6 mm screws. Tighten these and return
to the other side to tighten the six nuts and two screws.
(3)
All 22 connectors removed earlier can now be reconnected. Refer to Fig 6 and Fig 7, if
necessary.
(4)
Re-establish the ac and/or dc supplies.
(5)
Switch power on at the radio using the rear mounted Power switch.
(6)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(7)
Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure
To Calibrate the Transmitter on page 26.
(8)
Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.
(9)
Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the
transmitter from the ac and/or dc supplies.
(10) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.
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Removing and Refitting the PA Modules
Caution
Repairs
When carrying out repairs to the PA module, care must be taken not to damage the gasket.
If the strips become damaged, they must be replaced. Failure to comply with this instruction
may compromise the transmitter Electromagnetic Compatibility (EMC) and breach European
Commission regulations.
When screws are inserted into the transmitter PA casting care must be taken not to exceed
a torque of 6 Ibs/inch when tightening. This applies when replacing the top and bottom
covers and during the refitting of the PA modules.
The PA modules are located one above the other on the right side of the transmitter as shown in Fig 5.
The module removal diagram is shown in Fig 13. At the transmitter rear panel, each PA module is
fastened to the chassis with two M3 x 8 mm panhead screws. At the front, the modules are fastened with
one countersunk screw each, one at the top (PA-1) and one at the bottom (PA-2). They are also secured
to the front panel with two M5 x 20 mm panhead screws that also fix the right-hand equipment handle.
WARNING
Dangerous Voltages
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove one or both PA modules, ensure that the transmitter is isolated from the ac
and dc input supplies. Then proceed as follows:
(1)
Remove the transmitter top and bottom covers.
(2)
Disconnect CN3, a flying 3-way connector from the Combiner BIT module, CN5 (PA-1) and/or
CN6 (PA-2).
(3)
At the Combiner BIT module disconnect the 6-way CN13 (PA-1) and/or CN14 (PA-2). Also
remove the two M3 x 8 mm panhead screws that secure the Combiner BIT module heatsink to
the lower PA module heatsink.
(4)
Disconnect the SMB connectors CN8 from PA-1 (upper) and PA-2 (lower). Disconnect SMB
connector CN10 from the lower PA using long nosed pliers; do not pull on the cable. On the lower
PA remove the screw securing the p-clip that holds the coaxial cable coming from the type-N
connector at the rear.
(5)
Disconnect the type-N connectors at the rear of the PA modules.
(6)
Remove the four countersunk M3 x 6 mm screws that hold the front panel to the chassis.
(7)
Remove the equipment handle from the right-hand side of the transmitter by unscrewing and
removing the two M5 x 20 mm panhead screws that secure it. Loosen (but do not remove) the
two screws securing the left-hand equipment handle so that the front panel can be pulled slightly
away from the PA heatsinks.
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Maintenance
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(8)
Remove the two screws holding the upper heatsink to the rear panel and the countersunk screw
securing it to the front of the chassis. Slowly withdraw the upper PA module from the mainframe
taking care not to snag the wiring looms. Note that SMB connector CN10 is located within the
bottom of the heatsink fins and should be disconnected using long nosed pliers. Do not attempt
to remove the connector by pulling on the cable.
(9)
Remove the two screws holding the lower heatsink to the rear panel and the countersunk screw
securing it to the bottom of the chassis in front. Slowly withdraw the lower PA module from the
mainframe taking care not to snag the wiring looms.
Refitting
To refit the PA modules, proceed as follows:
(1)
Place the lower PA module in position and secure it in place with the single countersunk screw
at the front and the two panhead screws at the rear. Replace the two screws that secure the
Combiner BIT module to the PA heatsink. Connect the SMB connector CN10.
(2)
Route the coaxial cable with the type-N connector out the rear of the module and connect to CN1.
Replace the p-clip that was removed earlier. Ensure no wires are trapped by the module.
(3)
Next, while placing the upper PA module in position, first connect SMB connector CN10 before
replacing the two rear screws and the front countersunk screw. Route the coaxial cable from
Combiner BIT module out between the PAs via the heatsink groove. Connect the type-N to CN1.
(4)
Fit the four countersunk screws, previously removed, that secure the front panel to the chassis,
two at the top and two at the bottom. Replace the right-hand handle and tighten the screws
securing the left-hand handle.
(5)
Connect the SMB connectors CN8 on both modules and CN13 (PA-1) and CN14 (PA-2) at the
Combiner BIT module.
(6)
Connect the two flying 3-way connectors CN3 that come from CN5 (PA-1) and CN6 (PA-2) on
the Combiner BIT module.
(7)
Re-establish the ac and/or dc supplies and switch power on at the radio using the rear mounted
Power switch.
(8)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(9)
Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure
To Calibrate the Transmitter on page 26.
(10) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.
(11) Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the
transmitter from the ac and/or dc supplies.
(12) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.
