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8. Disconnect the cable from the control unit's microphone connector. Press
the
(Scan Model) or
C
load operation. The radio will change to the selected group or channel as
indicated in the display.
Displaying The Currently Used Cryptographic Key
Number
To display the cryptographic key currently in use for either the system en-
cryption key (for special call such as individual, phone, all, agency or fleet)
or the group/channel key (for group or conventional calls), perform the fol-
lowing procedure:
1. Press the
m
2. Use the
,
press the
m
3. Then use the
key or the group/channel key.
ENCRYPTION KEY DISPLAYED
System
Group/Channel
Key Zero
All cryptographic keys can be zeroed (erased from radio memory) by press-
ing the
button (System Model) or
c
pressing this button, press and hold the
(Scan Model). Press both buttons for 2 seconds. A series of warning beeps
will begin at the start of this 2 second period and then switch to a solid tone
after the keys have been zeroed. The display will indicate "KEY ZERO".
If the cryptographic key(s) are zeroed, one or more keys must be transferred
from the Keyloader into the radio before private communications may con-
tinue.
c
button.
or
button (ramp control) to select "DISP KEY". Then
.
button.
,
button to toggle between displaying the system
,
.
(System Model) button to exit the key-
MESSAGE DISPLAYED
"SYS KEY"
"KEY = 1"
"GRP KEY"/"CHN KEY"
"KEY = 2"/KEY = 2"
(Scan Model) and while still
C
button (System Model) or
o
O
49
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