Park Air Systems B6350-S2 User Guide

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T6T 50 Watt VHF Multimode Transmitter

This documentation is applicable to transmitters at Mod strike 7

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MaintenanceInstallationOperationSpecification

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Approvals and

Standards

Approvals and Standards T6T VHF 50 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.

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Telecom CS-03.

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. The se limits are designed to provide reasona ble 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 dif ferent 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.

Specification

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This section gives the specification applicable to the T6T VHF 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.

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General Specification

The general specification applies to a transmitter irrespective of the selected operating mode. Sep arate listings are given for AM modes, Mode 2 and Mode 3.

Variants

The T6T VHF Multimode Transmitter is available in the variants as listed in Table 1.

Table 1 Transmitter Variants

Description Part Number Frequency Range Special Applications

50 watt standard frequency coverage transmitter

50 watt extended frequency coverage transmitter

50 watt, high stability, standard frequency coverage transmitt er

50 watt, high stability, extended frequency coverage transmitt er

B6350/NB/50 1 18 to 136.975 MHz Supports 2, 3 and 4- offset

carrier operation

B6350/WB/50 1 12 to 155.975 MHz Supports 2, 3 and 4- offset

carrier operation

B6350HS/NB/50 1 18 to 136.975 MHz Supports 5-offset carrier

operation

B6350HS/WB/50 1 12 to 155.975 MHz Supports 5-of fset carrier

operation

Frequency accuracy

All variants except HS Better than 1 ppm. HS variants Better than 0.3 ppm.

Number of Channels

All variants 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 240 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.

T6T 50 W VHF Transmitter Page 2 Specification

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Table 2 Power Consumption

Requirement Normal Operation

ac dc

Maximum 500 VA 12 A

Not Transmitting 60 VA 1 A

Dimensions and Weight

The dimensions and weight of the transmitter are:

Width 483 mm (19 inches). Height 88.9 mm (3.5 inches). The height occupies 2U of equipment cabinet

space.

Depth 430 mm (16.9 inches) measured from front panel to rear panel.

450 mm (17.8 inches) measured from front panel to rear of fan.

Weight 13.5 kg (29.76 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 radios operate to specification up to 15,000 feet. Additionally the

equipment is capable of storage at altitudes up to 50,000 feet without damage.

Shock and vibration The radios comply with shock and vibration protection MIL-STD-810E,

method 516.4, procedure VI - Bench Handling.

Ventilation The transmitters are cooled by an integral fan, 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 transmitters also include an additional temperature controlled fan contained in the power supply.

Warm up time All variants are fully operational to specification within 20 seconds

after switch on except the T6T HS, which is fully operational within 20 seconds but can takes up to 10 minutes to achieve frequency accuracy for offset carrier.

T6T 50 W VHF Transmitter Page 3 Specification

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AM Modes

The transmitter can operate in AM-Voice mode (st andard) and A M -MSK mo de (opt ional). The following specifications apply to both modes unless stated otherwis e.

Transmitter RF Characteristics

RF Power Outpu t

The RF carrier output power is a djustable in 1 W steps f rom 5 W to 50 W (as an option, the maxim um 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 V dc and 32 Vd c.

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.

Duty Cycle

All variants 100% continuous operation.

Channel Spacing

AM-Voice mode The transmitters are capable of both 25 kHz channel spacing and

8.33 kHz channel spacing.

AM-MSK mode 25 kHz.

Offset Carrier

Non-HS variants (AM-Voice) The non-HS T6T is capable of offsetting the carrier frequency to

provide 2, 3 and 4 carrier offset.

HS variants (AM-Voice) The HS T6T is capable of offsetting the carrier frequency to provide 2,

3, 4 and 5 carrier offset.

AM-MSK mode Offset carrier is not available.

Harmonic Outputs

All variants 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.

T6T 50 W VHF Transmitter Page 4 Specification

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Spurious Outputs

All variants 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

All variants 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-Voice mode uses Double Sideband (DSB) Amplitude Modulation

(AM) full carrier; emission designator 6K80A3EJN for 25 kHz channels and 5K00A3EJ N for 8.33 kHz channels.

AM-MSK AM-MSK mode uses Double Sideband (DSB) Amplitude Mod ulation

(AM) full carrier; emission designator 13K0A2DJN.

Modula tion Dept h

All variants The transmitter is capable of modulation depths up to 95%.

Hum and Noise

All variants 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%.

Frequency Response

25 kHz channel spacing 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.

8.33 kHz channel spacing 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.

Distortion

25 kHz channel spacing 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.

8.33 kHz channel spacing 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.

T6T 50 W VHF Transmitter Page 5 Specification

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Residual FM

All variants 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.

VOGAD

AM-Voice The VOGAD has an operational range of 30 dB. The VOGAD can be

disabled.

AM-MSK The VOGAD is disabled.

Mute

AM-Voice The mute level is set at 15 dB below the average speech line level

setting. The mute can be disabled.

AM-MSK The mute is disabled.

Differential Group Delay

AM-MSK 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

All variants Voice can be connected to the transmitter via the front panel

microphone connector. Voice can also be connect ed via the line inputs. Line level setting from -30 to +10 dBm.

PTT Tim e Out

All variants The time out period is adjustable from 2 to 510 seconds in 2 second

steps or can be disabled.

T6T 50 W VHF Transmitter Page 6 Specification

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Mode 2

This section gives the transmitter’s specification applicable to Mode 2 operation. Mode 2 parameters are identical to AM-Voice mode parameters with the following exceptions:

RF Power Rise Time

All models T he transmitte r 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 represen ting 000.

RF Power Decay Time

All models The output power decays by more than 20 dB within 2.5 symbols of

the middle of the final symbol.

Channel Spacing

All models 2 5 kHz ch annel spacing only.

Transmitter Modulation Characteristics

Mode

All models 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

All models The symbol rate is 10,500 symbols/second (±0.005%), resulting in a

nominal bit rate of 31,500 bits/s.

RMS Phase Error

All models T he RM S phase error is less than 3°. The error vector magnitude is

less than 6%.

Phase Acceleration

All models 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 50 W VHF Transmitter Page 7 Specification

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Mode 3

This section gives the transmitter’s specification applicable to Mode 3 operation. Mode 3 parameters are identical to AM-Voice mode parameters with the following exceptions:

RF Power Rise Time

All models T he transmitte r 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 represen ting 000.

RF Power Decay Time

All models The output power decays by more than 20 dB within 2.5 symbols of

the middle of the final symbol.

Channel Spacing

All models 2 5 kHz ch annel spacing only.

Transmitter Modulation Characteristics

Mode

All models 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

All models The symbol rate is 10,500 symbols/second (±0.005%), resulting in a

nominal bit rate of 31,500 bits/s.

RMS Phase Error

All models T he RM S phase error is less than 3°. The error vector magnitude is

less than 6%.

Phase Acceleration

All models 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.

End of document

T6T 50 W VHF Transmitter Page 8 Specification

Operation

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This document describes the controls, indicators, setting up and operating instructions applicable to the T6T VHF Multimode Transmitter.

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Controls , Indicators and Front Panel Connectors

This part details the purpose of all controls and indicators of the T6T transmitters.

Front Panel

The front panel’ s controls, indicators an d connectors are shown below and detailed in the following paragraphs.

Scroll/Select SwitchLCD

ALARM

TRANSMIT

READY

STANDBY

F r e q 1 1 8 .0 0 0 M H z C h 1 0 0 + 7 . 3 k H z M o d e A M V o i c e 1

P w r

SCROLL/

SELECT

REFERENCE

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. Use of the switch and LCD is fully detail ed in this section appl icable to th e particular operating mode. During normal operation, the LCD shows the operating frequency, the channel number (if the channel store f acility is used), the carrier offset (if used), and dis plays a graphical representa tion of instantaneous peak power.

The example LCD sc reen above shows the t ransmitter operating on 11 8.000 MHz; the frequen cy 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 det ected. BIT indications are classified as either Alarms or Alerts.

If an ‘alert’ condition is detected, the Alarm ind icator flashes, the Ready indicator remains lit, and the transmitter remains operational. A BIT ‘alert’ is indicated if:

❑ If the transmitter RF output powe r has redu ced from its setting by m ore than 1 dB but not more

than 3 dB.

❑ If 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.

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Standby Indicator

A red indicator that lights when the tra nsmitter is in stan dby m ode. When in standby mode, m os t 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 13.

Reference Connector

An SMB jack socket that allows a frequency counter to monitor the transmitter's reference frequency. This connector is used only for maintena nce purposes. The instruction s for checking and adjusting the reference frequency are given in the Maintenance section.

Microp ho ne / D i agnostics Connector

A dual purpose c onnect or t hat all ows ei ther a m icrophone, or a PC, t o be connected to th e trans mitter. The connector is a 7-pin self-locking DIN socket; the pin-out is shown in Table 1.

A microphone i s fitted to t his connector to enable the t ransmi tter to be operated in AM local mo de. 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 Mai ntenance section. The PC connections at the transmitter are s hown in

Table 2 on page 4.

Viewed from front

Table 1 Microphone/Diagnostics Connec tor - Audio Connections

Number

1 Microphone ground - 0 V. 3 Microphone PTT Input 0 V to PTT. 5 Sidetone Output 0 to 3 V pk-pk. 6 Micro phone input Input 2 to 35 mV rms on Passive setting and 8 to 140 mV rms on

7 Ground - 0 V.

Signal Input or

Output

Description

Active setting to remain in VOGAD range.

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Table 2 Microphone/Diagnostics Connector - PC Connections

Number

2 Transmit data Output RS232, 115200 baud, 8 data bits, 1 stop bit, no par it y, no

4 Receiv e data Input RS232, 115200 baud, 8 dat a bits, 1 stop bit, no parity, no

7 Ground - 0 V.

Signal Input or

Output

Description

handshaking.

Rear Panel Power Switch

The rear panel's power switch is a 2-way rocker switch used to select between power on, and standby.

WARNING

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.

Dangerous Voltages

= Standby= On

T6T VHF 50 W Transmitter Page 4 Operation

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Setting Up and Operation

Introduction

Setting up the transmitter involves sele cting various parameters using the Virtual Front Panel (VFP), through a Multi-Access Remote Control (MARC) system, from a T6 controller, or from the transmitter’s front panel. The transmitter can be configured for remote or local use.

Table 9 on page 30 details the functions and parameters that can be set from all these sources.

The rest of this document details how to configure the transmitter from the front panel, and how to operate the radio in local mode.

Selecting most of the transmitter's operational settings is carried out using the front panel Scroll/Select switch and the LCD (see the illustration below). No attempt to set up the transmitter should be made until the transmitter has been installed as per the installation procedures given in the Installation section.

Normal Operation

During normal operation, the LCD displays the Main screen. This screen shows the operating frequency, the channel number ( if the channel store f acility is used), the carrier offset (if used), and displ ays 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.

Scroll/Select SwitchLCD

ALARM

TRANSMIT

READY

STANDBY

F r e q 1 1 8 .0 0 0 M H z C h 1 0 0 + 7 . 3 k H z M o d e A M V o i c e 1

P w r

SCROLL/

SELECT

REFERENCE

MICROPHONE/ DIAGNOSTICS

Using the Scroll/Select Switch

The Scroll/Select switch (ref erred to throughout this section as the ‘Switch’) is used to l eave the Main screen and display the Control screen (see page 8). Further use of the Switch displays various selection menus and allows the required pa rameters to be set. The switch has three actions: it can be turned clockwise, anti-clockwise, or momentarily pushed in.

T6T VHF 50 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 . 0 0 0 M H z C h 1 0 0 + 7 . 3 k H z M o d e A M V o i c e P w r I I I I I I I I I I

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 50 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 V o i c e P w r I I I I I I I I I I

Main Screen

(Example)

Displayed during normal

transmitt er operation

Frequency

Set the

transmitter

operating

frequency

Backlight

Adjust the

display’s

backlight

Control Screen

Configure the transmitter

operating par ameters , access

the BIT facility or view the

software configuration

Channel

Set or reca ll up

to 100 preset

frequency

channels

Settings

Set the transmitter operational

settings

Ref Freq

Adjust the

transmitter

reference

frequency

Initiate a BIT

test and view

Band Edges

Set up the

transmitter

band edges

Menu Lock Screen

(see page 8)

BIT

results

S/W Config

transmitter

configuration

Mode and

Mode

Settings

Select Mode

View the software

Standby

Enter or Exit

standby mode

Polarities

Set the active

polarity for

certain hardwire

connections

AM-Voice Mode

Settings

(see page 16)

AM-MSK Mode

Settings

(see page 18)

Digital Modes (see page 19)

Menu System

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Menu Lock Screen

A security facility available only from the VFP allows the transmitter's 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 T Y M E S S A G E

F r o n t 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. T he following screen is displayed:

Change the transmitter’s operating freq uency.

