Park Air Systems B63100HS User Manual

T6T VHF 100 W Transmitter

User Documentation

Errata

Any errors found in this handbook are promulgated through the Park Air FTP network. Any user can access this information by logging on to:

ftp.parkairsystems.com

When logged on, select the public (Pub) folder, then the Handbook Errata Sheets folder,

and then select the required equipment model.

[Adobe Acrobat™ must be loaded on your PC to use this facility]

Handbook Title: T6T VHF 100 W Transmitter User Documentation Handbook Part Number: 31-3T6T100V Handbook Version: 2.0 Date of Issue: February 2005 Equipment Modification Level 7 Published By: Park Air Systems

Northfields Market Deeping Peterborough PE6 8UE England

Telephone: From UK, 01778 345434

From outside UK, 44 1778 345434

Fax: From UK, 01778 342877

From outside UK, 44 1778 342877

www.parkairsystems.com

Page ii T6T VHF 100 W Transmitter

Health and Safety

Warnings

A warning is used to indi cate possibl e danger to personnel. Th roughout P ark Air hand books, war nings are indicated by the following symbols:

Indicates electrical danger to personnel.WARNING

WARNING

Indicates a hazardous material.

Indicates a non-ionizing radiation hazard.

Indicates a specified danger to personnel.

Cautions

A caution is used to indicate possible danger to the equipment.

Indicates the presence of electrostatic sensitive devices (ESSD). Caution

Indicates a specified danger to the equipment. Caution

Trademarks

The following tradenames are used in this handbook.

IBM This is a registered trademark of International Business Machines. Microsoft This is a registered trademark of Microsoft Corporation in the USA and other

countries.

Windows This is a registered trademark of Microsoft Corporation in the USA and other

countries.

T6T VHF 100 W Transmitter Page iii

List of Abbreviations

ac alternating current AGC automatic gain control AM amplitude modulation ATC air traffic control BER bit error rate BIT built-in test C celsius CD compact disk dB decibel dc direct current DSB double sideband E-BIT external bit signal ESSD electrostatic se nsiti ve devices Fig figure FM frequency modulation Hz hertz

RF radio frequency ROM read-only memory RSE2 remote site equipment RSSI receiver signal strength indication Vvolt VFP virtual front panel VHF very high frequency VOGAD voice-operated gain adjusting device VSWR voltage standing wave ratio Wwatt

IF intermediate frequency kg kilogramme kHz kilohertz LCD liquid crystal display mmetre mA milliamp MARC multi-access remote control mm millimetre mW milliwatt MHz megahertz MSK minimum shift keying PA power amplifier PC personal computer PCB printed circuit board pk-pk peak-to-peak ppm parts per million PSU power supply unit PTT press to transmit

Page iv T6T VHF 100 W Transmitter

Approvals and Standards T6T VHF 100 Watt Transmitters

This Class B digital apparatus complies with Canadian ICES-003

Approvals:

The equipment is designed to meet the essential requirements of Directives 1999/5/EC, 89/336EEC as amended by Directive 93/68/EEC, and 72/23/EEC.

Standards:

The following standards are applied:

EMC EN 301 489-1; EN 301 489-22.

Health & Safety, EN 60950, CAN/CSA-C22.2 No. 60950, UL 60950.

Radio EN 300 676, IC RSS141, FCC part 15 and 87.

Telecom CS-03.

FCC Statement:

This device has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

-Reorient or relocate the receiving antenna.

-Increase the separation between the equipment and the receiver.

-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-Consult the supplier or an experienced radio/TV technician for help.

Operation on 8.33 kHz channel spacing is restricted to European customers.

About This Hard Copy

This document, apart fr om the preface, is a hard copy of the files contai ned on the CD and co mprises the following parts:

Preface (not on CD) Introduction Specification Operation Installation Maintenance.

Page vi T6T VHF 100 W Transmitter

Introduction

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This topic gives a brief introduction to the T6T VHF 100 W Multimode Transmitter.

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Purpose

The T6T VHF multim ode 100 W transmitter i s intended for use in fixed ground envir onments such as airports and en-route centres. The transmitter operates in voice and ICAO defined data modes at frequencies between 118 and 136.975 MHz.

Dependent on the software loaded into the radio, the following operating modes can be selected:

❑ AM-Voice. All transmitters have this mode ❑ AM-MSK (optional) ❑ Mode 2 (optional) ❑ Mode 3 (optional).

Fig 1 T6T VHF 100 W Transmitter

Models and Part Numbers

The following table identifies the T6T VHF 100 W transmitters:

Description Part Number Frequency Range Channel

T6T 100 W standard frequency coverage high stability transmitter

B63100HS/NB 118 to 136.975 MHz 25 kHz or

Spacing

(AM-Voice)

8.33 kHz

Special

Applications

Supports 5-offset carrier operation

Mechanical Installation

The transmitter fits i nto a n i ndu strial standard 19 in ch (483 mm) equipment cabine t an d o cc upies 4U of space.

T6T VHF 100 W Transmitter Page 2 Introduction

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Frequency Selection

T6 radios operate with 8.33 kHz and 25 kHz channel spacing. The radios recognize frequencies entered in ICAO format and automa tically ad just to t he corr ect channe l spaci ng. For m ultichan nel operati on up to 100 preset frequency cha nnels can be stored in the radi o for immediate recall; any combina tion of

8.33 kHz and 25 kHz channel spacing can be stored. Any valid operating frequency can be selected from the radio’s front panel or a compatible remote control equipment.

Operating Parameters

The transmitter’s o per at ing pa ra mete rs a re se t us ing the front panel multi- purpose Scroll/Select swi tc h, or by using the Park Air Virtual Front Panel (VFP) software in conjunction with a Personal Computer (PC).

Virtual Front Panel

The Virtual Front Panel (VFP) software supplied on CD with the radio is compatible with any PC or laptop running Windows 2000™ or Windo ws XP ™. T he VFP allo ws ch ang es to a rad io’ s setti ngs and cha nne l information, it dis plays the curre nt BIT state, display s BIT history, allo ws security lo cks to be set, and provides maintenance facilities. A typical VFP presentation is shown in Fig 2. Using the VFP has s ever al advantages over setting a radio from the front panel; these are:

❑ A profile of the operati onal setti ngs an d chann el inform ation c an be cr eated, stored on di sk, and

then recalled to download into other radios.

❑ A print out of the radio’s profile can be made from the VFP. ❑ The front panel controls can be locked. Front Panel Lock is available only when using the VFP.

Fig 2 Typical VFP Presentation

T6T VHF 100 W Transmitter Page 3 Introduction

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Intentionally Blank

Specification

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This section gives the specification applicable to the T6T VHF 100 W Multimode Transmitter operating in AM modes, Mode 2 and Mode 3.

All radios operate in AM-Voice mode. Additional software must be loaded to allow AM-MSK, Mode 2 and Mode 3 operation.

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General Specification

The general speci fication applies t o the T6T 100 watt trans mitter irr espective of the sele cted op erating mode. Separate listings are given for AM modes, Mode 2 and Mode 3. One model of the T6T VHF 100 W Multimode Transmitter is available as detailed in Table 1.

Table 1 100 Watt T6 Transmitter

Description Part Number Frequency Range Special Applications

100 watt, high stability, standard frequency coverage transmitter

B63100HS/NB 118 to 136.975MHz Supports 5-offset carrier

operation

Frequency accuracy

The frequency accuracy is better than 0.3 ppm.

Number of Channels

The transmitter has a multichannel capability. 100 channels can be stored and recalled.

Power Requirements

The transmitter operates from an ac mains supply, or a dc input supply. When both supplies are connected, the dc input acts as an automatic backup for the ac mains.

ac input supply The transmitter operates from a 48 to 62 Hz single-phase ac supply

and automatically adjusts to operate from any supply voltage ranging from 110 Vac to 230 Vac ±10%. The power consumption figures are given in Table 2.

dc input supply The transmitter operates from a dc input supply between 21.6 and

32 V (measured at the radio’s input). Current loading is given in Table 2.

Table 2 Power Consumption

Requirement 100 Watt T rans mitte r Normal Operation

ac dc

Maximum 1000 VA 24 A Typical 600 VA 17 A Not Transmitti ng 90 VA 1.5 A

T6T VHF 100 W Transmitter Page 2 Specification

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Dimensions and Weight

The dimensions and weight of the 100 watt transmitter are:

Width 483 mm (19 inches). Height 177.8 mm (7 inches). The height occupies 4U of equipment cabinet

space.

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

465 mm (18.3 inches) measured from front panel to rear RF connectors.

Weight 25 kg (55 pounds).

Environmental

Temperature range The transmitter operates to specification across the temperature

range of -20°C to +55°C. The transmitter can be stored at temperatures ranging from

-30°C to +70°C without caus ing any dama ge.

Humidity The transmitter operates to specification at a relative humidity

between 5% and 90% non-condensing.

Altitude The transmitter operates to specification up to 15,000 feet.

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

Shock and vibration The transmitter complies with shock and vibration protection

MIL-STD-810E, method 516.4, procedure VI - Bench Handling.

Ventilation The transmitter is cooled by integral fans, which normally runs at half

speed. At an RF PA temperature of 45°C this is increased to full speed and at 40°C it reduces to half speed again.

The transmitter power supply units also use internal fans.

Warm up time The transmitter is fully operational within 20 seconds but can take up

to 10 minutes to achieve frequency accuracy for offset carrier.

T6T VHF 100 W Transmitter Page 3 Specification

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AM Modes

The transmitter can oper at e in A M-Vo ic e mo de (st anda rd ) and A M- MS K mo de (opti on al) . The fo ll owi ng specifications apply to both modes unless stated otherwise.

Transmitter RF Characteristics

RF Power Output

The RF car r ier ou tp ut po w e r i s ad j us t ab le in 2 W s te p s fr om 10 W t o 10 0 W.A s an op tio n, th e maxi mum selectable power can be limited. Output power is automatically controlled under the following conditions:

Frequency range Variations in power remain within 0 to +1 dB over the operational

frequency range.

Low supply voltage Variations in power remain within ±1 dB for supply voltages between

24 Vdc and 32 Vdc.

High VSWR Loop error can reduce power progressively by up to 3 dB. Variations

in power remain within ±1 dB into a VSWR of up to 2.5:1. At a VSWR greater than this the output power may be reduced by 10 dB ±1 dB.

High RF PA temperature If the RF PA temperature sensor exceeds 80°C the output power is

reduced by 3 dB ±1 dB. If the RF PA temperature sensor exceeds 90°C the transmitter is de-keyed and automatically re-keyed at 70°C.

PA Module Failure If one of the two PA modules fails, the transmitter will continue to

operate at half power, 50 watts.

Duty Cycle

Both modes 100% continuous operation.

Channel Spacing

AM-Voice mode The transmitter is capable of both 25 kHz channel spacing and

8.33 kHz channel spacing.

AM-MSK mode 25 kHz.

