3.
Connect the Keyloader cable to the UDC on
the radio.
4.
Press the PWR button on the Keyloader and
wait for the Keyloader to display "MASTER
MODE".
5.
Press the TRN button on the Keyloader. If
necessary, select a different cryptographic
key to be transferred into the radio.
6.
Turn the radio on. The display should read
"KEY LOAD".
7.
Press the EXE button on the Keyloader to
transfer the key. The Keyloader will display
"GOOD 1.x TRANSFER" where "x" is the
selected cryptographic key number.
8.
Disconnect the cable from the radio’s UDC.
A single beep will be heard from the radio’s
speaker if the power-up alert tone is enabled.
The radio will change to the selected group
or channel as indicated in the display.
Key Zero
All cryptographic keys can be zeroed or "dumped"
when the radio is on by simultaneously pressing the
STEP and 2nd buttons for at least one second. When
the key(s) have been zeroed, the radio will display
"KEY ZERO" and it will emit a series of beeps. If the
cryptographic key(s) are zeroed, one or more keys
must be transferred into the radio from the Keyloader
before private communications may continue.
The cryptographic keys stored in DES version radios
can also be zeroed using two (2) additional methods.
Removing the battery pack for several minutes (typi-
cally three), or disassembling the radio will zero all of
the cryptographic keys stored in a DES version radio.
Receiving An Encrypted Message
When receiving, the radio automatically switches be-
tween clear or private operation. If the transmission
being received is an encrypted transmission, it will be
decrypted, the "PVT" status flag will flash, the receiver
will unsquelch, and the message will be heard in the
speaker. For this to occur, the selected group or
channel must be programmed for private operation
and the correct cryptographic key must be loaded into
the radio.
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