Store or recall preset channel frequencies. Select operating mode and m ode settings.

Initiate a BIT test and view results.

View software configuration.

Enter or exit standby mode.

F r e q u e n c y C h a n n e l S e t t i n g s E x i t > >

B I T S / W C o n f i g S t a n d b y E x i t < <

T6T VHF 50 W Transmitter Page 8 Operation

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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, a nd g ive guidance on the optimum li ne 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 opera ting frequency of the transmitter and 8 .33 kHz channel spac ing 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)

1 18.0000 MHz 1 18.0000 MHz 1 18.0083 MHz 1 18.0166 MHz

1 18.0250 MHz 1 18.0250 MHz 1 18.0333 MHz 1 18.0416 MHz

1 18.0500 MHz 1 18.0500 MHz 1 18.0583 MHz 1 18.0666 MHz

1 18.0750 MHz 1 18.0750 MHz 1 18.0833 MHz 1 18.0916 MHz

1 18.1000 MHz 1 18.1000 MHz 1 18.1083 MHz 1 18.11 66 MHz

Channel Spacing Displayed Frequency

25 kHz

8.33 kHz

8.33 kHz 25 kHz

8.33 kHz

25 kHz

8.33 kHz

25 kHz

8.33 kHz

25 kHz

8.33 kHz

at Transm itter's Front Panel

118.000 MHz

118.005 MHz

118.010 MHz

118.015 MHz

118.025 MHz

118.030 MHz

118.035 MHz

118.040 MHz

118.050 MHz

118.055 MHz

118.060 MHz

118.065 MHz

118.075 MHz

118.080 MHz

118.085 MHz

118.090 MHz

118.100 MHz

118.105 MHz 1 18.1 10 M H z 1 18.1 15 M H z

1 18.1250 MHz 1 18.1250 MHz 1 18.1333 MHz 1 18.1416 MHz

25 kHz

8.33 kHz

118.125 MHz

118.130 MHz

118.135 MHz

118.140 MHz

Line Level Settings

The input line level setting displayed on the front panel is equivalent to the a verage s peech 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 VOG AD and mute t hresholds are pre-set 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.

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Table 4 Relationship Between Line Level, VOGAD Threshold and Mute Threshold

Line Level Setting

(dBm)

+10 +10 +20 0 -5 +5 +5 +15 -5 -10 00+10-10-15

-5 -5 +5 -15 -20

-10 -10 0 -20 -25

-15 -15 -5 -25 -30

-20 -20 -10 -30 -35

-25 -25 -15 -35 -40

-30 -30 -20 -40 -45

Average Speech

Level (dBm)

Sine Wave Level

(dBm)

VOGAD Threshold

(dBm)

Mute Threshold

(dBm)

Changing the Transmitter’s Operating Frequency

The transmitter’s frequency can be changed in two ways: either from the frequency screen, or by recalling a preset channel. This procedure details using the Frequency screen.

(1) From the Control screen, select

frequency to display the Frequency screen.

F r e q 1 1 8 . 0 0 0 M H z

(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 sw itch.

(4) Repeat until the required freq uency is

shown, then highlight OK and press the switch.

(5) Only frequencies that fa ll between the

band edge settings can be selected.

C a n c e l O K

T6T VHF 50 W Transmitter Page 10 Operation

To Store and Recall Frequency Channels

Up to 100 frequency channels can be stored in the transmitter.

To store a Channel Frequency

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(1) 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.

(2) 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.

(3) Highlight the kHz frequency value (see

Example 3), press the swi tch and then turn it until the required kHz value is shown. Press the switch.

(4) Highlight Store and press the switch.

The new frequency is now stored in the selected channel number.

To recall a Stored Frequency Channel

(1) From the Control screen, select

Channel to display the Channel screen.

(2) 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.

(3) Turn the switch to highlight Recall, then

press the switch. Exit the screen. The transmitter now operates on the recalled channel frequency.

C h 1 0 0 F r e q 1 2 1 . 5 0 0 M H z R e c a l l B a c k E x i t

Channel Screen - Example 1

C h 1 0 0 F r e q 1 1 8 . 0 0 0 M H z S t o r e B a c k E x i t

Channel Screen - Example 2

C h 1 0 0 F r e q 1 1 8 . 0 0 0 M H z O u t s i d e B a n d E d g e B a c k E x i t

Channel Screen - Example 3

C h 1 0 0 F r e q 1 1 8 . 0 0 0 M H z

I nn v a l i d f o r M o d e

B a c k E x i t

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 Ch annel Screen - Example 4) is displayed.

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To Initiate a BIT Test

Use the following procedure to initiate an interruptive BIT test from the transmitter's 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 Sc reen on page 24). An i nterruptive BIT t est cannot be initiated in Mode 2 or Mode 3.

During an interruptive BIT te st, the t ransm itter radiates m odulated carrier waves at the s et 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) From the Main screen, press the switch to display the Control screen. Turn the switch until BIT

is highlighted. Press the switch.

B I T S / W C o n f i g S t a n d b y E x i t < <

(2) Ensure the BIT me nu is displayed. Turn the switch u ntil BIT Initiate is highlighted. Press the

switch.

B I T I n i t i a t e E T I 0 0 0 0 0 : 0 0 h r s A C S u p p l y O N E x i t > >

(3) During the test, which takes approximately two seconds, the Testing screen is displayed.

T e s t i n g

P l e a s e W a i t

T6T VHF 50 W Transmitter Page 12 Operation

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(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 t 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 t S t a t u s

F A I L

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 pow er saving feature that can be used for non-operat ional 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.

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.

E n t e r S t a n d b y ?

Y e s N o

E x i t S t a n d b y ?

Y e s N o

T6T VHF 50 W Transmitter Page 13 Operation

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Settings

Operational settings for the T6T 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, ref erence frequency and backlight are set from this screen. W hen mode settings, polarities and band edges are selected the user is taken to other screens.

M o d e A M V o i c e M o d e S e t t i n g s P o l a r i t i e s E x i t > >

B a n d E d g e s R e f F r e q 5 0 . 0 % B a c k l i g h t 0 3 0 s E x i t < < > >

B a c k E x i t

Notes:

Select between AM-Voice, AM-MSK, Mod e 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 ban d edges. Align the transmitter’s reference frequency (Note 1). Adjust the LCD’s backlight time out (Note 2).

1.Setting the transmitter’s 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’s backlight can be s et for permanent ly on, off, or timed t o stay on for a pe riod between 15 and 120 seconds.

General and mode specific settings, showing default values, are referenced in Table 5 on page 15. Click on any required parameter by page number for further references.

T6T VHF 50 W Transmitter Page 14 Operation

Table 5 Ope rat io nal Settings from t he Front Panel

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Parameter Mode Adjustment Range Factory Default Setting Further

Menu lock screen All Locked or unlocked Unlocked page 8 Enter standby

mode Exit standby mode All Yes or No - page 13 Set mode of

operation Set polarities AM-voice,

Band edges All 118.000 to 136.975 MHz

LCD Backlight All 15 to 120 s, On or Off 30 s page 14 RF power All 5 to 50 W 50 W page 16 Audio line in level AM-voice,

Inhibit AM-voice,

PTT (key) AM-voice,

Tx time out AM-voice,

Modulation depth AM-voice,

Mute AM-voice O n or Off On page 16 VOGAD AM-voice O n or Off On page 16 Antenna C/O delay AM-voice

All Yes or No -

All AM-voice, AM-MSK, Mode

2 or Mode 3 STD or INV STD page 20

AM-MSK

or 1 12.000 to 155.975 MHz

-30 to +10 dBm -13 dBm page 16 and

AM-MSK

On or Off Off page 16 and

AM-MSK

On (key), Off (de-key) Off page 16 and

AM-MSK

2 to 510 s or Off 180 s page 16 and

AM-MSK

5 to 95% 85% page 16 and

AM-MSK

On or Off On

AM-voice page 14

118.000 and 136.975 MHz or

112.000 and 155.975 MHz

Reference

page 13

page 28

page 18

page 16

AM-MSK

Offset AM-voice 0, ±2.5, ±5, ±7.3, ±7.5 kHz

(additionall y, ± 4 and

±8 kHz on HS models) Ste p AM-voice 8.33 kHz, 25 kHz or both 25 kHz page 17 Mic AM-voice Active or Passive Passive page 17 Key priority AM-voice,

AM-MSK

Local PTT AM-voice,

AM-MSK

Remote PTT AM-voice,

AM-MSK

Remote phantom PTT

T6T VHF 50 W Transmitter Page 15 Operation

AM-voice, AM-MSK

Local-Remote or

Remote-Local

Enabled or Disabled Enabled page 17 and

Off 0 (No offset) page 17

Local-Remote page 17 and

page 18

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AM Voice S ettings 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 rem ote) ❑ 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 5 0 W L i n e I n - 1 3 d B m

I n h i b i t O F F

E x i t > >

P T T O F F T X T i m e o u t 1 8 0 s M o d D e p t h 8 5 % E x i t < < > >

RF power between 5 W to 50 W. Audio line in level between -30 to +10 dBm. On or Off.

On (key), Off (de-key). 2 to 510 s. 5 to 95%.

M u t e O N V O G A D O N A n t C / O D e l O N

On or Off. On or Off. On or Off.

E x i t < < > >

T6T VHF 50 W Transmitter Page 16 Operation

Adjustments

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O f f s e t 0 . 0 k H z S t e p 2 5 k H z M i c P A S S I V E E x i t < < > >

K e y P r i o r i t y L - R L o c a l P T T E N R e m o t e P T T E N E x i t < < > >

R e m P h a n P T T E N B a c k E x i t < <

0, ±2.5, ±5, ±7.3, ±7.5 , (or ±4, ±8 HS only) kHz. 25 kHz, 8.33 kHz or both. Active or Passiv e.

Local-remote or Remote-local. Enabled or Disabled. Enabled or Disabled.

Enabled or Disabled. Return to screen.

T6T VHF 50 W Transmitter Page 17 Operation

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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 rem ote) ❑ Enable or disable remote PTT ❑ Enable or disable remote phantom PTT.

AM-MSK Mode Sett ings 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).

P o w e r 5 0 W L i n e I n - 1 3 d B m I n h i b i t O F F E x i t > >

P T T O F F T X T i m e o u t 1 8 0 s M o d D e p t h 8 5 % E x i t < < > >

A n t C / O D e l O N K e y P r i o r i t y L - R L o c a l P T T E N E x i t < < > >

Adjustments

RF power between 5 W to 50 W. Audio line in level between -30 to +10 dBm. On or Off.

On (key), Off (de-key). 2 to 510 s. 5 to 95%.

On or Off. Local-remote or Remote-local. Enabled or Disabled.

R e m o t e P T T E N R e m P h a n P T T E N

Enabled or Disabled. Enabled or Disabled.

B a c k E x i t < <

T6T VHF 50 W Transmitter Page 18 Operation

Mode 2 Settings Screen

This is an advisory screen. Pressing OK returns the user to the Main screen.

M o d e 2 p a r a m e t e r s a r e s e t v i a t h e H L D C i n t e r f a c 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 p a r a m e t e r s a r e s e t v i a t h e T 1 / E 1 i n t e r f a c e

O K

Back to Transmitter Main Page

T6T VHF 50 W Transmitter Page 19 Operation

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Polarities Screens AM-Voice and AM-MSK

A number of remote indication and control signals can be hard-wire 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, 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

R e a d y O u t S T D E - B I T I n S T D I n h i b i t I n S T D E x i t > >

B I T S t a r t I n S T D P T T R e f + 1 4 V P T T I n S T D E x i t > >

P h a n P T T I n S T D P T T O u t S T D F a s t P T T O u t S T D E x i t < < > >

E x t V S W R I n S T D A n t C / O O u t S T D B a c k E x i t < <

Each of ten polarity settings applicable to AM-voice and AM-M SK can be set to the default STD (standard) setting or INV (inverted).

The signal conn ections are shown in T able 6 on

page 21 along with the conditions when STD or

INV is selected. The settings for the PTT Reference voltage are

also shown in Table 6.

T6T VHF 50 W Transmitter Page 20 Operation

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Table 6 AM-Voice and AM-MSK Polarity Settings

Signal Connector Polarity set to STD Polarity set to INV

Ready Out Facilit ies, pin 13 An open collector grounded

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

extern a l fault.

Inhibit In Facilities, pin 10 TTL input. 0 V inhibits

transmitter operation.

BIT Start In Facilities, pin 11 TTL input. 0 V initiates an

interruptive BIT test.

