6-78
SECTION 6
OPTIONS
RX AUDIO SENSITIVITY
This result is the AF Level read back from the Radio’s audio output path with a
1 kHz sine wave FM-generated at 3 kHz (1.5 kHz for narrow band) deviation,
-50.0 dBm level, from the COM-120C to the Radio’s antenna input (Radio must have
receiver unsquelched). The AF Level voltage is then measured using wideband (no)
filtering from the Audio/Data/SINAD Input baseband jack. The radio must be set at
full volume to make this measurement. The result is the AF Level voltage shown in
Vrms and mV peak to peak.
RX SINAD @ 12 dB
This result is the SINAD reading from the Radio’s audio output path with a 1 kHz
sine wave FM-generated at 3 kHz (1.5 kHz for narrow band) deviation from the
COM-120C to the Radio’s antenna input (Radio must have receiver unsquelched).
The COM-120C Generator RF Level starts at -105.0 dBm and lowered until a SINAD
reading of 12 dB is acquired. Then the RF Level is recorded as the result of the
test in dBm.
If the Radio squelches because of sub-audible drop out before the 12 dB SINAD is
reached, the last good reading taken before the Radio squelched is recorded and
shown along with the RF Level at that reading.
Results: Audio Test (Radio Tx Audio Response)
TX AUDIO RESPONSE
This shows the results of the
measured deviation from the
Radio’s transmitter with a
series of tone frequencies (sine
wave) injected into the Radio’s
audio input path from the COM-
120C Data Gen output
baseband jack at 20% of the Radio’s
Rated Output
. Measurements
do not include the Radio’s sub-audible data deviation.
The series of tone frequencies used are: 300 Hz, 800 Hz, 1300 Hz, 1800 Hz,
2300 Hz, 2800 Hz and 3000 Hz.
The following text describes the test results and their significance in order of
appearance on the screen.
If only Registration was ENABLED, only the first three rows of results are shown.
006160
Tx Audio Response
Freq:
[Radio]
.3 K .8 K 1.3 K 1.8 K 2.3 K 2.8 K 3.0 K
1.050.25 0.880.62 1.161.18 1.07 kHz
Dev:
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