TACN

[18bravo]

Could someone share the band plan for this system. Thank you in advance.

 

[Nchpiboy]

Will this help:
Band Plans | RadioReference.com Forums

 

[18bravo]

Will this help:
Band Plans | RadioReference.com Forums

I believe it’s a non standard band plan. I was hoping somebody was running Unitrunker. Thank you though.

 

[GTR8000]

Why would it be non-standard? It's an ASTRO 25 system with the majority of sites being 700/800, so it likely uses the common (mostly default) MSI TDMA ASTRO 25 Channel ID plan. Unless you're visiting soon and happen to be in one of the areas covered by a VHF site, in which case I guess you'll have to either wait for someone to post the entire band plan, or figure out a way to capture it when you get there so you can program one of your myriad APX that you're so fond of showing off! 🤓

 

[surfacemount]

There's a large thread tacked at the top of this subforum, but if you learn anything, I'm subscribed. I'd like to have a working TACN codeplug for the APX8000 just to look at.

 

[18bravo]

There's a large thread tacked at the top of this subforum, but if you learn anything, I'm subscribed. I'd like to have a working TACN codeplug for the APX8000 just to look at.

Message me

 

[GTR8000]

The band plan was posted too many times to count in that TACN thread. 🤦‍♂️ I've submitted the table to the RRDB so it'll get added soon I'm sure.

 

[18bravo]

The band plan was posted too many times to count in that TACN thread. 🤦‍♂️ I've submitted the table to the RRDB so it'll get added soon I'm sure.

Roger that

 

[18bravo]

Why would it be non-standard? It's an ASTRO 25 system with the majority of sites being 700/800, so it likely uses the common (mostly default) MSI TDMA ASTRO 25 Channel ID plan. Unless you're visiting soon and happen to be in one of the areas covered by a VHF site, in which case I guess you'll have to either wait for someone to post the entire band plan, or figure out a way to capture it when you get there so you can program one of your myriad APX that you're so fond of showing off! 🤓

I know it’s not standard because it’s not working for a client. I run into this about 1 in every 30 systems I program. The band plan is always culprit when it lands on the TG and doesn’t unmute. This is on the 700/800 side not the VHF.

 

[GTR8000]

I know it’s not standard because it’s not working for a client. I run into this about 1 in every 30 systems I program. The band plan is always culprit when it lands on the TG and doesn’t unmute. This is on the 700/800 side not the VHF.

If the usual first four 700/800 Motorola elements aren't working, then something else is going on, because that's what TACN uses. 800 FDMA, 700 FDMA, 800 TDMA, 700 TDMA like the majority of ASTRO 25 systems out there.

 

[18bravo]

Yes but for the TDMA on channel 3 and 4 sometimes they like to change the channel spacing up from 12.5 to 6.25. Also sometimes channel 3 isn’t 851.0125 they change it up I’ve seen 851.00625 among other frequencies. Then I’ve also seen some funky channel orders in TDMA systems.
Like I said it’s about one out every thirty systems I program for clients. If you like I can send some pictures of Motorola phase 2 with totally crazy ID settings.

 

[GTR8000]

Yes but for the TDMA on channel 3 and 4 sometimes they like to change the channel spacing up from 12.5 to 6.25. Also sometimes channel 3 isn’t 851.0125 they change it up I’ve seen 851.00625 among other frequencies. Then I’ve also seen some funky channel orders in TDMA systems.
Like I said it’s about one out every thirty systems I program for clients. If you like I can send some pictures of Motorola phase 2 with totally crazy ID settings.

There are always exceptions, however TACN is not one of them, so the point is moot. If your "client" has the common Motorola P25 700/800 ASTRO 25 ID table entered correctly, and still can't receive anything on the 700/800 sites, then something else is wrong.

 

[18bravo]

There are always exceptions, however TACN is not one of them, so the point is moot. If your "client" has the common Motorola P25 700/800 ASTRO 25 ID table entered correctly, and still can't receive anything on the 700/800 sites, then something else is wrong.

Certain talks groups (TDMA) are not unmuting. Anyways thanks for your help.

 

[buddrousa]

The short answer is if you are programming TACN Radios for Clients then you have a INSIDE TRACK to the data. If not you may be barking up the wrong tree.

 

[GTR8000]

I get the impression that "client" in this context means someone he's setting up non-affiliate scan for remotely, not an actual agency authorized on the system. He's in the Tampa Bay area, nowhere near Tennessee. Either way, the first four elements are the same as 90% of ASTRO 25 systems, so assuming that's what's in the codeplug, and assuming that the radios are actually TDMA capable and provisioned properly...something else is going on. Could be something simple that was overlooked in the codeplug.

 

[buddrousa]

I agree but still with my TACN contacts I know TACN is cut and dried standard P25 Bandplan.

 

[GTR8000]

I agree but still with my TACN contacts I know TACN is cut and dried standard P25 Bandplan.

Well, not quite. For the 700/800 FDMA/TDMA elements, yes. The VHF elements are non standard, however, because there is no such thing as "standard" VHF band plan elements.

 

[buddrousa]

In W TN we have 3 VHF sites if I remember but was referring to the 700 800 sites

 

[18bravo]

I get the impression that "client" in this context means someone he's setting up non-affiliate scan for remotely, not an actual agency authorized on the system. He's in the Tampa Bay area, nowhere near Tennessee. Either way, the first four elements are the same as 90% of ASTRO 25 systems, so assuming that's what's in the codeplug, and assuming that the radios are actually TDMA capable and provisioned properly...something else is going on. Could be something simple that was overlooked in the codeplug.

Client was fouled up on his sites. Band plan is standard as you said.

 

[radiocrazy123]

I do not understand why people stick with M, and tippy-toe non-affiliate trunking scan non-sense. Just use a BK radio or Harris for crying out loud. Heck, BK will even give you tech support. M is awesome, but not for Rx only monitoring trunking systems.