| Control / Indicator |
Function |
| 1. |
POWER ON Switch Two Position Circuit
Breaker
|
Connects power to the associated TSEC/KY-28
cipher equipment in the ON (forward position, and disconnects power from
the equipment in the OFF (aft) position.
NOTE
Switch must be in the ON (forward) position for operation
in the PLAIN or CIPHER mode
|
| 2. |
POWER ON Amber Indicator (With Dimmer Switch) |
Lights when the associated POWER ON switch is
placed in the ON (forward) position. |
| 3. |
PLAIN CIPHER Switch (Two Position Locking
Toggle) |
In the Plain position, permits normal (unciphered)
communications on the associated FM radio set. In the CIPHER position,
permits ciphered communications on the associated radio set.
|
| 4. |
PLAIN (Red) Indicator (with Dimmer Switch) |
Lights when the associated PLAIN-CIPHER switch
is in the PLAIN position. |
| 5. |
CIPHER (Green) Indicator (with Dimmer Switch) |
Lights when the associated PLAIN CIPHER switch
is in the CIPHER position. |
| 6. |
RE-X-REG Switch (Two-Position Locking Toggle) |
In the RE-X position, permits ciphered
communications through a retransmission unit (at a distant location). In
the REG position, permits normal ciphered communications or clear text. |
| 7. |
ZEROIZE Switch (Two-Position Locking
Toggle, Under Spring Loaded Cover)
|
Normally in OFF (aft) position. Placed in ON
(forward) position during emergency situations to neutralize and make
inoperative the associated TSEC/KY-28 cipher equipment. Do not place the
ZEROIZE switch in the ON (forward) position unless a crash or capture is
imminent.
|
| 8. |
Panel Lights |
Illuminate the control indicator (controlled by
aircraft panel lights).
|
The TSEC/KY-28 voice security equipment is used with the VHF/FM radio set to
provide secure two-way communications. The equipment is controlled by the
control indicator mounted near the rear of the pilot right console.
