How if find Setting Band Plan for Trunking VHF

[BorisG]

See what this does:

------------------------------------------------------
           Low     High             Base
Table     Chan     Chan   Offset    Frequency    Step
------------------------------------------------------
  0        380      [COLOR=Red]559[/COLOR]      0      141.31250    12.50
  1        [COLOR=Red]560[/COLOR]      759      0      160.63750    12.50

Enter both tables.

The numbers in red may require some adjustments.

If there are transmissions you are missing, the scanner should still flash an invalid frequency. Write down any frequencies that flash but nothing was heard.

WAIT TO TALK

 

[talkpair]

I think voyager and I are pretty much in agreement on this one.

The problem is determining where Table 0 should end and Table 1 should begin.

Here's a spreadsheet that makes it easy to see what is going on.

https://docs.google.com/spreadsheets/d/174-eKTv0E_MkcKiwSAJbslTWDoi4VIdBXuiPaGLiwTc/edit?usp=sharing

Site 48 shows LCN 565 active. It's really close to where I've put the dividing line in the tables.
It's important now to see if you really hear anything on 167.7 or if the radio just flashes that frequency.
If it only flashes, the table's dividing line needs to be moved further down in the spreadsheet, and the tables adjusted accordingly.

 

[BorisG]

I see you're working online to excel
Thank you very much!!!

Frequency of listening I found the new system
168.8375
169.0875
169.1500

NO HAVE LNC
soon have...


I did not understand your request?

 

[BorisG]

I think voyager and I are pretty much in agreement on this one.

The problem is determining where Table 0 should end and Table 1 should begin.

Here's a spreadsheet that makes it easy to see what is going on.

https://docs.google.com/spreadsheets/d/174-eKTv0E_MkcKiwSAJbslTWDoi4VIdBXuiPaGLiwTc/edit?usp=sharing

Site 48 shows LCN 565 active. It's really close to where I've put the dividing line in the tables.
It's important now to see if you really hear anything on 167.7 or if the radio just flashes that frequency.
If it only flashes, the table's dividing line needs to be moved further down in the spreadsheet, and the tables adjusted accordingly.

the control frequencies on 146mhz and 169mhz has the same system ID 3d3dh, i think it's a nationwide system with a lot of repeaters

Something strange ...
I look at UniTrunker and I see that LCN 736 is talking on the 146.400 control channel but the scanner can't listen to the voice frequency with the BandPlan I entered
then i tried to hold on the frequency as it shows in the excel " 150.51250 " and i see in Unitrunker that it's active but can't hear nothing in the scanner.

 

[talkpair]

If you entered the bandplan correctly, channel 736 should resolve to a frequency of 169.8375 not 150.5125.

 

[BorisG]

If you entered the bandplan correctly, channel 736 should resolve to a frequency of 169.8375 not 150.5125.

Ok I understand now the table.

Now I listened to quickly find (no trunk) frequency 169.8375 HOLD - good!

When he see UniTruker talk... (Call) ...

i realy listen on 169.8375 talk (Quick Serech Only)

but bandplan dont know to move me

my bandplan in uniden its.
table 0 low 141.3125 up 148.300 step 12.5
table 1 low 167.6375 up 170.125 step 12.5
i use exel to know up

I know there's already a post above this, but I figure I might as well post
Now I have a Base Frequency, Spacing, and Offset. Taking a quick look at the BCD396XT, you will need to find the upper base frequency. Uniden has provided a Excel Spreadsheet for finding that.

i radioshack i have other problem
i use
00 chlo 380 chhi 559 offset 0 141.3125 12.5
01 chlo 560 chhi 759 offset 0 160.6375 12.5
Sometimes you do not hear anything ...
Sometimes hear of poor quality
Sometimes you hear a noise in the background Trunking

 

[BorisG]

I find more control sites
-Site30-
158.2*

-Site37-
157.8750*

-Site11-
146.3750*

 

[talkpair]

There is nothing you can do to the band plan to resolve a reception problem.

It's only function is to provide values to solve a math problem.

