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Emergency Operation
Either control unit (active or idle controller) can declare an emergency,
provided radio has been pre-programmed to enable emergency declaration. If
the idle controller declares an emergency, control is switched to the idle
controller and any current transmission from the previously active controller is
terminated.
Siren And Light Control
Siren and light control is only available from the control unit that is pre-
programmed for these functions. Typically, the control unit at the driver's
location would be programmed. The control unit that has these functions
programmed can activate them regardless of whether it is an active or an idle
controller.
Dual Control Audio
Audio output during dual control operation is a pre-programmed function.
Default operation routes audio only to the active controller.
MULTIPLE RADIO OPERATION
Orion mobile radio may be configured to operate in a multiple radio mode that
permits more than one radio to be controlled from a single control unit or
control location. The radios could be different frequency splits,
trunked/conventional, etc.
In the multiple radio operation, the radios continue to operate as individual
radios except with a common control unit. The control unit is used for display
and control. The control unit display is shared by the multiple radio units and,
when selected, a radio can be controlled by the control unit.
For multiple radio operation the control unit keypad must be pre-programmed
for a variety of multiple radio buttons such as radio selection and radio mute.
Changing Selected Radio
A radio unit may be selected by pressing the radio selection button (pre-
programmed) on the control unit. Also, a button may be pre-programmed to
rotate selection through the radio units; e.g., if radio #1 is selected, pressing
the radio select button will select radio #2. Similarly, radio #2 will be selected
if the radio select button is pressed when radio #1 was selected.
