Band Plans TRX e models

[pyeman99]

In UK & elsewhere there seems concern that the frequency spacing of 3.125 Khz is not available.
From what I read here https://twg-software-downloads.s3.us-east-1.amazonaws.com/docs/TRX1E2E+09C22+Addendum.pdf
It looks like 3.125 should be available if you chose the right band plan & it may not be your country.
Just a thought, if you need 3.125 khz channel spacing, used a lot more now in UK. Use the BE Belgium band plan.
When you want a new config chose the country Band plan that suits your requirement.
Hope this helps somebody.

 

[cherubim]

The band plans need updating. The Australian one still has the MilAir band chopped off at 380MHz. Australia is not the USA and although P25 trunking is sometimes used between 380-400MHz that region still has tactical MilAir frequencies in active use.

 

[pyeman99]

We need to feed this info back & hope changes will be made.In the present scanning UK marine is incorrect has US format. Ch 0 missing etc.Mil air does now end at 380 due to Tetra. Feed it all back.

 

[Ubbe]

In UK & elsewhere there seems concern that the frequency spacing of 3.125 Khz is not available.

As I understand the scanner goes to half steps if you enable flex step. If you have 6,25 in your bandplan and enable flex step you can then enter a 3.125 step size frequency.

Isn't marine frequencies international, so that any ship from any country can use its marine VHF channels anywhere?

/Ubbe

 

[pyeman99]

Good point Ubbe re 3.125, just preferred to put freq in as is. Marine, it is international mostly,do seem to think channel numbering for the US allocation is different to EU. US do not use 156.000 ie UK Chan Zero.Some 157 & 158 khz channels are used in UK for duplex dmr as the mobile tx freq. Some also short term hire. Many older frequency allocation list you see on the web are now out of date. Hard to keep up with some changes. It must make it hard for scanner makers to get the band plans right. Of course user created band plans would be helpful & cover everybody's needs.

 

[Ubbe]

Of course user created band plans would be helpful & cover everybody's needs.

Each country have their own unique bandplan. To make a scanner work in most countries it should have a bandplan where you state a start and stop frequency and what step size and modulation to use. 10 of those ranges are probably enough but no scanner has that. Uniden comes close with some scanners as they use fixed frequency ranges and within that predetermined range you can set a user definable step and modulation. It would be super easy for Uniden to modify a firmware, if they wanted to, to make the bandplan work like the 10 different search ranges you program in many of their scanner models.

/Ubbe

 

[pyeman99]

Ubbe can you put me right here.
I've been looking at scanning Limit Search about 250 to 285 in 25khz steps. For SATCOM
The UK & Irish band plans are stuck with AM I need FM.
It looks like the SWE band plan with do 230.000000 - 379.975000 ..... .... (25 kHz steps/FM perfect.
So make up a new V Folder SATCOM ?
So how do the guys in Sweden scan Mil Air 225 to 399 use a different Band Plan ?

 

[Ubbe]

So how do the guys in Sweden scan Mil Air 225 to 399 use a different Band Plan ?

We use FM in UHF MIL air. I can hear the Gripen fighters 300km away using FM at 267.000MHz

I usually don't use search ranges, and it's one single range setting in TRX when Uniden got 10. I make scanlists with all the channels in a range and that way I can easily name frequencies that gets activity and set different delay times and lights&alerts as well as audio recording individually. And a scanlist with a search range of frequencies can be mixed with other scanlists. Search and scan rates are about the same in TRX.

/Ubbe

 

[pyeman99]

Thanks on this,can see your logic. Will have to make some changes.
Yes a pain not having Custom Search as in SDS.

 

[Ubbe]

I use any of my ARC programs to produce a list of channels for a search range and export that as CSV. Even a demo version can be used and its Easy Fill Channels feature. You might have to import the resulting file into Excel and edit.

Make an export in EZ-Scan and import in Excel to another tab to see the correct syntax used for modulation type and so on and do the same changes to any column to a Uniden CSV file from ARC. Then import the result into EZ-Scan.

/Ubbe