Table 3-3. Control Indicator C-8157/ARC, Controls and Indicators (fig. 3-3)
POWER switch (two-position locking toggle).
Applies or removes power (28 vdc) to associated KY-28 cipher
POWER ON Indicator.
Lights when power is applied.
Selects clear (PLAIN) or encrypted (CIPHER) mode of operation on
associated FM radio.
Lights when FM radio is in clear (PLAIN} mode.
Lights when FM radio is in encrypted (CIPHER) mode. (CIPHER
indicator will light with or without KY-28 installed).
ZEROIZE switch (two-position locking toggle switch Normally in off (down) position. Placed in on (up) position during
under spring loaded cover).
emergency situations to neutralize and make inoperative the
associated KY- 28 cipher equipment.
RE-X/REG switch (two-position locking toggle).
RE-X ....................... Permits ciphered communication through
a retransmission unit at a distant
location. (Not used in normal console
REG ........................ Permits normal ciphered communication
Figure 3-3. Control, Radio Set C-7088/ARC-131.