SDR trunk NBFM help

[noamlivne]

I would also consider that SDRtrunk is very not-sensitive. Things that you pick up and decode in SDRSharp and FMPx (DSDPLUS fastlane) and with a scanner, are not received well in SDRTRUNK.
I am talking about the same dongle and antenna - just the software changes.
I hope Denny, the developer, will be able fix it one of these days

 

[Dog]

As on Facebook have you tried to listen to the actual signal in SDR#? If you can dial in on the specific frequency there you will know what settings you need in SDR Trunk.

 

[PDXh0b0]

A little new to SDR trunk I'm trying to figure out NBFM I have the alias setup right it's like a dead channel I'm not sure if it's in the gain control or the squelch.. I had the gain setting on auto. I'm using RTL V3 dongle two of them. The frequency I was trying to monitor. Also tried Noaa weather with no results.. but can pick it up on my police scanner.. anybody have any suggestions? Thanks.

So just focusing on your problem, creating NBFM channels (within the same sample rate) and only hearing one.

Each NBFM created needs a different talk group identifier (Talkgroup to Assign) number.

Otherwise you'll only hear one transmission, with noaa you will only hear the first o e you click play on as it is a constant transmission.

So if you added a bunch of conventional NBFM channels for with a sample rate of 2.048 between 153.6 - 155.6, and all your talkgroup identifiers are set to the default 1, it's only going to pick up one active transmission at a time.

I added 32 conventional frequencies in that sample rate range , took a minute to figure out why it was only catching one frequency at a time

Hope this helps

 

[Lbz7]

i have tried everybody suggestions but has not worked.it's like channel is dead. i have tried other NBFM channels with the same result.

 

[dave3825]

What is your gain setting?

 

[Lbz7]

What is your gain setting?

327.

 

[PDXh0b0]

on the tuner says 0155.614902 im trying to monitor 155.6400

What type antenna and it's location?
That's barely a signal...

Perhaps find something between 150.00 - 156.00

 

[Lbz7]

I have tried a couple of local public services agencies.. with the same result I don't know if it's a software issue on my computer or not.. My DMR and p25 work perfectly.. thanks for all the help once again!!!

 

[Lbz7]

All the channels that I do in NBFM. It's like the channels are dead..

 

[PDXh0b0]

P25 and dmr signals are pretty strong, where I use to live I could do the simulcast system with stud earrings in the dongles. It looks like your not getting much signal wise

 

[Lbz7]

P25 and dmr signals are pretty strong, where I use to live I could do the simulcast system with stud earrings in the dongles. It looks like your not getting much signal wise

Noaa weather comes in pretty good on SD Sharp. It has five bars of signal on my SDS 200. With the same antenna.. I'm not sure if it's some type of driver issue on my computer or not.. I cannot get any NBFM. To work lol.🥺

 

[dave3825]

If noaa comes in good in sdr sharp, and on your sds200 with the same antenna, are you switching to that antenna or splitting its signal to feed the 200 and sdrtrunk?

 

[Lbz7]

I'm switching the antenna.. like I mentioned before it's every NBFM.

 

[dave3825]

To rule out the nbfm set up, could you stop the tuner if it is playing, and then go to the tuner tab, click on the tuner and manually to an active freq in the nbfm range and post a screenshot? Like this?

 

[Lbz7]

pic

 

[Lbz7]

The frequency I'm trying to monitor is 162.550.on the dongle it's showing 162.525.. I don't know if that's the problem or not.. but I tried to change it on the tuner tab and I re-click play on players list and it goes back to the 162.525 on the dongle.

 

[PDXh0b0]

If you are using one of those antennas that come in a kit, the coax they ship in notoriously awful, if you have the telescopic with the magnetic base, stick it to something metal like a baking pan

The frequency I'm trying to monitor is 162.550.on the dongle it's showing 162.525.. I don't know if that's the problem or not.. but I tried to change it on the tuner tab and I re-click play on players list and it goes back to the 162.525 on the dongle.

That's the center of your 2.4 sample rate, shouldn't be the problem

 

[Lbz7]

If you are using one of those antennas that come in a kit, the coax they ship in notoriously awful, if you have the telescopic with the magnetic base, stick it to something metal like a baking pan
That's the center of your 2.4 sample rate, shouldn't be the problem

I have tried different antennas and coax with the end same results on NBFM. I'll have to mess with it later tonight.. thank you for your help once again!!!