PTT In MARC, pin 4

MARC Audio, pin 6

Phantom PTT In MARC or

MARC Audio, pin 2

Active when input differs from reference by more than ±10 V. Inactive wh en input dif fers from reference by less than ±1 V. Maximum input level ±60 V with respect to reference. Input will dra w no mo re than 6 mA, requires at least 1 mA to operate.

An open collector high impedance output when t he radio is ready to transmit and no BIT faults are detected.

TTL input. 5 V indicates an external fault.

TTL input. 5 V inhibits transmitte r operation.

TTL input. 5 V initiates an interruptive BIT test.

Active when input dif fers from reference by less than ±1 V. Inactive when input dif fers from reference by more than +10 V. Maximum input level +60 V with re spec t to re fe re nce . Inp ut will draw no more than 6 mA, requires at least 1 mA to operate.

PTT Out Facilitie s, pi n 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 allo w for the antenna relay to pull-in time.

External VSWR Input

Antenna Changeover

T6T VHF 50 W Transmitter Page 21 Operation

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) befor e the start of the powe r ramp up to allow for the antenna relay pull-in time.

Common 0 V.

Grounding solid state relay. +60 to -60 V, ac or dc, 100 mA max, n/c. Activat e d 20 ms (±1 ms) before the start of the power ramp up to allow for the antenna relay to 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.

Common 0 V.

Continued >>

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Table 6 AM-Voice and AM-MSK Polarity Settings (Continued)

Signal Connector Polarity set to STD Polarity set to INV

Fast PTT Output (antenna changeover)

PTT Re f

MARC Audio, pin 3 Open collector NPN transistor

grounding out put, 200 mA m ax, n/o).

PTT Ref can be set to +14 V, 0 V or -14 V. PTT state is:

+14 V Ref. key ≤+4 V ≥+24 V unkey +13 to +15 V

0 V Ref. key ≤-10 V ≥+10 V unkey -1 V to +1 V

-14 V Ref. key ≤-24 V ≥-4 V unkey -13 to -15 V

Maximum input level ±60 V with respect to reference. Input will dra w no mo re than 6 mA, and requires at least 1 mA to operate.

Open collector NPN transistor grounding out put, 200 mA m ax, n/c.

PTT Ref can be set to +14 V, 0 V or -14 V. PTT state is:

+14 V Ref. unkey ≤+4 V ≥+24 V key +13 to +15 V

0 V Ref. unkey ≤-10 V ≥+10 V key -1 V to +1 V

-14 V Ref. unkey ≤-24 V ≥-4 V key -13 to -15 V

Maximum input level ±60 V with re spec t to re fe re nce . Inp ut will draw no more than 6 mA, and requires at least 1 mA to operate.

T6T VHF 50 W Transmitter Page 22 Operation

Mode 2 and Mode 3 Polarity Settings

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R e a d y O u t S T D E - B I T I n S T D E x t V S W R I n S T D E x i t > >

Each of the three polarity settings applicable to Mode 2 and Mode 3 can be set to the default STD (standard) setting or INV (inverted).

The signal connections are shown in Table 7 along with the conditions when STD or INV is selected.

B a c k E x i t

< <

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 t he radi o is rea dy to transmit and no BIT faul ts are detected.

An open collecto r hi gh impedance output when t he 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.

External VSWR Input

Facilities, pin 4 TTL input. 0 V active. TTL input. 5 V active.

TTL input. 5 V indicates an external fault.

T6T VHF 50 W Transmitter Page 23 Operation

AM-Voice and AM-MSK BIT Screen

The AM-voice and AM-MSK BIT screen is accessed from the Control screen.

Back to Transmitter Main Page

B I T I n i t i a t e E T I 0 0 0 0 0 : 0 0 h r s A C S u p p l y O N E x i t > >

D C S u p p l y O N S u p p l y 2 8 V S y n t h L o c k P A S S E x i t < < > >

P A T e m p 5 0 d e g C P A C o o l i n g P A S S B a s e b a n d P A S S E x i t < < > >

R F D r i v e P A S S P A O u t p u t P A S S P A L o o p P A S S E x i t < < > >

Select to in it ia t e B IT test. Shows elapsed time 0:00 to 99999:59 (Hrs:Min). Shows state of ac supply (On or Off).

Shows state of dc supply (On or Off). dc supply 0 to 40 V, <21.6 V Alert, <19 V Alarm. Pass or Fail (Out-of-Lock).

PA temperature -20°C to +150°C. Pass or Fail. Pass, Fail or Not Tested.

Pass, Fail or Not Tested. Pass, Fail or Not Tested. Pass, Fail or Not Tested.

M o d D e p t h P A S S R F F i l t e r s P A S S V S W R P A S S E x i t < < > >

L o o p E r r o r P A S S A u d i o I n P A S S D S P 1 P A S S E x i t < < > >

T6T VHF 50 W Transmitter Page 24 Operation

Pass, Fail or Not Tested. Pass, Fail or Not Tested. Pass, Fail or Not Tested.

Pass or Fail. Pass, Fail or Not Tested. Pass or Fail.

Back to Transmitter Main Page

D S P 2 P A S S X i l i n x 1 P A S S X i l i n x 2 P A S S E x i t < < > >

E E P R O M P A S S S t a r t U p P A S S C a l i b r a t i o n P A S S E x i t < < > >

U n k e y e d P w r P A S S E - B I T P A S S M A R C A C T I V E E x i t < < > >

H D L C I N A C T I V E T 1 / E 1 I N A C T I V E B a c k E x i t < <

Pass or Fail. Pass or Fail. Pass or Fail.

Pass or Fail. Pass or Fail. Active or Inactive.

Active or Inactive. Active or Inactive.

T6T VHF 50 W Transmitter Page 25 Operation

Mode 2 and Mode 3 BIT Screen

The Mode 2 and Mode 3 BIT screen is accessed from the Control screen.

Back to Transmitter Main Page

E T I 0 0 0 0 0 : 0 0 h r s A C S u p p l y O N D C S u p p l y O N E x i t > >

S u p p l y 2 8 V S y n t h L o c k P A S S P A T e m p 5 0 d e g C E x i t < < > >

P A C o o l i n g P A S S V S W R P A S S L o o p E r r o r P A S S E x i t < < > >

D S P 1 P A S S D S P 2 P A S S X i l i n x 1 P A S S E x i t < < > >

Shows elapsed time 0:00 to 99999:59 (Hrs:Min). Shows state of ac supply (On or Off). Shows state of dc supply (On or Off).

Shows value of dc supply. Synth lock (Pass or Fail). Indicates the PA temperature.

Pass or Fail. Pass, Fail or Not Tested. Pass or Fail.

Pass or Fail. Pass or Fail. Pass or Fail.

X i l i n x 2 P A S S E E P R O M P A S S S t a r t U p P A S S E x i t < < > >

C a l i b r a t i o n P A S S E - B I T P A S S M A R C A C T I V E E x i t < < > >

H D L C I N A C T I V E T 1 / E 1 I N A C T I V E B a c k E x i t < <

T6T VHF 50 W Transmitter Page 26 Operation

Pass or Fail. Pass or Fail. Pass or Fail.

Pass or Fail. Pass or Fail. Active or Inacti ve .

Active or Inactive. Active or Inactive.

Software Configuration Screens

Software configuration screens are as follows:

Back to Transmitter Main Page

T 6 V H F 5 0 W T X 1 1 8 - 1 3 6 . 9 7 5 M H z H i g h S t a b i l i t y E x i t > >

B o o t S o f t w a r e 6 5 - x x x x x x x x / v v

E x i t < < > >

B a s e S o f t w a r e 6 5 - x x x x x x x x / v v

E x i t < < > >

M o d e S o f t w a r e 6 5 - x x x x x x x x / v v

E x i t < < > >

Second line variation for WB radios reads 112-155.975 MHz. Third line variation for WB radios is blank.

65-xxxxxxxx represents the software part number and /v v represents its version.

Current mode running. 65-xxxxxxxx represents the software part number and /v v represents its version.

F i l l 1 S o f t w a r e 6 5 - x x x x x x x x / v v [ D e s c r i p t i o n ] E x i t < < > >

F i l l 2 S o f t w a r e 6 5 - x x x x x x x x / v v [ D e s c r i p t i o n ] E x i t < < > >

T6T VHF 50 W Transmitter Page 27 Operation

65-xxxxxxxx represents the software part number and /v v represents its version.

Back to Transmitter Main Page

F i l l 3 S o f t w a r e 6 5 - x x x x x x x x / v v [ D e s c r i p t i o n ]

F i l l 4 S o f t w a r e 6 5 - x x x x x x x x / v v [ D e s c r i p t i o n ]

65-xxxxxxxx re presents the soft ware part number and /v v represents its version.

65-xxxxxxxx r epresents the so ftware part number and /v v represents its version.

Band Edges

The frequency range of the transmitter is 118 to 136.975 MHz for the B6350/NB version, or 112 to

155.975 MHz for the B6350/WB version. 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 frequencies between BE3 and BE4.

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 t > >

The Band Edge screen is accessed from the Control screen.

Band edge frequencies can be set only in increments of 25 k Hz.

If the transmitter is required to ope rate over the full range, the band edge parameters must be set

B E 4 1 3 6 . 9 7 5 M H z

to the lowest and highest values in the range (see

Table 8).

E x i t < <

Table 8 Band Edge Values

B6350/NB set so that oper ation is over the full frequency range.

B6350/WB set so that operation is over the full frequency range.

Example: Transmitter set to transmi t onl y those frequencies in the range 120 to 130 MHz.

Example: Transmitter set to transmi t onl y those frequencies in the ranges 120 to 125 MHz and 130 to 135 MHz.

BE1 BE2 BE3 BE4

118.000 136.975 118.000 136.975

112.000 155.975 112.000 155.975

120.000 130.000 120.000 130.000

120.000 125.000 130.000 135.000

T6T VHF 50 W Transmitter Page 28 Operation

Back to Transmitter 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 l y 2 1 V

A L E R T R F P o w e r R e d u c e d L o o p E r r o r S u p p l y 2 1 V

A L E R T R F P o w e r R e d u c e d P A T e m p 8 5 d e g C

A L A R M R F P o w e r R e d u c e d V S W R F A I L

No RF power reduction

Alarm indicator flashing

RF power reduced between 1 and 3 dB

Alarm indicator flashing

RF power reduced between 1 and 3 dB

Alarm indicator flashing

RF power reduced by more than 3 dB

Alarm indicator on

A L A R M R F P o w e r R e m o v e d L o o p E r r o r F A I L S u p p l y 1 8 V

A L A R M R F P o w e r R e m o v e d P A T e m p 9 5 d e g C

T6T VHF 50 W Transmitter Page 29 Operation

RF power shut down

Alarm indicator on

RF power shut down

Alarm indicator on

Table 9 Functions and Parameters

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Function Front

FREQUENCY

Change frequency

FREQUENCY CHANNELS

Store/Recall preset frequency channels

SETTINGS

Set modulation mode

Radio Settings (AM Modes):

Set RF output power

Set audio input line level

Set inhibit on or off

Panel

✔✔✔ ✔ ✔✔ 118.000 MHz

✔✔✔ ✔ ✗ ✗

✔✔✔ ✔ ✔✔

✔✔✔ ✗ ✔✗

✔✔✔ ✗ ✗ ✗ Off

VFP MARC T6

Controller

T1/E1 HDLC Default Setting

AM-Voice

50 W

-13 dBm

PTT test fa c ili ty on (key), off (dekey)

Set Tx time out

Set modulation depth

Set mute on or off (AM-Voice only)

Set VOGAD on or off (AM-Voice only)

Set antenna C/O delay on or off

Set frequency of fset (AM-Voice only)

Set frequency step size (AM-Voice only)

✔✔

View state

✗✔✗

Off

✔✔✔ ✗ ✔✗ 180 s

✔✔✔ ✔ ✔✗

✔✔✔ ✗ ✗ ✗

✔✔✗ ✗ ✗✗

85%

AM-V oice - On

AM-MSK - Off

0 (No offset)

25 kHz

Continued >>

T6T VHF 50 W Transmitter Page 30 Operation

Table 9 Func t i ons and Paramet ers (Continued)

Back to Transmitter Main Page

Function Front

Set microphone type (active or pass ive) (AM-V o ice only)

Set keying priority (local or remote)

Enable or disable local PTT

Enable or disable remote PTT

Enable or disable remote phantom PTT

Radio Settings (Digital Modes):

MAC TM1 (inter access delay)

MAC TM2 (channel busy)