Offset Carrier

AM-Voice mode The transmitter 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

Both modes 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 VHF 100 W Transmitter Page 4 Specification

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Spurious Outputs

Both modes The spurious outputs are less than -46 dBm for modulation depths up

to 90%, measured at greater than 500 kHz from carrier in the frequency range 9 kHz to 4 GHz. There are no coherent spurious outputs above the spectral mask at less than 500 kHz.

Intermodulation

Both modes 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 5K00A3EJN for 8.33 kHz channels.

AM-MSK AM-MSK mode uses Double Sideband (DSB) Amplitude Modulation

(AM) full carrier; emission designator 13K0A2DJN.

Modulation Depth

Both modes The transmitter is capable of modulation depths up to 95%.

Hum and Noise

Both modes 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 VHF 100 W Transmitter Page 5 Specification

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Residual FM

Both modes 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

Voice can be connected t o the transmi tter via the fr ont panel mi crophon e connec tor. Vo ice ca n also be connected via the line inputs. Line level setting from -30 to +10 dBm.

PTT Time O u t

The time out period is adjustable from 2 to 510 seconds in 2 second steps or it can be disabled.

T6T VHF 100 W Transmitter Page 6 Specification

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Mode 2

This section gives the transm itter spe cificati on appl icable to Mo de 2 op eration. Mo de 2 para meters ar e identical to AM-Voice mode parameters with the following exceptions:

RF Power Rise Time

The transmitter pr oduces more than 90% of full power output within the first 2 symbols of th e power stabilization segment, which is the first segment of the training sequence and consists of 4 symbols each representing 000.

RF Power Decay Time

The output power decays by more than 20 dB within 2.5 symbols of the middle of the final symbol.

Channel Spacing

25 kHz channel spacing only.

Transmitter Modulation Characteristics

Mode 2 uses Carrier Sense Multiple Access (CSMA) differentially encoded 8-phase shift keying (D8PSK), using a raised cosine filter with α=0.6 (nominal value), emission designator 14K0G1DE. Information is differ en tial ly en co ded with 3 bi ts p er sy mb ol t ra nsm it ted a s changes in phase rather th an absolute phase. T he data stream i s divided in to groups of 3 con secutive data bits, least si gnificant bit first. Zeros are padded to the end of transmissions if needed for the final channel symbol.

Modulation Rate

The symbol rate is 10,500 symbols/second (±0.005%), resulting in a nominal bit rate of 31,500 bits/s.

RMS Phase Error

The RMS phase error is less than 3°. The error vector magnitude is less than 6%.

Phase Acceleration

The total frequency change during the transmission of the unique word is less than 10 Hz. After this, the phase acceleration is less than 500 Hz/s.

T6T VHF 100 W Transmitter Page 7 Specification

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Mode 3

This section gives the transm itter spe cificati on appl icable to Mo de 3 op eration. Mo de 3 para meters ar e identical to AM-Voice mode parameters with the following exceptions:

RF Power Rise Time

RF Power Decay Time

The output power decays by more than 20 dB within 2.5 symbols of the middle of the final symbol.

Channel Spacing

25 kHz channel spacing only.

Transmitter Modulation Characteristics

Mode 3 uses Time Division Multiple Access (TDMA) differentially encoded 8-phase shift keying (D8PSK), using a raised cosine filter with α=0.6 (nominal value), emission designator 14K0G7WET. Information is differentially encoded with 3 bits per symbol transmitted as changes in phase rather than absolute phase. The data stream is div ided into groups of 3 consecutiv e data bits, least significant bi t first. Zeros are padded to the end of transmissions if needed for the final channel symbol.

Modulation Rate

The symbol rate is 10,500 symbols/second (±0.005%), resulting in a nominal bit rate of 31,500 bits/s.

RMS Phase Error

The RMS phase error is less than 3°. The error vector magnitude is less than 6%.

Phase Acceleration

The total frequency change during the transmission of the unique word is less than 10 Hz. After this, the phase acceleration is less than 500 Hz/s.

T6T VHF 100 W Transmitter Page 8 Specification

Operation

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This topic describes the transmitter’s operating controls and indicators.

It also details how to set up the transmitter’s operating parameters.

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Controls, Indicators and Front Panel Connectors

This section describes the transmitter’s controls, indicators and front panel connectors.

Front Panel

The transmitter’s front panel is illustrated below.

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. During nor mal operati on, the LCD shows th e operating frequency , the channel number (if the channel store faci lity is used), the carrier offset (if us ed), and displays a graphical rep resentation of instantaneous peak power.

The example LCD s creen above sho ws the transmitter operating on 11 8.000 MHz; the frequency has been preset as channel 100 and offset at +7.3 kHz.

Ready Indicator

A green indicator that lights when the transmitter is ready for use and no BIT faults have been detected.

Transmit Indicator

An amber indicator that lights when the transmit circuit is keyed and producing output power.

Alarm Indicator

A red indicator that eit her flashes, or lights, when a BIT fault ha s been detected. BIT indications are classified as either Alarms or Alerts.

If an ‘alert’ conditi on is detected, the Alarm i ndicator flashes, the Ready i ndicator remains lit, and t he transmitter remains operational. A BIT ‘alert’ is indicated if:

❑ The transmitter RF output power has reduced from its setting by more than 1 dB but not more than

3 dB.

❑ The supply volts falls below a pre-defined level.

Any other BIT condit ion results in an alarm. When detected, the Alarm indicator lights and the Ready indicator becomes unlit; the transmitter cannot be used.

T6T VHF 100 W Transmitter Page 2 Operation

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Standby Indicator

A red indicator that lights whe n the tran smitte r is in stan dby mode. Whe n in stand by mode , most of the radio's circuits are inactive, the front panel LCD is blanked, and the transmitter cannot be keyed.

Standby mode is selected and deselected using the front panel Scroll/Select switch and LCD, by initiating an instruction th rough a MARC sys tem, th rough a T6 contr oller or th rough th e VF P. For details of front panel selection and deselection see page 14.

Reference Connector

An SMB jack soc ket that allows a freq uency counter to moni tor the transmitter 's reference frequen cy. This connector is used onl y for mainte nance purpos es. The instr uctions for checking and adjusting the reference frequency are given in the Maintenance section.

Microphone/Diagnostics Connector

A dual purpose conne ctor that allows either a micro phone, o r a PC, t o be connec ted to the trans mitter. The connector is a 7-pin self-locking DIN socket; the pin-out is shown in Table 1.

A microphone is fitted to thi s conn ector to enab le the t ransmit ter to be ope rated in AM loca l mod e. The connections are detailed in Table 1. A PC can also be connected to allow the VFP to be displayed. Using the VFP is detailed in the Maintenance section. The PC connections at the transmitter a re shown in Table 2 on the following page.

Viewed from front

Table 1 Microphone/Diagnostics Connector - 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 Microphone input Input 2 to 35 mV rms on Passive setting and 8 to 140 mV rms on

7Ground - 0V.

Signal

Input or

Output

Description

Active setting to remain in VOGAD range.

Table 2 Microphone/Diagnostics Connector - PC Connections

Number

2 Transmit data Output RS232, 115200 baud, 8 data bits, 1 stop bit, no parity, no

T6T VHF 100 W Transmitter Page 3 Operation

Signal

Input or

Output

Description

handshaking.

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Table 2 Microphone/Diagnostics Connector - PC Connections

Number

4 Receive data Input RS232, 115200 baud, 8 data bits, 1 stop bit, no parity, no

7 Ground - 0 V.

Signal

Input or

Output

Description

handshaking.

Rear Panel Power Switch

The rear panel 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 100 W Transmitter Page 4 Operation

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Setting Up and Operation

Introduction

Setting up the transmi tter involves using the front panel Sc roll/Select switch to specify th e operating parameters.

Operating parameters can also be set using the Virtual Front Panel (VFP), through a Multi-Access Remote Control (MARC) sys tem, from an assoc iated T6 controlle r. VFP operatio n is described on this disk under Maintenance; MARC and T6 controller functionality is described in separate handbooks.

Table 9 on page 32 details the functions and parameters that can be set from all sources.

No attempt to set up the transmitter should be made until the installation procedures, given in the Installation topic, are completed.

Normal Operation

During normal operation, the LCD displays the Main screen. This screen shows the operating frequency, the channel number (i f the channel store facility is used), the c arrier offset (if used), and displays a graphical representation of output power when the transmitter is keyed. If the transmitter has been set to Standby mode, which is shown by the front panel Standby indicator being lit, the LCD is blanked.

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 switc h (referred to throughout this sec tion as the ‘Switch’) is used to leav e the Main screen and display the Control screen (see page 8). Further use of the Sw itch d ispla ys va rious s ele ction menus and allows t he required parameters to be set. Th e switch has three actions: it can b e turned clockwise, anti-clockwise, or momentarily pushed in.

T6T VHF 100 W Transmitter Page 5 Operation

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Screen Protocol

The following protocol is applicable to all screens described in this document.

Main Screen During normal operation, the Main screen (an example of which is shown below

whilst the transmitter is transmitting) is displayed.

F r e q 1 1 8 . 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 m ore fields are available other than those currently displayed. To access

those fields, turn the switch clockwise through the last displayed field.

<< Indicates m ore fields are available other than those currently displayed. To access

those fields, turn the switch anti-clockwise through the first displayed field.

Back When Back is selected, you are returned to the previous menu. Exit When Exit is selected, you are returned to the Main screen.

Menu System

The front panel control of the radio is implemented through a hierarchical menu system as shown on the following page.

T6T VHF 100 W Transmitter Page 6 Operation

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Frequency

Set the

transmitter

operating frequency

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

Control Screen

Configure the transmitter

operating parameters, ac cess

the BIT facility or view the

software configuration

Channel

Set or recall up

to 100 preset

frequency

channels

Settings

Set the

transmitter

operational

settings

Menu Lock Screen

BIT

Initiate a BIT

test and view

results

Displayed during normal

transmitter operation

S/W Config

View the

transmitter

software

configuration

Main Screen

(Example)

Standby

Enter or Exit

standby mode

Backlight

Adjust the

display’s backlight

AM-Voice Mode

Settings

(see page 17)

Ref Freq

Adjust the

transmitter

reference

frequency

Band Edges

Set up the

transmitter

band edges

AM-MSK Mode

Settings

(see page 19)

Menu System

Mode and

Mode

Settings

Select Mode

Polarities

Set the active

polarity for

certain hardwire

connections

Digital Modes (see page 20)

T6T VHF 100 W Transmitter Page 7 Operation

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Menu Lock Screen

A security facility available only from the VFP allows the transmitter front panel to be ‘locked’. When this facility is active, no op erational set tings can be ma de from the front panel until an ‘unlo ck’ 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 pressin g the switch. The following screen is displayed:

Change the transmitter operating frequency.

Store or recall preset channel frequencies. Select operating mode and mode se ttin gs .

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 100 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 chann el spacing , and give guidan ce on the op timum line le vel 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 op erating fr equency of the trans mitter and 8.33 kHz channe l spacing is requi red, 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.

