Service manual

PROGRAMMING
4-16
April 2001
Part No. 001-9800-203
4.6.8 SETUP/CHANGE UNIQUE ID
This function is not available with LTR 98xx
transceivers. It is used to program the unique ID in
Multi-Net models.
4.6.9 CHANGE MODEL/BAND/RANGE/TIER
This function allows a file programmed for one
type of transceiver to be converted for use as a basis
for programming another type. Any parameters that
may no longer be valid such as bandwidth or channel
frequencies are automatically changed to valid values.
4.7 ADDITIONAL PROGRAMMING
INFORMATION
4.7.1 REPEATER NUMBER PROGRAMMING
Each LTR repeater site can have up to 20
repeaters. The repeaters at the same site are assigned a
unique number from 1-20. Although these numbers
can be assigned arbitrarily, for maximum system effi-
ciency a scheme should be used which equalizes, as
much as possible, the gaps between numbers. For
example, a five-repeater system should use numbers 1,
5, 9, 13, and 17. The number assigned to a repeater is
programmed in the repeater and the mobiles assigned
to that home repeater.
4.7.2 CHANNEL NUMBER PROGRAMMING
NOTES:
FCC channel numbers are not used to program this
transceiver.
Never program transmit frequencies in the 406-406.1
band which is reserved for distress beacons.
The channel numbers used to program this trans-
ceiver come from the channel table. This table is
programmed by pressing the F6 key in the Main Radio
Parameters screen described in Section 4.6.2 and then
entering frequencies for the desired channels. Each
table is four pages long and can be programmed with
up to 126 channels. Other pages are displayed by
pressing the F5 and F6 keys.
With low tier models, one channel table can be
programmed, and with high tier models up to three
tables (378 channels) can be programmed. The chan-
nels assigned to a system must come from the same
table. Therefore, with high tier models, the channel
table used by the system is one of the programmable
system parameters. The 12.5/25 kHz IF bandwidth
parameter applies to only 800 MHz channels because
900 channels are always 12.5 kHz.
4.7.3 SPECIFYING RIC-EQUIPPED RE-
PEATERS
When programming the channel numbers of LTR
and conventional systems, you can specify if the
repeater is equipped with an EFJohnson repeater inter-
connect (RIC) or telephone interconnect (TIC)
controller. If a system with a transmit ID code
programmed for interconnect is then selected, the
transceiver will attempt to access only repeaters speci-
fied as equipped with this controller. This allows both
interconnect and non-interconnect repeaters to be
programmed in each selectable system.
Without this feature, the transceiver may trunk to
a repeater not equipped with an interconnect controller
when a telephone call is made. No dial tone or other
supervision is then returned when the PTT switch is
released which may be confusing to the user.
4.8 UPDATING RADIO SOFTWARE
4.8.1 INTRODUCTION
The transceiver operating software (firmware)
can be updated in the field without replacing the
microcontroller or a memory device such as an
EPROM. For example, the radio software may be
updated to correct software bugs or add feature
enhancements. This is made possible by the use of a
reprogrammable Flash memory device (see Section
1.2.7).
The same basic hardware used to program
personality information is also used to update radio
software. One difference may be the Remote Program-
ming Interface (RPI). To update the radio software,
RPI, Part No. 023-9800-000, is required. Earlier RPI’s
such as the 023-9750-000 or 023-5810-000 do not
work.