6-77
SECTION 6
OPTIONS
These are all the test results available for the Audio Test-Radio except for the Tx Audio
Response results. Some of these results are based on the Rated Output of the radio.
This is acquired by injecting a 1 kHz sine wave via the Data Gen output jack and raising
the level until 3 kHz (1.5 kHz for narrow band) of deviation is transmitted by the radio.
Results: Audio Test (Radio)
TX DEVIATION @ 15 mVrms
This result is the deviation
reading (in kHz) of the Radio
transmitter modulating a 1 kHz
sine wave injected into the
Radio’s audio-in path from the
COM-120C Data Gen output
baseband jack at 15 mVrms level.
Does not include any deviation from the Radio’s sub-audible data.
TX MODULATION LIMITING @ 300 Hz
This result is the deviation reading (in kHz) of the Radio transmitter modulation with
a 300 Hz sine wave injected into the Radio’s audio-in path from the COM-120C Data
Gen output baseband jack at a level which is 20 dB higher than 60% of the Radio’s
Rated Output. The result in the right column is the actual level in mVp which was
used to make the deviation measurement.
TX MODULATION LIMITING @ 3 kHz
This result is the deviation reading (in kHz) of the Radio transmitter modulation with
a 3 kHz sine wave injected into the Radio’s audio-in path from the COM-120C Data
Gen output baseband jack at a level which is 20 dB higher than 60% of the Radio’s
Rated Output. The result in the right column is the actual level in mVp which was
used to make the deviation measurement.
TX MODULATION LIMITING (Burst)
This result is the peak deviation reading (in kHz) of the Radio transmitter
modulation with a burst of 1 kHz sine wave injected into the Radio’s audio-in path
from the COM-120C Data Gen output baseband jack at a level which is 20 dB higher
than 60% of the Radio’s Rated Output. The result in the right column is the actual
level in mVp which was used to make the deviation measurement.
TX AUDIO DISTORTION
This result is the Distortion measurement in % of the Radio’s transmitter with a
1 kHz sine wave injected into the Radio’s audio-in path from the COM-120C Data
Gen output baseband jack at the level of the Radio’s Rated Output. The Radio’s
sub-audible data is not included in this measurement.
0061600
[Radio]
TX MOD LIMITING @ 300 Hz:
TX DEVIATION @ 15 m Vrms:
TX MOD LIMITING @ 3 kHz:
TX MOD LIMITING (Burst):
TX AUDIO DISTORTION:
RX AUDIO SESITIVITY:
RX SINAD @ 12dB:
3.73 kHz
4.15 kHz
2.89 kHz
3.68 kHz
2.8%
878.4m Vp_p
-121.8 dBm
110m Vp
110m Vp
110m Vp
0.30 Vrms
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