RE: Re[8]: [multipsk] Multipsk 4.26 test version 2 - new VDL2 mode (aircrafts transmissions) decoding


Dec 27, 2013

 


----------------------------

#17383 Dec 27, 2013

Hi Patrick, I will appreciate you checking out the problem I am having. This does not happen with ACARS, I can run same RX with MultiPSK all day with no problems at all. I don't know about Pocsag, I don't know freqs here, or even if it is used here near Sydney). I will test if there is a problem running the RX/Program but with no antenna and see if that crashes things. Regards, Mike SimpsonPenrith, NSW, Australiawww.rstools.info



----------------------------

#17387 Dec 27, 2013

Hi Patrick, As you requested, I ran MultiPSK and my USB receiver with the antenna disconnected for 4 hours and did not have any problems at all. Once I reconnected the antenna, MultiPSK crashed as before within 30 minutes.  Regards, Mike SimpsonPenrith, NSW, Australiawww.rstools.info



----------------------------

#17389 Dec 28, 2013

Hello Mike,  >. I don't know about Pocsag, I don't know freqs here, or even if it is used here near Sydney).It was for information, not in relation with the crash.  >I will test if there is a problem running the RX/Program but with no antenna and see if that crashes >things.Yes please, all things equal except no antenna connected.  73Patrick      De : multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] De la part de Mike SimpsonEnvoy. : samedi 28 d.cembre 2013 00:47. : multipsk@yahoogroups.comObjet : Re[8]: [multipsk] Multipsk 4.26 test version 2 - new VDL2 mode (aircrafts transmissions) decoding



----------------------------

#17390 Dec 28, 2013

Thanks Mike. Could you repeat the experience but now with antenna connected but outside the VDL2 band (so to just introduce noise).  73Patrick  De : multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] De la part de Mike SimpsonEnvoy. : samedi 28 d.cembre 2013 02:55. : multipsk@yahoogroups.comObjet : Re[8]: [multipsk] Multipsk 4.26 test version 2 - new VDL2 mode (aircrafts transmissions) decoding



----------------------------

#17391 Dec 28, 2013

Hi Patrick,

Thanks for this new VDL2 option.I have the same problem as Mike Simpson. Setup is a RTL SDR dongle, Windows 8.1,tested on several computers. Program crashes after 1-30 minutes. Lots of decodes. However when I untick I/UI (just XID and I..>Q ticked in my setup) the program looks stable and it stops crashing sofar... D:3080/1875 with 145 pos. in 15 minutes

Regards, Frank



----------------------------

#17394 Dec 28, 2013

Hello frank



I have it working with fcdpp ... but had no luck with the rtl (yet ... still

testing) ... could you send me some details how you got it working with the

rtl dongle???



Dg9bfc



sigi

> -----Urspr.ngliche Nachricht-----

> Von: multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] Im Auftrag

> von gftwint@...

> Gesendet: Samstag, 28. Dezember 2013 10:19

> An: multipsk@yahoogroups.com

> Betreff: RE: Re[8]: [multipsk] Multipsk 4.26 test version 2 - new VDL2

> mode (aircrafts transmissions) decoding

>

>

>

> Hi Patrick,

>

> Thanks for this new VDL2 option.I have the same problem as Mike Simpson.

> Setup is a RTL SDR dongle, Windows 8.1,tested on several computers.

> Program crashes after 1-30 minutes. Lots of decodes.

> However when I untick I/UI (just XID and I..>Q ticked in my setup) the

> program looks stable and it stops crashing sofar... D:3080/1875 with 145

> pos. in 15 minutes

>

> Regards, Frank

>

>



----------------------------

#17396 Dec 28, 2013

Hi Sigi,Setup is RTL SDR  dongle.USB 2 (I have tried USB3, same result) Windows 8.1 , Version test2 MPSK. Freq. is set to 136.965,450 (This gave the best result for my dongle anyway). I..>Q and XID box ticked. When I 'untick' the I..Q> box no decodes at all....When I tick I/UI the program crashes within minutes.. When I tick the 'RX Corrections' box the number of decodes improves a lot (I have not changed the Amplitude or Phase level, it remains at 0) QTH is about 35 km from EHAM

Regards, Frank



----------------------------

#17399 Dec 28, 2013

Hello Frank (and the group)



Finally got it working :-)



The mistake was on several things



I had to swap iq (in the iq direct interface window and not in the rx/tx

window!!) ... so the 136975 kc transmission is 10 kc ABOVE the 136965 kc

frequency centre ....



I had to set the ppm correction in the transceiver window WITH A MINUS

SIGN!!! ... and had to find out the correction value (that the vdl2

transmissions were right on spot) ...(in my case -66 to -67ppm)



Now when I just start multipsk (and as last mode vdl2 was used) ... it

starts decoding RIGHT AFTER STARTUP!!! ...



:-)



Greetz



Sigi



Dg9bfc



Ps ... -66 ppm is a bit to low and -67ppm is a bit high so I do the fine

tuning with the af frequency setting





> -----Urspr.ngliche Nachricht-----

> Von: multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] Im Auftrag

> von gftwint@...

> Gesendet: Samstag, 28. Dezember 2013 10:56

> An: multipsk@yahoogroups.com

> Betreff: RE: AW: Re[8]: [multipsk] Multipsk 4.26 test version 2 - new VDL2

> mode (aircrafts transmissions) decoding

>

>

>

> Hi Sigi,

> Setup is RTL SDR dongle.USB 2 (I have tried USB3, same result) Windows

> 8.1 , Version test2 MPSK. Freq. is set to 136.965,450 (This gave the best

> result for my dongle anyway). I..>Q and XID box ticked. When I 'untick'

> the I..Q> box no decodes at all....When I tick I/UI the program crashes

> within minutes.. When I tick the 'RX Corrections' box the number of

> decodes improves a lot (I have not changed the Amplitude or Phase level,

> it remains at 0) QTH is about 35 km from EHAM

>

> Regards, Frank

>

>







----------------------------

#17401 Dec 28, 2013

Hello Frank and Mike,  Thanks Frank for the information, so it seems to be related to the I frames.  If you could, both, confirm that with RR and XID frames only (I/UI button extracted), there are never crashes. It would simplify the bug search.  73Patrick  De : multipsk@yahoogroups.com [mailto:multipsk@yahoogroups.com] De la part de gftwint@...Envoy. : samedi 28 d.cembre 2013 11:19. : multipsk@yahoogroups.comObjet : RE: Re[8]: [multipsk] Multipsk 4.26 test version 2 - new VDL2 mode (aircrafts transmissions) decoding



----------------------------

#17407 Dec 28, 2013

Sorry if this is a daft question...When you refer to your USB receiver, do you mean Upper Sideband or Universal Serial Bus.

Martin



----------------------------

#17416 Dec 29, 2013

Hi Patrick,

I (too) can confirm this.No more crashes when the I/UI button has been turned off.

Regards,Frank


S
e
n
i
o
r
T
u
b
e
.
o
r
g