5300 ES Series Mobile Radio Operating Manual
4-7
Radio Wide Features
4.10 Surveillance Mode
If the Surveillance mode is programmed, the backlight, all alert tones, and front panel
LED indicator can be disabled individually or totally, based on programming.
The transmit/receive LED indicator, display and keypad backlight, and all alert tones can
be disabled. When setting is enabled, the radio will power up in Surveillance mode with
the selected options active. A function button can also be assigned which will activate and
deactivate surveillance mode at the user’s discretion. It overrides any other programming
of these functions such as a Tone or Backlight option switch.
This feature can be turned ON and OFF by the user if the SURVLC option switch is
programmed. The user selected mode permanently overrides the programmed mode if
applicable.
4.11 Public Address
This feature allows a single microphone to be used for either radio or public address. An
external public address system can be connected to pin 7 of the radio accessory pigtail
cable. This is a low level output, so some sort of PA amplifier is required. The External PA
option switch is required to control this feature.
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.
4.12 Scanning
Scanning monitors the channels in the scan list for messages the radio is programmed to
receive. When a message is detected, scanning stops and the message is received. Shortly
after the message is complete, scanning resumes (unless it has been disabled).
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 off-hook condition is not
detected, 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.
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