XTS3000 conventional scan

[katt02]

Hi all,

Kind of a tough question here.

There is a trunked system in my area that uses CQPSK to broadcast to the radios, which makes it hard to use with dsd and other softwares. I want to use my radio to NAS basically, without actually programming the control channel. Is it possible to just program in the frequencies the system uses without a control channel and listen to the system that way. I understand that I will not be able to see what talkgroups are speaking or some things like that, but I would like to just monitor it all. I wouls set up a bunch of conventional personalities and add them to a scan list.

Is it possible to program the sites frequencies as conventional p25 channels and prevent them from transmitting or will the channels tell my radio to transmit?


Thanks, Katt

 

[jaspence]

That is possible. When you program the frequencies be sure to click the transmit inhibit box and set at low power. My 3000R shows the 3000 channel number (1,2,3, etc.) and the radio id number. It will not follow a conversation but works like an analog system.

 

[Ant9270]

You’re not going to be able to trunk track without the control channels programmed in. The Non-Affiliate Scan method created by forum member ElroyJetson is proven to work, so I’d program it that way. If you just put the VCs in a scan list and a separate zone, you’ll hear some traffic but you’ll lose the conversation eventually.

 

[katt02]

ok. the only thing that I really care about so to speak is that my radio will not be bricked by the system if I never put a control channel in

 

[Ant9270]

ok. the only thing that I really care about so to speak is that my radio will not be bricked by the system if I never put a control channel in

Make sure you follow the Non Affiliate scan instructions, or it will be a brick. Always remember to slave your personalities to a scan list, and have the TX inhibit concentric switch enabled on top. There’s a lot a lot more to the process than just that, so do some research and get confident with it before you do it. Happy programming

 

[FFPM571]

Hi all,

Kind of a tough question here.

There is a trunked system in my area that uses CQPSK to broadcast to the radios, which makes it hard to use with dsd and other softwares. I want to use my radio to NAS basically, without actually programming the control channel. Is it possible to just program in the frequencies the system uses without a control channel and listen to the system that way. I understand that I will not be able to see what talkgroups are speaking or some things like that, but I would like to just monitor it all. I wouls set up a bunch of conventional personalities and add them to a scan list.

Is it possible to program the sites frequencies as conventional p25 channels and prevent them from transmitting or will the channels tell my radio to transmit?


Thanks, Katt

It is possible to do it this way.. you dont need to follow any NAS programming Set it up as conventional put all the voice channels in one scan list and it works fine... I have a radio doing this right now.. you will hear everything on the site you program and will miss some parts of conversations but its better than nothing

 

[katt02]

Well, I have done it. I put all frequencies into conventional channels and stuff. I have some problems though. I have been using an sdr to see when the system is active and when I am scanning with the radio it will not pick up and signal, but if I go channel to channel, individually I get it. Any thoughts on this?

Also, this is a LSM system so all sites broadcast the same thing, which is why I want to use the radio instead of a scanner; scanners don’t do so well with LSM

 

[Skypilot007]

Well, I have done it. I put all frequencies into conventional channels and stuff. I have some problems though. I have been using an sdr to see when the system is active and when I am scanning with the radio it will not pick up and signal, but if I go channel to channel, individually I get it. Any thoughts on this?

Also, this is a LSM system so all sites broadcast the same thing, which is why I want to use the radio instead of a scanner; scanners don’t do so well with LSM

Did you create a scan list with these channels ? Do you have the proper NAC for each channel ?

 

[katt02]

Yes I have created a dedicated scan list in a dedicated zone. I have programmed in the Mac but I changed it to digital csq. Should I not have done that? Also is there a way to make the radio decode C4FM and CQPSK is just one or the other?

 

[chrismol1]

If the channels are simulcast the astro channels should be set to CQPSK. If your still not receiving try switching the ultra narrow freq to 5.76KHz

 

[katt02]

Thanks for the help. I switched to the 5.76 and I now get around 60-70% of transmission. Thanks for the help

 

[chrismol1]

If it isnt recent, getting it aligned/autotuned will likely bring it higher

 

[katt02]

ok. Is there a way to align the radio with just the tuner software or do I have to bring it to a professional? Also, is there a way to see how out-of-alignment the radio is?

 

[KG4INW]

You need calibrated test equipment. Missing transmissions is a sign of being out of alignment but how far needs to be determined with the aforementioned equipment.

 

[chrismol1]

Than again, if your not doing NAS you'll may very well be missing some communications if your hearing as you say 60% of the conversation

 

[KG4INW]

Ah, good point!