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TM 11-5821-285-12-1
Section II. COMMAND POST OPERATION
ARC-51BX con-
Function select switch.......
OFF
3-3. General
trol head-sta-
Preset channel selector ....
1
a. The AN/ASC-15A(V)1 includes controls for three
tion 3-(V)2
SQ DISABLE switch..........
OFF
operator positions controlling three ARC-131 radios
only
Frequency selector
(VHF-FM) or an ARC-164 in number 3 FM station. The
switches ............................
as
ARC-131 radios can be encrypted with TSEC/KY-28's
desired
but not the ARC-164.  The AN/ASC-15A(V)2 has two
ARC-164 radio
Function switch ................
MAIN
ARC-131 radios and two associated TSEC/KY-28's, the
MANUAL-PRESENT-
third station controls the ARC-51BX radio or the ARC-
GUARD switch...........
MANUAL
164 radio.
SQUELCH ........................
ON
b. The console may be operated in four separate
SQ-MN ..............................
modes:  receiver  monitoring,  two-way  voice  com-
counterclockwise
munications, intercommunication between operators, or
until noise is heard. Then
secure/nonsecure automatic retransmission. Any of the
turn control clock-
three VHF-FM radios may be used to receive or transmit
wise until receiver is
plain or ciphered communications.  Refer to KAM-
quiet. Turn clockwise
248A/TSEC manual listed in appendix A.
an additional 1/8
turn.
Function switch .................
BOTH
3-4. Preliminary Starting Procedure
NOTE
Prior to energizing the console, the following controls
Main receiver
should be set to the positions specified below to
SQUELCH must be in
establish the system in a preoperational, shutdown
the ON position.
condition.  When performing the preliminary starting
ICS box-stations 4,
RECEIVERS switch (4) .........  off
procedure, make sure the AN/ASC-15(A)V(*) CONSOLE
(down)
circuit breaker is in the OFF (out) position.
5 and 6, (V)1 and
RECEIVERS NAV switch ......  off
(down)
Console Controls
POWER switch ...............
OFF
(V)2 versions
RECEIVERS INT switch .......  off
(V)1 and (V)2
INT circuit breaker ...........
out
(down)
FM-1 circuit breaker  ........................................
out
VOL control ..............counter-
FM-2 circuit breaker  ........................................
out
clockwise
FM-3 circuit breaker  ........................................
out
Transmit-interphone
SEC circuit breaker
........................................
out
selector switch ............. PVT
ICS box-stations 1 RECEIVERS 1, 2, 3, 4
3-5. Cable Connection for Command Post Operation
and 2, (V)1 and
switches.......................
off (down)
(V)2 versions
RECEIVE RS NAV switchoff
(down)
a. Ensure cable connector No. 49 is connected to
RECEIVERS INT switch .....................................
off (down)
VOL control
counter-clockwise
b. Ensure plug P1 (35), plug P2 (35), plug P1 (36),
Transmit-interphone
and plug P2 (36) are connected to their respective KY-
selector switch ......PVT
28's or to the bypass box (fig. 3-7).
FM control head-
Mode control switch ........
OFF
stations 1, 2
VOL control .....................
counter
c.   Ensure cables for the HYL-3 regenerative-
and 3
clockwise
repeater are properly stowed.
SQUELCH switch ............
DIS
d. If the RT-1167/ARC-164 is to be used, ensure
Frequency selector
that both ends of its cables are properly connected (para
switches (4) .....................
optional
1-12 and para 2-3a).
KY-28 control
POWER ON switch .........
OFF
e.  Secure retransmission system monitor KY-28
head
PLAIN/CIPHER switch ....
PLAIN
connector No. 56 on connector No. 52 and the HYL-
RE-X/REG switch ............
REG
3/TSEC No. 53 (RT-1) connector and No. 55 (RT-2)
ZEROIZE switch..............
off (down)
KY-28 control
POWER ON switch .........
OFF
connector to the two bypass connectors No. 60. The X-
head stations
PLAIN-CIPHER ...............
PLAIN
mode connector No. 47 is held by the clamp directly
1, 2, and 3
RE-X/REG.......................
REG
below the bypass connectors, and power connector No.
ZEROIZE.........................
off (down)
59 is attached to the lower clamp.
Remaining
connectors are attached for normal command post
operation (para 3-7). 3-6. Starting Procedure
The console controls shall be set according to
preliminary starting procedure (para 3-4). Take note
of the following to ensure proper operation of the
3-11


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