Service manual

OPERATION
3-6
April 2001
Part No. 001-9800-203
(high tier models only). It may also be possible to
enable a reference tone or audio for setting the volume
level using one of the following methods:
• If key press tones have been enabled as described in
Section 3.5.17, a short tone can be enabled by
rotating the select switch (high tier models) or
pressing an option switch.
• If a conventional system is selected, take the micro-
phone off-hook to enable the monitor mode. If
someone is talking, audio is then heard. If nobody is
talking, the squelch control can also be adjusted as
described in Section 3.4.6 and noise should be
heard. Refer to Section 3.9.1 for more information
on the monitor mode. When an LTR system is
selected, the receiver cannot be manually
unsquelched.
3.4.3 BACKLIGHT OPERATION
With high tier models, the display and keypad
backlight can be controlled by the menu BACK-
LIGHT parameter. The three states that can be selected
are Bright, Dim, and Off. It is in the selected condition
whenever power is turned on. If this menu parameter
has been disabled by programming, the backlight is
fixed in one of these states (see Section 3.6.5).
3.4.4 SYSTEM/GROUP DISPLAY
INFORMATION
Low Tier Models
The display indicates the selected system/group
combination from 1-16. These combinations are also
referred to as channels with this transceiver. Any 16
combinations of up to 16 systems with up to 16 groups
each can be programmed. There is no separate group
select function.
The specific system/group selected by each
display number is assigned by programming a channel
table. For example, “1” may select System 1/Group 1,
“2” System 2/Group 1, “3” System 1/Group 2, and so
on. Group alpha tags are not displayed with this
transceiver.
High Tier Models
Up to 100 systems and up to 16 groups per
system can be selected by high tier models. Either the
numeric display mode or the alpha tag mode can be
selected. The display mode is user selectable if the S/G
DISPLAY menu parameter is enabled (see Section
3.6.2). Otherwise, it is fixed by programming.
When the numeric mode is selected, the selected
system and group numbers are indicated on the top
line of the display as Sxx and Gxx, and the group
alpha tag (up to eight characters) is displayed on the
bottom line. For example, System 1, Group 2 (CAR
220) is displayed as follows:
Numeric Display Mode
When the alpha tag mode is selected, the system
alpha tag is displayed on the top line, and the group
alpha tag is displayed on the bottom line. For example,
a “SECURITY” system and “Car 220” group are
displayed as follows:
Alpha Tag Display Mode
3.4.5 SELECTING SYSTEMS AND GROUPS
Low Tier Models
As stated in the preceding section, sixteen
system/group combinations are selectable, and each is
indicated by a number in the display. To change the
selected system/group, press the CHL up/down switch.
Pressing the upper switch increases the number, and
pressing the lower switch decreases the number.
Holding a switch down causes the function to repeat.
System Number
Group Number
Group Alpha Tag
System Alpha Tag
Group Alpha Tag