T able 3 25 kHz and 8.33 kHz Channel Spacing Displays

Actual Frequency

(to 4 decimal places)

118.0000 MHz

118.0083 MHz

118.0166 MHz

118.0250 MHz

118.0333 MHz

118.0416 MHz

118.0500 MHz

118.0583 MHz

118.0666 MHz

118.0750 MHz

118.0833 MHz

118.0916 MHz

118.1000 MHz

118.1083 MHz

118.1166 MHz

Channel Spacing Displayed Frequency

25 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 Transmitter's Front Panel

118.0 00 MH z

118.005 MHz

118.010 MHz

118.015 MHz

118.0 25 MH z

118.030 MHz

118.035 MHz

118.040 MHz

118.0 50 MH z

118.055 MHz

118.060 MHz

118.065 MHz

118.0 75 MH z

118.080 MHz

118.085 MHz

118.090 MHz

118.1 00 MH z

118.105 MHz

118.110 MHz

118.115 MHz

118.1250 MHz

118.1333 MHz

118.1416 MHz

T6T VHF 100 W Transmitter Page 9 Operation

25 kHz

8.33 kHz

118.1 25 MH z

118.130 MHz

118.135 MHz

118.140 MHz

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Line Level Setting

The input line leve l s ett ing di spl ay ed on th e fr on t pan el is equivalent to the average s peech l ev el wit h a peak-to-average ratio of 13 dB. This corresponds to the level specified for the lines.

When testing the transmitter using a sine wave, the line input level should be set to 10 dB above the line level setting. The VOGAD and mute thresholds are preset at 10 dB and 15 dB respectively below the line level setting.

Table 4 shows the relationship between the input line level, VOGAD threshold and mute threshold.

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

Line Level Setting

(dBm)

+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)

T6T VHF 100 W Transmitter Page 10 Operation

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Changing the Transmitter Operating Frequency

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

(1) From the Control screen, select

frequency to display the Frequency screen.

(2) Turn the switch to highlight the digit to

be changed, then press the switch.

(3) Turn the switch until the required digit

is shown, then press the switch.

(4) Repeat until the required frequenc y is

shown, then highlight OK and press the switch.

(5) Only frequencies that fall betwee n the

band edge settings can be selected.

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

C a n c e l O K

T6T VHF 100 W Transmitter Page 11 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 the n 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. Th e 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 n 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 ou tside 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 entere d, a m es sage ( se e Cha nne l Screen - Example 4) is displayed.

T6T VHF 100 W Transmitter Page 12 Operation

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To Initiate a BIT Test

Use the following procedure to initiate an interruptive BIT test from the transmitter front panel. A BIT test cannot be initiated while the transmitter is keyed. After a BIT test has been run, the BIT screen is displayed (see AM-Voice and AM-M SK BIT Screen on page 25). An interruptive BIT test cannot be initiated in Mode 2 or Mode 3.

During an interruptive B IT test, t he tran smitt er radia tes mo dulate d carrier wav es at the set powe r. 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 , pres s the s witch to dis play the C ontrol scree n. Tur n the s witch 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 menu is displayed. Turn the switch until 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 100 W Transmitter Page 13 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 power saving feature that can be used for non-operational transmitters. When in standby mode, most of the transmitter's circuits are inactiv e, the LCD is blanked, and the transmi tter 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 displ ay blanks and

the front panel Sta ndby indica tor 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 100 W Transmitter Page 14 Operation

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Settings

Operational settings for the T6T 100 W VHF transmitter a re configured at the front panel, thr ough 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 selec tion, refer ence frequen cy and ba cklight ar e set from th is 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-M SK, Mode 2 or Mode 3. Select to take you to the mode specific Settings menu. Select to take you to the Polarities menu.

Set the transmitter’s frequency band edges. Align the transmitter’s reference frequency (Note 1). Adjust the LCD’s backlight time out (Note 2).

1. Setting the transmitter reference frequency is a maintenance operation. The current value should not be reset unless the correct test equipment is connected. See the Maintenance section.

2. The LCD bac k light ca n b e s et for pe rmane ntl y on, off, or ti med to st ay on for a pe ri od betw een 15 and 120 seconds.

General and mode specifi c sett ings, s how ing de fault valu es, ar e refe renced i n Table 5 on the following page. Click on any required parameter by page number for further references.

T6T VHF 100 W Transmitter Page 15 Operation

Table 5 Operational Settings from the Front Panel

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Parameter Mode Adjustment Range Factory Default Setting Further

Reference

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

mode Exit standby mode All Yes or No - page 14 Set mode of

operation Set polarities AM-Voice,

Band edges All 118.000 to 136.975 MHz 118.000 and 136.975 MHz page 29 LCD backlight All 15 to 120 s, On or Off 30 s page 15 RF power All 10 to 100 W 100 W page 17 Audio line in level AM-Voice,

Inhibit AM-Voice,

PTT (key) AM-Voice,

Tx time out AM-Voice,

Modulation depth AM-Voice,

Mute AM-Voice On or Off On page 17 VOGAD AM-Voice On or Off On page 17 Antenna C/O delay AM-Voice

Offset AM-Voice 0, ±2.5, ±4, ±5, ±7.3, ±7.5,

Step AM-Voice 8.33 kHz, 25 kHz or both 25 kHz page 18 Mic AM-Voice Active or Passive Passive page 18 Key priority AM-Voice,

Local PTT AM-Voice,

Remote PTT AM-Voice,

Remote phantom PTT

All Yes or No - page 14

All AM-Voice, AM-MSK, Mode

2 or Mode 3 STD or INV STD page 21

AM-MSK

-30 to +10 dBm -13 dBm page 17 and

AM-MSK

On or Off Off page 17 and

AM-MSK

On (key), Off (de-key) Off page 17 and

AM-MSK

2 to 510 s or Off 180 s page 17 and

AM-MSK

5 to 95% 85% page 17 and

AM-MSK

On or Off On

AM-MSK

±8 kHz

Local-Remote or

AM-MSK

AM-MSK AM-Voice,

AM-MSK

Remote-Local Enabled or D isabled Enabled page 18 and

Enabled or D isabled Enabled page 18 and

AM-Voice page 15

page 19

page 17

Off 0 (No offset) page 18

Local-Remote page 18 and

page 19

T6T VHF 100 W Transmitter Page 16 Operation

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AM-Voice Settings Procedure

During this procedure, the following parameters, applicable to AM-Voice operation, can be set:

❑ RF power output ❑ Audio line input level ❑ Inhibit ❑ PTT on (key) or off (de-key) ❑ Transmitter time out ❑ Modulation depth ❑ Mute (on or off) ❑ VOGAD (on or off) ❑ Antenna c/o delay (on or off) ❑ Offset ❑ Step ❑ Mic ❑ Key priority (local or remote) ❑ Enable or disable local PTT ❑ Enable or disable remote PTT ❑ Enable or disable remote phantom PTT.

AM-Voice Mode Settings Screen

The AM-Voice mode setti ng screen is accessed from the Settings screen. Use the Scroll/Se lect switch to select the parameter, then enter the required setting(s).

Adjustments

P o w e r 1 0 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 10 W to 100 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 100 W Transmitter Page 17 Operation

Adjustments

Back to Transmitter Main Page

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, ±4, ±5, ±7.3, ±7.5, ± 8 kHz. 25 kHz, 8.33 kHz or both. Active or Passive.

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

Enabled or Disabled. Return to Settings screen.

T6T VHF 100 W Transmitter Page 18 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 remote) ❑ Enable or disable local PTT ❑ Enable or disable remote PTT ❑ Enable or disable remote phantom PTT.

AM-MSK Mode Settings Screens

The AM-MSK mode setting screen is accessed from the Settings screen. Use the Scroll/Select switch to select the parameter, then enter the required setting(s).

P o w e r 1 0 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 10 W to 100 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 100 W Transmitter Page 19 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 100 W Transmitter Page 20 Operation

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Polarities Screens AM-Voice and AM-MSK

A number of remote in dic ati on and c ontrol s ig nals can be hardwire co nne cted to the transmitter. Thes e signals include a transmitter ready indication, a PTT control signal, a phantom PTT control signal, a PTT out indication, a tran smitter inhibi t control signal, a n E-BIT input, a BI T test initiation c ontrol signal, an external VSWR fault indication and antenna C/O. The following paragraphs detail the signals applicable to the operational mode of the transmitter.

The Polarities screen is accessed from the Settings screen.

AM-Voice and AM-MSK Polarity Settings

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

The signal connections are shown in Table 6 along with the conditions when STD or INV is selected. The settings for the PTT Reference voltage are also shown in Table 6.

R e a d y O u t S T D E - 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 < <

T6T VHF 100 W Transmitter Page 21 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 Facilities, pin 13 An open collector grounded

output when the radio is ready to transmit and no BIT faults are detect ed.

E-BIT In Facilities, pin 2 TTL input. 0 V indicates an

external 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 (Phan PTT In)

MARC or MARC Audio, pin 2

Active when input differs from reference by more than 10 V. Inactive when input dif fers from reference by less than 1 V. Maximum input level ±60 V with respect to referen ce. Inpu t will draw no more than 6 mA, requires at least 1 mA to operate.

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

TTL input. 5 V indicates an external fault.

TTL input. 5 V inhibits transmitter operation.

TTL input. 5 V initiates an interruptive BIT test.

Active when input differs from reference by less than 1 V. Inactive when inpu t diff ers from reference by more than 10 V. Maximum input level ±60 V with respect to reference. Inp ut will draw no more than 6 mA, requires at least 1 mA to operate.

Active when input differs from reference by less than 1 V. Inactive when inpu t diff ers from reference by more than 10 V. Maximum input level +60 V with respect to reference. Inp ut will draw no more than 6 mA, requires at least 1 mA to operate.

PTT Out Facilities, pin 3 Grounding solid state relay.

+60 to -60 V, ac or dc, 100 mA max, n/o. Activated 20 ms (±1 ms) before the start of the power ramp up to allow for the antenna relay to pull-in time.

External VSWR Input

(Ext VSWR In) Antenna

Changeover (Ant c/o out)

T6T VHF 100 W Transmitter Page 22 Operation

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

Facilities, pin 5 (Common pin 6)

Solid state relay. +60 to -60V, ac or dc, 100 mA max, n/o. Activated 35 ms (± 1 ms) before the start of the power ramp up to allow for the antenna relay pull-in time.

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

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.

Continued >>

Back to Transmitter Main Page

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

Signal Connector Polarity set to STD Polarity set to INV

Fast PTT Output (antenna change-over)

PTT Ref - PTT Ref can be set to +14 V,

MARC Audio, pin 3 Open collector NPN transistor

grounding output, 200 mA max, n/o.

0 V or -14 V. PTT. Maximum input level ±60 V with respect to PTT reference. Input will draw no more than 6 mA, and requires at least 1 mA to operate.

When the input PTT signal and the PTT reference dif fer by more than 10 V the radio keys.

When the input PTT signal and the PTT reference are within 1 V, the radio dekeys.

Other conditions are indeterminable.

