DSDPlus

[n9mxq]

P25.. don't have enough signal on the local DMR to get decent decode with either..

Tried again on the local DMR.. And have to say I'm impressed..

Decodes even with very little signal.. Kinda choppy, but still impressed..

 

[mtindor]

Tried again on the local DMR.. And have to say I'm impressed..

Decodes even with very little signal.. Kinda choppy, but still impressed..

You might actually be able to get improved decode on DMR if it's a weak signal, by using the advanced tuning methods of DSPlus. You can use dsdtune to simplify that. I think dsdtune is discussed further up in this thread.

You can try throwing some parameters at DSDPlus and see what it does for you.

dsdplus -fr (basic DMR decoding)
dsdplus -fr -dr5 -dh1 -ds61 -dd45 -dv22 # this may or may not improve your decode

Mike

 

[alpha-alligator]

Provoice help

Hi all, Its great that I recorded the raw sample in dsd, and, might I add easy too. Just hit the R and away we go!

What I found out is the beeping sound with Edacs system is being overlapped on the PV transmissions.
Is there a way for DSD to ignore these annoying beeps?

samples
Zippyshare.com - DSDPlus-Raw-Input_Best Sample.lost right in the middle.wav the first one is the best.
Zippyshare.com - DSDPlus-Raw-Input_Total transmission lost.wav
Zippyshare.com - DSDPlus-Raw-Input_last part missing.wav

http://forums.radioreference.com/un...-bad-edacs-beeps-prevent-proper-tracking.html
..............But Unitrunker works with regard to tracking but My problem is the beeps are posted over the transmission.

I should mention My setup consists of two usb dongles+Unitruker+dsdplus

 

[n9mxq]

You might actually be able to get improved decode on DMR if it's a weak signal, by using the advanced tuning methods of DSPlus. You can use dsdtune to simplify that. I think dsdtune is discussed further up in this thread.

You can try throwing some parameters at DSDPlus and see what it does for you.

dsdplus -fr (basic DMR decoding)
dsdplus -fr -dr5 -dh1 -ds61 -dd45 -dv22 # this may or may not improve your decode

Mike

I'm not that interested in listening to the local Chrysler plant.. :lol:

It's more of a "hey, it works!" kinda thing.. In case there are any DMR's that pop up that could be interesting..

 

[mtindor]

I'm not that interested in listening to the local Chrysler plant.. :lol:

It's more of a "hey, it works!" kinda thing.. In case there are any DMR's that pop up that could be interesting..

Your input [as to whether those specific custom values improved decode] would have been helpful to know.

Mike

 

[Jay911]

For what it's worth, I'm monitoring an 800 MHz system from about 5 miles away, inside a metal building, with the stock antenna included with my SDR stick. (SDR#>VAC>DSD/DMRDecode) The signal is far from perfect. DSDtune gave me this:

-dr4 -dh6 -ds59 -dd9 -dv18

Hasn't seemed to make a huge difference in my decodes.

 

[mtindor]

For what it's worth, I'm monitoring an 800 MHz system from about 5 miles away, inside a metal building, with the stock antenna included with my SDR stick. (SDR#>VAC>DSD/DMRDecode) The signal is far from perfect. DSDtune gave me this:

-dr4 -dh6 -ds59 -dd9 -dv18

Hasn't seemed to make a huge difference in my decodes.

I'm just trying to figure out if there are some good "default values" for the DMR filter that would apply across the board to people monitoring weak signal DMR.

Given the possible permutations, it doesn't surprise me that yours differs from mine. In my case though, I have known proven values that increased decode frame percentage 40+ percent on a weak signal TRBO. I just figured maybe some others could try out those values on weak signal TRBO in their locations. If it doesn't provide a lower score than default values, then that is good. If it provides a higher score than default values, even better.

As some folks of mentioned, the default filter values appear to not be optimal for DMR. If somebody can get a good raw audio sample that can be improved upon 40+% by using the advanced tuning, then I'd think that would probably be a "good start" for default tuning values for DMR. But we'd only know that if other people tested those specific values on weak signal DMR and it improved their decoded frame percentage [or whatever the 'decoding score' is supposed to represent].

Assuming you saved the raw audio for the weak signal TRBO you were monitoring [and it sounds like you did], is there any chance you could test that raw audio against (a) default values, (b) my values posted and (c) your values posted and then give us a summary of each the end decoding score produced with each?

Mike

 

[n4yek]

I must say I can't begin to tell the author of DSD Plus how happy I am. (tear rolls down cheek)
I can now hear neighboring counties Nexedge trunk system. The DSD1.6, while has been good for me, doesn't even begin to even try to decode the system when I have both DSD1.6 and DSD Plus running side by side to make comparisons.
Thanks for the GREAT program!!!

