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Page Title:
Retransmission Operating Procedures |
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|  assist. It may be necessary for the pilot to relocate the
voice
helicopter to regain link transmission.
retransmissi
on
other
NOTE
than those
Set XMTR
made
for
HI-LO
plain voice
switch
on
above.
both
d. If secure voice operation is used, it is necessary
transceivers
for the AN/ASC-15(V)(*) operator to monitor secure voice
(RT-
retransmission or communicate with stations in the
823/ARC-
secure voice mode. A TSEC/KY-28 and a C-8157/ARC
131) to LO
must be installed in the AN/ASC- 15A (V)(*) for secure
whenever
voice operation.
possible to
CAUTION
limit range
and
the
When
possibility of
operating
rf
an
AN/ASC-
problems.
15A(V)(*)
a. Place HYL-3/TSEC FUNCTION switch to XMIT 1;
with
press the push-to-talk (ptt) switch on the U-94A/U and
TSEC/KY-
make contact with ground station 1; adjust the volume
28 installed,
controls on the ICS box, the FM control head, and on the
be careful
HYL-3/TSEC for normal listening level; have station 1
not
to
standby for initial contact with station 2.
accidentally
b. Place HYL-3/TSEC FUNCTION switch to XMIT 2;
actuate the
ZEROIZE
press the ptt switch and make contact with station 2;
switch
on
have station 2 wait 5 seconds and then make a call to
the
C-
station 1; place HYL-3/TSEC FUNCTION switch to
8157/ARC
RETRANS.
c. Monitor transmissions between stations 1 and 2
or open the
access door
to determine if communication is taking place.
on
the
NOTE
TSEC/KY-
When
28. To do
operating
so
will
with
the
prevent
HYL-
further
3/TSEC,
secure
either plain
voice
or
secure
operation.
voice
messages
3-14. Retransmission Operating Procedures
will
be
a. While listening in the headset on the No. 1 C-
automaticall
8157/ARC, place the PLAIN/CIPHER switch to CIPHER,
y
the RE-X REG switch to REG, and the POWER switch to
retransmitte
ON (or, if already ON, switch to off (down) and then back
d.
No
to ON). A constant tone of 1200 Hz should be heard for
special
approximately two seconds. After two seconds, the tone
adjustments
should be interrupted at a 2.9 Hz rate.
are required
for secure
3-17
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