NOTE
The voltage levels displayed in the Audio
Control zone are peak open circuit voltages.
Source impedance of the MOD OUT port is
100 ohms.
4. Turn the 1kHz signal on, and set for
minimum level as determined in step 3.
Audio Sum: 0.00 V pk
Fixed 1kHz:
Synth: 0.00 V x
0.40 V ~
Format Sel:
PL
FREQ: 131.8 Hz
DTMF: 0.00 V x
Code: 1234567890#ABCD
External: 0.00 V x
5. Verify proper MIC sensitivity by reading
the deviation. Refer to your radio's service
manual to determine maximum rated system
deviation to determine if any adjustments
are required.
Meter: RF DISPLAY
Mon Freq: 816.500 MHz
Freq Err: + 47 Hz
Dev: 3.5 kHz
Input Lvl: -70.5 dBm
6. Set the 1 kHz audio modulating signal for
maximum level as determined in step 3.
Repeat steps 4 and 5.
7. To measure the percentage of distortion,
locate the cursor within the Display Control
zone, at the "meter:" field. Press the
INT
DIST
softkey to measure percentage of
distortion.
INT
DIST
EXT
DIST
SINAD
more
Internal
Distortion
8. Refer to the displayed digital readout and
bar graph. Refer to your radio's service
manual to determine if any adjustments are
required.
M eter: INTERNA L DIST
Distortion
3.7 %
0 100
67