TM 11-5895-1412-12&P
COMSEC switch to CT and selecting the same COMSEC key.
A comsec key is a
variable used to enable secure communications.
Two types of COMSEC keys are
used: (1) a traffic encryption key (TEK) may be loaded into channels 1, 2, 3, 4,
or 5 and (2) a key encryption key (KEK) is loaded into channel 6. Have one or
more TEK loaded into your rt before a mission if you need to handle secure
traffic.
You can then exchange secure voice and data with other RT-1523(C)/U
having the same TEK or KEK.
The rt CHAN switch selects a TEK or KEK. You can
keep the same channel but change the TEK scrolling. You can communicate with
other VHF FM radios which are equipped with a KY-57 COMSEC device.
LOADING COMSEC KEY (LOCAL FILL).
Use the following to load the TEK into channel
1, 2, 3, 4 or 5.
Use the same procedure to load the KEK into channel 6.
a.
Turnoff fill device (KYK-13, KYX-15 or KOI-18); then connect the fill cable
to rt AUD/FILL connector.
b.
Set
NOTE: 0
0
0
c.
Set
rt switches:
FCTN to LD, COMSEC to CT.
If COMSEC alarm (beeping alarm) is heard, key handset twice for a
minimum of 1/2 second each key.
If a good COMSEC key is already in the
radio, the alarm clears to no alarm.
If the radio does not have a good
COMSEC key, the alarm clears to a steady tone.
A COMSEC key can only be loaded when a steady tone is present at the
handset.
The steady tone clears to no alarm if fill procedure is
successfully completed.
If the COMSEC alarm does not clear, set FCTN to STBY; then to TST. If
TST results in a “FAIL5” display, there is a COMSEC failure. If “GOOD”
is displayed, resume normal operation.
fill device controls (KYK-13 or KYX-15): Set MODE to ON; then select
COMSEC key to be loaded.
0 If you are using fill device KOI-18, insert tape.
NOTE: If COMSEC keys are required and MAN channel is being used, the COMSEC key
used defaults to the TEK in channel 5.
If necessary, scroll to another
channel containing a TEK and check its validity (refer to step b notes)
before resuming operation.
d.
Load variable:
KYK-13 or KYX-15
Press rt <LOAD/0>. Display flashes “LOAD” then “H TEK”.
Press <STO>; them enter the channel number where TEK is to be stored. Display
blinks and two beeps are heard.
KOI - 18
Press rt <LOAD/0>. Display flashes “LOAD”. Pull tape through reader. Display
shows “H TEK”.
Press <STO>; them enter the channel number where TEK is to be stored. Display
blinks and two beeps are heard.
J-12