Panel

✔✔✗ ✗ ✗✗

✔✔✗ ✗ ✗✗ Local-Remote

✔✔✗ ✗ ✗✗

✔✔✗ ✗ ✗✗ Enabled

✔✔✗ ✗ ✗✗

✗✔✗ ✗ ✗✔

VFP MARC T6

Controller

T1/E1 HDLC Default Setting

Passive

Enabled

2.5 ms

60 s

MAC p (persistance)

MAC M1 (maximum number of access attempts)

Scramble vector

Tx enable ✗✔✗ ✗ ✗✔ On

Polarities:

Ready out

Set PTT input polarity (AM modes only)

Set phantom PTT input polarity (AM modes only)

✗✔✗ ✗ ✗✔

✔✔

View

state

View state

✗✗✗

✗✗✗ STD

13/256

135

4D4B

19787

STD

Continued >>

T6T VHF 50 W Transmitter Page 31 Operation

Table 9 Func t i ons and Paramet ers (Continued)

Back to Transmitter Main Page

Function Front

Set PTT reference voltage (AM modes only)

Set PTT output polarity (AM modes only)

Set fas t PTT antenna changeover output polarity (AM modes only)

Set antenna changeover output polarity (AM modes only)

Set external VSWR input polarity (All mod es)

Set inhibit input polarity (AM modes only)

Panel

VFP MARC T6

✔✔

View state

Controller

T1/E1 HDLC Default Setting

✗✗✗ +14 V

✗✗✗

✗✗✗ STD

STD

BIT interruptive test input polarity (AM modes only)

E-bit input polarity (All mod es)

Band Edges:

Set band edges

Reference Frequency:

Adjust transmi tte r’s reference frequency

LCD Backlight:

Adjust LCD backlight

✔✔

View state

✗✗✗

✔✔✗ ✗ ✗✗

STD (active low)

1 18.000 and 136.975 MHz

1 12.000 and 155.975 MHz

30 s

Continued >>

T6T VHF 50 W Transmitter Page 32 Operation

Table 9 Func t i ons and Paramet ers (Continued)

Back to Transmitter Main Page

Function Front

BIT

Initiate BIT interruptive test

STANDBY

Enter and exit standby facil ity

SOFTWARE CONFIGURATION

View the transmitter’s software configuration

LOCK FACILITIES

Front panel lock

MARC lock

T1/E1 lock

Panel

✔✔✔ ✔ ✗ ✗

✔✔✗ ✗ ✔✔

✗✔✗ ✗ ✗✗

VFP MARC T6

Controller

T1/E1 HDLC Default Setting

Not in Standby

Off

HDLC lock

End of Document

✗✔✗ ✗ ✗✗

Off

T6T VHF 50 W Transmitter Page 33 Operation

Installation

Back to Transmitter Main Page

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Warnings and Cautions

WARNING Dangerous Voltages

The instructions given in this section involve connecting dangerous voltages to the transmitter. The instruction s d etailed i n th is do cument must be ca rri ed ou t on ly by suitab ly qual i fied personnel.

WARNING Dangerous Voltages

The equipment is permane ntly con nec ted to the m ains s upp ly wh en the m ains co nn ector is attached. Switching the rea r panel Power sw itch to off does not is olate all internal circu its from the mains supply. For this reason, a mains isolating swi tch 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

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 perso nne l.

Caution

The T6T transmitter's circ uitry co ntai ns Ele ctrostatic S en si tive Devi ces (ESSDs). Personnel must be aware of the precautions nec essary 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, o r parties authorized by P ark Air, could void th e user’s authority to op erate the equipment.

Antenna Radiation

ESSDs

T6T VHF 50 W Transmitter Page 2 Installation

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Introduction

The procedures necessary to install a transmitter are listed in Table 1.

Table 1 Installation Procedures

Procedure Reference

1 Read and understand the warnings and cautions given on page 2. 2 Perform an initial i nspection of the transmitter and fit t he correct ac input fuse. page 9 3 Fit the transmitter into an equipment cabinet. page 9 4 Make external signal connec ti ons. See Fig 1 to Fig 5 to determine which

external connections are required for the particular conf iguration. 5 Connect the chassis stud to the cabinet or system earth. page 22 6 Connect the antenna. page 22 7 Connect the dc input supply (if r equired). page 22 8 Connect the ac input supply (if r equired). page 23

page 10

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 T ype Park Air Part Number

Fuses:

AC input fuse, F2, for 110/120 V input AC input fuse, F2, for 220/230 V input

DC input fuse 15A size 0 29-01350201

Connectors:

AC supply connector IEC 20-02030102

T4A, 125V, UL T4A, 250V, IEC

29C11120102S 29E01120108S

DC supply connector XLR3 socket 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 pl ug 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

T6T VHF 50 W Transmitter Page 3 Installation

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Configuration

Connection of external equipment depends on the configuration required. Possible configura tions 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

Unregulated supply output

Inhibit input

BIT interruptive test input

Antenna changeover output

Ready output

Tape output

Facilities Connector

Frequency Counter

required only for

maintenance

Reference Connector

Antenna

Connector

Microphone/Diagnostics

Connector

Mic/Headset for

local operation

Laptop (or PC) required

only for maintenance

For local oper ati on, the transmitter is operated from the front panel using a m icrophone/headset . Any of the optiona l fa cilities may be connected.

Fig 1 T6T Transmitter Configured for Local Operation

T6T VHF 50 W Transmitter Page 4 Installation

T6T Transmitt e r

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Unregul ate d su pp ly

RS422 Data

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 in pu t

Antenna changeover output

Read y output

Tape output

Audio

PTT

MARC Connector or, MARC Data and MARC Audio Connectors

Facilities Connector

Frequency Counter

required only for

maintenance

Reference Connector

Antenna

Connector

Microphone/Diagnostics

Connector

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, o r alt ernati vely on the M ARC Audio conn ector. If d ata is requi red by a compat ible dat a syste m, the RS422 data lines termi nate on the MARC connector, or alternatively on the MARC Data connecto r. Any of the optional facilities may be connect ed.

Fig 2 T6T Transmitter Configured for Remote Operation

T6T VHF 50 W Transmitter Page 5 Installation

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RSE2

Equipment Connector

Optional Fa c ilities that

can be used if required

PTT relay out put

External VSWR input

Unregulated supply output

BIT interruptive test input

Antenna changeover output

Unregulated supp ly

RS422 data

E-BIT input

Inhibit input

Ready output

Tape output

Audio

PTT

Freque nc y Counter

required only for

maintenance

MARC Connector

Facilities Connector

Reference Connector

T6T Tra nsmitt e r

Antenna

Connector

Microphone/Diagnostics

Connector

Mic/Headset for engineering use

Laptop (or PC) r equired

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 connect ed.

Fig 3 T6T Transmitter Configured for use with MARC

T6T VHF 50 W Transmitter Page 6 Installation

T6T Tra ns m itter

Reference Connector

Microphone/Diagnostics Connector

Antenna

Connector

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Mode 2

Network Computer

Reference connector

Control and data

T6R Receiver

Reference Connector

Headset/Diagnostics Connector

Connects to the

HDLC

Connector

T1/E1

Connector

Control and data. 2 km maximum distance

T1/E1

Connector

Facilities

Connector

Antenna c/o control

Connector

Antenna

Fast Antenna Change-Over

Switch

Frequency Counter

Connects to the

Microphone/Diagnostics

connector

Laptop (or PC) required

only for maintenance

required only for

maintenance

Fig 4 T6T Transm i t t er Mode 2 Config ura tion

T6T VHF 50 W Transmitter Page 7 Installation

T6T Transmitter

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Antenna

Connector

Mode 3

Network Computer

T1/E1

Connector

Control and data

Frequency Counter

required only for

maintenance

Reference Connector

Microphone/Diagnostics Connector

Fig 5 T6T Transm i tter Mode 3 Confi guration

Laptop (or PC) required

only for maintenance

T6T VHF 50 W Transmitter Page 8 Installation

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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 Guide CD (part numbe r 31-36T62VCD) is normally supp lied with the transm itter. This CD includes the VFP software.

Fitting the Corre ct AC Input Fuse

The mains input fuse F2 is an integral part of the rear panel ac connector. 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, fuse

Neutral

Holder for spare fuse (not supplied)

FS2 Spare Fuse

F2 should be rated T4A, 125V, UL.

For a mains input in the range 110 to 240 Vac, fuse F2 should be rated T4A, 250V, IEC.

Fitting a Radio into an Equipment Cabinet

Caution Mechanical Support

It is essential that the chose n mechan ical installation provides a dequate s upport 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 inst alled on telescopic slides, or on fixed runners, within a standard 4 83 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 th e cabinet, the t ransmitter's front panel m ust be secured to the c abinet’s chas sis using four M6 x 16 mm screws and plastic washers.

T6T VHF 50 W Transmitter Page 9 Installation

Front Panel

29.0

41.7

47.0

152.8

207.5

232.2

430

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88.9

378.2

390.9 399

450

All measurements in mm

Fig 6 Sli de Fitti ngs

Make External Signal Connections

Making the external signal connect ions invol ves configu ring th e transmitter to s uit its operational mo de. 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 50 W Transmitter Page 10 Installation

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Microp ho ne / D i agnostics Connector

The Microphone/Diagnostics connector is a self-locking 7-way DIN socket used for connecting a microphone, microphon e/heads et 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 cha ssis mounted socket.

A suitable free socket is detailed in Table 2 on page 3.

Table 3 Microphone/Diagnostics Connector

Pin Number Signal Characteristic Usage

1 Microphone gr ound 0 V Microphone/Headset 2 Transmit data RS232. 115200 baud, 8 data bits, 1 stop bit,

no parity, no handshaking. 3 Microphone PTT 0 V to PTT. Microphone/Headset 4 Receive dat a RS232. 115200 baud, 8 data bits, 1 stop bit,

no parity, no handshaking. 5 Sidetone – Microphone/Headset 6 Microphone i nput To ensure corr ect VOGAD operation, the fol-

lowing microphone input levels are required:

Passive setting: between 2 and 35 mV

Active setting: bet ween 8and 140 mV. 7 Ground 0 V PC

Microphone/Headset

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 50 W Transmitter Page 11 Installation

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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 IEC Terminating the ac inp ut supply. DC Supply 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 sideto ne. MARC 9-way D-type Used to connect to a MARC remote site equipment.

Used to connect a T6 contro ll er or hub. Used to terminate rem ote audio and PTT signals when a remote site equipment or T6 controller is not used.

MARC Audio RJ48 Used as an alternat ive to the MARC conne ctor fo r terminati ng

remote audio and PTT signals.

MARC Data RJ48 Used as an alternative to the MARC conne ctor fo r terminati ng

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 f or connecting to a digital voice and data network.

HLDC RJ48 Used to connect to a Mode 2 network compute r.

ANTENNA

DANGER HIGH

RF VOLTAGES

CONNECT ANTENNA

BEFORE

USE

T1/E1 HDLC

MARC

DATA

MARC AUDIO

MARC FACILITIES

RATINGS

AC SUP PLY

48 - 62Hz

~ 110 - 240V ( +10%) 4A

POWER 400VA max

DC SUPPLY

21.6 - 32V 10A

SEE INSTALLATION INSTRUCTIONS BEFORE

CONNECTING SUPPLIES

DISCONNECT SUPPLIES WHEN NOT IN USE

FUSE F2

110-240V T4A 250V IEC 110V - 120V T4A 125V UL

FUSE F1

F15A 32V

SUPPLY

FUSE F2

FUSE F1

AC SUPPLY

DC SUPPLY

Fig 8 Rear Pan el (C onnectors)

T6T VHF 50 W Transmitter Page 12 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 usin g this connec tor, the RJ 48 st yle M ARC A udio and M A RC 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 connecto r looking in to the mati ng face of the chassis mounted socket.

A suitable free socket is det ailed in Table 2 on page 3.

Table 5 MARC Connector

Pin Number Signal Characteristic

1 Ground 0 V 2

3 4 PTT input

5 Output supply This output is between 21.6 and 32Vdc (nom inally

6 7

Audio line in (+)

Audio line in (-)

Data in (+) Data In (-)

Data Out (+)

Data Out (-)

Balanced 600 ohm, -20 to +20 dBm.

Phantom keying can be superimposed on the audio lines. See Fig 10.

Remote PTT signal i nput. See Fig 9.

28 V) fused at 500 mA. RS422 differential asynchronous data at 9600 baud,

8 data bits, 1 stop bit, no parity , no handshaking.

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 setti ng. See the informatio n supplied under the heading ‘Line Level Settings’ in Operation.

T6T VHF 50 W Transmitter Page 13 Installation

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MARC Audio Connector

The MARC Audio co nnector is an 8-way RJ48 socket. It can be us ed 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.

