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MM23772, Rev. F
58
9.2.1 Buttons and Knobs
This section describes the primary function of the button and knob controls. Other functions associated
with these controls are detailed in later sections.
POWER ON-OFF
VOLUME KNOB
Applies power to and adjusts the receiver’s volume. Rotating the control clockwise
applies power to the radio. A single alert tone (if enabled through programming)
indicates the radio is operational.
Rotating the control clockwise increases the volume level. Minimum volume levels
may be programmed into the radio to prevent missed calls due to a low volume
setting. While adjusting the volume, the display will momentarily indicate the
volume level (i.e. VOL=40). The volume range is from a minimum programmed
level of zero (displayed as OFF in the display) up to 40, which is the loudest level.
CONTROL KNOB
Selects systems or group/channels (depending on programming). This is a 16-
position rotary knob.
Note: A mechanical stop, which can limit the positions accessed, is shipped with
the radio but must be installed. To install the mechanical stop, remove the channel
knob, loosen the set screw on the channel knob metal base (using a 1.27mm hex
wrench), and remove the channel knob metal base. Replace the 16 channel ring
with the channel stop ring located at the desired channel. Reinstall the channel
knob metal base, tighten the set screw, and reinstall the channel knob.
EMERGENCY/
HOME BUTTON
Automatically selects the pre-programmed Group/System by pressing and holding
for a programmed duration. It can also be used to declare an emergency by
pressing and holding for a programmed duration. The button must be pre-
programmed for either operation, but not both.
PTT BUTTON
Push-To-Talk must be pressed before voice transmission begins. In trunked mode
the radio’s ID is transmitted upon depression of the PTT button. Refer to Figure
9-1 for t
he location of the PTT button.
SIDE OPTION
BUTTON 2
Exits the current operation (removing all displays associated with it) and returns
the radio to the selected talk group. Terminates individual and telephone
interconnect calls.
SIDE OPTION
BUTTON 1
Activates one of a number of programmable software options selected during PC
programming. Programmable options include hi/low power settings, keypad lock,
LCD contrast, LCD and keypad back lighting.