T6T VHF 100 W Transmitter
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Removing and Refitting the Front Panel Assembly PCB
The Front Panel assembly PCB is located as shown in Fig 14. Removing this assembly necessitates the
removal of both Power Supply modules and partial removal of the Combiner BIT module.
WARNING
Dangerous Voltages
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove the Front Panel assembly PCB, ensure that the transmitter is isolated from
the ac and dc input supplies. Then proceed as follows:
(1)
Remove the transmitter top and bottom covers.
(2)
Disconnect CN4 (34-way ribbon cable) at the Processor module. Carefully push the cable
through the aperture to the other side of the chassis.
(3)
Refer to the instructions for removal of the Combiner BIT module, but do not remove any
connectors. The Power Supply modules must be removed and the Combiner BIT module’s
securing screws must be removed so that it can be lifted slightly away from the chassis. This
permits the ribbon cable to pass under the Combiner BIT module.
(4)
Disconnect SMB connector CN5 at the PA Control module (note how the cable is routed to the
front panel).
(5)
Remove the two handles from the front panel by removing the four M5 x 20 mm panhead screws.
(6)
Remove the four countersunk M3 x 6 mm screws that hold the front panel to the chassis. The
front panel can now be moved away from the mainframe while guiding the ribbon and coaxial
cables from within.
(7)
With the front panel free from the mainframe, release the control knob by unscrewing the Allen
head grub screw using a 1.5 mm Allen key. Withdraw the control knob from the spindle.
(8)
Remove the Front Panel PCB from the Front Panel assembly by removing the six M3 x 6 mm
panhead screws and wavy washers.
Refitting
To refit the Front Panel assembly PCB, proceed as follows:
(1)
Place the PCB in position on the front panel. Ensure the spindle of the control knob and
microphone/diagnostics connector are correctly located. Secure the PCB to the Front Panel
assembly using the six M3 x 6 mm panhead screws and wavy washers previously removed.
(2)
At the front panel, place the control knob onto the spindle and using a 1.5 mm Allen key, secure
the Allen head grub screw.
(3)
Feed the ribbon and coaxial cables through their respective holes at the front of the chassis
(4)
Secure the Front Panel assembly to the top and bottom of the chassis using the four M3 x 6 mm
countersunk screws. Fit the two equipment handles using the four M5 x 20 mm panhead screws
previously removed.
(5)
Route the ribbon cable under the Combiner BIT module, through the aperture to the Processor
module and connect it to CN4.
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(6)
Route the coaxial cable SMB connector to CN5 on the PA Control module and connect it.
(7)
Re-establish the ac and/or dc supplies.
(8)
Switch power on at the radio using the rear mounted Power switch.
(9)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(10) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.
(11) Set the rear panel Power switch to Standby. Isolate the transmitter from the ac and/or dc
supplies.
(12) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.
Removing and Refitting the Cooling Fans
The cooling fans are mounted at the rear of the PA modules as shown in Fig 5. The removal diagram is
shown in Fig 15.
WARNING
Dangerous Voltages
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove the fan, ensure that the transmitter is isolated from the ac and dc input
supplies. Then proceed as follows:
(1)
Disconnect the two-pin connector.
(2)
Remove the fan finger guard.
(3)
Using an Allen key inserted through the holes exposed when the finger guard is removed,
remove the three M4 x 12 mm caphead Allen screws that secure the fan to the PA module
heatsink.
(4)
Remove the fan from the PA module.
Refitting
To refit a cooling fan, proceed as follows:
(1)
Locate the fan in position and using a suitable Allen key inserted through the holes for the fan
finger guard, secure using the three M4 x 12 mm caphead Allen screws previously removed.
(2)
Secure the finger guard to the fan.
(3)
Connect the two-pin fan connector to the fan. Ensure the + marked socket mates with the +
marked plug on the fan.
(4)
Re-establish the ac and/or dc supplies.
(5)
Switch power on at the radio using the rear mounted Power switch.
(6)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. The transmitter can
now be returned to service.
T6T VHF 100 W Transmitter
Page 21
Maintenance
Back to Transmitter
Main Page
Virtual Front Panel (VFP)
Virtual Front Panel (VFP) software is supplied on CD-ROM and is compatible with any PC or laptop
running Windows 2000™ or Windows XP™. The VFP allows changes to a radio’s settings and channel
information, it displays the current BIT state, displays BIT history, allows security locks to be set, and
provides maintenance facilities.
A radio can be set up using the front panel Scroll/Select switch and LCD, or by using the VFP. Using the
VFP has several advantages over setting the transmitter from the front panel; these are:
❑
A profile of the transmitter’s operation settings and channel information can be created, stored on
disk, and then recalled to download into other transmitters
❑
A print out of the transmitter’s profile can be made from the VFP
❑
Front Panel Lock is available only when using the VFP. As part of the transmitter’s Settings (see
Fig 2), Front Panel Lock can be set to ON. When selected to on, no settings or frequency
information can be changed from the front panel
❑
If the transmitter is part of a MARC system or operates in a digital mode, a MARC Lock, HDLC
Lock and T1E1 Lock are available when using the VFP. When selected to on, no settings or
frequency information can be changed from the MARC equipment screen, or the digital control
equipment.