RJ48 Plug

Pin 1

The top is being viewed when the lever is on the bottom.

Table 6 MARC Audio Connector

Pin Number Signal Characteristic

3 Fast antenna

4 Not used -

5 Not used -

6 PTT (input) Remote PTT signal input. See Fig 9. 7 Ground 0 V.

8 Not used -

Audio line in (input)

Audio line in + (input)

changeover/PTT (output)

Balanced 600 ohm, -20 to +20 dBm.

Phantom keying can be superi m posed on the audio lines. See Fig 10.

Open collector NPN transi stor grounding output, 200 mA max, configurable n/o or n/ c).

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 Settings’ in Operation.

T6T VHF 50 W Transmitter Page 14 Installation

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MARC or MARC Audio Connector

Control Equipment

Audio

Cross-Site Lines

Audio line 1

Circuit

Audio line 2

PTT

PTT input requires at least 1 mA to operate.

PTT Switch

PTT

Input will draw no more than 6 mA.

The transmitter reference voltage (0 V, +14 V or -14 V) is selected from the Polarities screen.

❑ PTT is active when V ❑ PTT is inactive when V ❑ Maximum value of V

differs from the transmitter reference voltage by more than ±10 V.

PTT

differs from the transmitter reference voltage by less than ±1 V.

PTT

is ±60 V with respect to transmitter reference voltage.

PTT

Example: To use 0 V as the keyin g potential, V

= 0 V; set transmitter reference voltage to +14 V; set PTT In to STD.

PTT

T6T Transmit te r

MARC Audio Connector

audio is pins 1 and 2 PTT is pin 6 ground is pin 7.

MARC Connector

audio is pins 2 and 3 PTT is pin 4 ground is pin 1.

Reference Voltage

(0 V, +14 V or -14 V)

Set from front panel

Fig 9 Remote Keying

MARC or

Control Equipment

Audio Circuit

PTT Switch

Audio lines with phantom keying

signal superimposed

PTT

MARC Audio Connector

PTT input requires at least 1 mA to operate. Input will draw no more than 6 mA.

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 (V

) superimposed on the audio lines inst ead of using a separate line.

PTT

The transmitter reference voltage (0 V, +14 V or -14 V) is selected from the Polarities screen.

❑ PTT is ac tive when V ❑ PTT is inactive when V ❑ Maximum value of V

differs from the transmitter reference voltage by more than ±10 V.

PTT

differs from the transmitter reference voltage by less than ±1 V.

PTT

is ±60 V with respect to transmitter reference voltage.

PTT

Example: To use 0 V as the keying potential, V

= 0 V; set transmitter reference voltage to +14 V; set PTT In to STD.

PTT

T6T Tr a nsmitter

MARC Audio Connector: Audio is pins 1 and 2

MARC Connector: Audio is pins 2 and 3

Reference Voltage

(0 V, +14 V or -14 V)

Set from front panel

Fig 10 Phantom Keying

T6T VHF 50 W Transmitter Page 15 Installation

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MARC Data Connector

The MARC Data conne ctor 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.

RJ48 Plug

Pin 1

The top is being viewed when the lever is on the bottom.

Table 7 MARC RJ48 Data Connector

Pin Number Signal Characteristic

1 2

3 Not connected -

4 5

6 Remote Supply ON/OFF 0 V to switch off.

7 Ground 0 V. 8 Output suppl y This output is between 21.6 and 32 Vdc (nominally

Data in (-) Data in (+)

Data out (+) Data out (-)

RS422 differen ti al asynchronous data, 9600 baud, 8 data bits, 1 stop bit, no parity, no handshaking.

Note: Rear panel switc h must be in ON position for this function to oper ate.

28 V) fused at 500 mA.

T6T VHF 50 W Transmitter Page 16 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.

RJ48 Plug

Pin 1

The top is being viewed when the lever is on the bottom.

Table 8 T1/E1 Connector

Pin Signal Characteristic

1 RRing 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. 2RTip

3 Not connected -

4 TRing T1 - Balanced 100 ohm (±10%), 1.544 Mbits per second (±50 ppm), AMI/B8ZS Coding. 5TTip

6 Not connected -

7 Not connected 8 Not connected -

Protected with 28 V differential and common mode clamp and 1.25 A fuse in each line.

E1 - Balanced 120 ohm (±10 %), 2.048 Mbits pe r second (±50 ppm), AMI/HDB3 Coding.

Protected with 28 V differential and common mode clamp and 1.25 A fuse in each line.

T6T VHF 50 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.

RJ48 Plug

Pin 1

The top is being viewed when the lever is on the bottom.

Table 9 HDLC Connector

Pin Signal Characteristic

1 HDLC RX A

(input)

2 HDLC RX B

(input)

3 HDLC CL A

(output)

4 HDLC TX B

(output)

5 HDLC TX A

(output)

6 HDLC CL B

(output)

7 Ground 0 V.

8 Output supply This output is between 21.6 and 32Vdc (nominally 28 V) fused at

RS422 differential synchronous data, 128 kbytes per second (±50 ppm ).

Pair to pin 3.

500 mA.

T6T VHF 50 W Transmitter Page 18 Installation

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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 directl y to Tip.

Sleeve Ground 0 V.

T6T VHF 50 W Transmitter Page 19 Installation

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Facilities Connector

The Facilities conne ctor is a 15-way D-type filtered soc ket used for connecting to associated parts of a system. The connector pin-out is detailed in Table 11.

915

Pin-out of Facilities connector looking into the mating face of the chassis mounted socket.

A suitable free socket is det ailed in Table 2 on page 3.

Table 11 Facilities Connector

Pin Number Signal Characteristic

1 Ground 0 V.

2 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 mess age is di splayed on the di splay. The in put is TTL having a 4.7 kohm pull-up resistor to 5 V. The input is configurable from the front panel to be act ive high or low.

3 PTT output Grounding solid state relay . +60 to -60 V, ac or dc, 100 mA max,

configurab le n/o or n/c. Activated 35 ms (±1 ms ) before the s tart of the power ramp up to allow for the antenna relay pull-in time.

4 External VSWR input Used to indicate an external VSWR fault. TTL input with 4.7 kohm pul l-

up to 5 V. Configurable active high or low.

7 Not used -

8 Ground 0 V.

9 Output supply This output is between 21.6 and 32 Vdc (nominally 28 V) fused at

10 Inhibit (Input) Active signal prevents the transmitter keyi ng. TTL with 4.7 kohm pull-

11 BIT interruptive test

12 Not use d -

13 Ready (output) An output that is active when the radio is ready to transmit and no

14 Tape (output) An audio output for connection to a recording system. 0 dBm fixed

Antenna changeover (output)

Antenna changeover common (output)

(input)

Solid state rel ay linked to pin 6. See Fig 11 for further detail.

Solid state relay linked to pin 5.

500 mA.

up to 5 V. Configurable active high or low.

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.

faults are detected. Open collector NPN transistor groundin g output, 200 mA max, configu rable n/o or n/c.

output into 600 ohm for 90% mod ulation depth.

15 Reserved (output) Do not connect to pin 15 unless advised to do so by Park Air.

T6T VHF 50 W Transmitter Page 20 Installation

T6T Tr a nsmitter

(Main)

Facilities

Connector

Antenna

T6T Tr a nsmitter

(Standby)

Facilities

Connector

Solid State

Relay

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Antenna

28 Vdc (nominal)

Main/Standby

Transmit Relay

9 5

Link

Control

Antenna

Example

This example shows the Antenna Changeover 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 changeover output can be configured in other ways to suit the use r’s requirement s ubject 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 op en 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 Changeover Output

T6T VHF 50 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 equipmen t cabinet, or to the user's system earth po int. The stud must not be used as the safety earth.

In order not to compromise the transmitter’s Electromagnetic Comp atibility (EMC) the chassis stud, marked and fitte d to the rear panel (see Fig 8) 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, green-and-yellow cable having a cross-sectional area of 2.5 mm

. 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 operat es from e ither an ac, o r a dc input supply. W hen both ac and dc are connect ed, 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.

A dc input sup ply connector (see Fig 12) is fitted to the equipment's rear panel. The recommended minimum rating of the dc supply cable is: 2-core having a cross-sectional area of 1.5 mm supply cable should be fitted with an XLR 3-pin socket (Park Air part number 20-01030106).

Positive Negative

Pin-out of DC connector looking into the m a tin g f ac e of the c ha s sis mounted socket.

Not used

Fig 12 DC Connector

per core. The

T6T VHF 50 W Transmitter Page 22 Installation

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Connect the AC Input Supply

WARNING Dangerous Voltages

The equipment is perman ently connected to the mains suppl y wh en the m ai ns c onnector is attached. Switching the re ar panel Power sw itch to off does not isolate al l internal circuits from the mains su pply. For this reas on, a mains isolating switch sh ould be fitted close to, and easily accessible fro m, the transmitter's position. Th e 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.

An ac input connector is fitted to the equipment ’s rear panel. Th e cable used t o connect bet ween the equipment and the user’s ac power source should be 3-core (to IEC 227) rated 250 Vac at 8 amps, and have a minimum c ross-sectional area of 1.0 mm chloride (PVC) insulated cable. The cable must be fitted with the IEC approved equipment connector and conform to the following specification:

per core. Park Air recommends t he use of polyvinyl

❑ If PVC insulated, be not lighter than ordinary polyvin yl chloride sheathed flexible cord acc ording

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 ‘Rubbe r Insulated Cables of Ra ted Voltages up to and Including 450/750 V (designation H05 RR-F)’.

The T6T transmitter is a Class 1 equipment. The ac supply cable should have a green-and-yellow 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

Earth

Line

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

Neutral

coloured black.

❑ The core coloured brown must be connected to

the terminal that is marked with the letter L or coloured red.

Holder for spare fuse (not supplied)

FS2 Spare Fuse

T6T VHF 50 W Transmitter Page 23 Installation

Switching On

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WARNING

Dangerous Voltages

When installation is complete, the trans mitter should be switched on at the rear pane l 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.

= Standby= On

Under normal circumstances this screen is displayed for a few seconds when the radio is switched on.

T 6 D i g i t a l R a d i o ( c ) 2 0 0 3 P a r k A i r

I n i t i a l i s 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 su ccessf ully com pleted the t rans mitter must be s et up using the f ront panel conntrols or the VFP.

Setting up is detailed in the Operation section of this documentation.

When setting up the trans mitter, pay particular attention to the Polarities of any functions that have been hard-wired during installation. For example, the polarity of the PTT input and the polarity and configuration of the Antenna Changeover output. Failure to select the correct settings will result in incorrect operation.

T6T VHF 50 W Transmitter Page 24 Installation

Maintenance

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Introduction

This section gives the scheduled and unscheduled maintenance procedures for the T6T transmitter and shows how to use the Virtual Front Panel (VFP).

Scheduled Maintenance A scheduled mainten ance procedure is given on pag e 3. Park Air

recommends that this task be completed every twelve months.

Unscheduled Maintenanc e Normally, the T6 transmitter is considered a Lin e Replaceabl e 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 repai r.

In certai n cir cum stances, Park Air C 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 18.

ustomer Support may

T6T 50 W VHF Transmitter Page 2 Mai ntenance

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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

1 Ensure the equipment is clean and that external

connectors are securely fitted.

2 Check and reset (if required) the transmitter's

frequency standard.

3 Perform a BIT interruptive test. 4 Perform an ac and dc change-over check (if bot h

supplies are connect ed).

Camel hair brush/clean lint-free cloths

VHF Frequency Counter

Cleaning and Checking Security of Connectors

Remove all dust and dirt from the equipment's exterior using a lint free cloth and camel hair brush. Check all external connections are secure and free from damage.

Setting the Transmitter’s Internal Reference Frequency

To set the transmitter’s 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.

(3) From the Main screen, press the switch

to display the Control screen. Turn the switch until Settings is highlighted. Press the switch.

F r e q u e n c y C h a n n e l S e t t i n g s E x i t

Control Screen

(4) Ensure the Settings screen is

displayed. Turn the switch until Ref Freq is highlighted, then press the switch.

(5) 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.

B a n d E d g e s R e f F r e q 5 0 . 0 % B a c k l i g h t 0 3 0 s E x i t < < > >

Setti ngs Sc re e n

(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.

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(8) If not 5-carrier offset, refer to AM Voice Mode Settings Screen in the O peration 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 atte nuator, to the transmitter’s rear

panel Antenna connector (see Fig 1 for location of the Antenna connector).

❑ Refer to AM Voice Mode Settings Sc reen in the Operation section of this document and set

the desired 5-carrier offset.