Open collector NPN transistor grounding output, 2 00 mA max, n/c.

PTT Ref can be set to +14 V, 0 V or -14 V. PTT. Maximum input level ±60 V with respect to PTT reference. Input will draw no more than 6 mA, and requires at least 1 mA to operate.

When the input PTT signal an d the PTT reference differ by more than 10 V the radio dekeys.

When the input PTT signal an d the PTT reference are within 1 V, the radio keys.

Other conditions are indeterminable.

T6T VHF 100 W Transmitter Page 23 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 polar ity settings applicable to Mode 2 an d Mode 3 can be s et to t he def ault ST D (standard) setting or INV (inverted).

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

B a c k E x i 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 the r adio is ready to transmit and no BIT faults are detected.

An open collector high impedance output whe n the radio is ready to transmit and no BIT faults are detected.

E-BIT In Facilities, pin 2 TTL input. 0 V indicates an

external fault.

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 100 W Transmitter Page 24 Operation

AM-Voice and AM-MSK BIT Screen

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

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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 initiate BIT 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 100 W Transmitter Page 25 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 100 W Transmitter Page 26 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 100 W Transmitter Page 27 Operation

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

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

Active or Inactive. Active or Inactive.

Software Configuration Screens

Software configuration screens are as follows:

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T 6 V H F 1 0 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 < < > >

The first screen defines the radio.

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 100 W Transmitter Page 28 Operation

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

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 ]

Back to Transmitter Main Page

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

T6T VHF 100 W Transmitter Page 29 Operation

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Band Edges

The frequency range of the T6 100 W tr ansmitter i s 118 to 136.975 MHz. If required , transmiss ion can be limited to either one or two smaller par ts of the frequency band by setting the band edge s, BE1 to BE4. Transmission is possible between BE1 and BE2 frequencies, and between BE3 and BE4 frequencies.

B E 1 1 1 8 . 0 0 0 M H z B E 2 1 3 6 . 9 7 5 M H z B E 3 1 1 8 . 0 0 0 M H z E x i t > >

The Band Edge screen is accessed from the Control screen.

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

If the transmitter is required to operate ove r 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 Settings

B63100HS/NB set so that the full frequency range can be transmitted.

Example: Transmitter set to transmit only those frequencies in the range 120 to 130MHz.

Example: Transmitter set to transmit only 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

120.000 130.000 120.000 130.000

120.000 125.000 130.000 135.000

T6T VHF 100 W Transmitter Page 30 Operation

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BIT Status Warning Screens

The following shows some example BIT screens. These screens alternate with the Main screen when an alert or alarm conditi on is present. Only the par ameters caus ing the a lert o r alarm a re disp layed , and if both an alert and alarm condition exists simultaneously only the alarm information is displayed. If multiple parameters are si gnalling an alert or alar m condition, multiple scr eens are used to display th e 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

Alert:

There is no RF power reduction. The Alarm indicator is flashing.

Alert:

The RF output power is reduced between 1 and 3 dB. The Alarm indicator is flashing.

Alert:

The RF output power is reduced between 1 and 3 dB. The Alarm indicator flashing

Alarm:

The RF output power reduced by more than 3 dB. The Alarm indicator is lit.

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 100 W Transmitter Page 31 Operation

Alarm:

The RF output power is shu t down. The Alarm indicator is lit.

Alarm:

The RF output power is shu t down. The Alarm indicator is lit.

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 inhibi t on or off

Panel

  

  

  

  

  

VFP MARC T6

Controller

T1/E1 HDLC Default Setting

118.000 MHz

AM-Voice

100 W

-13 dBm

Off

PTT test facility 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 offset (AM-Voice only)

Set frequency step size (AM-Voice only)



View state



  

  

  

  

Off

180 s

85%

AM-Voice - On

AM-MSK - Off

0 (No offset)

25 kHz

Continued >>

T6T VHF 100 W Transmitter Page 32 Operation

Table 9 Functions and Parameters (Continued)

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Function Front

Set microphone type (active or passive) (AM-Voice 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

  

  

VFP MARC T6

Controller

T1/E1 HDLC Default Setting

Passive

Local-Remote

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



13/256

135

4D4B

19787

STD

Continued >>

T6T VHF 100 W Transmitter Page 33 Operation

Table 9 Functions and Parameters (Continued)

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Function Front

Set PTT reference voltage (AM modes only)

Set PTT output polarity (AM modes only)

Set fast PTT antenna changeover output polarity (AM modes only)

Set antenna change-over output polarity (AM modes only)

Set external VSWR input polarity (All modes)

Set inhibit input polarity (AM modes only)

Panel

VFP MARC T6



View state

Controller

T1/E1 HDLC Default Setting



+14 V

STD

BIT interruptive test input polarity (AM modes only)

E-bit input polarity (All modes)

Band Edges

Set band edges

Reference Frequency

Adjust transmitter’s reference frequency

LCD Backlight

Adjust LCD backlight



View state



  

STD (active low)

118.000 and 136.975 MHz

30 s

Continued >>

BIT

T6T VHF 100 W Transmitter Page 34 Operation

Table 9 Functions and Parameters (Continued)

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Function Front

Initiate BIT interrup tive test

STANDBY

Enter and exit standby facility

SOFTWARE CONFIGURATION

View the transmitter’s software configuration

LOCK FACILITIES

Front panel lock

MARC lock

T1/E1 lock

HDLC lock

Panel

  

  

  

VFP MARC T6

Controller

T1/E1 HDLC Default Setting

Not in Standby

Off

T6T VHF 100 W Transmitter Page 35 Operation

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Intentionally Blank

Installation

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This topic gives the information required to install a T6T VHF 100 W Multimode Transmitter.

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Warnings and Cautions

WARNING Dangerous Voltages

The instructions given in this topic involve connecting dangerous voltages to the transmitter and should be carried out only by suitably qualified personnel.

WARNING Dangerous Voltages

The equipment is permanently connected to the mains supply when the mains connector is attached. Switchin g the rear panel Power switch to off does not is olate all internal c ircuits from the mains supply. For this reason, a mains isolating switch should be fitted close to, and easily accessible from, the transmitter's position. The isolation switch should isola te 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 personnel.

Caution

The T6T transmitter's circu itry co ntains E lectro static S ensitive Devices (E SSDs). P ersonne l must be aware of the precautions necessary to prevent damage to such devices. During installation all precautions necessary to prevent ESSD damage must be taken.

Caution Unauthorized Modifications

Changes or modifications made to this equipment that are not expressly approved by Park Air, o r parties authorized by Park Air, cou ld void the user’s authority to o perate the equipment.

Antenna Radiation

ESSDs

T6T VHF 100 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 page2. 2 Perform an i nit ial ins pe cti on o f the tr ans mitte r and f it th e co rrec t ac input fuse. page 9 3 Fit the transmitter into an equipment cabinet. page 9 4 Make external signal connections. See Fig 1 to Fig 5 to determine which

external connections are required for the particular configuration. 5 Connect the chassis stud to the cabinet or system earth. page 22 6 Connect the antenna. page 22 7 Connect the dc input suppl y (if required). page 22 8 Connect the ac input suppl y (if required). 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 Type Park Air Part Number

Fuses:

AC input fuses, F3, F4 for 110/120 V input AC input fuses, F3, F4 for 220/230 V input

DC input fuses, F1, F2 15A size 0 29-01350201

Connectors:

AC supply connectors IEC 20-02030102

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

29C11120102S 29E01120108S

DC supply connectors XLR 3-pin 20-01030106 Antenna connector N-type plug 19-01030301 MARC connector 9-way D-type plug Plug: 20-01090100

Cover: 20-09090101 MARC audio RJ48 plug 20K01080100 MARC data RJ48 plug 20K01080100 Facilities connector 15-way D-type plug Plug: 20-01150100

Cover: 20-09150101 HDLC connector RJ48 plug 20K01080100 T1/E1 connector RJ48 plug 20K01080100 Reference connector SMB connector 19C01050300 Microphone/Diagnostics connector 7-pin DIN plug 20-01070101

T6T VHF 100 W Transmitter Page 3 Installation

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Configuration

Connection of external equipment depends on the configuration required. Possible configurations are:

❑ T6T transmitter configured for local operation (see Fig 1). ❑ T6T transmitter configured for remote operation (see Fig 2). ❑ T6T transmitter configured for use with MARC (see Fig 3). ❑ T6T Mode 2 configuration (see Fig 4). ❑ T6T Mode 3 configuration. (see Fig 5).

T6T Transmitter

Optional Facilities that

can be used if required

E-BIT input

PTT relay out put

External VS WR input

dc supply output

Inhibit input

BIT interruptive test input

Antenna change-over 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 operation, the transmitter is operated from the front panel using a microphone/headset. Any of the optional facilities may be connected.

Fig 1 T6T Transmitter Configured for Local Operation

T6T VHF 100 W Transmitter Page 4 Installation

T6T Transmitter

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Optional Facilities that

can be used if required

E-BIT input

PTT relay output

External VSWR input

dc supply output

Inhibit input

BIT interruptive test input

Antenna change-over output

Ready output

Tape output

Audio

PTT

MARC Connector or, MARC Audio Connector

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, or alte rnatively o n the MAR C Audio c onnector. If data i s required by a com patible d ata system , the RS422 data lines terminate on the MARC connector, or alternatively on the MARC Data connector. Any of the optional facilities may be connected.

Fig 2 T6T Transmitter Configured for Remote Operation

T6T VHF 100 W Transmitter Page 5 Installation

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RSE2

Equipment Connector

Optional Facilities that

can be used if required

PTT relay output

External VSWR input

Unregulated supply ou tp ut

BIT interruptive test input

Antenna change-o v er output

dc supply ou t put

RS422 data

E-BIT input

Inhibit input

Ready outp ut

Tape output

Audio

PTT

Frequency Counter

required only for

maintenance

MARC Connector

Facilities Connector

Reference Connector

T6T Transmitter

Antenna

Connector

Microphone/Diagnostics

Connector

Mic/Headset for engineering use

Laptop (or PC) required

only for maintenance

When using a T6T transmitter with a MARC Remote Site Equipment (RSE2) the transmitter MARC connector is pin-to-pin wired to one of the RSE2 Equipment connectors. Any of the optional facilities may be connected.

Fig 3 T6T Transmitter Configured for use with MARC

T6T VHF 100 W Transmitter Page 6 Installation

T6T Transmitter

Reference Connector

Microphone/Diagnostics Connector

Antenna

Connector

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Mode 2

Network Computer

HDLC

Connector

Control and data

T6R Receiver

Reference Connector

Headset/Diagnostics 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

Connects to the

Reference connector

Frequency Counter

Connects to the

Microphone/Diagnostics

connector

Laptop (or PC) required

only for maintenance

required only for

maintenance

Fig 4 T6T Transmitter Mode 2 Configuration

T6T VHF 100 W Transmitter Page 7 Installation

T6T Transmitter

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Antenna

Connector

Mode 3

Network Computer

T1/E1

Connector

Control and data

Frequency Counte r

required only for

maintenance

Reference Connector

Microphone/Diagnostics Connector

Fig 5 T6T Transmitter Mode 3 Configuration

Laptop (or PC) required

only for maintenance

T6T VHF 100 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 Documentation CD (part number 31-36T62VCD) is normally supplied with the transmitter. This CD includes the VFP software.

