Performance Checks
19
Table 9. Receiver Performance Checks
Test Name System Analyzer Radio Test Set Comments
Reference
Frequency
Mode: PWR MON 4th
channel test frequency*
Monitor: Frequency error.
Input at RF In/Out
TEST MODE, 4
CSQ output at
antenna
PTT to continuous
(during the performance
check)
Frequency error to
be ≤ ±1.3 kHz
Rated Audio Mode: GEN
Output level: 1.0mV RF 4th
channel test frequency*
Mod: 1 kHz tone at 3 kHz
deviation
Monitor: DVM: ac Volts
TEST MODE, 4
CSQ
PTT to OFF (center);
meter selector to Audio
PA
Set volume control
to 3.74Vrms
Distortion As above, except to distortion As above As above Distortion < 3.0%
Sensitivity
(SINAD)
As above, except SINAD;
lower the RF level for 12dB
SINAD
As above PTT to OFF (center) RF input to be <
0.35µV
Noise Squelch
Threshold (only
radios with
conventional
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 3.74Vrms
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 =
5-8dB
*See Table 7 on page 16.
To Next Page
Loading...
Need help?
General