Fig 2 Typical VFP Screen - AM-Voice Profile Shown
T6T VHF 100 W Transmitter
Page 22
Maintenance
Back to Transmitter
Main Page
Installing the VFP Software
The VFP software is supplied by Park Air on CD-ROM. The software can be run from the Main page or
installed on your PC via Explorer.
To install the software onto your PC:
(1)
Using explorer, display the contents of the CD-ROM supplied by Park Air. Identify the file named
S0473Vxx.EXE (where xx is the version number).
(2)
Using the mouse, right click on the file and then select Copy.
(3)
Display the Windows desktop. Right click anywhere on the desktop and select Paste.
(4)
Check that the VFP icon is shown on the desktop. Reposition the icon as required. The VFP
application is now installed on the PC’s desktop.
VFP Icon
VFP Features
The VFP screen is divided into four main windows: Settings, Channels, BIT and Status Information. Four
colours are used to display text. The colours have the following meanings:
❑
Black indicates a valid parameter that has been accepted by the radio.
❑
Red indicates an invalid parameter that has been rejected by the radio, or a BIT failure.
❑
Green indicates text that has not yet been downloaded to the radio. Text loaded into the VFP from
a previously stored file, or any text that is manually amended is green until it is downloaded into
the radio; after being downloaded into the radio the text changes to black, or if it is invalid, to red.
❑
Blue indicates Help text and is shown in the Status Information window.
The Menu Bar
The menu bar has four categories: File, Serial Port, Radio and Help.
File
Has the sub-categories: Open, Save and Print. These sub-categories allow the user to
open previously saved profiles, save a new profile, or print a profile.
A special sub-category: File > Save > Diagnostics should only be used when advised by
Park Air.
Serial Port
Has the sub-categories: Com 1 and Com 2. Before the VFP can be used, the appropriate
Com 1 or Com 2 must be selected to correspond with the PC’s Com Port used for the
radio connection.
Radio
Has the sub-categories: Retrieve, Send, Calibrate and Test.
This category allows a radio’s profile to be loaded into the VFP, allows a profile to be
downloaded from the VFP to a radio, calibrates a radio and initiates a BIT test.
Help
Provides detail about the VFP software.
T6T VHF 100 W Transmitter
Page 23
Maintenance
Back to Transmitter
Main Page
Settings Window
This window lists all attributes that can be adjusted by the user. If any individual attribute is clicked on
using the mouse, help information is displayed in the Status Information window showing the range of
adjustment for that attribute. Click on the value and use the keyboard to amend it; press Enter to confirm
the new value noting that the amended text is green until it is downloaded into the radio.
Any invalid parameters are not indicated until the Settings are downloaded to the radio. It is the radio that
rejects invalid parameters, not the VFP.
The transmitter reference frequency setting is displayed in the window. Adjusting the reference
frequency is a maintenance operation that requires external test equipment to be connected. The value
shown in the Settings window should not be changed; instead, adjustment of the reference frequency
should be performed using the radio front panel controls as detailed on page 3.
Channels Window
Up to 100 preset channels can be stored in the radio. These are listed in the Channels window. Any
channel frequency can be amended by clicking on the value to amend it and pressing Enter to confirm
the new value. Note that the amended channel is green until it is downloaded into the radio.
Any invalid frequencies are not indicated until the Channels are downloaded to the radio. It is the radio
that rejects invalid frequencies, not the VFP.
BIT Window
Two lists of information are presented. The current BIT status and the BIT history. The BIT history shows
the last 100 entries.
Status Information Window
The Status Information window gives information regarding the type of radio, the software fills, recent
VFP actions and Help information.
To Change the Transmitter’s Profile or Save a Profile
(1)
Using a radio to PC Serial Interconnection Lead, Park Air part number 17E12600001, connect
the radio’s front panel Microphone/Diagnostics connector to the PC’s Com Port 1 or Com Port 2
(note which Com Port is used).
(2)
Run up the VFP software and check that a blank VFP screen (see Fig 3) is displayed.
T6T VHF 100 W Transmitter
Page 24
Maintenance
Back to Transmitter
Main Page
Fig 3 Blank VFP Screen
(3)
At the Menu Bar, click on Serial Port and select either Com 1 or Com 2. The selection must
correspond to the port used to connect to the radio.
(4)
Load the required information from the radio, or from a stored file. The required information can
be radio settings, frequency channels, BIT information, or all of these.
To load a previously stored file, select File > Open > All
or, File > Open >Settings
or, File > Open > Channel
or, File > Open > BIT
To load information from the radio, select Radio > Retrieve > All
or, Radio > Retrieve > Settings
or, Radio > Retrieve > Channel
or, Radio > Retrieve > BIT
(5)
If required, amend any radio Settings or Channel information.
