 |
|||
|
|
|||
|
Page Title:
Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 7 of 17) |
|
||
| ||||||||||
|
|  TO 31R2-2GRC171-2
TM 11-5820-815-14
NAVELEX 0967-LP-544-5010
Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 7 of 17)
CONTROL SETTINGS
OPERATION OF TEST
AND OPERATION
PERFORMANCE
STEP
EQUIPMENT
POINT OF TEST
OF EQIPMENT
STANDARD
RECEIVER WIDE-BAND AUDIO RESPONSE (Cont)
31
Set rf signal generator for
Observe and com-
the following modulation
pare audio output
frequencies:
level for each
modulation fre-
quency with
reference level
determined in
step 30.
20-kHz
36-kHz
60-kHz
20-kHz
36-kHz
60-kHz
BW
BW
BW
BW
BW
BW
a.
16 Hz
16 Hz
16 Hz
a.
Ref +1,-3 dB
Ref +1,-3 dB
Ref +1,-3 dB
Ref +1 dB
b.
300 Hz
300 Hz
300 Hz
b.
Ref 1 dB
Ref +1 dB
c.
8 kHz
8 kHz
8 kHz
c.
Ref +1 dB
Ref +1 dB
Ref 1 dB
d.
NA
25 kHz
25 kHz
d.
NA
Ref 1 dB
Ref 1 dB
e.
20 kHz
36 kHz
60 kHz
e.
Ref - 6 dB
Ref - 6 dB
Ref - 6 dB
RECEIVER AUDIO DISTORTION
32
Connect equipment as
AUDIO OUTPUT
Set REMOTE/LOCAL
shown in figure 5-2 and
(A10A2J22-N/S)
switch to LOCAL,
connect 600-ohm load
PTT/CARRIER TEST
and distortion analyzer
switch to PTT,
across RT-980/
SQUELCH switch to
GRC-171 AUDIO
OFF, and frequency
OUTPUT
switches to 300.000
(A10A2J22-N/S).
MHz.
33
Set rf signal generator for
Measure total dis-
Maximum 10%.
rf input level of 1.0 V
tortion of receiver
(into 50-ohm load) at
output.
300.000 MHz, 30%
modulation at 1000 Hz.
34
Increase rf signal
Measure total dis-
Maximum 15%.
generator modulation
tortion of receiver
to 90%.
output.
5-13
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals