EDACS Provoice trunking with a conventional radio

[Babuino]

Hi all! Our local EDACS system uses ESK so its not possible to put the radio on its control channels even in rx only mode,
is it possible to listen Provoice traffic in EDACS system by programming EDACS traffic channels as a conventional Provoice channels and scanning them all, like motorolas may do with astro9600 trunking?

[Radioman96p71]

Not sure if that would work or not. I Have tried it with AEGIS and it did not work. Wouldn't sync up correctly it seems. Would get little pops and clicks on the audio sometimes. Usually it would just allow the raw audio thru, i.e. you could hear the analog channel data sound like it wasnt recognizing the 'noise' as AEGIS data. Whether or not it would work for ProVoice i have no idea. I'll give it a shot tonight see if i can catch some.

KCØGIK

[mitaux8030]

The solution is simple - in the digital voice options, select data polarity 'inverted'. Seems the digital voice data goes through a 180 degree phase reversal when transmitted by the base station.

[Radioman96p71]

Wow, all this time and I never noticed that in ProGrammer! Learn something new every day, I'll give that a shot. FYI, without setting the invert in ProGrammer as mitaux8030 suggested, ProVoice behaves the same as AEGIS, no decoded audio. I'll flip it to inverted and see what that does!

KCØGIK

[EnidPuceflange]

Originally Posted by mitaux8030

The solution is simple - in the digital voice options, select data polarity 'inverted'. Seems the digital voice data goes through a 180 degree phase reversal when transmitted by the base station.

Yes - you also have to set the outside address to 51 (decimal) rather than the 85 that it has by default.

[Radioman96p71]

All good information, thanks a bunch guys! Have to add that to the pile of knowledge i may need someday!!

KCØGIK

[ElroyJetson]

I'm making a note of this, myself.

I use essentially the same trick to monitor a Motorola Astro digital system with conventional (digital) scan with an Astro Saber. It works very well. And the system is not very busy so I usually catch both sides
of any given conversation, as well as if it were actually following the trunking system in trunking mode.

Now for my next trick, I guess eventually I'll have to see if I can use a M/A-Com radio to monitor a
Motorola digital trunked system in the same manner, or use a Motorola radio with a M/A-Com system in the same way. (But obviously, in P25 mode, not ProVoice.)


Elroy

[blantonl]

Set the RX Address to 172, and as previously indicated ProVoice on EDACS Trunking is inverted.

[Michael-SATX]

Lindsay, what make/model of radio are you refering to ? Does this thread relate to our Pro-Voice TRS?

OK, back to my Pro-106 which simply does the "ESK" ignore trick like your PSR-500 scanner does
Botom line, other than us here in San Antonio, having the 19 LCN's of the Blue Simulcast layer in one scanlist and the 19 LCN's of the Gold Simulcast layer in another scanlist and get to properly trunk track
just the Analog Talk Groups .... is this thread implying I can do more with a "conventional" scanner ?
Or do I need to bestow on myself another radio to decode Pro-Voice like an LPE-200 or other radio ?

So what in your estimation, what does it take to trunk track EDCAS Pro-Voice talk groups in SATX ?

Bring It )

[Thunderknight]

Originally Posted by ElroyJetson

Now for my next trick, I guess eventually I'll have to see if I can use a M/A-Com radio to monitor a
Motorola digital trunked system in the same manner, or use a Motorola radio with a M/A-Com system in the same way. (But obviously, in P25 mode, not ProVoice.)

Several radio vendors tested their P25 radios on a Motorola statewide P25 system for cross compatibility...I can't recall the State, but it was in the midwest...Illionis maybe?

Edit: Found a reference in Channels to such testing in Arizona. (Page 18)
http://www.macom-wireless.com/Channe...ls_v6_iss1.pdf

[edmscan]

Understanding the above .. setting the RX and TX to 172 will allow you to listen to PV conventional transmissions. That is fine, but is there a way to listen to Radio to Radio PV transmissions ? If you scan the LCN's for a system for example you will always have the radio stop on the control channel, thus making the scan feature useless.

I understand that this is only capable on "supervisor" type radios. Can someone enlighten me on this capability.

[davidbond21]

Originally Posted by edmscan

Understanding the above .. setting the RX and TX to 172 will allow you to listen to PV conventional transmissions. That is fine, but is there a way to listen to Radio to Radio PV transmissions ? If you scan the LCN's for a system for example you will always have the radio stop on the control channel, thus making the scan feature useless.

I understand that this is only capable on "supervisor" type radios. Can someone enlighten me on this capability.

The RX/TX Address should be thought of as being the ProVoice equivalent of a P25 NAC. Setting the RX Address to 172 tells the radio to unsquelch on any ProVoice transmission, not just those containing a matching value.

Yes, scanning the LCN's conventionally will eventually land you on the control channel, but all you have to do is remove that offending channel from the scan list, one or two key presses at most. Unless your radio is set to have a fixed scan list, in which case it will have to be reprogrammed to allow the scan list to be user editable.

[ElroyJetson]

"nuisance delete" is your friend in this case.


So is 172 the "listen to all ProVoice traffic" address?


Elroy

[davidbond21]

Originally Posted by ElroyJetson

So is 172 the "listen to all ProVoice traffic" address?

Elroy

I think that it is, and I believe that ProGrammer refers to this as the "All Call" value. That and since I've plugged this into my radio, it hasn't been quiet for more than about 15 seconds.

[pyteen]

I know all freq and lcn of my local edacs/provoice system. What i need to program radio i trunking mode?