Fitting the Correct AC Input Fuses

The mains input fuses, F3 and F4, are an integra l part of the rear panel ac con nectors. The fuse type must be correct for the local mains supply as detailed below.

Earth

Line

For a mains input in the range 110 to 120 Vac, fuses F3 and F4 should be rated T4A, 125V, UL.

Neutral

For a mains input in the range 220 to 230 Vac, fuses F3 and F4 should be rated T4A, 250V, IEC.

Holder for spare fuse (not supplied)

F3 and F4

FS2 Spare Fuse

Fitting a Radio into an Equipment Cabinet

Caution Mechanical Support

It is essential that the chosen mechanical installation provides adequa te support along the depth (front to rear) of the unit. The transmitter must not be supported by the front panel; doing so can cause damage.

The transmitter ca n be installed on telescopic slides, or on fixed run ners, within a standard 483 mm (19 inch) equipment cabinet. M4 tapped holes, each 10 mm deep (see Fig 6) are provided on each side of the equipment to accept the slides. Details of suitable telescopic slides and fixed runners are available from Park Air.

When fitted in the cabinet, the transmitter 's front panel must be s ecured to the cabinet’s chassis usi ng four M6 x 16 mm screws and plastic washers.

T6T VHF 100 W Transmitter Page 9 Installation

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Description

Item

Transmitter

Inner Slide

M4 Wavy Washer

M4 x 8 mm Half Head Bolt

Fig 6 Slide Fittings

Make External Signal Connections

Making the external si gn al c onn ec tio ns i nv olv es co nfi guri ng the t rans mitter to suit its operati ona l mod e. Illustrations showing various configurations are shown in Fig 1 to Fig 5; these figures should be used only as a guide.

Front Panel Connectors

The front panel has two connectors; Microphone/Diagnostics and Reference connectors. These are illustrated in Fig 7.

Fig 7 Front Panel

T6T VHF 100 W Transmitter Page 10 Installation

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Microphone/Diagnostics Connector

The Microphone/Diagnostics connector is a self-locking 7-way DIN socket used for connecting a microphone, microphone/headset or PC. The connector pin-out is detailed in Table 3.

Pin-out of the Microphone/Diagnostics connector looking into the mating face of the chassis mounted socket.

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

Table 3 Microphone/Diagnostics Connector

Pin Number Signal Characteristic Usage

1 Microphone ground 0 V. Microphone/Headse t 2 Transmit data RS232. 115200 baud, 8 data bits, 1 stop bit,

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

no parity, no handshaking. 5 Sidetone – Microphone/Headset 6 Microphone input To ensure correct VOGAD operation, the

following microphone input levels are

required:

Passive setting: between 2 and 35 mV

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

Microphone/Headset

Reference Connector

The Reference connec tor is an SMB plug used to moni tor the radio’s referen ce frequency. It mo nitors the frequency at a level of 100 mV (±50 mV) with less than -10 dBc harmonics.

T6T VHF 100 W Transmitter Page 11 Installation

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Rear Panel Connectors

The rear panel c onnec tors a re shown in Fig 8 and list ed in Table 4. Select which conn ectors are g oing to be used and then make connections as required.

Table 4 Rear Panel Connector Usage

Connector Type Usage

AC supply 2 x IEC Terminating the ac input supply. DC supply 2 x XLR 3-pin Terminating the dc input supply. Antenna N-type Terminating the antenna feeder coaxial cable. External speaker 3.5 mm stereo jack Connects an external loudspeaker for monitoring sidetone. MARC 9-way D-type Used to connect to a MARC remote site equipment.

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

MARC audio RJ48 Used as an alternativ e to the MARC conn ector fo r termin ating

remote audio and PTT signals.

MARC data RJ48 Used as an alternative to the MARC connec tor for term inati 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 for connecting to a digital voice and data network.

HLDC RJ48 Used to connect to a Mode 2 network computer.

DANGER HIGH RF VOLTAGES CONNECT BEFORE

USE

DANGER HIGH RF VOLTAGES CONNECT BEFORE

USE

T1 / E1 HDLC

MARC DATA

DANGER HIGH RF VOLTAGES

CONNECT

ANTENNA BEFORE USE

ANTENNA

MARC AUDIO

MARC

AC SUPPLY

48-62Hz

POWER 800VA max

DC SUPPLY

21.6-32V 28 A

SEE INSTALLATION INSTRUCTIONS BEFORE

DISCONNECT SUPPLIES WHEN NOT IN USE

RATINGS

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

CONNECTING SUPPLIES

FUSE F3 / F4

FUSE F1 / F2

F15A 32V

SUPPLY

FACILITI ES

~ AC SUPPLIES

DC SUPPLIES

FUSE F1

FUSE F2

FUSE F4FUSE F3

Fig 8 Rear Panel (Connectors)

T6T VHF 100 W Transmitter Page 12 Installation

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MARC Connector

The MARC connector i s a 9-way D-type soc ket us ed to co nnect the tran smitt er to a M ARC remote site equipment, or it can also be used for normal remote operation.

As an alternative to using this connector , the RJ48 st yle MARC Audio and MARC Data connec tors 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 co nnect or look ing i nto the mating f ace o f the chassis mounted socket.

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

Table 5 MARC Connector

Pin Number Signal Characteristic

1Ground 0V. 2

4 PTT input 5 Output supply This output is between 21.6 and 32 Vdc (nominally

6 7

8 9

Audio line in (+) Audio line in (-)

Data in (+) Data in (-)

Data out (+) Data out (-)

Balanced 6 00 ohm, -20 to +20 dBm.

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

Remote PTT signal input. 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 li ne level w ill be 10 dB above th e line leve l setting. Se e the infor mation supp lied under the heading ‘Line Level Setting’ in Operation.

T6T VHF 100 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 used as an alternative to the MARC connector for audio and PTT connections. The connector pin-out is shown below and detailed in Table 6.

Numbering is shown looking from the top of the connector.

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

1 2

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 (-) Audio line in (+)

change-over/PTT (output)

Balanced 600 ohm, -20 to +20 dBm. Phantom keying can be superimposed on the audio

lines. See Fig 10. Open collector NPN transistor 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 Setting’ in Operation.

T6T VHF 100 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 operat e.

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 keying potential, V

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

PTT

T6T Transmi t 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 instead 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 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 keying potential, V

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

PTT

T6T Transmitter

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 100 W Transmitter Page 15 Installation

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MARC Data Connector

The MARC Data co nnector is an 8-way RJ48 soc ket. It can be used as an alt ernative 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.

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

Data in (-) Data in (+)

Data out (+) Data out (-)

RS422 differential asynchronous data, 9600 baud, 8 data bits, 1 stop bit, no parity, no handshaking.

Note: Rear panel switch must be in the ON position for this function to operate.

28 V) fused at 500 mA.

T6T VHF 100 W Transmitter Page 16 Installation

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T1/E1 Connector

The T1/E1 connector is an 8- way RJ48 socket used for c onnecting 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 Mb its per second (±50 ppm), AMI/HDB3 Codi ng. 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 Mb its per second (±50 ppm), AMI/HDB3 Codi ng.

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

T6T VHF 100 W Transmitter Page 17 Installation

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HDLC Connector

The HDLC connector is an 8-way RJ48 socket used for connecting to a Mode 2 network computer. The connector pin-out is detailed in Table 9.

Numbering is shown looking from the top of the connector.

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) 7Ground 0 V. 8 Output supply This output is between 21.6 and 32 Vdc (nominally 28 V) fused at

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

Pair to pin 3.

500 mA.

T6T VHF 100 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 directly to Tip. Sleeve Ground 0 V.

T6T VHF 100 W Transmitter Page 19 Installation

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Facilities Connector

The Facilities conne cto r is a 15 -way D-type fi ltered s ocket used fo r connec ting t o assoc iated pa rts o f 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 detailed in Table2 on page 3.

Table 11 Facilities Connector

Pin Number Signal Characteristic

1Ground 0V. 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 message is displayed on the display . The input is TTL having a 4.7 kohm pull-up resistor to 5V. The input is configurable from the front panel to be active high or low.

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

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

4 External VSWR input Used to indicate an external VSWR fault . TTL inp ut with 4.7 kohm pull -

up to 5 V. Configurable active high or low.

7 Not used 8Ground 0 V. 9 Output supply This output is between 21.6 and 32 Vdc (nominally 28 V) fus ed at

10 Inhibit (input) Active signal prevents the transmitter keying. TTL with 4.7 kohm pull-

11 BIT interruptive test

12 Not used 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 change-over (output)

Antenna change-over common (output)

(input)

Solid state relay 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 grounding output, 200 mA max, configurable n/o or n/c.

output into 600 ohm for 90% modulation depth.

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

T6T VHF 100 W Transmitter Page 20 Installation

T6T Transmitter

(Main)

Facilities

Connector

Antenna

T6T Transmitter

(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 Change-over Output configured to control the antenna switching between main and standby transmitters. The potential on Facilities connector pin 6 is switched through to pin 5 when the standby transmitter is keyed; in this example, pin 6 is linked to ground. This energizes the Main/Standby Transmit Relay to route the standby transmitter to the antenna.

Other Configurations

The antenna change-over output can be configured in other ways to suit the user’s requirement subject to:

❑ Pin 6 can be any potential between -60 and +60 Vac, or dc. ❑ The maximum current drawn must not exceed 100 mA. ❑ The output at pin 5 is configurable normally open or normally closed from the Polarities screen. ❑ The internal solid state switch activates 35 ms before the start of the power ramp to allow for the antenna

relay pull-in time.

Fig 11 Example: Using the Antenna Change-over Output

T6T VHF 100 W Transmitter Page 21 Installation

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Chassis Stud Connection

WARNING Chassis Earth

A chassis stud is fitted to the transmitter's rear panel. This stud is used to connect the equipment to the equipment cabinet, or to the user's system earth point. The stud must not be used as the safety earth.

In order not to compromise the transmitter’s Electromagnetic Compatibility (EMC) the chassis stud, marked and fitted to the rear panel must be connected to the equipment cabinet (if a cabinet is being used) or to the user's system earth point. The connection should be made using a single tri-rated, greenand-yellow ca ble having a cross-section al area of 2.5 mm

. The cable shou ld 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 operate s from e ither an ac, or a dc i nput su pply. W hen both ac and dc are connecte d, operation from the ac supply takes priority; automat ic change-over to the dc supp ly occurs if the ac supply fails. On restoration of the ac supply, the equipment reverts to ac operation.

The dc input supply conne ctors (see Fig 12) are fitted to the transm itter rear pane l. The recomm ended minimum rating of the dc supply cables is: 2-core having a cross-sectional area of 1.5 mm supply cables should be fitted with XLR 3-pin connectors (Park Air part number 20-01030106).

