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8. Enter a new Spacing Frequency with the keypad.
Note: You can only enter within a range of 5-100 kHz, and
5 or 7.5 or 12.5 kHz multiples.
9. Press E.
The display changes for entering the Offset Channel.
10. Enter a new Offset Channel with the keypad. The offset
Channel for the first set should be CH380.
Note: You can only input within a range of 380-759.
11. Press E.
The display changes for entering the Base Frequency.
12. To exit from this mode, press MENU repeatedly.
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 BC785D 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 - /0: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 / 1:TRUNK - select bank number - (only when 800 MHz system is selected) /
:CNTRL CH ONLY.
You must choose one of 4 frequency plans (only when 800 MHz system 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.
M
CH 380
ENTER CHANNEL
OFFSET CHANNEL1
M
50.0
ENTER FREQUENCY
SPACE FREQUENCY1
BC785D 11/8/2 1:01 PM Page 66