(6)
Download the radio’s profile as shown on the VFP screen to either the radio, or to a file.
To download into the radio, select Radio > Send > All
or, Radio > Send > Settings
or, Radio > Send > Channel
To download to a file, select File > Send > All
or, File > Send > Settings
or, File > Send > Channel
or, File > Send > BIT
T6T VHF 100 W Transmitter
Page 25
Maintenance
Back to Transmitter
Main Page
(7)
Check that after downloading to a radio, no invalid parameters are returned (such parameters
are displayed as red text). If there are invalid parameters, amend them and then repeat the
download.
(8)
When there is no further requirement for using the VFP, exit the VFP software and disconnect
the radio from the PC.
To Initiate a BIT Test
During an interruptive BIT test, the transmitter radiates modulated carrier waves at the set power.
Users should therefore obtain the necessary authority before initiating a test.
If the test is to be carried out with the antenna disconnected, ensure a load is fitted to the
transmitter's Antenna connector.
In order to test the line input stages, an internally generated 1 kHz tone is injected into the line input
circuit. Any other audio present on the line input will cause the test to be inaccurate. Therefore the
transmitter MUST NOT be keyed during the test.
(1)
Using a radio to PC Serial Interconnection Lead, Park Air part number 17E12600001, connect
the radio’s front panel Microphone/Diagnostics connector to the PC’s Com Port 1 or Com Port 2
(note which Com Port is used).
(2)
Run up the VFP software and check that a blank VFP screen is displayed.
(3)
At the Menu Bar, click on Serial Port and select either Com 1 or Com 2. The selection must
correspond to the port used to connect to the radio.
(4)
At the Menu Bar select Radio > Test.
(5)
An interruptive BIT test now takes place. The results are displayed in the BIT window.
(6)
If there is no further requirement for using the VFP, exit the VFP software and disconnect the
radio from the PC.
To Calibrate the Transmitter
(1)
Connect a dummy load via a power meter to the transmitter Antenna connector.
(2)
Remove the transmitter’s bottom cover.
(3)
Using a radio to PC Serial Interconnection Lead, Park Air part number 17E12600001, connect
the radio’s front panel Microphone/Diagnostics connector to the PC’s Com Port 1 or Com Port 2
(note which Com Port is used).
(4)
Run up the VFP software and check that a blank VFP screen is displayed.
(5)
At the Menu Bar, click on Serial Port and select either Com 1 or Com 2. The selection must
correspond to the port used to connect to the radio.
(6)
At the Menu Bar select Radio > Retrieve > All.
(7)
At the Menu Bar select Radio > Calibrate. The Confirm screen will then be displayed to remind
you that a dummy load must be connected before proceeding.
T6T VHF 100 W Transmitter
Page 26
Maintenance
Back to Transmitter
Main Page
(8)
With the Confirm screen displayed and dummy load connected, select Yes to continue with the
calibrate routine. The Progress screen will then be displayed.
(9)
When the PA Control/PA loop has been calibrated the Progress screen disappears and the VFP
screen reappears showing a calibration complete message in the Status Information window.
(10) Gain access to the PA Control module and identify RV8 (see Fig 4). From the transmitter front
panel AM-Voice or AM-MSK Settings screen, select PTT On.
(11) From the Settings window of the VFP screen, note the RF power setting. Adjust RV8 until the
power meter reads this value.
(12) From the transmitter front panel AM-Voice or AM-MSK Settings screen select PTT Off, then
remove the power meter and dummy load. This completes the calibration routine.
(13) When there is no further requirement for using the VFP, exit the VFP software and disconnect
the radio from the PC.
