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Page Title: Section IV. FUNCTIONING OF INDICATOR, ANTENNA ALIGNMENT 1D-1708/GRC CIRCUITS
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TM 11-5820-695-35
Section IV. FUNCTIONING OF INDICATOR, ANTENNA
ALIGNMENT 1D-1708/GRC CIRCUITS
from 70 MHz intermediate frequency am plifier 2A5 in
2-78.
General
the R1467/GRC-144 is applied to meter Ml through
connector P1, cable W1, and switch 91 (ON position).
Indicator, Antenna Alignment ID-1708/GRC is used to
Capacitor C1 averages out the fluctuations of the
measure the relative signal strength of the 70 MHz if
incoming agc signal to provide a peak reading on the
carrier signal in Receiver, Radio R-1467/GRC-144. The
meter.
In the OFF(TRANSIT) position, switch S1
agc level, derived from the 70 MHz If carrier signal, is
provides a short across the meter. Terminals E1 and E2
applied to the ID-1708/GRC  to  provide  a  relative
are provided for connecting a telephone handset to
signal  strength  indication  and  facilitate  antenna
permit communication over the link and also with shelter
alignment.
personnel. Terminals E1 and E2 are connected to the
remote phone circuit through P1-F and P1-G.
2-79.
Indicator, Antenna Alignment
ID-1708/GKR Circuit Functioning
The agc signal level and the agc meter reference level
Figure 2-28. Indicator, Antenna Alignment ID-1708/GRC, schematic diagram.
2-120


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