Table 3-2. AN/ARC-220 Messages (Cont)
ERROR MESSAGE ACTION
TIME SYNC FAIL Radio failed in attempt to synchronize.
TRANSEC FAIL BIT detected a failure that will not allow ECCM operation.
TUNE XX% Indicates percentage of ECCM frequencies tuned for current net.
TUNING Radio is currently tuning itself.
TX DEGRADED BIT detected a failure that is causing transmission capability to be degraded.
TX FAIL Radio cannot transmit.
UNSYNC ECCM is not synchronized.
UNTUNED An ECCM hop set is not tuned.
XMT READY Radio is ready to transmit in ECCM mode.
ZEROIZED All mission data.ll and keys have been erased.
3.10 TSEC/KY-100 SECURE COMMUNICATION SYSTEM.
The TSEC/KY-100 provides secure, half duplex voice, digital data, analog data and remote keying capabilities for transmission over the HF radio. It has six operational modes, and can store often used settings on presets. Power is supplied from the No. 1 dc primary bus through a circuit breaker marked HF SCTY SET.
3.10.1 Controls and Functions. The KY-100 is con-trolled by the AMS with the CDU (Figure 3-2). Pilot input is through a control screen (Figure 3-15), accessed by pressing INI, then FILL soft key, then KY-100 soft key. Indications and soft key functions are as follows:
3.10.1.1 KY RTU Screen. Mode screen:
SOFT KEY FUNCTION
gINIT KEY Selects operating modes.
gUP ARROW Acts as an up arrow key.
gRIGHT Acts as the right arrow key.
ARROW
SOFT KEY FUNCTION
gBOTH Same function as pressing both ARROWS arrow keys at the same time.
PT/CTs Toggles between plain text and cipher mode voice.
OFFLINEs Off line mode disables communications and accesses screens to select mode settings, test, and .ll screens.
ZERO ALLs Erases all keys in the unit except the emergency backup key.
3.10.2 Starting Procedure.
3.10.2.1 Cold Start. A cold start is performed when there are no traffic keys in the KY-100 at start up.
1.
Access KY-100 screen by INI, then FILL soft key, then KY-100 soft key -Press.
2.
OFFLINE soft key -Press. TEST will be dis-played.
SK.1
SK.6
SK.2
SK.7
SK.3
SK.8
SK.4
SK.9
SK.5
SK.10
AB0614
SA
3. UP ARROW soft key -Press. KEY OPS will 9. On KYK-13, place Fill switch to next .ll.
be displayed.
10. Repeat steps 6 through 9 for each key .ll re-
4. Connect KYK-13 KY-100 .ll port on lower quired for loading.
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