T6T VHF 100 W Transmitter
Page 27
Maintenance
Back to Transmitter
Main Page
Location of RV8
Small Screening Can
RV8
R135
R125
R131
C421
R382
R130
RV8
D24
R456
R243
R455
TP10
CN4
R231
C424
R348
Fig 4 Location of PA Control Module RV8
T6T VHF 100 W Transmitter
Page 28
Maintenance
TOP
PSU Regulation
Module
PA-1
Cooling Fans
Processor Module
PSU-1
PSU-2
SIDE
Back to Transmitter Main Page
FRONT
PA-2
Fig 5 T6T 100 W Module Location Diagram
PA Control
Module
Combiner
BIT Module
REAR
BOTTOM
CN7-4
CN7-3
CN7-2
CN7-1
T TIP
T RING
n/c
R TIP
R RING
Name
T:G.703(E1)
ANSIT1.403-1995(T1),ITU-
T:G.703(E1)
ANSI T1.403-1995 (T1), ITU-
Characteristic
CN7-5
n/c
Connections
CN7-6
n/c
PinNumber
CN7-7
HDLC CLA
HDLC RxB
RS422
RS422
RS422
RS422
RS422
CN7-2
HDLC TxB
RS422
Characteristic
CN7-3
HDLC TxA
0V
Name
CN7-4
HDLC CLB
21.6V to 32V
HDLC RxA
n/c
CN7-8
Connections
Pin Number
CN7-5
Ground
CN7-1
CN7-6
Unregulated Supply
Ground
Remote Supply On/Off
Data TxA (DataOut-)
Data TxB (DataOut+)
n/c
Data RxB (Data In+)
Data Rx A (Data In -)
21.6V to 32V
0V
RS422
RS422
RS422
RS 422
Characteristic
Unregulated Supply
Name
CN7-7
CN7-8
Connections
PinNumber
Not used
Not used
Fast Antenna
Change Over/PTT
LineIn+
LineIn-
Name
+20dBm to -20dBm 600R
+20dBm to -20dBm 600R
NPN Open Collector
Grounding Transistor
+20dBm to -20dBm 600R
+20dBm to -20dBm 600R
Characteristic
Connections
Not used
Ground
PTT Input
0V or +10V to +60V or
-10V to -60V at 6mA
0V
0V or +10V to +60V or
-10V to -60V at 6mA
PinNumber
17
26
FrontPanel
22
CN3
21
CN5
17
CN1
CN5
Facilities
CN1
(Front Panel)
ReferenceFrequency
CN2
1L
2N
3E
CN8
Processor
CN2
CN4
24
23
17
Mains IEC
Connector
Filtered/
Fused
(Rear Panel)
Ac Input
20
CN6
20
Ac Input
Dc Input - 2
(Rear Panel)
Mains IEC
Connector
Filtered/
Fused
CN1
PA Control
CN5
(Rear Panel)
25
(Rear Panel)
Dc Input - 1
(Rear Panel)
Back to Transmitter Main Page
CN3
CN4
CN4
CN5
CN6
CN8
CN3
CN9
1L
2N
3E
CN1
CN6
Fig 6 Wiring and Interconnection Diagram
EXT
MARC SPKR
Supply shown in
off position
(Rear Panel)
CN7
1 2 3
Power Supply Regulation
CN2
Microphone/
Diagnostics
CN7 A B C D
T1/E1
HDLC
MARCDATA
MARCAUDIO
PSU-1
PSU-2
18
CN4
CN1
18
CN24
CN14
CN6
CN25
CN18
CN23
CN13
CN5
CN26
CN17
CN22
CN12
CN7
T6 100 W Combiner BIT
CN10
CN1
19
CN2
CN11
CN3
CN16
CN4
CN1
CN27
19
CN3
CN4
CN4
CN15
CN2
11
Fan
11
Fan
14
13
12
14
13
12
10
10
17
16
CN10
CN3
CN2
CN4
CN5
CN7
CN9
CN12
CN6
CN10
CN3
CN2
CN4
CN5
CN7
CN9
CN12
CN6
(Rear Panel)
15
CN1
CN8
CN1
CN8
15
PA-1
PA-2
MARC Port
Line In-
Line In+
Ground
+20dBm to -20dBm 600R
+20dBm to -20dBm 600R
0V
CN1-4
CN1-3
CN1-2
CN1-1
Processor
Connections
CN1-4
CN1-3
CN1-2
CN1-1
PA Control
RF AGC (Not used)
Ground
IF AGC (Not used)
Ground
0 to 2.5V
0V
0 to 2.5V
0V
T6 100 WCombiner BIT
Connections
Unregulated Supply
Fused 500mA, 21.6 to 32V
CN1-5
CN1-5
Ground
0 to 2.5V
0V
CN17-1
CN25-1
0V
CN26-1
CN18-1
CN8
CN10
Name
Characteristic
17 dBm
Characteristic
Forward Power Sense
Name
1 dBm carrier
5 to 50 W
Characteristic
RF Drive
Name
RF Output
CN4-2
CN1-4
CN1-3
CN1-2
LCD R/W
LCD RS
LED Tx
LED Standby
LED Ready
LED Alarm
Name
TTL
TTL
TTL
Open collector (20 mA)
Open collector (20 mA)
Open collector (20 mA)
Open collector (20 mA)
Characteristic
24
CN4-3
CN1-5