Depending on the software you use to program your radios, your Uniden may need a band plan that looks like this:

--------------------------------------------------------------
                   Band Plan for Uniden Radios
--------------------------------------------------------------
 Band    Lower          Upper             
 Plan    Base Freq      Base Freq     Offset     Pol   Spacing
--------------------------------------------------------------
  1      146.06250      148.30000        380      +      12.50
  2      167.63750      170.12500        560      +      12.50

-Site30-
158.2*

-Site37-
157.8750*

Need LCN's on those two.

 

[BorisG]

More info of the new controls

-Site30-  Tone 76.60
	LNC 577 158.2*
	LNC 656   0.0000
	LNC 708   0.0000**
	LNC 733   0.0000**
	LNC 757   0.0000

-Site37- Tone 105.88
        LNC 426       0.0000**
        LNC 460       0.0000
        LNC 495       0.0000
	LNC 551	157.8750*
        LNC 619       0.0000

-Site11- Tone 83.72
        LNC 389   0.0000
        LNC 405 146.3750*
	LNC 432   0.0000
	LNC 486   0.0000**
	LNC 632   0.0000

 

[talkpair]

If LCN 551 is 157.875 on Site 37 and 146.375 on Site 11, then there is no way to make one table work for all sites

 

[BorisG]

If LCN 551 is 157.875 on Site 37 and 146.375 on Site 11, then there is no way to make one table work for all sites

-Site11- Tone 83.72
        LNC 389   0.0000
        LNC 405 146.3750*
	LNC 432   0.0000
	LNC 486   0.0000**
	LNC 632   0.0000

(I updated the previous message)

 

[talkpair]

Rather than a minute-by-minute update of your findings, I suggest you collect as many LCN frequency relationships as you can find and post them in a couple days.

Double check everything before you post.

 

[BorisG]

Rather than a minute-by-minute update of your findings, I suggest you collect as many LCN frequency relationships as you can find and post them in a couple days.

Double check everything before you post.

OK
Using information
Who until now
There is no way of knowing BANDPLAN ?

 

[Voyager]

If there are 150 frequencies in the 500 LCN area, there may be a third table involved.

But, if there are duplicate LCNs on two sites using different frequencies, then as talk said (or implied) you may need to make more than one system with different tables - maybe even one for each site.

Try the table I mentioned on only one Site and see if it works. That would be:

------------------------------------------------------
           Low     High             Base
Table     Chan     Chan   Offset    Frequency    Step
------------------------------------------------------
  0        380      559      0      141.31250    12.50
  1        560      759      0      160.63750    12.50

Get one site "working" and then we can move on to another which may use different tables.

 

[Voyager]

BTW, the 160 MHz frequencies you posted support the second table I originally posted, so that should work on the site you got them from.

 

[BorisG]

BTW, the 160 MHz frequencies you posted support the second table I originally posted, so that should work on the site you got them from.

Meanwhile, I found a serious error
I had a mistake on site 147.300 LT SYSTEM (SITE 15)
Not tied to system we work
This affects the settings you I check?

I work about new list... give me A few days
It is important for you to know what Groups Talk talk every per site?

It is normal?

 

[BorisG]

Meanwhile, I found a serious error
I had a mistake on site 147.300 LT SYSTEM (SITE 15)

 

[talkpair]

When monitoring distant sites it is important to remember that there is no guarantee that the voice channels will work just because the control channel can be decoded.

The voice channel used on that distant site may be used for something else locally.

I have this problem with the state's VHF trunked system I monitor. There is no solution.

If site 15 is local and you feel that you are missing something, monitor 166.625 and 156.975 for activity that you think may be a part of this site

 

[Voyager]

I'm really starting to think each site has its own bandplans.

 

[mikewazowski]

If this is a Motorola system, there should only be one bandplan composed of up to 3 ranges.

I think the biggest problem you're facing is the confusion over what frequency goes with which logical channel number.

Does anybody have a concise list of verified frequencies and lcn's?

A local vhf system had a 3 range system which was easy to figure out once I knew exactly which frequencies and lcn's belonged together.