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Note: • If the system is not tracking properly, you may need
to try a new Base Frequency or Offset Channel or
you may be missing frequencies from the system.
• You can set up to three Base, Spacing and Offsets
for Motorola VHF/UHF trunked systems.
Toggling the Status Bit
On Type II trunking systems there is a method by which
specialized types of communications utilize unique talkgroup
numbers. An emergency call will occur on a unique talkgroup
from its primary assignment, for example. Because the
BC250D defaults to Status-Bit ON mode, you never need to
worry about missing these transmissions. If you have
programmed talkgroup 33264 into Scan List memory, for
example, and there is an emergency call within the group,
you will hear it on 33264.
The only time you may wish to turn Status Bits OFF is if
you're trying to figure out the proper Fleet Map of a Type I
trunking system. To turn Status Bits OFF, enter into the Menu
mode and select 2:SCAN OPTION / 2:TRUNK - select
bank number - / 9:STATUS BIT. (This feature does not
apply to EDACS and LTR operation within the scanner.) Then
rotate the VFO to change the setting (1:ON to 2:OFF) and
press E to program your change.
Control Channel Only Mode
When this function is activated, trunking is performed using
Control Channel data only. Voice channel (also known as
"DATA channel") frequencies do not have to be programmed
into memory. This feature only applies to Motorola 800 MHz
and 900 MHz systems.
To turn this function on, choose Motorola 1:TYPE2 800
or 3:TYPE2 900 or 2:TYPE1 in the Menu mode. Then
set to the desired control plan by selecting 2:SCAN
OPTION / 2:TRUNK - select bank number - / :CNTRL
CH ONLY.
You must choose one of 4 frequency plans (only when 800
MHz systems is selected) before you begin to Control
Channel Trunk. The default, Plan 1, is the most common.
Read the description of the Plans below for details on which
may apply for you.
PLAN 1: Use Plan 1 if the last three digits of ALL the
frequencies in use end in one of the following three digits:
125, 375, 625, or 875 (example: 856.1125, 860.7375,
859.6625, 855.8875).
BC250D 11/6/2 11:37 AM Page 73