❑ Refer to Changing the Transmitter’s Operating Frequency in this document and set the

transmitter to the nearest 25 kHz chann el f requency . For exam ple, if the required frequ ency 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

control, until the frequency counter disp lays the requ ired operating freque ncy. For ex ample

124.504 MHz.

❑ When the frequency count er displays t he exac t operat ing freque ncy, press the S croll/S elect

control and stop keying the transmitter.

❑ Disconnect the test equipment and reconnect the antenna.

T6T 50 W VHF Transmitter Page 4 Mai ntenance

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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 t rans m itter radiates m odul ated c arrier waves at t he s et 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 inaccurat e. Th erefore the transmitter MUST NOT be keyed during the test.

(1) From the Main screen, press the s witch to

display the Control screen. Turn the switch until BIT is highlighted. Press the switch.

(2) Ensure the BIT menu is displayed. Turn

the switch until BIT Initiate is highlighted. Press the switch.

(3) During the test, which takes approximately

two seconds, the Testing screen is displayed.

(4) After the test, either a Pass or Fail screen

is displayed. S electing OK t akes the u ser back to the BIT screen.

B I T S / W C o n f i g S t a n d b y E x i t < <

B I T I n i t i a t e E T I 0 0 0 0 0 : 0 0 h r s A C S u p p l y O N E x i t > >

T e s t i n g

P l e a s e W a i t

T e s t S t a t u s

P A S S

O K

(5) If fail is displayed, scroll through the screen

T e s t S t a t u s

to check the cause of the failure.

F A I L

O K

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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

Powe r switch is set to the I ( o n ) p o sition .

(2) Confirm that the front panel Ready indi cator is lit, the LCD is illuminated, and the tran smitter is

operational. (3) Switch off the ac supply from its source. (4) Check that the trans mitter continues to operate correctly from the d c supply. If accessed, the

front panel BIT screen will show AC S upply as off, and DC supply as o n. The value of the dc

supply is also shown.

T6T 50 W VHF Transmitter Page 6 Mai ntenance

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Unscheduled Maint enance

WARNING Dangerous Voltages

The instructions given in this document 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 swit ch is set to the S tandby pos ition, dangero us voltages a re still present in the transmitter's internal power sup ply circuitry. To ensure safe working, the ac an d dc input supplies must be disconnected from the transmitter.

WARNING

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

The T6 transmitter's ci rcuitry contains Electrostatic Sensitive De vices (ESSDs). Personnel must be aware of the precautions necessary to prevent damag e to such devic es.

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’s Electromagnetic Compatibility (EMC) and breach European Commission regulations.

Antenna Radiation

ESSDs

When screws ar e i nse rted into th e transmitter PA casting care must be taken n ot 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 module.

T6T 50 W VHF Transmitter Page 7 Mai ntenance

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Introduction

This document provides the us er with detailed instruc tions on the remov al an d replacem ent of modul es and assemblies.

(1) When removing or refitting modules, observe antistatic handling precautions. (2) Do not change any potentiometer (or link) settings unless detailed in these instructions.

Potentiometers have been set using specialist equipment. (3) 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 c onnect or by moving one side of the conne ctor 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 2Lift 1

PCB

Tools, Materials and Test Equipment Required

The following tools, materials and test equipment should be made available to complete the maintenance tasks descri b ed in thi s sec tion:

❑ Personal Computer (PC) ❑ General Purpose Tool kit (including a

1.5 mm Allen key)

❑ 5 mm Nut Spinner ❑ Camel Hair Brush ❑ Clean Lint-free Cloths

❑ Frequency Counter ❑ Power Meter ❑ Dummy Load ❑ P C to Radio Interconnection Lead

(Park Air part number 17E12600001)

❑ SMB to BNC Lead for reference frequency

(Park Air part number 17K11000004)

T6T 50 W VHF Transmitter Page 8 Mai ntenance

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Top Cover

To remove the top cover, locate and unscrew the 18 countersunk s crews securing the top cover to the mainframe. Access can then be gained to the following modules:

❑ Processor module ❑ P SU Regula tion module ❑ P owe r Supply (requires top cover and bottom cover to be removed) ❑ RF PA module (requires top cover and bottom cover to be removed) ❑ F ront Panel assembly P CB (requires top cover and bottom cover to be removed)

Removing and Refitting the Processor Module

The Processor module is located as shown in Fig 3. A module removal diagram is shown in Fig 4.

WARNING Dangerous Voltages

Dangerous voltages are presen t within the transmitter. Care must b e taken by personn el to avoid accidental contact with exposed circuitry when the top cover is removed and power is appl i ed to the radio.

Removal

Before attempting to remove the Processor module, and if possible, save the radio’s settings. To achieve this 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 18 countersunk screws and remove the transmitter’s top cover. (2) Locate the Processor module (Fig 3) and disconnect the following connectors (Fig 4):

❑ CN1 50-way connector (50-way ribbon cable from PA Control module)

❑ CN3 14-way connector (14-way ribbon cable from PSU Regulator module)

❑ CN4 34-way connector (34-way ribbon cable from Front Panel module).

(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 screws 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’s mainframe. (5) Remove the module from the chassis.

Refitting

To refit the Processor module, proceed as follows:

(1) Place the module in position. Ensure no wires are trapped by the mod ule. En sure jump er J2 on

the module is set to ‘T’ for transmitter (see the following diagram).

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JP2

Shown set for

transmitter

IC20IC19

IC21

TS7

C84

R/TR

IC25

IC27

IC38

(1) Ensure the module’s interface connectors CN5 an d 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. (2) Fit the 11 (Mod Strike 5 modules), 7 (Mod Strike 6 and 7 modules) M3 x 8 mm screws that secure

the module to the transmitter’s mainframe, but leave them loose. (3) Using a 5 mm nut spinner, tighten the four screwloc 8 mm-4-40 UNC screws and wavy washers

that secure the connec tors; then tighten the 11 (Mod Strike 5 mo dules), 7 (Mod S trike 6 and 7

modules) M3 x 8 mm screws that secure the module to the transmitter’s mainframe. (4) Refit the following connectors to the module:

❑ CN1 50-way connector (50-way ribbon cable from PA Control module).

❑ CN3 14-way connector (14-way ribbon cable from PSU Regulator module).

❑ CN4 34-way connector (34-way ribbon cable from Front Panel module).

(5) Re-establish the ac and/or dc supplies (take heed of the warning on pa ge 9). (6) Switch power on at the radio using the rear mounted Power switch. (7) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. (8) If a new module has been fitted, connect the VFP PC to the radio using the PC to Radio

Interconnection Lead, P ark A ir p art num ber 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. P ark 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. (9) 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. (10) Carry out the Calibrate routine using the VFP, as detailed in the procedure To C alibrate the

Transmitter on page 22.

(11) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (12) Set the transmitter’s internal reference frequency by carrying out the procedure detailed on

page 3.

T6T 50 W VHF Transmitter Page 10 Maintenance

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(13) Remove the VFP connector and switch power off at the transmitter using the rear mounted

Power switch. Isolate the transmitter from the ac and/or dc supplies. (14) Refit the transmitter’s top cover (take note of repairs caution (1) on page 7 before carrying out

this task). The transmitter can now be returned to service.

Removing and Refitting the PSU Regulator Module

The PSU Regulator module is located as shown in Fig 3. A module removal diagram is shown in Fig 5.

Removal

Before attempting to remove the PSU Regulator module, ensure that the transmitter is isolated from the ac and dc input supplies. Then proceed as follows:

(1) Remove the transmitter’s top cover as described on page 9 (take heed of th e warn ing). (2) Locate the PSU Regulator module and remove the three M3 x 8 mm captive washer screws that

secure the module to the transmitter’s mainframe. (3) Carefully raise the module to gain access to the module connectors. (4) Disconnect the following connectors:

❑ CN5 10-way connector (10-way ribbon cable to PA Control module)

❑ CN6 6-way connector (2-way loom to power supply). Note caution (3) on page 8

❑ CN4 14-way connector (14-way ribbon cable to Processor module)

❑ CN3 3-way connector (3-wire loom to PA module)

❑ CN7 3-way connector (3-wire loom to rear panel On/Off switch). Note caution (3) on page 8

❑ CN2 2-way connector (2-wire loom from dc input connector on rear panel)

❑ CN1 4-way connector (4-wire cable from power supply)

❑ CN9 2-way connector (2-wire cable ac input to power supply)

❑ CN8 3-way connector (2-wire loom to rear panel ac input connector plus chassis connection).

(5) Remove the module from the chassis.

Refitting

To refit the PSU Regulator module, proceed as follows:

(1) While holding the module in position, connect the following connectors:

❑ CN8 3-way connector (2-wire loom to rear panel ac input connector plus chassis connection)

❑ CN9 2-way connector (2-wire cable ac input to power supply)

❑ CN1 4-way connector (4-wire cable from power supply)

❑ CN2 2-way connector (2-wire loom from dc input connector on rear panel)

❑ CN7 3-way connector (3-wire loom to rear panel On/Off switch)

❑ CN3 3-way connector (3-wire loom to PA module)

❑ CN4 14-way connector (14-way ribbon cable to Processor module)

❑ CN6 6-way connector (2-way loom to power supply)

❑ CN5 10-way connector (10-way ribbon cable to PA Control module).

(2) Locate the module in position. Ensure no wires are trapped by the module.

T6T 50 W VHF Transmitter Page 11 Maintenance

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(3) Secure the module to the transmitter’s mainframe using the three M3 x 8 mm captive washer

screws removed during the removal procedure. (4) Re-establish the ac and/or dc supplies (take heed of the warning on pa ge 7). (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) Switch power off at the transmitter using the rear mounted Power switch. Isolate the transmitter

from the ac and/or dc supplies. (9) Refit the transmitter’s top cover. The transmitter can now be returned to service.

Bottom Cover

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 following modules:

❑ P A Cont rol modu le ❑ P owe r Suppl y (requires top and bottom covers to be removed) ❑ P A mod ule (requires top and bottom covers to be removed) ❑ F ront Panel assembly (requires top and bottom covers to be removed).

WARNING Dangerous Voltages

Dangerous voltages are presen t within the transmitter. Care must b e taken by personn el to avoid accidental contact with exposed circuitry when the bottom cover is removed and power is applied to the radio.

Removing and Refitting the PA Control Module

The PA Control module is located as shown in Fig 3. A module removal diagram is shown in Fig 6.

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) Remove the transmitter’s bottom cover as described above (take heed of the warning). (2) Locate the module and disconnect the following connectors:

❑ CN1 50-way connector (50-way ribbon cable from Processor module)

❑ CN6 10-way connector (10-way ribbon cable from PSU Regulator module)

❑ CN5 SMB connector (reference frequency)

❑ CN3 SMB connector (RF drive)

❑ CN4 SMB connector (forward power sense)

❑ CN2 6-way connector (5-wire loom to PA module).

(3) Remove the seven M3 x 8 mm captive washer screws that secure the module to the transmitter’s

mainframe. (4) Remove the module from the chassis.

T6T 50 W VHF Transmitter Page 12 Maintenance

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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 seven M3 x 8 captive washer screws that secure the module to the transmitter’s

mainframe. (3) Refit the following connectors to the module:

❑ CN2 6-way connector (5-wire loom to PA module)

❑ CN4 SMB connector (forward power sense)

❑ CN3 SMB connector (RF drive)

❑ CN5 SMB connector (reference frequency)

❑ CN6 10-way connector (10-way ribbon cable from PSU Regulator module)

❑ CN1 50-way connector (50-way ribbon cable from Processor module).

(4) Re-establish the ac and/or dc supplies (take heed of the warning on pa ge 12). (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 Tr ansm itter on page 22.

(8) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (9) Set the transmitter’s internal reference frequency by carrying out the procedure detailed on

page 3.

(10) Remove the VFP connector and switch power off at the transmitter using the rear mounted

Power switch. Isolate the transmitter from the ac and/or dc supplies. (11) Refit the transmitter’s bottom cover. The transmitter can now be returned to service.

Removing and Refitting the Power Supply

The Power Supply is located as shown in Fig 3. A module removal diagram is shown in Fig 7.

Removal

Before attempting to rem ove the Power Supply, ensure t hat the trans mitter is isolated fr om the ac and dc input supplies. Then proceed as follows:

(1) Remove the transmitter’s top and bottom covers as described on page 9 and page 12 (take heed

of the warnings on those pages). (2) Support the radio on its side. (3) Locate the power supply. From the bottom half of the unit remove the four No. 6 x 32 UNC

countersunk screws that se cure the power supply to the transmitter’s mainframe. During this

operation support the power supply from the top half of the unit. (4) Withdraw the power suppl y 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 connector CN4 (power supply to the power regulator). (6) Disconnect the dc wires from the eight connector terminal block.

