Draft 02 - Sep 1 2015
Viking Mobile Radio Operating Manual
4-9
Radio Wide Features
In the public address mode, microphone audio is always routed to the PA system, and the
radio can be programmed so that receive audio is also routed. When the PA is enabled/
disabled, “EXT PA ON/OFF” is displayed momentarily. The radio can also be
programmed to display “EXT PA ON” continuously. A button/menu function also allows
the user to turn the “Receive Audio to External PA” function on and off.
The cable, Part No. 597-5357-716.01 (Single Remote Control Head) or 597-5357-741.01
(Dual Remote) allows the radio to directly interface with a Federal Signal Omega 90
external PA amplifier without an intervening siren control box. For the mute indication to
be sent to correctly to the amplifier, the radio Aux B output must be configured for “Ext
PA Mute Inv”. This setting provides a mute signal on Aux B just like the existing “Ext PA
Mute” setting, only with opposite polarity as required by the amplifier.
4.12
Scanning
Scanning monitors the channels in the scan list for traffic the radio is programmed to
receive. When traffic is detected, scanning stops and the message is received. Shortly after
traffic is complete, scanning resumes.
The user can enter the scan list edit mode for the selected scan list while the radio is
scanning without manually turning scan off. If the user presses the scan edit button while
the radio is scanning, the radio shall stop scan and enter directly into scan list edit mode
for the selected scan list. The scan edit mode shall timeout after seven seconds of
inactivity. If the scan edit mode times out, or the user exits the mode via the exit button or
the scan list edit function button, the radio shall save the changes to the scan list and restart
scan.
If the microphone off-hook condition is detected (Hangup Box Monitor selected by
programming), scanning stops and selective squelch (such as Call Guard CTCSS or NAC/
group ID detect) is disabled on conventional channels. If the microphone off-hook
condition is not detected (Hangup Box Monitor is not programmed), taking the
microphone off-hook has no affect on radio operation. When a call is received in the scan
mode, the alias of the channel on which a call is received (and any other display
parameters that may be programmed) are displayed until scanning resumes. The selected
channel alias is then displayed if applicable.
There are two scan modes available: Priority (standard) and Radio Wide. The operation of
the priority type is unique to the system type programmed on the selected channel, and the
operation of the Radio Wide type is the same regardless of the system type programmed
on the selected channel. Only one type of scanning can be enabled at a time. For example,
if priority scanning is enabled and Radio Wide Scan is enabled, priority scanning is
automatically disabled and vice versa. Refer to the following for more information.