Positive Negative

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

Not used

Fig 12 DC Connectors

per core. The

T6T VHF 100 W Transmitter Page 22 Installation

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Connect the AC Input Supply

WARNING Dangerous Voltages

The equipment is permanently connected to the mains supply when the mains connector is attached. Switching the rear pa nel Power switch to off does not isolate all internal circuits from the mains supply. For this reason, a mains isolating switch should be fitted close to, and easily accessible from, the transmitter's position. The isolation switch should isolate both live and neutral supplies, be clearly labelled, and adequately rated to protect the equipment.

WARNING Earth Connection

This equipment must be earthed. The earth terminal of the ac connector should be used as the safety earth.

Two ac input connectors are fitted to the transmitter rear panel. The cables used to connect between the equipment and the ac power source should be 3-core (to IEC 227) rated 250 Vac at 8 amps, and have a minimum cross-s ectio nal a rea o f 1.0 mm (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 the use of polyvi nyl chlori de

❑ If PVC insulated, be not li ghter than ordinary po lyvinyl c hlorid e sheathed fl exible cor d accordi ng

to IEC publication 227 (designation H05 VV-F, or H05 VVH2-F).

❑ If rubber insulated, be of synthetic rubber and n ot lighter than ordinary toug h rubber-sheathed

flexible cord accor ding to IEC pu blication 24 5 titled ‘Rub ber Insulate d Cables of Ra ted Voltage s up to and Including 450/750 V (designation H05 RR-F)’.

The T6T 100 W transm itter is a Class 1 equipment. The ac supply cables should have a green-andyellow protective earthing conductor electrically connected to the protective earthing terminal of the equipment connector and the ma ins p lug. P ark Ai r rec ommend s the ac supp ly c able is colo ur c oded 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 le tter 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.

F3 and F4

FS2 Spare Fuse

T6T VHF 100 W Transmitter Page 23 Installation

Switching On

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WARNING

Dangerous Voltages

When installatio n is complete, the transmitter should be sw itched on at the rear panel 2-way rocker Power switch. The Power swit ch is used to sw itc h on, and swi tch off, power to the tr ans mitte r's circ uitr y 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 successfull y com p le ted the tr an sm itt er must be set up using the front panel controls or the VFP.

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

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

T6T VHF 100 W Transmitter Page 24 Installation

Maintenance

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This topic gives scheduled maintenance procedures, details module replacement, and

describes how to use the Virtual Front Panel (VFP).

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Introduction

This section gives the scheduled and unscheduled maintenance procedures for the T6T 100 W transmitter and shows how to use the Virtual Front Panel (VFP).

Scheduled Maintenance A scheduled maintenance procedure is given on page 3. Park Air

recommends that this task be completed every twelve months.

Unscheduled Maintenance Normally, the T6 tran smitt er is con sidere d a Li ne Re place able Un it

(LRU) and should be replaced with a serviceable spare if a fault occurs. The faulty transmitter should then be returned to Park Air for repair.

In certain circumstances, Park Air Customer Support may suggest that the user change one of the transmitter modules. Dismantling and assembly instructions are therefore given under the heading Unscheduled Maintenance starting on page 7.

Using the VFP Operating parameters can be set from the transmitter front panel,

or by using the VFP. Some additional functions are available from the VFP. See page 22.

Configuration

T6 radios are configured in respect of hardware and software.

Hardware Configuration

The radio’s hardware configuration is identified by the modification leve l. A modificatio n label is fitted to the radio’s rear panel showing the model of radio, the radio’s part number and the radio’s serial number.

The modification (Mod) record shows the configuration status. In the example shown, the radio is at Mod strike 8.

Software Configuration

A white label fitted to the top cover lists the radio’s software configuration.

In this example there are three fills: AM-Voice, Mode 2 and Mode 3.

Part Order No. B63100HS/NB Software Mode Part No. Fill 1 AM_VOICE 65-00000465 Fill 2 2 65-00000466 Fill 3 3 65-00000467 Fill 4

Software Configuration

T6T100 B63100HS/NB 2K1234

Modification Label

2K1234

Software Configuration Label

Replacement Modules

To ensure compatibi li ty when r epl acing a radio or a module , th e c onfi gu ra tio n s hou ld be t he s am e ( see the previous headings: Hardware and Software Configuration).

Spare modules received from Park Air are supplied with a Spares Instruction that details the configuration of the module and any special instructions. If in any doubt regarding the suitability of spare modules contact Park Air Customer Support.

T6T VHF 100 W Transmitter Page 2 Maintenance

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Scheduled Maintenance

Park Air recommends that scheduled maintenance is carried out at twelve-monthly intervals. Scheduled maintenance comprises the following checks:

Number Check Tools/Test Equipment Required

1 Ensure the equipment is clean and that external

connectors are securely fitted .

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

internal frequency reference. 3 Perform a BIT interruptive test. 4 Perform an ac and dc change-over check (if both

supplies are connected).

Camel hair brush/clean lint-free cloths

VHF frequency counter

Cleaning and Checking Security of Connectors

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

Setting the Transmitter Internal Reference Frequency

To set the transmitter internal reference frequency, use the following procedure. Note that references to the switch in the procedure mean the Scroll/Select switch.

(1) Ensure the transmitter does not have

an offset.

(2) Connect a frequency counter to the

front panel Reference connector.

(3) From the Main screen, press the swi tch

to display the Contro l screen. Tur n 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 select ed turn the switch

clockwise or anti-clockwise until the frequency counter reads

20.950000 MHz ±10 Hz, then press the

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 < < > >

Settings Screen

switch.

(6) Turn the switch clockwise until Exit is highlighted, then press the switch. You are returned to the

Main screen.

(7) Disconnect the frequency counter.

T6T VHF 100 W Transmitter Page 3 Maintenance

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(8) If not using 5-carrier offset, refer to AM-Voice Mode Settings Screen in the Operation section of

this document and set to the required offset.

(9) If 5-carrier offset is required, restore the carrier offset using the following routine:

❑ Connect a 50 ohm frequ ency counter, through a 60 dB a ttenuator, to the transmitter rear

panel Antenna connector (see Fig 5 for location of the Antenna connector)

❑ Refer to AM-Voice Mode Settin gs Sc reen in the Operati on sectio n of this do cumen t and set

the desired 5-carrier offset

❑ Refer to Changing the Transmitter Operating Frequency in the Operation section and set the

transmitter to the nea rest 2 5 k Hz ch ann el f re que ncy . Fo r e xa mpl e, if the required frequency is 124.504 (+4 kHz offset), set the transmitter to 124.500 MHz

❑ Key the transmitter a nd adjust the reference freque ncy, using the front pan el Scroll/Select

switch, until the frequency cou nter displays the required operating frequ ency. For exa mple

124.504 MHz

❑ When the frequency counter dis plays the ex act operati ng freque ncy, press the Scroll /Selec t

switch and stop keying the transmitter

❑ Disconnect the test equipment and reconnect the antenna.

T6T VHF 100 W Transmitter Page 4 Maintenance

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To Initiate a BIT Test

An interruptive BIT test cannot be initiated in Mode 2 or Mode 3.

During an interruptive BI T test, the transmi tter rad iates mod ulated car rie r 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.

(1) From the Main screen, pres s th e s witc h t o

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 Ini tiate 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 s creen

is displayed. Selecting OK takes the user 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 t hrough 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

T6T VHF 100 W Transmitter Page 5 Maintenance

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AC and DC Change-over Check

If both ac and dc input supplies are connected to the transmitter, carry out the following check:

(1) Confirm that both ac and dc supplies are connected to the transmitter. Ensure that the rear panel

Power switch is set to the I (on) position.

(2) Confirm that the front pane l Ready in dicator is lit , the LCD is i lluminated, an d the transmi tter is

operational. (3) Switch off the ac supply from its source. (4) Check that the trans mitter continues to opera te correctly from the dc s upply. If accessed, the

front panel BIT screen w ill show AC Suppl y as off, and DC Suppl y as on. The value of the dc

supply is also shown.

T6T VHF 100 W Transmitter Page 6 Maintenance

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Unscheduled Maintenance

WARNING Dangerous Voltages

The instructions given in this section involve connecting dangerous voltages to the transmitter. Maintenance should be carried out only by suitably qualified personnel.

When an ac supply is connected, dangerous voltages are present within the transmitter. Care must be taken by personnel to avoid accidental contact with exposed circuitry during maintenance or alignment procedures.

When the Power switch is set to the Standby position, dangerous voltages are still present in the transmitter's internal power supply circuitry. To ensure safe working, the ac and dc input supplies must be disconnected from the transmitter.

WARNING

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 circuitry contains Electrostatic Sensitive Devices (ESSDs). Personnel must be aware of the precautions necessary to prevent damage to such devices.

Caution Unauthorized Modifications

Changes or modifications made to this equipment that are not expressly approved by Park Air, or parties authorized by Park Air, could void the user’s authority t o operate the equipment.

Caution Repairs

When carrying out repairs to the PA module, care must be taken not to damage the gasket. If the strips become damaged, they must be replaced. Failure to comply with this instruction may compromise the transmitter Electromagnetic Compatibility (EMC) and breach European Commission regulations.

Antenna Radiation

ESSDs

When screws are inser ted into t he trans mitter P A cas ting care mu st be tak en not to exceed a torque of 6 Ibs/inch when tightening. This applies when replacing the top and bottom covers and during the refitting of the PA modules.

T6T VHF 100 W Transmitter Page 7 Maintenance

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Introduction

This document provide s the user with detailed instruc tio ns on the r emo va l and rep la cem ent of modu le s and assemblies. When r emoving or refitting modules , observe antistatic handl ing precautions. Do not change any potentiom eter (or link) setti ngs unless detaile d in these instruc tions. Potentiometers have been set using specialist equipment.

Molex KK Connectors

The transmitter uses the following Molex KK connectors:

❑ CN2 on the PA Control module ❑ CN7 and CN6 on the PSU Regulator module.

To remove KK type connectors:

❑ Free the locking mechanism on the connector by moving one side of the connector up, then move

the other side up (see the following diagram). The upward motion should only be as far as needed to free the locking mechanism

❑ DO NOT pull the cable to free the connector ❑ Note that KK type connec tors are designed to be removed in this ma nner 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 described in this section.

❑ 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 ❑ PC to Radio Interconnection Lead

(Park Air part number 17E12600001)

❑ SMB to BNC Lead for Ref erence Frequency

(Park Air part number 17K11000004)

T6T VHF 100 W Transmitter Page 8 Maintenance

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Top and Bottom Covers

One of the top cov er screws is covered wi th a warranty l abel that sh ould not be tampered with unless Park Air Customer Support has advised other wise. When authorisation has been made the followi ng procedures should be followed.

To remove the to p cov er, loca te and unsc rew t he 19 count ersu nk scr ews secu ring the to p cover to t he mainframe. Access can then be gained to the Processor module and PSU Regulation module.

