Click here to make tpub.com your Home Page

Page Title: SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL.
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
   
   

 



TM 11-5820-401-34-3/0967-LP-432-3060
5-27. A5200 SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL. (CONT)
9. Adjust AN/URM-103 DEVIATION control for 3-kHz reading on DEVIATION KHZ meter.
10. Adjust AN/URM-127 FREQ RANGE DIAL to vary frequency above and below 7.3 kHz while
observing ME-30(*)/U. Stop at frequency that gives highest possible ME-30(*)/U
reading. At same time, adjust AN/URM-103 DEVIATION control to keep ME-30(*)/U reading
between 2 and 4 vac. If adjustment of DEVIATION control is required, readjust AN/URM-127
frequency for peak ME-30(*)/U reading.
11.Adjust AN/URM-103 DEVIATION control for ME-30(*)/U reading 4 db less than reading
recorded in step 5.
12. Check R-442/VRC CALL light. If light is out, go to step 13. If light is on, go to step 14.
13. CALL LIGHT OUT. Turn R5216 (3) counterclockwise slowly and stop at point where light
just comes on.
14. CALL LIGHT ON. Turn R5216 (3) clockwise until light goes out, then perform step 13.
OLD SQUELCH Final Test
15. Adjust AN/URM-103 DEVIATION control for 8 kHz reading on DEVIATION KHZ meter.
16. Set AN/USM-127 FREQ RANGE MULTIPLIER to x10.
17. Set AN/USM-127 FREQ RANGE DIAL to 35 (350 Hz). R-442/VRC CALL light should be on.
NOTE
CALL light must stay on through range of 350 to 3500 Hz.
18.
Rotate FREQ RANGE DIAL fully clockwise to 2000 Hz. CALL light should stay on.
19.
Rotate FREQ RANGE DIAL fully counterclockwise.
20.
Set FREQ RANGE MULTIPLIER to x100.
.
21.
Rotate FREQ RANGE DIAL to 35 (3500 Hz). CALL light should stay on,
NOTE
If R-442/VRC fails the OLD SQUELCH Final Test, replace the A5300 module and repeat
the entire alinement procedure.
5-28. SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, OLD SQUELCH LEVEL.
PURPOSE. This procedure adjusts the receiver sensitivity to the OLD SQUELCH signals which
include internal noise and the received carrier.
5-127


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

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