LCD Enable
TTL
Connections
CN4-4
CN1-6
TTL
CN1-1
CN4-5
CN1-7
Data 0
TTL
Front Panel
CN4-6
CN1-8
Data 1
CN4-1
CN4-7
CN1-9
Processor
CN4-8
CN1-10
Data 2
CN1-14
CN1-13
CN1-12
CN1-11
CN1-14
CN1-13
CN1-12
CN1-11
Frequency Trim
Ground
Ground
0 to 4V/0 to 6V
0V
0 to 2.5V
0V
CN12-3
CN12-1
T6 100 WCombiner BIT
Connections
CN6-2
CN6-1
Regulation
PSU ok
0V
0V ok
0V
CN4-14
CN4-13
CN4-12
CN4-11
CN1-14
CN1-13
CN1-12
Data 6
Data 5
Data 4
TTL
TTL
TTL
TTL
CN4-9
Data 3
3Vac pk-pk max
3Vac pk-pk max
CN1-1
PA - 1 PA - 2
15
PA - 1 PA - 2
14
PA - 1 PA - 2
13
Back to Transmitter Main Page
PTT Input
Connections
Connections
CN6-5
Connections
Ground
T6 100 WCombiner BIT
CN1-6
±2.5V
CN22-1
CN1-7
0V
CN1-6
BIT I Monitor
±2.5V
CN1-7
Ground
RS422
CN1-8
BIT Q Monitor
RS422
CN1-9
Data RXB Data In+
CN1-8
CN1-10
Data RXA Data InRS422
CN1-9
Data TXB Data Out+
CN1-10
RS422
CN6-7
CN6-8
Data TXA Data Out-
CN1-11
External Speaker Drive
CN23-1
CN4-10
External Speaker
External Speaker Drive
Characteristic
Connections
Name
Processor
16
CN8 Tip
Ground
Characteristic
CN8 Ring
CN5-4
CN5-3
CN5-2
CN5-1
Processor
Connections
Facilities
Unregulated Supply
Ground
Squelch Defeat (not used)
Antenna change-over
Antenna change-over
External VSWR
PTT
E-Bit
Ground
TTL pull-up active low
Fused 300mA 21.6 to 32V
0V
TTL pull-up activel ow
Grounding output +/-60V,100mA max
Grounding output +/-60V,100mA max
TTL pull-up active low
Grounding output+/-60V,100mAmax
TTL pull-up active low
0V
0V
CN1-29
CN1-28
CN1-27
CN1-26
CN1-25
CN1-24
CN1-23
CN1-22
CN1-21
CN1-20
CN1-19
CN1-18
CN1-17
CN1-16
CN1-15
CN1-29
CN1-28
CN1-27
CN1-26
CN1-25
CN1-24
CN1-23
CN1-22
CN1-21
CN1-20
CN1-19
CN1-18
CN1-17
CN1-16
CN1-15
PA Count
Phase Load
Clock
Data
Synth Load
Ground
Filter 4
Filter 3
Filter 2
Filter 1
Filter 0
Ground
Power Down
Tx/Rx Detect
TTL, Pulse width = 10ms/50W PA
TTL
TTL
TTL
TTL
0V
TTL
TTL
TTL
TTL
TTL
0V
TTL pull-up active low
TTL
CN7-6
CN7-5
CN7-4
CN7-3
CN7-2
CN7-1
T6 100WCombiner BIT
Connections
CN12-6
CN12-5
CN12-4
CN12-3
CN3-2
CN3-3
CN2-2
CN2-1
CN1-3 & 4
CN1-1 & 2
Regulation
CN6-6
CN6-5
CN6-4
CN6-3
Pin Diode - ve
Ground
DC Derived Supply
Ground
AC Derived Supply
Ground
PSU off
0V
PSU off
PSU ok
-30v to -35v
0v
21.6v to 32v
0v
29v
0v
0V=off
0V
0V=on
o/c ok
CN4-27
CN4-26
CN4-25
CN4-24
CN4-23
CN4-22
CN4-21
CN4-20
CN4-19
CN4-18
CN4-17
CN4-16
CN4-15
CN1-27
CN1-26
CN1-25
CN1-24
CN1-23
CN1-22
CN1-21
CN1-20
CN1-19
CN1-18
CN1-17
CN1-16
CN1-15
Push
Turn-
Turn+
LED RX (not used)
Ground
+15V Supply
Ground
-5 V Supply
Receive Data
+5 V Supply
Transmit Data
LCD Backlight
Data 7
5 V pull-up
5 V pull-up
Open collector (20 mA)
0V
+15V
-5 V
RS232
+5 V
RS232
Open collector (200 mA)
TTL
12
Reserved
Tape Output
Ready Output
RSSI (notused)
n/c
-10dBm, 100R
Open collector, 0V=Ready
Potential range 0V to 10V
CN1-33
CN1-32
CN1-31
CN1-30
CN1-33
CN1-32
CN1-31
CN1-30
PAC Temperature
Reflected Power
PA Temperature
Auto Level Control
10mV/°C
0to2.5V
10mV/°C
0 to 5V (5V3dB backoff)
TTL
CN10-1
T6 100WCombiner BIT
Connections
CN7-8
13
Characteristic
CN5-5
TTL pull-up active low
14
Name
CN5-6
Inhibit
CN5-12
15
5 V pull-up
2 V p-p maximum
3 Vac pk-pk
0V
0V
0 V=PTT, 5V pull-up = PTT
1.6V p-p maximum
Mic PTT
Loudspeaker Amp Drive
CN1-28
Ground
