APX 4500 O2 CH
8
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IDENTIFYING RADIO CONTROLS
Multi-function Knob (MFK)
The MFK button on your radio is programmable to the
following features :
Mode Change – Press the MFK once and turn
clockwise to scroll the channel list.
Volume Change – Turn the MFK clockwise or
counterclockwise to adjust the volume level of the speaker.
The volume level can be adjusted in 16 steps or 32 steps. A
fast turn of the MFK adjusts the volume level in 16 steps with
large
increments in volume level. A slow turn of the MFK adjusts
the volume level in 32 steps with small increments in volume
level.
The display shows the volume level and bars to indicate the
current level. The level of last selected volume when your
radio
powers down remains the same when the radio powers up.
The main display shows the icon of the secondary feature.
The main display does not show the icon of primary feature.
Your radio by default is set to use the primary feature. Short
press the MFK to toggle it to work on either the secondary or
primary feature.
The concentric ring LED on the multi-function knob will blink
in green when the knob is set to secondary feature.
The secondary feature has an inactivity timer. This timer
starts when the secondary feature is idle. The radio returns to
primary
feature when the timer expires.
If the MFK is set to operate only one feature, it is
recommended that it be set to Volume Change.
Consult your dealer or system administrator for the best
option available for MFK.
Multi-function Knob (MFK)
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