User manual
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Scrambler 
Press the key programmed as [Scrambler] to toggle Scrambler on/off. 
Note: Emphasis/de-emphasis features are turned off when scrambler is activated and 
turned on when scrambler is deactivated.   
GPS Report 
When GPS receiver is installed, press the key programmed as [Send GPS] to transmit 
your position data. 
HDC2400 
. HDC list 
1.  Press [HDC List] key (programmable key) to view the preset HDC list item number or 
name on the display. 
2.  Turn the selector knob to select the desired HDC list item number or name. 
3.  Press the PTT key to complete the call. 
HDC can achieve the following functions: selective call (individual call, group call, zone 
call, and broadcast), call alert and system function (stun, kill, revive, check) etc. 
Short Message 
  Since Short Message function is realized through HDC2400
TM
, the channels of the 
receiver and sender should be configured with optional signaling HDC2400
TM
. 
  Via multi level menu operation, short messages can be edited, saved, viewed, sent, 
protected and deleted. Press [Message] key (programmable key) in user’s mode to enter 
Short Message Menu. 
  “Receive Msg” Inbox can receive 38 messages at the most, with no more than 48 
characters in each one. 
  “Message sent” Outbox can save 8 messages at the most, with no more than 48 
characters in each one. 
  “Fixed Message” box can save 32 messages at the most, with no more than 31 
characters in each one. 
  The main operation flow is illustrated as follows:   










