KG-65 is manpack portable.
KG-75 is for shipborne and airborne operation.
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DESCRIPTION OF CONTROLS
Refer to above graphic.
1) RMT-LOCAL-SIG CLR switch - Selects operating mode.
a) RMT - In this position, the PLAIN/ CIPHER selection is controlled
by input outside the KY-75 control panel.
b) LOCAL - In this position, transmit mode is controlled by PLAIN/
CIPHER switch.
c) SIG CLR - In this position, if
a fill device is connected to the FILL connector, the alarms will be set,
and the selected fill register will be cleared. Upon release of the switch
(it is spring loaded to the LOCAL position) the TSEC/ KY-75 will request
a fill variable from the fill device. If fill device is not connected,
a steady tone signal will be transmitted to all other units within the
net, indicating a desire to establish communications on that link.
2) PLAIN/CIPHER switch - Selects plain or cipher mode.
a) PLAIN - The TSEC/KY-75 system will receive cipher and plain signals
and will transmit plain.
b) CIPHER - Permits ciphered communication. (
3) P WR/FILL switch - Controls set power and fill positions.
a) OFF/ZEROIZE. All power is removed from the TSEC/KY-75 system
and all fill registers are zeroized. (To enter this position, the switch
must be pulled out and rotated counterclockwise.)
b) 1,2,3 fill positions. These positions are used to select the
fill register of the TSEC/ KY-75 system to be used during transmission
and reception of ciphered messages.
4) ALARM indicator. This indicator illuminates when a fill error, randomizer, or battery failure occurs. The indicator includes a press-to-test feature.
5) PLAIN indicator. This indicator illuminates when the PLAIN/CIPHER switch is set to the PLAIN position. The indicator includes a press-to-test feature.
6) CIPHER indicator. This indicator illuminates when the PLAIN/CIPHER switch is set to the CIPHER position. The indicator includes a press-to-test feature.
7) SIG/CIPHER RCV indicator. This indicator (blue) blinks continuously when the TSEC/KY-75 system is receiving ciphered text. The indicator includes a press-to-test feature.
8) PWR indicator - This indicator (white) illuminates when power isapplied to theTSEC/KY-75 system and the PWR/FILL switch is set to one of the numbered fill positions.
(9) FILL connector. This connector, located on the front of the TSEC/KY-75 control panel allows connection to a fill device.
(10) Processor connector. This connector, located on the back of theTSEC/KY-75 control unit, allows connection of the control unit to the processor via a cable.
When aircraft power is not applied to the TSEC/KY-75 and the standby fill batteries have been removed or are too weak to maintain the memory circuits, all storage registers of the TSEC/KY-75 will be zeroized within approximately 45 seconds.
OPERATING PROCEDURES
A) TSEC/KY-75 System Turn-on Procedure:
1. PWR/FILL switch is set to any fill register
number. Check that PWR indicator light is illuminated. 2. PLAIN/CIPHER
switch to CIPHER. Check that CIPHER indicator light
is illuminated.
3. PWR/FILL switch is set to each fill register (1 thru 3).
If the position has not already been filled a steady alarm tone will be
heard.
B) Filling TSEC/KY-75 Using General Purpose Tape Reader (KOI-18/TSEC):
1. FILL connector Connect to tape reader using fill cable (ON5124204).
2. PWR/FILL switch Set to register to be filled.
3. Insert the tape leader into the
IN slot on tape reader. Line up tape feed
holes with the white dots on tape reader.
4. RMT-LOCAL-SIG CLR switch Set to SIG CLR clear then release.
5. Pull tape through tape reader at a moderate rate. The steady
alarm tone heard over the headset should stop, indicating a
successful fill.
6. Repeat procedure for each register to be filled.
C) Filling TSEC/KY-75 System Using Transfer Device KYK-13/TSEC:
1. Verify that the transfer device contains the variables
in its registers that are indicated on its writing
surface by:
a. Transfer device mode
switch OFF/CK.
b. PWR/FILL switch Set
to register to be verified.
c. Transfer
device initiate button Press and release.
Transfer device indicator light will flash if the register contains a variable.
d. Repeat
procedure for each transfer device
register to be verified. NOTE Insure that the rubber
grommet is in the KYK-13/TSEC P1 connector
and that the TSEC/KY-75 PLAIN/CIPHER switch
is in the CIPHER position.
2. FILL connector Connect to transfer device (either directly or with a fill cable).
3. Transfer device FILL switch Set to register containing variable to be transferred.
4. Transfer device MODE switch ON.
5. RMT/LOCAL/SIG CLR switch . Set to SIG CLR and release. Parity indicator light on transfer device should flash, and the steady alarm tone in the headset should cease, indicating a successful transfer of the variable.
6. Repeat procedure for each TSEC/ KY- 75 register to be filled.
7. Transfer device mode switch Set to OFF/CK and disconnect from TSEC/KY-75
D) TSEC/KY-75 Secure Voice Operating Procedure:
1. PLAIN/CIPHER switch to CIPHER. Check that CIPHER indicator
light illuminates.
2. RMT/LOCAL/SIG CLR switch to RMT.
3. PWR/FILL switch - Set to desired fill register.
4. Microphone switch - Press. Wait for the preamble to stop, then
talk into the microphone.
5. Microphone switch - Release. Wait for the postamble
to stop.
The SIG/CIPHER RCVindicator light will flash during receipt of secure voice communications. After receiving a secure communications, wait until the postamble stops before initiating any transmission.
E) TSEC/KY-75 Clear Voice Operating Procedure:
1. PLAIN/CIPHER switch to PLAIN. Check that PLAIN indicator light
illuminates.
2. RMT/LOCAL/SIG CLR switch to RMT.
3. Microphone switch - Press to talk, release when finished.
F) Zeroizing the TSEC/KY-75:
1. PWR/FILL switch OFF to ZEROIZE.
2. The steady alarm tone should be heard if the PWR/FILL switch
is set to any fill position
All three fill registers of the TSEC/KY75 will be zeroized simultaneously. When aircraft power is not applied to the TSEC/KY-75 and the standby fill batteries have been removed or are too weak to maintain the memory circuits, all storage registers of the TSEC/KY-75 will be zeroized within approximately 45 seconds.
Reference: Technical manual TM 55-1510-220-10
