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Airspy, SDR Sharp & PDW

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Airspy, SDR Sharp & PDW

Postby Blitz » Sat Jan 20, 2018 5:45 pm

Hey guys, I have been playing around with an Airspy Mini, SDR Sharp and PDW but i'm not having much luck. - I am a noob to this kind of stuff, so it may be due to a lack of understanding.

I have searched the forum but still need a little guidance.

Setup:

Windows 10 Laptop
SDR Sharp
PDW v3.2b01
VB Audi Cable
Airspy Mini.

https://imgur.com/a/Sui3G

This is currently what i seem to be getting:

Code: Select all
1993092 16:47:21 20-01-18 POCSAG-1 NUMERIC 1200  U617U[9907
1219462 16:47:21 20-01-18 POCSAG-2 NUMERIC 1200  00635
1254511 16:47:23 20-01-18 POCSAG-3 NUMERIC 1200  TONE ONLY

0595287 16:47:23 20-01-18 POCSAG-3  ALPHA  1200  FEtd2h3?J,R2?B??Q$?5

1092371 16:47:23 20-01-18 POCSAG-3 NUMERIC 1200  TONE ONLY
1680980 16:47:23 20-01-18 POCSAG-3 NUMERIC 1200  TONE ONLY
0634244 16:47:23 20-01-18 POCSAG-2 NUMERIC 1200  TONE ONLY
0703805 16:47:23 20-01-18 POCSAG-1 NUMERIC 1200  TONE ONLY
0351477 16:47:23 20-01-18 POCSAG-3 NUMERIC 1200  66563
0840838 16:47:27 20-01-18 POCSAG-3 NUMERIC  512  5393*95653-673-5U93U07-9]
1398225 16:47:27 20-01-18 POCSAG-3 NUMERIC  512  TONE ONLY
0086762 16:47:27 20-01-18 POCSAG-2 NUMERIC  512  57-45
1799331 16:47:27 20-01-18 POCSAG-3 NUMERIC  512  TONE ONLY
0742739 16:47:28 20-01-18 POCSAG-3 NUMERIC  512  **55*8***259**4-*255**59U5U8**
1419951 16:47:28 20-01-18 POCSAG-2 NUMERIC  512  TONE ONLY
0908631 16:48:21 20-01-18 POCSAG-2 NUMERIC 1200  5]94*46977
0724769 16:48:21 20-01-18 POCSAG-3 NUMERIC 1200  TONE ONLY
1764713 16:48:21 20-01-18 POCSAG-3 NUMERIC 1200  TONE ONLY
1868898 16:48:21 20-01-18 POCSAG-2 NUMERIC 1200  U-2[]


These are the settings i have in SDR Sharp:
https://imgur.com/UPYUDmd

https://imgur.com/a/RPrCV
I am trying to decode the messages from the QAS/QFRS on 148.6375 & 148.5625

If anyone could provide me with some assistance or point me in the right direction.

Thanks
Blitz
Newly Registered Users
 
Posts: 1
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Re: Airspy, SDR Sharp & PDW

Postby Boort8720 » Sat Jan 20, 2018 8:16 pm

Hi Blitz,

Looks to me as if your decoding rate is down a bit. This can be caused by a number of things such as a weak signal, a directional antenna facing the wrong way or even a slow computer I have found. There are also numerous settings in SDR# that require a lot of tweaking to get the perfect signal. I have my gain up at around 50dB and my RF gain at about 48dB, but this could be different depending on the area you are in. I also have a few issues with frequency 'drift', due to my cheap dongles with poor oscillator circuits. This can be corrected using the 'Frequency correct' or ppm (something along those lines), which is found in the settings cog in the top left, along with the sample rate and RF correction controls. There are way more people on this site that will be of much more help to you, but this is just my understanding and what I have found over the years. Hope you get it going soon!

Regards,
Mitch Baker

Uniden UBCD396XT, BCT15X, UBCD996T, Baofeng BF-888S, Tait TM9100, Simoco SRM9000, Yaesu FT70DR
Boort8720
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Re: Airspy, SDR Sharp & PDW

Postby slothking » Sun Jan 21, 2018 8:35 am

Where I am there is a heap of tone only messages. There is a setting in pdw to reject those - I found that tick box to be very helpful.
Your not getting gibberish so your probably very close to getting it right.


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slothking
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