T6T 50 W VHF Transmitter Page 13 Maintenance

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(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 the power supply from the transmitter.

Refitting

(1) With the transmitter on its side hold the 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 2 and terminal 3 and

black to terminal 6 and terminal 7. (4) Connect connector 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 the four countersunk screws. (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) Switch power off at the transmitter using the rear mounted Power switch. Isolate the transmitter

from the ac and/or dc supplies. (11) Refit the transmitter’s top and bottom covers. The transmitter can now be returned to service.

Removing and Refitting the PA Module

The PA module is located as shown in Fig 3. A module removal diag ram is shown in Fig 8.

Removal

Before attempting to remove t he PA module, ensure that the transm itter is isolated from the ac and dc input supplies. Then proceed as follows:

(1) Remove the transmitter’s top and bottom covers as described on page 9 and page 12 (take heed

of the warnings on those pages). (2) Remove CN3 from the PSU Regulator module. (3) With the transmitter upside-down disconnect CN2 from the PA Control module. (4) Disconnect the SMB connectors CN8 and CN10. Note that CN10 is located within the heatsink

fins and should be disconnected using long nosed pliers. Do not attempt to remove the connector

by pulling on the cable. (5) Remove the black equipment handle from the PA side of the radio by unscrewing and removing

the two M5 x 16 mm panhead screws that secures it to the transmitter. (6) Remove the six M3 x 8 mm countersunk screws and two M3 x 8 mm captive screws that secure

the PA from t he bottom and top of the mainfram e as show n in Fig 8. Ensure the PA module is

well supported during this operation. (7) Withdraw the PA module from the mainframe taking care not to snag the wiring looms.

T6T 50 W VHF Transmitter Page 14 Maintenance

Back to Transmitter Main Page

Refitting

To refit the PA module, proceed as follows:

(1) Place the module in position and butt it up to the mainframe. Ensure no wires are trapped by the

module. (2) Fit the six M3 x 8 countersunk screws and two M3 x 8 mm captive screws that secure the module

to the transmitter’s mainframe. (3) Fit the black equipment handle to the PA side of the radio using the two M5 x 16 mm panhead

screws. (4) Connect the SMB connectors CN8 and CN10. Note that CN10 is located within the heatsink fins

and should be connected using long nosed pliers if unable to use fingers in the enclosed space. (5) With the transmitter upside-down connect CN2 to the PA Control module. (6) Fit CN3 to the PSU Regulator module. (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 the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure

To Calibrate the Tr ansm itter on page 22.

(11) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (12) Remove the VFP connector and switch power off at the transmitter using the rear mounted

Power switch. Isolate the transmitter from the ac and/or dc supplies. (13) Refit the transmitter’s top and bottom covers. The transmitter can now be returned to service.

Removing and Refitting the Front Panel Assembly PCB

The Front Panel assembly is located as shown in Fig 3. An assembly and PCB removal diagram is shown in Fig 9.

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’s top and bottom covers as described on page 9 and page 12 (take heed

of the warnings on those pages). (2) Disconnect CN4 at the Processor module. Carefully pull the cable through the aperture in the

mainfram e to fr e e it. (3) Disconnect SMB connector CN5 at the PA Control module. (4) Remove the four M3 x 8 mm countersunk screws from the bottom and top of the mainframe box

section (see Fig 9, Diagram A). (5) Remove the t wo black equipm ent handles by unscrewing and removing the four M5 x 16 m m

panhead screws that secure them to the transmitter. The front panel can now be moved forward

and away from the mainframe. (6) At the front panel, 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.

T6T 50 W VHF Transmitter Page 15 Maintenance

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(7) Remove the Front Panel PCB from the Front Panel assembly by removing the six M3 x 6 mm

panhead screws and wavy washers (see Fig 9 Diagram B).

Refitting

To refit the Front Panel assembly PCB, proceed as follows:

(1) Place the PCB in position at the Front Panel assembly. 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 (see Fig 9, Diagram B). (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) Secure the Front Panel assem bly to the top and bot tom of the mainfr am e box se ction using the

four M3 x 8 mm countersunk screws. Fit the two black equipment handles using the four

M5 x 16 mm panh ead screws (see Fig 9, Diagram A). (4) Route the ribbon cable to the Processor module connector CN4 and connect it. (5) Route the SMB connector to CN5 on the PA Control module and connect it. (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) Switch power off at the transmitter using the rear mounted Power switch. Isolate the transmitter

from the ac and/or dc supplies. (11) Refit the transmitter’s top and bottom covers. The transmitter can now be returned to service.

Removing and Refitting the Cooling Fan

The cooling fan is at the rear of the PA module as shown in Fig 3. An assembly and removal diagram is shown in Fig 10.

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 fan's finger guard. (3) Using an Allen key, inserted through the holes in the fan exposed with the finger guard removed,

remove the three M4 x 12 mm c aphead Allen screws that secure the fan to the PA module

heatsink. (4) Remove the fan from the PA module.

Refitting

To refit the cooling fan, proceed as follows:

(1) Locate the fan in position and using a suitable All en key inserted through the holes for the fan's

finger guard, secure using the three M4 x 12 mm caphead Allen screws. (2) Secure the finger guard to the fan.

T6T 50 W VHF Transmitter Page 16 Maintenance

Back to Transmitter Main Page

(3) Connect the 2-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 indicat or is lit and the Alarm indica tor is unlit. The transmitte r can

now be returned to service.

T6T 50 W VHF Transmitter Page 17 Maintenance

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Virtual Fr ont 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. ❑ F ront Pan el Lock is available only when us ing the VFP. As part of the transm itter’s Settings (see

typical screen display shown below), Front Panel Lock can be set to ON. When selected to on, no settings or frequency information can be changed from the front panel.

❑ I f the transmitter is part of a M ARC system or opera tes in a dig ital mode, a M ARC Lock, HDLC

Lock and T1E1 Lock are availa ble when using the VFP. When se lected to on, no settings or frequency information c an be changed f rom the MARC equ ipment screen, or the d igital control equipment.

Typical VFP Screen - AM-Voice Profile Shown

T6T 50 W VHF Transmitter Page 18 Maintenance

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Installing the VFP Software

The VFP software is supplied by P ark Air on CD-ROM . The s oftwa re can be run f rom the Mai n page o r 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 VF P icon is shown on the desk top. 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:

❑ B la ck indicates a valid paramete r 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. FileHas 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 PortHas the sub-categories: Com 1 an d 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. RadioHas the sub-categories: Retrieve, Send, Calibrate and Test. This category allows a radio’s prof ile to be loa ded i nto the VFP , a llows a profile to be d ownloa ded f rom

the VFP to a radio, calibrates a radio and initiates a BIT test. HelpProvides detail about the VFP software.

Settings Wind ow

This window lists all attributes th at can b e adjusted by the us er. 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.

T6T 50 W VHF Transmitter Page 19 Maintenance

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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’s reference frequency setting is displayed in the window. Adjusting the reference frequency is a maintenance operation that requires external test equip men t to be connected. The value shown in the Settings win dow should not be cha nged; instead, adjustm ent of the reference frequenc y should be performed using the radio’s front panel controls as detailed on page 3.

Channe l s Window

Up to 100 preset channe ls can be stored in the radio. These are l isted in the Channels window. Any channel frequency can be ame nded 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 en tries.

Status Information Window

The Status Inf ormation window gives inform ation regarding the ty pe 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/Dia gnostics connector to the PC’s Com Port 1 or Com Port 2

(note which Com P ort is used). (2) Run up the VFP software and check that a blank VFP screen (as shown below) is displayed.

T6T 50 W VHF Transmitter Page 20 Maintenance

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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, selectFile > Open > All

or,File > Open >Settings

or,File > Open > Channel

or,File > Open > BIT

To load information from the radio, selectRadio > 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 dow nload int o the radio, select Radio > Send > All

or,Radio > Send > Settings

or,Radio > Send > Channel

To download to a file, selectFile > Send > All

or,File > Send > Setti ngs

or,File > Send > Channel

or,File > Send > BIT

T6T 50 W VHF Transmitter Page 21 Maintenance

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(7) Check that after downloading to a radio, no invalid parameters are returned (such param eters

are displayed as red text). If there are invalid parameters, ame nd them and then repeat the

download. (8) When there is no further requirem ent for using the VFP, ex it the VFP software and d isconnect

the radio from the PC.

To Initiate a BIT Test

During an interruptive BIT te st, the t rans m itter radiates m odul ated c arrier 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.

(1) Using a radio to PC serial interconnection lead, Park Air part number 17E12600001, connect the

radio’s front panel Microphone/Dia gnostics connector to the PC’s Com Port 1 or Com Port 2

(note which Com P ort 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 req uirement 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’s 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/Dia gnostics connector to the PC’s Com Port 1 or Com Port 2

(note which Com P ort 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 B ar sel ec t Radio > Calibrate. T he Confirm screen will then be displayed to remind

you that a dummy load must be connected before proceeding.

T6T 50 W VHF Transmitter Page 22 Maintenance

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(8) With the Confirm scree n displa yed and dummy load conne cted, select Y

es 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 acc ess to the PA Control module and identify RV8 (see component layout diagram on

page 24). From the transmitter’s front panel AM-Voice or AM-MSK Settings screen, select PTT

On. (11) From the Settings pane of the VFP screen, note the RF power setting. Adjust RV8 until the power

meter reads this value. (12) From the transm itter’s 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) W hen there is no further re quirement for using the VFP, ex it the VF P software and d isconnect

the radio from the PC.

T6T 50 W VHF Transmitter Page 23 Maintenance

Location of RV8

Back to Transmitter Main Page

Small Scr eening Can

RV8

R135

R455 R456

C424

RV8

D24

R231

R130 R131

R125 C421

CN4

Locat i on of PA Control Module RV8

R382

TP10

R243

R348

Figs 1 to 10 follow

T6T 50 W VHF Transmitter Page 24 Maintenance

Front View

Back to Transmitter Main Page

ANTENNA

DANGER HIGH

RF VOLTAGES

CONNECT ANTENNA

BEFORE

USE

T1/E1 HDLC

MARC

DATA

AUDIO

Rear V ie w

MARC FACILITIES

RATINGS

AC SUPPLY

48 - 62H z

~ 110 - 240V ( +10%) 4A

POWER 400VA max

DC SUPPLY

21.6 - 32V 10A

SEE INSTALLATION INSTRUCTIONS BEFORE

CONNECTING SUPPLIES

DISCONNECT SUPPLIES WHEN NOT IN USE

FUSE F2

110-240V T4A 250V IEC

110V - 120V T4A 125V UL

FUSE F1

F15A 32V

AC SUPPLY

SUPPLY

FUSE F2

FUSE F1

DC SUPPLY

SA3597 SA3594

Fig 1 T6T Front and Rear Panels

Connections Name Characteris tic

Processor

CN4-1

CN4-2

CN4-3

CN4-4

CN4-5

CN4-6

CN4-7

CN4-8

CN4-9

CN4-10

CN4-11

CN4- 12

CN4- 13

CN4-14

CN4-15

CN4-16

CN4-17

CN4-18

CN4- 19

CN4-20

CN4-21

CN4-22

CN4-23

CN4-24

CN4- 25

CN4- 28

CN4-29

CN4-30

CN4-31

CN4-33

CN4-34

Connections

Regulation

CN4-1

CN4-2

CN4-3

CN4-4

CN4-5

CN4-6

CN4-7

CN4-8

CN4-9

CN4-10

CN4-11

CN4-12

CN4-13

CN4-14

Connections

Regulation

CN5-1

CN5-2

CN5-3

CN5-4

CN5-5

CN5-6

CN5-7

CN5-8

CN5-9

CN5-10

Connections Name

Processor

CN8 Tip

CN8 Ring

CN8 Sl eeve Groun d 0 V

CN1-1

CN1-2

CN1-3

CN1-4

CN1-5

CN1-6

CN1-7

CN1-8

CN1-9

CN1- 10

CN1- 11

CN1- 12

CN1- 13

CN1- 14

CN1- 15

CN1-16

CN1-17

CN1-18

CN1-19

CN1-20

CN1-21

CN1-22

CN1-23

CN1-24

CN1-25

CN1-26CN 4-26

CN1-27CN 4-27 CN1-28

CN1-29

CN1-30

CN1-31

CN1-32CN4-32

CN1-33

CN1-34

Processor

CN3-1

CN3-2

CN3-3

CN3-4

CN3-5

CN3-6

CN3-7

CN3-8

CN3-9

CN3-10

CN3-11

CN3-12

CN3-13

CN3-14

PA Control

CN6-1

CN6-2

CN6-3

CN6-4

CN6-5

CN6-6

CN6-7

CN6-8

CN6-9

CN6- 10

External Speaker

Processor

Front Panel

Connections

CN5-1

CN5-2

CN5-3

CN5-4

CN5-575

CN5-6

CN5-7

CN5-8

LED Alarm

LED Ready

LED Standby

LED Tx

LCD RS

LCD R/W

LCD Enable

Data 0

Data 1

Data 2

Data 3

Data 4

Data 5

Data 6

Data 7

LCD Backlight

Transmit Data

+5 V Supply

Receive Data

-5 V Supply

Ground

+15 V Supply

Ground 0 V

LED RX (not used)

