E F Johnson Company 2425770 Benutzerhandbuch

Viking Portable 600 Radio Operating Manual

6-13

If Emergency Hot Mic has been enabled for emergency calls, automatic transmitting 
occurs with microphone audio unmuted without having to manually press the PTT switch. 
The automatic transmit period is programmed for 10-120 seconds in ten-second intervals. 
If the “Increment by 1” option is enabled, the automatic transmit period is programmed for 
1-12 seconds in one-second intervals. If this feature or emergency calls are not enabled by 
programming, automatic transmitting does not occur. This feature is initiated only on the 
first press of the Emergency button. Subsequent presses do not trigger automatic 
transmissions. To reset this function, cycle power or press and hold the Emergency button.

1 If required, select a channel of a system on which Emergency Calls are enabled and 

press the Emergency option button or select that menu parameter. The Emergency 
Alarm is then sent as described in Section 5.9.1, Emergency Alarms if applicable.

2 Emergency Alarm entry is displayed upon the pressing of the Emergency button. 

Console Ack is displayed when an ack is received back from the console for an 
Emergency Alarm, indicating that the dispatcher acknowledges the emergency. 
Emergency Exit is displayed when the user presses and holds the emergency button. 
Below are the tones for Emergency. 

3 If the preceding Emergency Hot Mic feature is enabled, the call is automatically 

transmitted without pressing the PTT switch. If it is disabled, press the PTT switch and 
begin speaking as with a standard call.

4 All group calls which follow are then emergency calls (private, telephone, and call alert 

calls are not allowed). If the channel is changed, the call is made on the emergency 
talkgroup programmed for the new channel. If the Surveillance Mode is enabled (see 
Section 4.10, Surveillance Mode), the radio will behave in accordance to the individual 
surveillance mode options. If “No Receive Activity During Emergency” is 
programmed, receive audio and the front panel LED are disabled in the receive mode.

5 To exit this mode, cycle radio power or press and hold the Emergency button.

Console 

Acknowledgement

Emergency Alarm 

Ack

Emergency Alarm 

Acknowledged 

Successful

Two 1000 Hz 175 ms tones with 

50 ms spacing followed by Three 

1000 Hz 175 ms tones with 150 

ms spacing

Emergency Alarm 

Entry

Emergency Button 

Press

Emergency button has 

been Pressed

1000 Hz continuous tone for 175 

ms.

Emergency Exit

Emergency Canceled Emergency is 

Canceled

1000 Hz continuous tone for 1 

sec.