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Trunking Control Channel Decoding For discussion of installation, setup, configuration, and use of the Trunker / Unitrunker digital decoding utilities (for decoding Trunking control channels)

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Old 07-25-2009, 10:40 PM
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Join Date: Feb 2003
Posts: 61
Smile T88 Bandplan setting for 800MHz

I noticed the frequencies showing up are incorrect for my system,which is a non rebanded 800MHz type 2 analog.I have four frequencies 857.2125 to 860.2125 in the program.I noticed frequencies in the 853.xxxx populating the list out of range.I need the proper spacing,offsets for the CTL file,can someone please help?
Thanks. Tony.
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Old 07-28-2009, 07:27 AM
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Join Date: Sep 2002
Location: Toronto, Ontario
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While editing the system's Base Frequency parameter, you can press the Ctrl-H help key and get the following info:

[ Base Frequency ]
For 8OO MHz and 9OO MHz systems, set Base Frequency to the appropriate
"bandplan number": 8OO. = standard 8OO MHz system; 8O1. = splinter 8OO MHz system;
8O2. = rebanded 8OO MHz system; 8O3. = Australian 8OO MHz system; 9OO. = 9OO MHz
system. TRUNK88 will use the "bandplan number" to generate appropriate values for
all base, step and offset fields. For VHF and UHF systems, this value defines the
lowest frequency used by the first TX channel range; the correct value varies by
system and it often defines the lowest TX frequency that the system can use.
Base frequency, step size and offset values are used by TRUNK88 to automatically
calculate the actual frequencies used by a system. Note: after editing a system's
bandplan, you can use the System Menu / Apply Current Bandplan dialog to recalculate
all existing channel frequencies.


Just pick the appropiate bandplan number (800., based on your description) and then apply the updated bandplan.
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