To remove the bottom cover, locate and unscrew the 15 countersunk screws securing the bottom cover to the mainframe. Access can then be gained to the PA Control module.

The following modules require both top and bottom covers to be removed:

❑ Power Supply modules ❑ Combiner BIT module ❑ PA modules ❑ Front Panel assembly PCB.

Removing and Refitting the Processor Module

The Processor module is located as shown in Fig 5. A module removal diagram is shown in Fig 8.

WARNING Dangerous Voltages

Dangerous voltages are present within the transmitter. Care must be taken by personnel to avoid accidental contact with exposed circuitry when the covers are removed a nd power is applied to the radio.

Removal

Before attempting to rem ove the Pr ocesso r modu le, and i f possib le, save th e radio se ttings . Connec t a PC with the VFP software loaded to the radio using the PC to Radio Interconnection Lead (Park Air part number 17E12600001). With the VFP software active, upload the radio settings to a specified file.

Ensure that the transmitter is isolated from the ac and dc input supplies. Then proceed as follows:

(1) Unscrew the 19 countersunk screws and remove the transmitter top cover. (2) Locate the Processor module and disconnect the following connectors (Fig 8):

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

❑ CN3 14-way connector (14-way ribbon cable from PSU Regulator module CN4)

❑ CN4 34-way connector (34-way ribbon cable from Front Panel module CN1).

(3) Gain access to the rear of the transmitter. Using a 5 mm nut spinner tool, remove the four

screwloc 8 mm-4-40 UNC stud spacers that secu re the Proc ess or mo dule i nte rface conne ct ors

CN5 and CN6 to the rear panel. (4) Remove the seven M3 x 8 mm screws that secure the module to the transmitter mainframe. (5) Remove the module from the chassis.

T6T VHF 100 W Transmitter Page 9 Maintenance

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Refitting

To refit the Processor module, proceed as follows:

(1) Place the module in position. E nsu r e no wires ar e trappe d by the mod ule . Ens ur e ju mpe r J2 on

the module is set to ‘T’ for transmitter (see Fig 1).

JP2

Shown set for

transmitter

IC20IC19

IC21

TS7

C84

R/TR

IC25

IC27

IC38

T T

Fig 1 Processor Module JP2 Location

(2) Ensure the module interface connectors CN5 and CN6 are located correctly and are aligned with

the screw holes in the rear panel. Fit the four screwloc 8 mm-4-40 UNC screws and wavy

washers but leave them loose. (3) Fit the seven M3 x 8 mm screws that secure the module to the transmitter mainframe, but leave

them loose. (4) Using a 5 mm nut sp inner tool, tighten the four screwlo c 8 mm-4-40 UNC screws and wav y

washers that secure the connectors; then tighten the seven M3 x 8 mm screws that secure the

module to the transmitter mainframe. (5) Refit the following connectors to the module:

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

❑ CN3 14-way connector (14-way ribbon cable from PSU Regulator module CN4)

❑ CN4 34-way connector (34-way ribbon cable from Front Panel module CN1).

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

Interconnection Lead, Par k Air p art number 17E12 600001 (if not alrea dy con nected). Note that

any module sent from Park Air as a spare for a particular radio will be programmed with

compatible operat ing and F ill software. P ark Air k eeps recor ds of modu le softwar e in all rad ios

supplied. Care must be taken when using a module removed from another radio as this module

may not have compatible software. (10) Download the saved radio settings from file using t he VFP. Alternatively the setti ngs 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.

T6T VHF 100 W Transmitter Page 10 Maintenance

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(11) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure

To Calibrate the Transmitter on page 26.

(12) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (13) Set the transmitter internal reference frequency by carrying out the procedure detailed on

page 3.

(14) Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the

transmitter from the ac and/or dc supplies. (15) Refit the transmitter top cover. The transmitter can now be returned to service.

Removing and Refitting the PSU Regulator Module

The PSU Regulation module is located as shown in Fig 5. A module remov al di ag ra m is sh o wn i n Fig 9.

WARNING Dangerous Voltages

Removal

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

(1) Unscrew the 19 countersunk screws and remove the transmitter top cover. (2) Locate the PSU Regulation module and remove the three M3 x 8 mm captive washer screws that

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

❑ CN5 10-way connector (10-way ribbon cable to PA Control module CN6)

❑ CN6 6-way connector (6-way loom to Combiner BIT module CN12)

❑ CN4 14-way connector (14-way ribbon cable to Processor module CN3)

❑ CN3 3-way connector (part of loom to Combiner BIT module CN7)

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

❑ CN2 2-way connector (part of loom to Combiner BIT module CN7)

❑ CN1 4-way connector (part of loom to Combiner BIT module CN7)

(5) Remove the module from the chassis.

T6T VHF 100 W Transmitter Page 11 Maintenance

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Refitting

To refit the PSU Regulator module, proceed as follows:

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

❑ CN1 4-way connector (part of loom to Combiner BIT module CN7)

❑ CN2 2-way connector (part of loom to Combiner BIT module CN7)

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

❑ CN3 3-way connector (part of loom to Combiner BIT module CN7)

❑ CN4 14-way connector (14-way ribbon cable to Processor module CN3)

❑ CN6 6-way connector (6-way loom to Combiner BIT module CN12)

❑ CN5 10-way connector (10-way ribbon cable to PA Control module CN6).

(2) Locate the module in position. Ensure no wires are trapped by the module. (3) Secure the module to the transmitter mainframe using the t hree M3 x 8 mm captive washer

screws removed during disassembly. (4) Re-establish the ac and/or dc supplies. (5) Switch power on at the radio using the rear mounted Power switch. (6) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. (7) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (8) Set the rear panel Power switch to Standby. Isolate the transmitter from the ac and/or dc

supplies. (9) Refit the transmitter top cover. The transmitter can now be returned to service.

T6T VHF 100 W Transmitter Page 12 Maintenance

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Removing and Refitting the PA Control Module

The PA Control module is located as shown in Fig 5. A module removal diagram is shown in Fig 10.

WARNING Dangerous Voltages

Removal

Before attempting to r emove the PA Contro l modu le, ens ure that th e tran smitte r is is olated from t he ac and dc input supplies. Then proceed as follows:

(1) Unscrew the 15 countersunk screws and remove the transmitter bottom cover. (2) Locate the PA Control module and disconnect the following connectors:

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

❑ CN6 10-way connector (10-way ribbon cable from PSU Regulator module CN5)

❑ CN5 SMB connector (reference frequency from front panel)

❑ CN3 SMB connector (RF drive to Combiner BIT module CN16)

❑ CN4 SMB connector (forward power sense from Combiner BIT module CN27)

❑ CN2 6-way connector (6-wire loom to Combiner BIT module CN15).

(3) Remove the eight M3 x 8 mm captive washer screws that secure the module to the mainframe. (4) Remove the module from the chassis.

Refitting

To refit the PA Control module, proceed as follows:

(1) Place the module in position. Ensure no wires are trapped by the module. (2) Fit the eight M3 x 8 mm cap tiv e was her s c re ws, pr eviously removed, that s ec ur e t he m odu le to

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

❑ CN2 6-way connector (6-wire loom to Combiner BIT module CN15)

❑ CN4 SMB connector (forward power sense from Combiner BIT module CN27)

❑ CN3 SMB connector (RF drive to Combiner BIT module CN16)

❑ CN5 SMB connector (reference frequency from front panel)

❑ CN6 10-way connector (10-way ribbon cable from PSU Regulator module CN5)

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

(4) Re-establish the ac and/or dc supplies. (5) Switch power on at the radio using the rear mounted Power switch. (6) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. (7) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure

To Calibrate the Transmitter on page 26.

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

page 3.

(10) Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the

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

Removing and Refitting the Power Supply Modules

The Power Supply modules are located as shown in Fig 5. The removal diagram is shown in Fig 11.

WARNING Dangerous Voltages

Removal

Before attempting to remove the Power Supply modules, ensure that the transmitter is isolated from the ac and dc input supplies. Then proceed as follows:

(1) Remove the transmitter top and bottom covers as described previously. (2) Support the radio on its side. (3) Locate the power s upplies. From the bo ttom half of the unit remove the two No. 6 x 32 UNC

countersunk screws that secure each power supply to the transmitter mainframe. These screws

are accessed through clearance holes in the Combiner BIT module. During this operation

support the power supply from the top half of the unit. (4) Withdraw each power supp ly from the chassis sufficient to allo w access to the power terminal

blocks taking care not to damage the ac terminal plastic supply guard. (5) Remove the CN4 connectors (PSU-1 and PSU-2 to the Combiner BIT module, CN10 and CN11

respectively). (6) Disconnect the dc wires from the power supply terminal block (PSU-1 and PSU-2 to the

Combiner BIT module, CN1 and CN3 respectively). (7) Slide back the terminal block cover and disconnect the ac wires from the three connector terminal

block (marked L N E). (8) Carefully remove each power supply from the transmitter.

T6T VHF 100 W Transmitter Page 14 Maintenance

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Refitting

To refit the power supply modules:

(1) With the transmitter on its side hold each power supply near to its securing position in the top half

of the radio. (2) Slide back the terminal block cover and connect the ac wires to the three connector te rminal

block (marked L N E); brown to terminal L, blue to terminal N and yellow/green to terminal E. (3) Connect the dc wires to the eight connector terminal block, red to terminal 1 and terminal 2 and

black to terminal 5 and terminal 6. (4) Connect CN4. (5) Taking care not to damage th e plastic supply guard, lower the power supply i nto position and

secure from the bottom half of the unit u sing two coun tersunk scr ews, previous ly removed, for

each power supply. (6) Re-establish the ac and/or dc supplies. (7) Switch power on at the radio using the rear mounted Power switch. (8) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. (9) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (10) Set the rear panel Power switch to Standby. Isolate the transmitter from the ac and/or dc

supplies. (11) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.

T6T VHF 100 W Transmitter Page 15 Maintenance

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Removing and Refitting the Combiner BIT Module

The Combiner BIT modul e is located as shown in Fig 5. The removal diagram is shown in Fig 1 2.

WARNING Dangerous Voltages

Removal

Before attempting to rem ove th e Combi ner BIT m odule, ensure t hat the transmi tter is i solated from t he ac and dc input supplies. Then proceed as follows:

(1) Remove the transmitter top and bottom covers. (2) Locate the Combiner BIT module and disconnect the following connectors:

❑ CN1 4-way connector

❑ CN2 3-way connector

❑ CN3 4-way connector

❑ CN4 3-way connector

❑ CN5 3-way connector

❑ CN6 3-way connector

❑ CN7 8-way connector

❑ CN10 3-way connector

❑ CN11 3-way connector

❑ CN12 6-way connector

❑ CN13 6-way connector

❑ CN14 6-way connector

❑ CN15 10-way connector

❑ CN16 SMB connector

❑ CN17 SMB connector

❑ CN18 SMB connector

❑ CN22 QMA connector

❑ CN23 QMA connector

❑ CN24 QMA connector

❑ CN25 SMB connector

❑ CN26 SMB connector

❑ CN27 SMB connector

(3) The Combiner BIT module is sec ured from both s ides of the cha ssis thus requiri ng removal of

the Power Supply modules. Refer to page 14 and remove both Power Supply modules. (4) Removal of the Powe r Sup ply m odu les wi ll expose the six M3 x 6 mm countersunk screws that

secure the Combiner BIT module heatsink to the chassis. Remove these six screws.

