Unitrunker question

[jrl44430]

Does unitrunker decode digital audio? All I get is the discrminator noise.

 

[Whiskey3JMC]

Straight from the website:

Protocols Decoded​

• APCO P25
• EDACS 4800
• EDACS 9600
• Motorola
• MPT1327

 

[maus92]

P25 Phase 1 only.

 

[jrl44430]

Why am I only getting discriminator noise only?

 

[maus92]

Can you be more specific? Can you post screenshots of your VFO tab? My guess is you need to mute the audio of the signal VFO, but without specifics, its hard to tell.

 

[RaleighGuy]

Why am I only getting discriminator noise only?

You need two VFOs a signal VFO and a voice VFO

 

[jrl44430]

 

[RaleighGuy]

View attachment 153618

The middle window in the screenshot, STOP, the click on info, top block INFO put 1 in SIGNAL (should be there already) and 1 in VOICE, click on VFO 1 (signal) mute it put yes by mute, VFO 2 voice put no by mute.

 

[maus92]

As I suspected, you are getting audio from the Signal role VCO. You need to check the Mute checkbox to eliminate the noise. To receive tg audio, you need to configure a Voice role VCO. Also, you are using the previous version of Unitrunker. I suggest using Version 2.1.

 

[RaleighGuy]

@jrl44430 I agree with @maus92 update to V2.1 and you'll have better experience

http://www.unitrunker.com/download.html

For more information check here

 

[jrl44430]

Thank you for all the help. I will work on this my next day off. Thanks again.

 

[dave3825]

Pretty sure vb or vac cables running into dsdplus are needed on the older version of Unitrunker. Newer version will decode and play phase 1 audio right out of the speakers. Cables needed if using Trunking Recorder.

Not sure, but does UT 2 allow use of discriminator?

 

[RaleighGuy]

Pretty sure vb or vac cables running into dsdplus are needed on the older version of Unitrunker. Newer version will decode and play phase 1 audio right out of the speakers. Cables needed if using Trunking Recorder.

Not sure, but does UT 2 allow use of discriminator?

Thanks @dave3825 I hadn't noticed he was using discriminator tap, V2 only uses SDRs, but I don't think cables were need if monitoring straight from UT1 (I could be wrong though, been a number of years since I used V1).

@jrl44430 see post #8 for instructions to try, one additional step is on the voice VFO under AUDIO select your speakers.

 

[jrl44430]

@jrl44430 I agree with @maus92 update to V2.1 and you'll have better experience

http://www.unitrunker.com/download.html

For more information check here

I had to go back to the older version. The new version does not support discriminator tap.

 

[dave3825]

I don't think cables were need if monitoring straight from UT1 (I could be wrong though, been a number of years since I used V1).

All I know is the decoding of phase 1 ( in UT 2 ) without needing vb or vac cables came in Version 2, Release 0, Preview 55. Can't even remember the last time I used UT version 1.

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