OPERATION
2-7
November 2001
Part No. 001-7240-001
NOTE: This password is not preprogrammed and
there is no override procedure. Therefore, if it is
forgotten, the transceiver must be reprogrammed to
return it to normal operation.
2.3.8 LOW BATTERY INDICATION
When the battery voltage drops to the point where
recharging is required, the
icon is indicated in
the bottom part of the display. In addition, a beep
sounds when this indication initially appears and
whenever the push-to-talk switch is released (if the
key press tone is enabled). The battery should be
recharged as soon as practical after this indication
appears.
Low transmit power is automatically selected
during a low battery condition (indicated by “
L
” in
display), and the current settings of switches and other
parameters continue to be saved in memory. The low-
battery indication is reset by turning power off and
then on again.
2.3.9 OPTION SWITCHES
This transceiver has three option switches that
can be programmed to control various functions as
described in Section 2.5.1. These switches are the
push-button switch on the top panel, the switch imme-
diately above, and the switch immediately below the
PTT switch on the side panel.
2.3.10 DISPLAYING SOFTWARE REVISION
NUMBER
To display the operating (Flash) software version
number, turn power on with PTT switch pressed. The
version number is displayed as “VER x.xx”. To return
to normal operation, press FCN RCL or cycle power.
The software version number can also be read using
the programmer by selecting the Transfer > Read
Factory Info function (see Section 3.7).
2.3.11 LTR-NET, LTR, AND CONVENTIONAL
OPERATION
Introduction
This transceiver can be programmed to operate in
the LTR-Net, LTR, and conventional modes. Each
selectable system can be programmed to select a
locality programmed for one of these modes. The type
of operation that is programmed is determined by the
type of repeater equipment being accessed. The differ-
ences in operation are described in the following infor-
mation and also noted elsewhere as required.
LTR-Net and LTR Operation
The LTR-Net mode provides the most operating
features. Some features available only in the LTR-Net
mode include roaming (automatic locality search),
unique ID calls, and directed group calls. LTR-Net
features are described in Sections 2.8, and a general
overview of LTR-Net operation is located in Section 6.
Operation in the LTR mode is similar to the LTR-
Net mode except that the preceding and some other
LTR-Net features are not available.The types of calls
that can be placed in the LTR mode are standard group
(mobile-to-mobile) and telephone. LTR features are
described in Sections 2.8 and 2.10 and also in the LTR
Application Note, Part No. 009-0001-020, Rev. 8 or
later.
Both the LTR-Net and LTR modes provide auto-
matic channel selection (trunking) and monitoring
before transmitting. Special tones and display
messages indicate busy and out-of-range conditions.
Telephone calls can be placed almost as conveniently
as with your home telephone. The information
programmed in LTR-Net and LTR systems and groups
is described in Section 2.3.12.
Conventional Operation
In the conventional mode, selecting a system
selects a radio channel, and selecting a group selects
the squelch control coding (CTCSS, CDCS, or carrier)
and other parameters (see Section 2.3.12). The squelch
level must be adjusted manually as described in
Section 2.11.4 to properly receive conventional calls.
With conventional operation, an out-of-range
condition is not indicated by a special tone or display
message because there is no data handshake with a
repeater that allows this condition to be detected. A
busy condition is detected automatically if the
Transmit Disable On Busy feature is used (see Section
2.11.3). Otherwise, it must be detected manually as
follows. Refer to Section 2.11 for more information on
conventional operation.
