E F Johnson Company 2425M80 Benutzerhandbuch

Draft 02 - Sep 1 2015

7-6

The encryption icon 

 (Standard Control Head) or 

 (Lightning Control Head) 

flashes whenever a secure call is received or transmitted. Other operation is as follows:

• The icon is always displayed when the radio is in secure mode and receives a clear call 

on a digital and P25 trunking channel.

• An option can be programmed to sound a beep whenever a secure call is received on a 

clear channel.

Certain options are available when transmitting and receiving when encryption is selected.

The following transmit options are available when encryption is selected:

Clear - All calls are in the clear mode.

Secure - All calls are made in the selected secure mode.

Switched - The mode is selected by the Clear/Secure switch. When the clear mode is 
selected by this switch and a secure call is received, or vice versa, you will hear a beep. 
Press the programmed option button to change to the appropriate mode. When the clear 
mode is selected by this switch, “CLEAR” is flashed, and when the secure mode is 
selected, “SECURE” is flashed.

If the channel has been strapped “Clear” and the option switch selects the “Secure” mode 
on power up and a transmission is attempted, “CLEAR ONLY” is displayed and 
transmitting is disabled. Likewise, if the channel is strapped “Secure” and the option 
switch selects the “Clear” mode on power up and a transmission is attempted, “SECURE 
ONLY” is displayed and the transmitter is disabled.

The radio can be programmed to ignore the “Clear” or “Secure” switch setting. The 
preceding indications then do not occur and transmissions always occur in the strapped 
mode.