How if find Setting Band Plan for Trunking VHF

[BorisG]

opsss

 

[BorisG]

Channel=LCN?

 

[nd5y]

Yes. LCN=Logical Channel Number

 

[BorisG]

Accurate Information
146.0650 site 40 LCN 380
146.1650 site 41
146.400 site 31 LNC 407
146.650 site 23
146.900 site 39
147.300 Site 15 LCN 479
147.600 site 26 LCN 503
Listen from control site 31 (146.400):
147.0600
147.0650
147.0850 LCN 462
147.0900
147.5000
147.4000 LCN 487

What now?

I try
ch-lo 380
chi-hi 725
offset 5000
BaseFreq 146.005000
step 5.0

Now show me RadioID Talk but jump frequency Listen not good

 

[talkpair]

I'll check it out.

Those frequencies look totally different

 

[BorisG]

I'll check it out.

Those frequencies look totally different

Yes, it is exact details
I need help in calculating

 

[Voyager]

Try this:

ch-lo 380
chi-hi 725
offset 5000
BaseFreq 141.3125
step 12.5

Also, I think some of your frequencies are "off", as you can't have two channels 5 kHz apart like 147.085 and 147.090. I believe the correct channel for both is 147.0875 MHz.

Here is the table showing your freq, LCN, and calculated freq based on the above table: (sorry for the formatting issue)
146.065 380 146.0625
146.400 407 146.4000
147.300 479 147.3000
147.600 503 147.6000
147.085 462 147.0875
147.400 487 147.4000

 

[BorisG]

Try this:
ch-lo 380
chi-hi 725
offset 5000
BaseFreq 141.315000
step 12.5

I try this...
no work
scanner try to listen from 216.00250
show the radioid talk

 

[talkpair]

I see two different plans:

------------------------------------------------------
           Low     High             Base
Table     Chan     Chan   Offset    Frequency    Step
------------------------------------------------------
  0        380      759      380    146.06250    12.50

and

------------------------------------------------------
           Low     High             Base
Table     Chan     Chan   Offset    Frequency    Step
------------------------------------------------------
  0        380      759      380    146.06500    12.50

More information is needed on the site using 147.06 and 147.085.
Those two frequencies are using yet a third plan.

Pick one table or the other for a site.

 

[Voyager]

Please note the minor change I made to the table base frequency just as you were posting.

Maybe the step should be in MHz not kHz? Try .0125

It's been a while since I had to program a bandplan.

But, the table should work, as the channel numbers match all your frequencies within 2.5 kHz.

 

[BorisG]

I see two different plans:

------------------------------------------------------
           Low     High             Base
Table     Chan     Chan   Offset    Frequency    Step
------------------------------------------------------
  0        380      759      380    146.06250    12.50

and

------------------------------------------------------
           Low     High             Base
Table     Chan     Chan   Offset    Frequency    Step
------------------------------------------------------
  0        380      759      380    146.06500    12.50

More information is needed on the site using 147.06 and 147.085.
Those two frequencies are using yet a third plan.

Pick one table or the other for a site.

I heard some
It's still not perfect

 

[BorisG]

how i know Type FleetMap?

 

[slicerwizard]

A VHF fleetmap has to be Type II.

 

[talkpair]

After studying this further, I think there is really only one bandplan. (Unless this system also uses the 168-171 MHz frequencies you talked about earlier)

Of the two plans I provided, the correct one uses the base frequency of 146.0625 mHz....

Shown in green below are the frequencies I believe are correct.
Shown in red are the ones I feel are incorrect.
The actual frequencies in use are probably those listed in the center column.

The base frequency of 141.3125 that voyager provided also works if the offset value is set to 0 instead of 5000.

 

[BorisG]

NEW INFO:

** Control Chanles (Color red in UniTrunker)
* What is? (Color Yellow in UniTrunker)


I try

(147.3000 - 146.0625) / (479 - 380) = 1.2375 / 99 = 0.0125 (Step)
Offset 380 (dont know way?)


146.0625 - ((380 - 380) x 0.0125)) = 146.0625
146.0625 - (62 X 0.0125) = 145.2875
145.2875 - 0.775 =
144.5125 its ok?

base 144.5125
step 12.500
offset 380
ch-hi 736
ch-lo 380

no work...
I worked hard and no results ...

 

[SCPD]

Red is current active control channel. The yellow / tan channels are alternate control channels.

 

[BorisG]

strange problem,
site 31 ok
site 26 I hear only some of the calls
Way?

thx

 

[Voyager]

After studying this further, I think there is really only one bandplan. (Unless this system also uses the 168-171 MHz frequencies you talked about earlier)

Of the two plans I provided, the correct one uses the base frequency of 146.0625 mHz....

Shown in green below are the frequencies I believe are correct.
Shown in red are the ones I feel are incorrect.
The actual frequencies in use are probably those listed in the center column.

The base frequency of 141.3125 that voyager provided also works if the offset value is set to 0 instead of 5000.

As I said above - been a while since I programmed a bandplan. I thought the offset was the TX offset. But, I feel the base and step are correct, as they match the posted criteria (freq/channel). You also said better what I was getting at about "wrong frequencies".

 

[Voyager]

strange problem,
site 31 ok
site 26 I hear only some of the calls
Way?

thx

How strong is Site 26?

As was suggested, try this:
ch-lo 380
chi-hi 725
offset 0
BaseFreq 141.3125
step 12.5

 

[BorisG]

How strong is Site 26?

As was suggested, try this:
ch-lo 380
chi-hi 725
offset 0
BaseFreq 141.3125
step 12.5

Way Chi-hi 725?