Codan-radio MT-4E Analog and P25 Digital - Maintenance Guide Instrukcja Użytkownika Pobierz pdf (Strona 50)

MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS

Chapter 5: Codan Radio System TestingPage 42

Transmitter CTCSS Testing

MT-4E Transmitters can be programmed, per channel, to generate CTCSS tones internally, or to allow

for External Input of the CTCSS tones from another device (such as a tone-remote adapter).

Connect the IFR 2975 and Codan Radio as shown in Figure 5-28. The Tx Subtone input connection

is only required when testing the External Input. If the internal programming is used to generate the

CTCSS tone, disconnect the Tx Subtone input from the IFR 2975.

Figure 5-28: Transmitter CTCSS Testing

On the IFR 2975, recall Codan setup 7 (Tx_CTCSS) from your internal drive. Enter the correct RF

frequency on the IFR 2975, set the MIC MODE switch on the front panel of the transmitter to Analog

and ﬂ ip the other switch to KEY TX (or set the switch to NORM and key the transmitter through the

RSS).

TRANSMITTER

CNTL

BUS

MIC RF OUT

ANALOG

DIGITAL

NORM

OFF

KEY TX

MICMODE

REF

USB

FREQUENCY (MHz)

MADE IN CANADA

MODEL # CODE

VOL

SYSTEM REGULATOR

METER

MADE IN CANADA

OFF

SPKR

INT

EXT

SPKR

OFF

POWER

FUNCTION

Computer running RSS

USB from

Computer to Tx

Tx RF OUT to T/R port on IFR 2975

HELP

MODE

TAB

SHIFT

BKSP

HOLD

RETURN

ESC

ENTER

POWER

ABC

DEF

JKL MNOGHI

654

TUV WXYZPQRS

987

#0*

VOLUME

SQUELCH

GEN T/R ANT

125 W MAX

MIC AUDIO I/O

DVMCH2CH1SCOPETEST PORT

100V MAX 100V MAX 100V MAX

Tx Subtone Input

(to pins B22 and Ground (B32))

AUDIO IN AUDIO OUT 1 AUDIO OUT 2

Audio

Out 1

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 75 76

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