Turn +

Turn -

Push

Mic PTT

Ground

Sidetone (Headset Drive) 3 V ac pk-pk

Loudspeaker Amp Drive

Ground

Mic Input

Ground 0V

Name Characteristic

+15 V Supply

+5 V Supply

Ground

-15 V Supply

ac Detect

dc Detect

V Unreg

Remote on/off

n/c

Name

+15 V Supply

+5 V Supply

Ground

-15 V Supply

ac Detect

dc Detect

External Speaker Drive

External Speaker Drive 3 Vac pk-pk max

Facilities

80 V

Open collector (5mA)

TTL

Open collector (200mA)

RS232

+5 V

RS232

-5 V

0 V

+1 5 V

Open collector (5mA)

5 V pull-up

0 V=PTT,5 V pull-up=PTT

0 V

2V p-p ma ximu m

1.6V p-p maximum

+15 V

+5 V

-15 V

15V on, 0V off

Open collector

21.6 to 32 V

0V = off, open collector = on

n/c

Characteristic

+15 V

+5 V

-15 V

n/c

Characteristic

3 Vac pk-pk max

Ground 0 V

E Bit

PTT

External VSWR

Antenna Change Over

Sque lch Defea t (not used)

Ground

CharacteristicName

TT L pul l-u p ac tive lo w Grounding output +/- 60V , 100mA max.

TT L pul l-u p ac tive lo w

Grounding output +/- 60V , 100mA max.

Grounding output +/- 60V,

100mA max.

TT L pull-up active low

Connections Name

Front Panel

Mic roph one /

Diagnostics

CN2-1 1 Ground - Microphone 0 V

CN2-2

CN2-3 3

CN2-4 4 Receive Data RS232

CN2-5 5 Sidetone (Headset Drive) 3 Vac pk-pk, 200R

CN2-6

CN2-7 7 Gr ound 0 V

Front Pane l

2 Transmit Data RS232

MIC PTT

6 Microphone I nput

CN2

Microphone/Diagnostics

Power Supply Regulation

CN7

(Rear Pa nel)

Connections

Regulator

CN3-1

CN3-2

CN3-3

Connections

CN5-9

Facilities

10 Inhi bit

11 BIT Interruptive Test

Processor

CN5-10

CN5-11

CN5-12

CN5-13

CN5-14

CN5-15

0 V = PT T, 5 V pul l-up = not P TT

6k8 input impedance , 5mV sensitiv ity

Connections

Front Panel

CN3-1

CN3-2 CN3-3

CN4

CN5

CN6

CN3

Suppl y (shown in off position)

CN3 V Unreg

Heatsink

CN3 CN4

T1/E1

HDLC

A B C D

CN7

Loudspeaker Output

Ground

n/c n/c

CN3

CN4

CN212

CN8

CN9

CN1

RF PA

MARC AUDIO

MARC DATA

CN6

Name

Unregulate d Supply

RSSI (not used)

Ready Output

Tape Output

Reserved

Name

CN5

1 L

2 N

Connections

Name

-33 V

Ground Supply

MARC

EXT

SPKR

CN8

Open collector, 0 V = Ready

Characteristic

7.5V pk-pk Max

0 V

CN1

Reference Frequency (Front Panel)

Processor

CN2-1

Characteristic

21.6 to 32 V

n/c

0 V

Facilities

CN5

Characteristic

Fused 300mA 21.6 to 32 V

TT L pull-up active l ow

Potential range 0 V to 10 V

-10 dBm. 100R

n/c

Connections

Processor

MARC P ort

CN6-1

CN6-2

CN6-3

CN6-4

CN6-5

CN6-6

CN6-7 7

CN6-8

CN6-9 9

Connections

DC Input Regulati on

Input-1 CN2-2

In put- 2 CN 2-1 Gr oun d Su pply 0 V

Input-3 n/c

dc I nput

(Rear Panel)

CN1-1

RF PA

Char acteri sticName

n/c

CN2

CN1

Processor

***

PA Control

CN2-1

CN2-2

CN2-4

CN2-5

CN2-6

PA Control

CN5-1

dc Input

Connections Na me

CN6-1

CN6-2

CN6-4

CN6-5

CN6-6

Power Supply

Connections

Antenna Port

Connections

PA Control

CN4-1

Connections Name C haracteristic

RF PA

Connections

Front Panel

CN4-1

CN5

CN1

PA Control

Connections Name

RF PA

CN4

CN2

CN7

CN5

CN9

CN12 PA Current De tect (not used) 0.1V per Amp

Name

Ground

Line I n +

Line In -

PTT Input

Unregulated Su pply

Data RX B - Data I n +

Data RX A - Data I n - RS422

Data TX A - Data Out -

Name Characteristic

Fuse d 21.6 to 32 V

n/c

PSURegulation

0 V

PSU OK

PSU OKCN6-3

PSU off

0 V

CN4-3 CN4-1

PSU of f PSU off 0V = 0ff

(Rear Pa nel)

RF Output

Forward Power S ense CN8

Reference Frequency

CN6

PA Temperature

Drive D etect

PA Bias EnableCN2-3

Fan Enable

Reflected Power

Mains IE C

Connector

Filtered/

Fused

CN4

CN1

Name Characteristic

CN3

CN4

CN2

10 mV/°C + 0.5V

0.5 V for +10 dBm

TTL - High for bias on

TT L - High for fan on

50 W = 670 mV

Characteristic

0 V

+20 dBm to -20 dBm 600R

0 V o r +10 V to +60 V or

-10 V to -60 V at 6mA

Fused 500mA, 21.6 to 32 V

RS422

RS422Data TX B - Data Out +

RS422

Characteristic

0 V

0 V O K

o/c OK

0 V = on

0 V

ac Input

5 to 5 0 W

17 dBm ± 1 dB (-30.5 dBc ± 0.9 dB)

1 dBm carrie rRF DriveCN10CN3-1

CharacteristicName

-20 dBm to 0 dBm

Fan

Characteristic

Connections

PSU

CN1-1

CN1-2

CN1-3

CN1-4

Regulation

CN1-1

CN1-2

CN1-3

CN1-4

Name Char acteristic

Ground Supply

Ground Supply 0 V

V Unreg

CN1

CN10

CN8

CN3

CN2

CN4

CN5

CN7

CN9

CN12

CN6

RF PA

CN6

PA Heatsink

CN7A

CN7ACN7A

Pin Number1Name

6 7

CN7B

CN7BCN7B

Pin Number

0 V

29 V

Fan Control

Fan

Ground 0V

Fan

RRING

RTIP

n/c

TRING

TTIP

n/c n/c n/c

Name

HDLC Rx A

HDLC R x B

HDLC CL A

HDLC T x B

HDLC T x A

HDLC CL B

Ground

Unregulate d Supply

Characteristic

ANSI T1.403-1995 (T1),

ITU-T: G.703 (E1)

ANSI T1.403-1995 (T1),

ITU-T: G.703 (E1)

Char acteri stic

RS 422

21.6V to 32V

***

Connections

CN1-1

CN1-2

CN1-3

CN1-4

CN1-5

CN1-6

CN1-8

CN1-9

CN1-10

CN1-11

CN1-12

CN1-13

CN1-15

CN1-16

CN1-17

CN1-18

CN1-19

CN1-20

CN1-21

CN1-22

CN1-23

CN1-24

CN1-25

CN1-26

CN1-27

CN1-28

CN1-29

CN1-30

CN1-31

CN1-32

CN1-33

CN1-34

CN1-35

CN1-36

CN1-37

CN1-38

CN1-39

CN1-40

CN1-41

CN1-42

CN1-43

CN1-44

CN1-45

CN1-46

CN1-47

CN1-48

CN1-49

CN1-50

CharacteristicConnections Name

10V approx. or 26.5V

PA ControlProcessor

CN1-1

CN1-2

CN1-3

CN1-4

CN1-5

CN1-6

CN1-7CN1-7

CN1-8

CN1-9

CN1-10

CN1-11

CN1-12

CN1-13

CN1-15

CN1-16

CN1-17

CN1-18

CN1-19

CN1-20

CN1-21

CN1-22

CN1-23

CN1-24

CN1-25

CN1-26

CN1-27

CN1-28

CN1-29

CN1-30

CN1-31

CN1-32

CN1-33

CN1-34

CN1-35

CN1-36

CN1-37

CN1-38

CN1-39

CN1-40

CN1-41

CN1-42

CN1-43

CN1-44

CN1-45

CN1-46

CN1-47

CN1-48

CN1-49

CN1-50

CN7C

CN7CCN7C

Pin Number1Name

Data Rx A (Data In -)

Data Rx B (Data In +)

n/c

Data Tx B (Data Out +) Data Tx A (Data Out -)

Remote Supply On/Off

Ground

Unregulated Su pply

CN7D

CN7DCN7D

Pin Number

Ground

IF AGC (Not used)

Ground

RF AGC (Not used)

Ground

BIT I Monitor

Ground

BIT Q Monitor

Ground

Tx/Rx Detect

Power Down

Ground

Filter 0

Filter 1

Filter 2

Filter 3

Filter 4

Ground

Synth Load

Data

Clock

Phase Load

Reserved

Tx Key

Auto Level Control

PA Temperature

Reflected Power

PAC Temperature

External VSWR

Narrow/Wide (Not used)

BIT C ontrol 0

BIT C ontrol 1

BIT O pen Loop

BIT S ynth Lock

BIT Loop Correct

BIT V SWR OK

RF PA Bias Disable

Fan Enable

OCXO F itted

Reserved

Step Size (Not used)

TR Detect

V/U Dete ct

BIT Contr ol 2 (Not used)

BIT Contr ol 3 (Not used)

Name

Line In -

Line In +

Fast Antenna Change Over /

PTT

Not used

PTT Input

Ground

Not used

Name Characteristic

Char acteri stic

RS 422

21.6V to 32V

Characteristic

+20 dBm to -20 dBm 600R

NPN open collector

grounding transistor

+20 dBm to -20 dBm 600R

0 V or +10 V to +60 V or

-10 V to -60 V at 6mA

0 V

0 V or +10 V to +60 V or

-10 V to -60 V at 6mA

0 V

0 to 2.5 V

0 V

0 to 2.5 V

0 V

0 to 2.5 V

0 V

±2.5 V

0 V

±2.5 V

0 V

0 to 2.5 V

0 V

0 to 4 V / 0 to 6VFrequency TrimCN1-14 CN1-14

TTL

TT L pull up active low

0 V

TTL

0 V

TTL

0 to 5 V (5 V 3dB back off)

10 mV / °C

0 to 2.5 V

10 mV / °C

TTL

TTL - High fan on

TT L - Low OCX O fitted

TTL

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T6S2VHF Tx Interconnection and Wiring

Fig 2 Wiring and Interconnection Diagram

Antenna Connecto r

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Regulation Module

Power Supply

Processor Module

Fan

VHF TX PA Control Module

VHF TX RF PA Module

Tx Module Location

View on underside - Bot t om Cover re m oved

Top view - Top Cover removed

T6 Series 2 VHF Transmitter

Module Location Diagr am

Front Panel Module

Fig 3 Modu le Lo c at i on D i agram

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8 N

C A P

GA10931

Fig 4 Processor Module - Removal and

Refitting D etail

CN8

Brown (L)

Blue (N)

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CN6

CN7

CN2

CN1

CN3

GA10929

Fig 5 PSU Regulator Module - Removal and

Refitting D etail

This connector will twist on itself

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CN3

CN4

CN5

CN4

Fig 6 PA Control Module - Removal and

Refitting Detail

Power Su ppl y

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GA10928

Fig 7 Power Supply - Removal and

Refitting D etail

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GA10930

Fig 8 PA Module - Removal and

Refitting D etail

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CN5 PA Control

Diagram A

Allen head grub screw

Front panel PCB

Front P anel

Diagram B

GA10944, GA10927

Fig 9 Front Panel Assembly PCB - Removal

and Refitting Detail

Park Air Systems B6350-S2 User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual