General Dynamics R2600 Series, Operator'S Manual, Page: 219 / 402

13-7.1.3 Encrypt Self Test
A self test of the encryption functions is
performed at power up. The "Encrypt Self Test:"
field in the SET UP display (figure 13-6)
indicates the results of the self test, passed or
failed.
13-7.2 Programming with Test Key
Connect the proper key loading cable between
the Key Variable Loader port of the analyzer
(figure 11-1) and the programming port on the
radio (refer to radio operator's manual).
To program the radio with a test key, place the
cursor in "Display:" field in the Display Zone.
Select SET UP using the
SET UP
softkey. This
accesses the SET UP display screen (figure 13-6).
Move cursor to "Algorithm Sel:" field and select
desired algorithm using softkeys (figure 13-7).
Move cursor to "Key Type:" field.
Apply power to the radio if not already on.
Select
key load radio
softkey. This will exercise
the Key Variable Loader feature of the R2670
and start an automatic transfer of the test key
from the analyzer to the radio. The R2670 will
display "Radio key load complete."
To verify that a key has been loaded into the
radio, disconnect the key loading cable, turn the
radio off then back on. If the key load was
unsuccessful, the radio will display key fail if it
has a visual readout or will make an audio sound
to indicate key fail.
CAUTION
Disconnect the key loading cable before
continuing. Testing the radio with the key
loading cable still connected could result in
loss of the key.
To test the radio with the analyzer, be sure TEST
KEY is displayed in the "Key Type:" field. This
completes test key loading. It is all right to exit
the SET UP screen.
13-7.3 Programming with External Key
You can use a customer key to program the
analyzer and operate in private mode with a
keyed radio. The customer (external) key, once
loaded, is saved in memory by the analyzer until
the operator erases it. The key is stored in non-
volatile memory and will be retained even if
power to the analyzer is turned off.
13-7.3.1 Connecting the Key Inserter
The key inserter plugs into the Key Variable
Loader (KVL) port (figure 11-1) on the side of
the analyzer opposite the carrying handle.
Connect the key inserter to the analyzer and then
use the following instructions to load the external
key.
CAUTION
Use only DX, or any KVL 3000 with the ASN
option, key loaders. Other types of key
loaders (AX, BX or CX) may cause the
encryption hardware to malfunction. To
recover, press the encrypt reset softkey under
the “Special Functions” (SPF) menu.
13-7.3.2 Loading External Key
To initiate loading an external key, place cursor
in "Display:" field in the Display Zone and select
SET UP mode display using the
SET UP
softkey.
Move cursor to "Algorithm Sel:" field and select
desired algorithm using softkeys (figure 13-7).
Move cursor to "Key Type:" field.
Press the load ext key softkey to initiate the key
load sequence.
Push the switch on the key inserter to begin
loading. This activates the programming
function. When programming is complete, the
key inserter displays "pass" if the key load
procedure was successful. The analyzer displays
a message Ext key passed." If the key load
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