Nikon RADIUS CM200 Bedienungsanleitung PDF herunterladen (Seite 41)

RF Test Mode 3-5

Table 3-6 Receiver Performance Checks

* See Tables 3-4.

Test Name Communications Analyzer Radio Test Set Comment

Reference

Frequency

Mode: PWR MON

4th channel test frequency*

Monitor: Frequency error

Input at RF In/Out

TEST MODE,

Test Channel 4

carrier squelch

output at

antenna

PTT to

continuous

(during the

performance

check)

Frequency error to

be: ±186 Hz VHF1

±200 Hz VHF2

±568 Hz UHF2

±600 Hz UHF3

Rated Audio Mode: GEN

Output level: 1.0mV RF

4th channel test frequency*

Mod: 1kHz tone at

3kHz deviation

Monitor: DVM: AC Volts

TEST MODE

Test Channel 4

carrier squelch

PTT to OFF

(center),

meter selector

to Audio PA

Set volume control

to 8.10Vrms

Distortion As above, except to distortion As above As above Distortion <5.0%

Sensitivity

(SINAD)

As above, except SINAD,

lower the RF level for 12dB

SINAD.

As above PTT to OFF

(center)

RF input to be

<0.3µV

Noise

Squelch

Threshold

(only radios

with

conventiona

l system

need to be

tested)

RF level set to 1mV RF As above PTT to OFF

(center),

meter

selection to

Audio PA,

spkr/ load to

speaker

Set volume control

to 3.16Vrms

As above, except change

frequency to a conventional

system. Raise RF level from

zero until radio unsquelches.

out of TEST

MODE; select a

conventional

system

As above Unsquelch to occur

at <0.25µV.

Preferred SINAD =

9-10dB

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 69 70

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