CN1-29
Mic Input
CN4-28
CN1-31
21.6v to 32v
CN1-32
n/c
CN4-30
CN1-33
V Unregulated
CN4-31
n/c
CN4-32
CN3-1
CN4-33
Ground
Characteristic
Sidetone (HeadsetDrive)
0 V = off
CN1-30
Name
CN4-29
PSU off
n/c
CN4-1
CN11-1
PSU-1 PSU-2
0V
CN5-7
BIT Interruptive Test
CN5-13
Characteristic
CN5-8
10
CN5-14
Name
CN5-9
11
17
CN5-10
CN7-7
CN5-11
CN5-15
Characteristic
0V
CN11-2
Ground
CN11-3
Name
CN10-2
25
CN10-3
CN1-34
TTL
CN4-34
TTL
Connections
TTL
TTL, high = PSU on
External VSWR
0V
Narrow/Wide (Not used)
dc OK
BITControl0
Ground
CN1-34
CN4-2
CN1-35
CN4-3
CN1-36
Characteristic
CN1-34
Name
+15 V
CN1-35
+15 V
CN1-36
Connections
PAControl
Connections
Regulation
TTL
Characteristic
BIT Control 1
Name
CN1-37
Processor
CN2-1
19
CN1-37
Ground Supply
n/c
CN1-5
IF
CN3-1
+5 V
CN1-1
T6 100WCombiner BIT
+15 V Supply
TTL
+15 V Supply
TTL
Connections
T6 100W Combiner BIT
CN6-1
BIT Open Loop
29 V
CN6-2
BIT Synth Lock
Ground Supply
29 V
CN5-1
CN1-38
V Unreg
CN5-2
CN1-39
CN1-6
V Unreg
0V
CN1-38
CN1-1
CN2-2
CN4-1
CN4-2
n/c
Ground Supply
Dc Input
n/c
0V
Fused 21.6 to 32V
Connections
CN5-10
CN5-9
26
CN6-10
Name
DC Detect
Characteristic
n/c
PSU-1 PSU-2
CN1-39
CN3-2
CN1-2
Characteristic
CN3-3
+5 V
CN1-2
CN3-4
0V
CN1-3
+5 V Supply
TTL
CN1-4
CN6-3
BIT Loop Correct
TTL
CN2-1
Characteristic
CN5-3
CN1-40
TTL
20
0V
CN1-40
RFPA Bias Disable
BIT VSWR OK
T6 100WCombiner BIT
PA Control
CN1-41
Connections
0V
CN1-42
TTL -High fan on
Input-1
DC Input - 1 DC Input - 2
+5 V Supply
CN1-41
TTL
TTL -Low OCXO fitted
Input-2
Ground
CN1-42
Fan Enable
TTL
Input-3
CN6-5
10mV / °C +0.5V
OCXO Fitted
TTL
CN6-4
PA Temperature
0.5V for +10dBm
Reserved
TTL
CN5-4
CN2-1
Drive Detect
CN1-43
Step Size (Not used)
TTL
CN5-5
CN15-1
CN2-2
CN1-44
TR Detect
-15 V
CN15-2
CN1-43
CN1-45
V/U Detect
-15 V
TTL High for bias on
CN1-46
BIT Control2 (Not used)
Ground
PA Bias Enable
CN1-44
CN1-47
CN6-6
CN2-3
CN1-45
CN1-48
CN5-6
CN15-3
CN1-46
CN1-49
n/c
50 W = 670mV
TTL High for fan on
CN1-47
-15 V Supply
TTL, Pulse width = 10ms/50 W PA
CN1-48
-15 V Supply
Fan Enable
CN1-49
AC Detect
PA Count
Reflected Power
Not Used
CN6-8
CN2-4
Not Used
CN6-9
CN2-5
Not Used
CN6-7
CN2-6
CN15-7
CN5-7
CN15-4
CN15-8
CN5-8
CN15-5
CN15-9
Regulation
CN3-2
CN3-1
Processor
+5 V Supply
+5 V Supply
+15 V Supply
+15 V Supply
0V
+5 V
+5 V
+15 V
+15 V
Characteristic
CN4-1
CN3-3
Ground
Name
CN4-2
CN3-4
21
7.5 V pk-pk Max
CN4-3
CN3-5
Connections
LoudspeakerOutput
0V
CN4-4
CN13-1
CN14-3
CN14-2
CN14-1
CN9
CN5
CN7
CN2
CN4
Reflected Power
Fan Enable
PA Bias Enable
Drive Detect
PA Temperature
50W = 670mV
TTL -High for fan on
TTL -High for bias on
0.5V for +10dBm
10mV / °C +0.5V
CN2-1
FrontPanel
Connections
Microphone/
Diagnostics
22
Transmit Data
Ground - Microphone
RS232
0V
CN4-9
CN4-8
CN4-7
CN4-6
CN3-9
CN3-8
CN3-7
CN3-6
AC Detect
-15 V Supply
-15 V Supply
Ground
15 V on, 0 V off
-15 V
-15 V
0V
FrontPanel
CN3-1
Ground
CN4-5
CN13-2
CN14-4
Characteristic
CN3-2
n/c
CN13-3
CN14-5
CN2-2
Name
TTL
11
BIT Control3 (Not used)
Connections
PA - 1
n/c
Characteristic
CN13-4
TTL, PW = 10ms/50W PA
T6 100W Combiner BIT
CN3-3
Name
CN13-5
PA Count
Open collector
CN12
21.6 to 32 V
CN14-6
21.6 to 32 V
V Unreg
0 V=off, open collector = on
DC Detect
V Unreg
n/c
CN3-11