 

[br0adband]

... with the stock antenna included with my SDR stick. ...

Well there ya go.

 

[Jay911]

Well there ya go.

Yeah, and as I said, I'm in a metal structure and my ground plane is a whiteboard easel so it's not exactly a good setup.

I plan to try to take it out on the road in my truck later on, and then I can have the antenna on the roof (and get closer to the transmitter site).

I have a little pigtail cable at home that will take the MCX connection of the SDR stick and convert it to BNC for my antenna multicoupler, but home is far, far too far away from any of these DMR sites to get a reasonable decode.

 

[RonnieUSA]

Does DSD Plus show P25 unit numbers?

 

[mtindor]

Does DSD Plus show P25 unit numbers?

I'm pretty sure it does. I'm not monitoring P25 right now to tell you. In order for it to do it, you probably have to pass it a -v3 or -v4 switch to make it more verbose. Don't be surprised if it scrolls by so quickly that you can't get a good glimpse at it

Mike

 

[n9mxq]

Your input [as to whether those specific custom values improved decode] would have been helpful to know.

Mike

I plan on trying them.. If it helps others I'm all for it.. But for now, vacation is over and I'm off to work...

-15 with -25 wind chills.. Heck of a welcome back..hehe

 

[mancow]

So far I'm super impressed. Using the PSR800 set at around DISC volume 10 I'm getting solid 100% P25 decodes even on weak signals. I'm trying to catch some other protocols to test such as TRBO yet.

If this could be placed on a small single board computer it would be awesome.

 

[RonnieUSA]

Don't be surprised if it scrolls by so quickly that you can't get a good glimpse at it

Mike

I noticed that, it moves very fast.

 

[br0adband]

Does DSD Plus show P25 unit numbers?

It will show something like this with a P25 system decode if you use at least -v3 for verbose amount:

[E] Channel Group & User: tg=1231 src=10238

I verified the source there as a RUID on our S.N.A.C.C. system here in the Las Vegas area, but there's no TGID 1231 that I can track down so I'm a bit stumped as to what that's supposed to represent. But then again I'm not very experienced with P25 traffic to begin with, and the P25 extensions they're putting into place on this system right now are a stopgap move till they roll out the P25 Phase II functionality here sometime this new year, the TGID 1231 could just be something I'm not aware of at this moment but it seems like an odd thing for the TGID I suppose (not an even number, etc) - of course I could just be interpreting the data wrong to begin with, go figure.

If you use -v4 you get the same info but additional info related to specific errors, LSD/LSU info and so on.

 

[mtindor]

It will show something like this with a P25 system decode if you use at least -v3 for verbose amount:

[E] Channel Group & User: tg=1231 src=10238

I verified the source there as a RUID on our S.N.A.C.C. system here in the Las Vegas area, but there's no TGID 1231 that I can track down so I'm a bit stumped as to what that's supposed to represent. But then again I'm not very experienced with P25 traffic to begin with, and the P25 extensions they're putting into place on this system right now are a stopgap move till they roll out the P25 Phase II functionality here sometime this new year.

If you use -v4 you get the same info but additional info related to specific errors, LSD/LSU info and so on.

TG 1231 x 16 = 19696 <-- what you're really looking for TG 19696 isn't listed in SNACC, but 19696 is the actual talkgroup that most scanners / listeners on here would make sense of.

Mike

 

[br0adband]

TG 1231 x 16 = 19696 <-- what you're really looking for TG 19696 isn't listed in SNACC, but 19696 is the actual talkgroup that most scanners / listeners on here would make sense of.

Mike

OIC, I had no idea... go figure, and very nice to know. Guess I'll have to start doing mental math on those things.

And yep, that's a newer TG here on the S.N.A.C.C. system used by the Community College of Southern Nevada side of things, it's basically all I can get for P25 activity and it's very few and far between when they do have some comms. CCSN appears to be the only user of the P25 S.N.A.C.C subsystem so... pretty sure that one is used for campus security on one of the branches here. I have activity on that one logged with Unitrunker, not a lot but it's in the records now along with a few others.

Is that how all Motorola Type II systems work or is that something based primarily in the P25 protocol, by using a multiplier of the given talkgroup ID ? All I've ever known about is the typical TGIDs, I didn't know you're supposed to extrapolate it out with a 16x multiplier to garner the actual TGID most of us are more familiar with.

I wonder if DSD+ could be modified so it does the internal math to display the most commonly used format (5 digits in most systems, 4 in some others)...

 

[mrpurrfect69]

Dsd+

Just curious to ask if anyone can provide a link for the DSD+ software???

Tnx in advance

 

[RonnieUSA]

I'm having a problem with the P25 transmissions, it sounded great when I first started the program, and about an hour later it sounds horrible.
This is on a laptop, so I have to use the mic input.