AOR ARD9900 Operating Manual page 27

Fast radio modem, multi-mode and digital voice interface
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Mode
Features
Setting
Flag
Algorithm
Function
Encrption
Squelch
Air Key at RX
end
Air Key TX
Rolling Code
Mode Code
Remarks
Random Encrption Mode 4
Communication can be made with the station that has Flag
40 or Flag 50. (The Master key and algorithm must be set
to the same value.)
50
80-99
Yes
Yes
Use the Air Key in the transmit data
Send the random coded Air Key from the transmit end
Will change in every 20 mSec according to the algorithm
3
Once algorithm is set to the same, communication can be
made with the statation that has Flag 40 or Flag 50.
Since the Air Key is sent from the transmit end, it is not
necessary to have the same Air Key with the receive end.
The code will be scramblked and will change in every 20
mSec.
26

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