Remote on/off
CN3-10
CN3-12
n/c
CN4-10
CN3-13
CN4-11
CN4-12
CN3-14
0V=PTT, 5V pull-up = not PTT
CN4-13
RS232
3 Vac pk-pk, 200R
CN4-14
Receive Data
Sidetone (HeadsetDrive)
6k8 input impedance, 5mV sensitivity
MIC PTT
Microphone Input
0V
CN2-5
Ground
CN2-6
CN2-3
21.6 to 32V
CN2-7
CN2-4
-30V to -35V
Characteristic
V Unreg
0V
Name
-33V
PA - 1
CN3-1
Ground Supply
T6 100W Combiner BIT
CN6-1
CN3-2
Connections
CN13-6
12
Name
CN15-6
Name
18
Tx Key
CN8 Sleeve
Name
CN6-9
CN6-6
Characteristic
Processor
Name
CN6-1
Characteristic
CN6-2
Name
CN6-3
T6 100 WCombiner BIT
CN6-4
0V or +10V to +60V or
-10V to -60V at 6mA
PA - 2
CN1-50
Characteristic
17 dBm
CN1-50
Name
Forward Power Sense
10 to 100 W
Characteristic
1 dBmcarrier
Characteristic
RF Output
Name
RF Drive
Name
Not Used
CN3-1
PA Control
CN4-1
PA Control
Antenna Port
PA - 2
CN15-10
Connections
T6 100 WCombiner BIT
CN27-1
Connections
CN16-1
T6 100 WCombiner BIT
Connections
PA
CN4-1
CN5-1
CN3-3
Characteristic
CN6-2
Name
CN6-3
Characteristic
Front Panel
23
CN5-2
Name
Connections
CN5-3
10
PA Control
RFPA 2
10 V approx or 26.5V
RFPA 2
0V
Connections
Ground
Fan Control
-20 dBm to 0 dBm
Fan
Reference Frequency
Fan
CN4-1
CN6
CN5-1
PA Heatsink
Fig 7 Wiring List
CN6
CN3
CN1
CN4
Back to Transmitter Main Page
CN5
Fig 8 Processor Module - Removal and Refitting Detail
CN2, CN6, CN7
Back to Transmitter Main Page
CN5
CN4
CN1
CN3
Fig 9 PSU Regulation Module - Removal and Refitting Detail
CN4
Back to Transmitter Main Page
CN3
CN2
CN6
CN5 (behind box)
CN1
Fig 10 PA Control Module - Removal and Refitting Detail
Bit Combiner to PSU (fan control)
PSU to Bit Combiner (dc Connections)
Back to Transmitter Main Page
PSU 2
PSU 1
Bit Combiner to PSU (fan control)
PSU to Bit Combiner (dc Connections)
Fig 11 Power Supply - Removal and Refitting Detail
CN18
CN17 CN16
CN23
CN22
CN27 CN25 CN24
Connector
Locations
CN15
CN14 CN13
CN26
Back to Transmitter Main Page
CN2 CN4
CN1 CN3
CN11 CN10
CN12
CN5
CN6
CN7
Fig 12 Combiner BIT Module - Removal and Refitting Detail
Back to Transmitter Main Page
Fig 13 PA Modules - Removal and Refitting Detail
PA 1
PA 2
Back to Transmitter Main Page
Fig 14 Front Panel and Front Panel Assembly PCB Removal and Refitting Detail
power connections here
Finger guard
AIRFLOW
Back to Transmitter Main Page
Fig 15 Cooling Fans - Removal and Refitting Detail
Back to Transmitter Main Page
Intentionally Blank

---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
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PDF Version                     : 1.4
Linearized                      : No
Create Date                     : 2005:02:11 10:44:21Z
Modify Date                     : 2005:04:20 11:46:35+01:00
Page Count                      : 118
Creation Date                   : 2005:02:11 10:44:21Z
Mod Date                        : 2005:04:20 11:46:35+01:00
Producer                        : Acrobat Distiller 5.0.5 (Windows)
Author                          : ALLANH
Metadata Date                   : 2005:04:20 11:46:35+01:00
Creator                         : ALLANH
Title                           : file://///Mrgreedy/Common/SPECS.PDF
Has XFA                         : No

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