Quantcast Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 11 of 17)

 

Click here to make tpub.com your Home Page

Page Title: Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 11 of 17)
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 10 of 17)
Up
TM-11-5820-815-14 Service and Circuit Diagrams RADIO SET AN/GRC-171 Manual
Next
Table 5-3. Radio Receiver-Transmitter RT-980/GRC-171 Performance Tests (Sheet 12 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 11 of 17)
CONTROL SETTINGS
OPERATION OF TEST
AND OPERATION
PERFORMANCE
STEP
EQUIPMENT
POINT OF TEST
OF EQUIPMENT
STANDARD
TRANSMITTER NARROW-BAND MODULATION
50
Connect equipment as
XCVR
Set REMOTE/LOCAL
shown in figure 5-6.
(A10W3J2)
switch to LOCAL,
Set audio oscillator
PTT/CARRIER TEST
for 2.45 V rms (+10
switch to CARRIER
dB mW) at 1000-Hz
TEST, SQUELCH
input to RT-980/
switch to OFF, and
GRC-171 as observed
frequency switches
on digital multimeter.
to 300.000 MHz.
Set rf signal genera-
tor to 298.000 MHz.
While observing os-
cilloscope display,
adjust rf signal
generator output level
to obtain RT-980/
GRC-171 modulation
envelope.
51
Measure and determine
Adjust % MOD
85 to 95%.
the modulation per-
adjustment if
centage using the oscil-
necessary to ob-
loscope display and the
tain required
following formula:
percent of
modulation.
E
-E
MAX
MIN
M=
x 100%
E
+E
MAX
MIN
52
Set audio oscillator level
75 to 95%.
for 0.135 V rms (-15 dB
mW) at 1000-Hz input to
RT-980/GRC-171 as ob-
served on digital volt-
meter. Measure and
determine modulation
percentage.
53
Set audio oscillator
Observe that over-
level for 7.75 V rms
modulation does not
(+20 dB mW) at 1000-
occur (a minimum rf
Hz input to RT-980/
level of zero cor-
GRC-171 as observed
responds to over-
on digital voltmeter.
modulation of the
RT-980/GRC-171).
5-17


Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business