Service manual

Reference Mode: PWR MON TEST MODE, PTT to continuous Frequency error to be ≤ ±600Hz

Frequency 4th channel test frequency

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4 CSQ (during the

Monitor: Frequency error output at performance check)

Input at RF In/Out antenna

Rated Audio Mode: GEN TEST MODE, PTT to OFF (center), Set volume control to

Output level: 1.0mV RF 4 CSQ meter selector to 3.74Vrms

4th channel test frequency

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Audio PA

Mod: 1kHz tone at

3kHz deviation

Monitor: DVM: ac Volts

Distortion As above, except to As above As above Distortion < 3.0%

distortion

Sensitivity As above, except SINAD, As above PTT to OFF (center) RF input to be < 0.35µV

(SINAD) lower the RF level for 12dB

SINAD

Noise Squelch RF level set to 1mV RF As above PTT to OFF (center), Set volume control to

Threshold meter selection to 3.74Vrms

(only radios with Audio PA, spkr/load

conventional to speaker

system need

to be tested) As above, except change Out of TEST As above Unsquelch to occur at < 0.25µV

frequency to a conventional MODE; select a

system. Raise RF level from conventional

zero until radio unsquelches. system Preferred SINAD = 8-10dB

Table 8. Receiver Performance Checks

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(See Table 7.)

Test System

Name Analyzer Radio Test Set Comments Name