6881094C28-D July 16, 2004
Performance Checks: Receiver Performance Checks 5-7
3. Press the Top Button again; the radio beeps, indicating that the Top Button is in the closed
position.
4. Rotate the Two-Position Concentric Switch; the radio beeps in each switch position.
5. Rotate the 16-Position Select Switch; the radio beeps in each switch position.
6. Cycle through the Three-Position A/B/C Switch; the radio beeps in each switch position.
7. Rotate the Volume Control; the radio beeps at each new volume setting.
8. Press the Top Side Button; the radio beeps.
9. Press Side Button 1; the radio beeps.
10. Press Side Button 2; the radio beeps.
5.4 Receiver Performance Checks
The following tables outline the performance checks for the receiver.
Table 5-5. Receiver Performance Checks
Test Name System Analyzer Radio Test Set Comments
Reference
Frequency
RF Control: Monitor
Meter: RF Display
Display: Bar Graphs
Freq: Selected radio TX
freq.
TEST MODE CSQ
channel* or
programmed
conventional
channel
PTT to continuous
(during the
performance
check)
VHF: 2.0 ppm
(272–348 Hz)
UHF R1: 2.0 ppm
(760–940 Hz)
UHF R2: 2.0 ppm
(900–1040 Hz)
700/800 MHz: 1.5 ppm
(1.15–1.30 kHz)
Rated Audio RF Control: Gen
Output Level: -47 dBm
Freq: Selected radio RX
freq.
Mod: 1kHz tone @ 3kHz
dev.
Meter: AC Volts
As above PTT to OFF
(center)
Set volume control to
3.74 Vrms
Distortion As above, except
Meter: Ext Dist.
As above As above Distortion < 3.0%
Sensitivity
(SINAD)
As above, except
Meter: SINAD
As above As above RF input to be < 0.35 µV
Noise Squelch
Threshold
(only radios
with
conventional
system need
to be tested)
Set as for rated audio
check
Out of TEST
MODE; select a
conventional
system
As above Set volume control to
3.74 Vrms.
Set RF level to -130 dBm
and raise until radio
unsquelches.
Unsquelch to occur at
< 0.25 µV. Preferred SINAD
= 6-8 dB.
* See Table 5-4 on page 5-4.