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DTMF Keypad - The full keypad DTMF models
include the 12 keys required to dial telephone and unit
ID numbers.
Speaker - The radio speaker is located near the
bottom of the front panel. When a speaker/microphone
is used, it is automatically detected when the Opt Sel 1
line of the accessory connector is pulled low. The logic
then automatically disables the internal speaker.
Figure 2-2 Top Panel Controls
2.2 TOP PANEL CONTROLS
Multi-Function Indicator - Indicates the following
conditions:
Steady Red - Transmitter keyed.
Flashing Red - Low battery in receive mode.
Steady Green - Carrier detected in receive mode.
NOTE: This indicator is disabled if the Surveillance
mode is programmed (see Section 4.7).
On-Off/Volume - Turning the knob clockwise turns
power on and sets the volume level. Turning it coun-
terclockwise to the detent turns power off. The
minimum volume level can be set by programming.
Soft power down can be programmed as described in
Section 3.1.2, and the volume control can be disabled
as described in Section 3.1.3.
Channel Switch - This 16-position switch selects up
to 16 channels in the current zone. Additional zones
can be programmed to allow up to 512 channels to be
selected by this switch. This control can be disabled as
described in Section 3.3.
Rotary Option Switch - This is a three-position
switch that can be programmed to control various
options. The "A" position is "on" and the "B" and "C"
positions are "off" (see Section 4.1). When this switch
is programmed to select zones, "A" selects Zone 1,
"B" Zone 2, and "C" Zone 3 if applicable.
Antenna Connector - Connection point for the
antenna. Make sure the antenna is tight before using
the radio.
Emergency Switch - This switch or some other option
switch can be programmed as an Emergency switch to
alert a dispatcher of an emergency condition. Refer to
Sections 5.10 and 6.10 for more information. This
switch can also be programmed for other functions.
2.3 SIDE CONTROLS
Figure 2-3 Side Controls and Jacks
PTT (Push-To-Talk) Switch - This switch is pressed
to turn the transmitter on to transmit a message. It is
then released to listen. Transmitting is indicated when
the top panel indicator is constant red or
displayed (surveillance mode only, see Section 4.7).
Option Switches 1, 2, and 3 - Each of these switches
can be programmed to control a specific function (see
Section 4.1). In addition, they can be programmed for
11
CONTROLS AND DISPLAY
is
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