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(5) Remove the six M3 nuts that sec ure the Combiner BIT module PCB to the stud sp acers. Also

remove the two M3 x 8 mm pan head sc rews that s ecure th e Co mbine r BIT modul e heats ink to

the lower PA heatsink. The Combiner BIT module can now be removed.

Refitting

(1) Place the Combiner BIT m odule in pl ace on the st ud spacers and replac e the six wa shers and

nuts but do not tighten. Tak e care that ca bles are dressed prop erly and that none are trapped.

Replace the two scr ews that secure the Combiner BIT mod ule to the PA heat sink, but do not

tighten. (2) Turn the unit over and replace the six countersunk M3 x 6 mm screws. Tighten these and return

to the other side to tighten the six nuts and two screws. (3) All 22 connectors removed earlier can now be reconnected. Refer to Fig 6 and Fig 7, if

necessary. (4) Re-establish the ac and/or dc supplies. (5) Switch power on at the radio using the rear mounted Power switch. (6) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. (7) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure

To Calibrate the Transmitter on page 26.

(8) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (9) Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the

transmitter from the ac and/or dc supplies. (10) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.

T6T VHF 100 W Transmitter Page 17 Maintenance

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Removing and Refitting the PA Modules

Caution Repairs

The PA modules a re lo ca ted one above the other on the r ig ht sid e of the transmitter as s hown in Fig 5. The module removal diagram is shown in Fig 13. At the transmitter rear panel, each PA module is fastened to the chassis with two M3 x 8 mm panhead screws. At the front, the modules are fastened with one countersunk screw each, one at the top (PA-1) and one at the bottom (PA-2). They are also secured to the front panel with two M5 x 20 mm panhead screws that also fix the right-hand equipment handle.

WARNING Dangerous Voltages

Removal

Before attempting to remove one or both PA modules, ensure that the transmitter is isolated from the ac and dc input supplies. Then proceed as follows:

(1) Remove the transmitter top and bottom covers. (2) Disconnect CN3, a flying 3-way connector from the Com biner BIT module, CN5 ( PA-1) and/or

CN6 (PA-2). (3) At the Combiner BIT module disconnect the 6-way CN13 (PA-1) and/or CN14 (PA-2). Also

remove the two M3 x 8 mm pan head sc rews that s ecure th e Co mbine r BIT modul e heats ink to

the lower PA module heatsink. (4) Disconnect the SMB connec tors CN8 from PA-1 (upper) and PA-2 (lower). Disc onnect SMB

connector CN10 from the lower PA using long nosed pliers; do not pull on the cable. On the lower

PA remove the screw securing the p-clip that holds the coaxial cabl e coming from the type-N

connector at the rear. (5) Disconnect the type-N connectors at the rear of the PA modules. (6) Remove the four countersunk M3 x 6 mm screws that hold the front panel to the chassis. (7) Remove the equipment handl e from the right-hand side of the tran smitter by unscrewing and

removing the two M5 x 20 mm panhead screws tha t secure it . Loose n (but do not r emove) t he

two screws securing the left-hand equipment handle so that the front panel can be pulled slightly

away from the PA heatsinks.

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(8) Remove the two screws holding the upper heatsink to the rear panel and the countersunk screw

securing it to the front of the chassis. Slowly withdraw the upper PA module from the mainframe

taking care not to snag the wir ing looms. Note that SM B connector CN10 is lo cated within the

bottom of the heatsink fins and should be disconnected using long nosed pliers. Do not attempt

to remove the connector by pulling on the cable. (9) Remove the two screws holding the lower heatsink to the rear panel and the countersunk screw

securing it to the bottom of th e chassi s in front. Slowly withdr aw the lower PA module from the

mainframe taking care not to snag the wiring looms.

Refitting

To refit the PA modules, proceed as follows:

(1) Place the lower PA module in positi on and sec ure it i n place with the sing le cou nters unk scr ew

at the front and the two pan head screws at the rear. Rep lace the two screws that sec ure the

Combiner BIT module to the PA heatsink. Connect the SMB connector CN10. (2) Route the coaxial cable with the type-N connector out the rear of the module and connect to CN1.

Replace the p-clip that was removed earlier. Ensure no wires are trapped by the module. (3) Next, while placing the upper PA module in posi tion, fir st connec t SMB c onnector CN10 befor e

replacing the two rear s crews and the front countersunk screw. Route the coaxial cable from

Combiner BIT module out between the PAs via the heatsink groove. Connect the type-N to CN1. (4) Fit the four countersunk s crews , prev io us ly remov ed , that s ec ure the fr on t pane l to the cha ssis ,

two at the top and two at th e bottom. Replace the right-hand handl e and tighten the screws

securing the left-hand handle. (5) Connect the SMB connecto rs CN8 on both modules and CN13 (PA-1) and CN1 4 (PA-2) at the

Combiner BIT module. (6) Connect the two flying 3-way connectors CN3 th at come from CN5 ( PA-1) and CN6 (PA-2) on

the Combiner BIT module. (7) Re-establish the ac and/or dc supplies and switch power on at the radio using the rear mounted

Power switch. (8) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. (9) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure

To Calibrate the Transmitter on page 26.

(10) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (11) Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the

transmitter from the ac and/or dc supplies. (12) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.

T6T VHF 100 W Transmitter Page 19 Maintenance

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Removing and Refitting the Front Panel Assembly PCB

The Front Panel assembly PCB is located as shown in Fig 14. Removing this assembly necessitates the removal of both Power Supply modules and partial removal of the Combiner BIT module.

WARNING Dangerous Voltages

Removal

Before attempting to remove the Front Panel assembly PCB, ensure that the transmitter is isolated from the ac and dc input supplies. Then proceed as follows:

(1) Remove the transmitter top and bottom covers. (2) Disconnect CN4 (34-way ribbon cable) at the Processor module. Carefully push the cable

through the aperture to the other side of the chassis. (3) Refer to the instructions for removal of the Combiner BIT module, but do not remove any

connectors. The Power Supply modules must be removed and the Combiner BIT module’s

securing screws must be rem oved so that it can be lifted sl ightly away fro m the chassis. This

permits the ribbon cable to pass under the Combiner BIT module. (4) Disconnect SMB connec tor CN5 at th e PA Co ntrol mod ule ( note how the cab le is ro uted to t he

front panel). (5) Remove the two handles from the front panel by removing the four M5 x 20 mm panhead screws. (6) Remove the four cou ntersunk M3 x 6 mm sc rews that hold the front p anel to the c hassis. Th e

front panel can now be moved away from the mainframe while guiding the ribbon and coaxial

cables from within. (7) With the front panel free from the mai nfram e, relea se the contr ol knob by uns crewin g the A llen

head grub screw using a 1.5 mm Allen key. Withdraw the control knob from the spindle. (8) Remove the Front P anel PCB f rom the Fron t Panel as sembly by r emoving th e six M3 x 6 mm

panhead screws and wavy washers.

Refitting

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

(1) Place the PCB in position on the front panel. Ensure the spindle of the control knob and

microphone/diagnostics connector are correctly located. Secure the PCB to the Front Panel

assembly using the six M3 x 6 mm panhead screws and wavy washers previously removed. (2) At the front panel, place the control knob onto the spindle and using a 1.5 mm Allen key, secure

the Allen head grub screw. (3) Feed the ribbon and coaxial cables through their respective holes at the front of the chassis (4) Secure the Front Panel a ssem bly t o the t op an d bot tom of the chas sis us ing the fo ur M3 x 6 mm

countersunk screws. Fit the two equipment handles using the four M5 x 20 mm panhead screws

previously removed. (5) Route the ribbon cable under the Com biner BI T mod ule, throu gh th e apertur e to the P rocessor

module and connect it to CN4.

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(6) Route the coaxial cable SMB connector to CN5 on the PA Control module and connect it. (7) Re-establish the ac and/or dc supplies. (8) Switch power on at the radio using the rear mounted Power switch. (9) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit. (10) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5. (11) Set the rear panel Power switch to Standby. Isolate the transmitter from the ac and/or dc

supplies. (12) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.

Removing and Refitting the Cooling Fans

The cooling fans are mounted at the rear of the PA modules as shown in Fig 5. The removal diagram is shown in Fig 15.

WARNING Dangerous Voltages

Removal

Before attempting to r emove the fan, ensure that t he transmitter is isolated f rom the ac and dc input supplies. Then proceed as follows:

(1) Disconnect the two-pin connector. (2) Remove the fan finger guard. (3) Using an Allen key inserted through the holes exposed when the finger guard is removed,

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

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

Refitting

To refit a cooling fan, proceed as follows:

(1) Locate the fan in positi on and using a suitable All en key ins erted through th e holes for the fan

finger guard, secure using the three M4 x 12 mm caphead Allen screws previously removed. (2) Secure the finger guard to the fan. (3) Connect the two-pin fan connector to the fan. Ensure the + marked socket mates with the +

marked plug on the fan. (4) Re-establish the ac and/or dc supplies. (5) Switch power on at the radio using the rear mounted Power switch. (6) Ensure the front panel Ready indicator is lit and the Ala rm in dic ato r is unl it. The tr ans mitter c an

now be returned to service.

T6T VHF 100 W Transmitter Page 21 Maintenance

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Virtual Front Panel (VFP)

Virtual Front Panel (VFP) software is supplied on CD-ROM a nd is compatible with any PC or lapt op running Windows 2000™ or Windo ws XP ™. T he VFP allo ws ch ang es to a rad io’ s setti ngs and cha nne l information, it dis plays the curre nt BIT state, display s BIT history, allo ws security lo cks to be set, and provides maintenance facilities.

A radio can be set up using the front panel Scroll/Select switch and LCD, or by using the VFP. Using the VFP has several advantages over setting the transmitter from the front panel; these are:

❑ A profile of the transmitter’s operation settings and channel information can be created, stored on

disk, and then recalled to download into other transmitters

❑ A print out of the transmitter’s profile can be made from the VFP ❑ Front Panel Lock is availa ble only when usi ng the VFP. As pa rt of the trans mi tter’s Se ttin gs (see

Fig 2), Front Panel Lock can be set to ON. When selected to on, no settings or frequency information can be changed from the front panel

❑ If the transmitter is p art of a MARC sys tem or operates i n a digital mod e, a MARC Lock, HDLC

Lock and T1E1 Lock ar e available when using the VFP. When selected to on, no settings or frequency information can be changed from the MARC equipment screen, or the digital control equipment.

Fig 2 Typical VFP Screen - AM-Voice Profile Shown

T6T VHF 100 W Transmitter Page 22 Maintenance

Park Air Systems B63100HS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual