VOICE SECURITY EQUIPMENT TSEC/KY-58

Description- Voice Security Equipment TSEC/KY-58

The voice security equipment is used with the FM Command Radio to provide secure two way communication. The equipment is controlled by the control-indicator (ZAHP). The power switch must be in the ON position, regardless of the mode of operation, whenever the equipment is installed.

CONTROL / INDICATOR

FUNCTION

1. ZEROIZE switch ( two position ) momentary toggle, under spring loaded cover.

Zeroize the KY-58; clears any encoding in the system

2. DELAY switch 2 position toggle.

Used when signal is to be retransmitted.

3. PLAIN-C/RAD1 switch rotary 2 position selector switch.

In the PLAIN position, permits normal ( unciphered ) communications on the associated FM radio set. In the C/RAD1 position, permits ciphered communications on the associated radio set.

4. N/A

5. Fill switch, 6 position rotary switch.

Permits pilot to select one of 6 storage registers for filling.

6. MODE Switch three position rotary.

In the OP position KY-58 normal operation.

In the LD position for filling.

In the RV position KY-58 in Receive-Variable. Filled from another external source.

7. POWER ON switch two position toggle.

Connects power to the associated TSEC/KY-58 cipher equipment in the ON ( forward ) position, and disconnects power from the equipment in the OFF ( aft ) position. Turns on power to TSEC/KY-58.