Service manual

OPERATION
3-3
April 2001
Part No. 001-9800-203
3.2 CONTROLS
3.2.1 LOW TIER CONTROLS
The low tier transceiver is shown in Figure 3-1,
and the controls operate as follows.
PWR Switch - Pressing this switch turns power on
and off. The current state of this switch is stored by a
capacitor for approximately a week. Therefore, if
power is removed from the transceiver (such as if
power is switched by a relay), the selected state does
not change. The vehicle ignition switch may also
control power as described in Section 3.5.12.
VOL Up-Down Switch - Pressing the upper part of
this switch increases the volume by one step and
pressing the lower part decreases it by one step. Hold-
ing the switch down causes the function to repeat. The
volume is adjustable in 64 steps (see Section 3.4.2).
CHL Up-Down Switch - Pressing the upper part of
this switch increases the selected channel (system/
group) by one and pressing the lower part decreases it
by one. After the highest programmed channel is
displayed, the wrap-around tone sounds and the
display rolls over to the lowest programmed channel
and vice versa. Holding the switch down causes the
function to repeat.
NOTE: Any of the following four switches can be
disabled by programming if desired.
Scan Switch - Turns system scanning on and off (see
Section 3.7).
A/D (Add/Delete) Switch - Programs the system scan
list. The displayed system/group is not
in the scan list
(not scanned) when “–” is indicated on the left side of
the display (see Section 3.7.2).
AUX1, AUX2 (Auxiliary) Switches - These switches
can be programmed to control two of the following
features (see Section 3.5.1):
• Encryption
• Horn alert
• Home system/group
• Monitor
• Option (dealer installed)
• Priority sampling (conventional only)
• Squelch adjust
• Talk-around
Microphone Jack - Connection point for the micro-
phone and also the RPI programming interface when
programming the transceiver.
Microphone Push-To-Talk (PTT) Switch - Keys the
transmitter.
Speaker - A speaker is located behind the grille. An
optional speaker can be connected to the external
speaker jack (see Section 3.2.3). The internal speaker
is disabled when an external speaker is used.
3.2.2 HIGH TIER CONTROLS AND INDICATOR
The high tier transceiver is shown in Figure 3-2.
The high tier option switches are all programmable, so
the function of each switch can vary from those
shown. The controls and indicators operate as follows:
On-Off/Volume - Pressing the knob turns power on
and off. The vehicle ignition switch may also control
power as described in Section 3.5.12. Rotating this
knob sets the volume level (see Section 3.4.2).
Select Switch - This switch changes the selected
system or group and is also used in the menu mode
(see Section 3.6) and other times. When changing the
system/group, turning this switch clockwise increases
the selected system or group, and turning it counter-
clockwise decreases the selected system or group. To
switch between system and group select, press this
switch. Refer to Section 3.4.5 for more information.
This control also has two alternate functions that
are selected by first pressing the FCN option switch.
Refer to Section 3.5.8 for more information.
Tri-Color Indicator - Indicates the following
conditions:
Red
- Transmitter keyed, normal power output
Orange
- Transmitter keyed, power reduced by
thermal foldback circuit
Green
- Busy conventional channel (carrier detected).
If this indication appears but no message is
heard and Call Guard squelch is
programmed, a call for someone else was
probably detected.