I've had good luck with MMSSTV using a Fun Cube Dongle, SDR-Radio and then Virtual Audio Cable to get the audio from SDR-Radio to MMSSTV (all on the same PC). Today I threw in a 4KHz filter from SDR_Radio and that seems to improve the S/N ratio. There was a lot of noise removed by that filter.
BTW, I picked up Farrell's license plate quite cleanly around 1800z although I did not get the start clearly enough to lock onto, so the picture has the top cut off.
I also noticed some idle in both the telemetry and the FM. A few times I seemed to be getting strong telemetry but got only Kursk frames, or 5 Kursk and 1 satellite. Another time, there was no FM audio for 10 or 15 seconds although there was a carrier. Oddly the telemetry continued, but the CW over on the edge of the telemetry band stopped. I'm not sure I get that, although looking at the code on the satellite might show something. At one point I certainly saw the little guy in low power mode, but the dropouts I mention above are not that. The transmitter was still on....
Burns, W2BFJ
Date: Fri, 30 Dec 2011 14:57:31 -0500 From: "Zachary Beougher" zack.kd8ksn@hotmail.com To: "kp hpjr" inservice2him@hotmail.com, amsat-bb@amsat.org Subject: [amsat-bb] Re: MMSSTV and ARRISat-1 Message-ID: SNT111-DS5C3FD0E1BCED394A4AFDBB3920@phx.gbl Content-Type: text/plain; charset="iso-8859-1"
I had a similar issue when I first started downloading SSTV, and if I recall correctly I believe it was because I had the input audio set way too high (I cranked it down to just about no audio to get a clear pic). If you have downloaded pictures before from HF and have had success at your preset audio levels, then I doubt that is the issue.
Zack KD8KSN
From: kp hpjr Sent: Friday, December 30, 2011 2:41 PM To: zack.kd8ksn@hotmail.com ; amsat-bb@amsat.org Subject: RE: [amsat-bb] Re: MMSSTV and ARRISat-1
Zack and others.
Yes, audio feed is direct as with all digi modes I operate.
Just had a pass of ARRISat-1 of 45 degrees plus over head. The downlink into my M2 5 element yagi @ 35 degrees elevation was S-9 plus 10db. A very good (great) signal.
2 times during the pass the SSTV was transmitted. During neither of them did the program initialize and copy anything. Partway through the 2nd transmission I forced it into RX Robot-36. All that occured was for it to stop after about 5 seconds. Again nothing decoded....frustrating to say the least. I'd like to get 1 photo...HI.
Using the exact same setting I have had several QSO's now on HF sending and receiving very clear photos.
Not sure what else to try.
N0KK, Kirk
From: zack.kd8ksn@hotmail.com To: inservice2him@hotmail.com; amsat-bb@amsat.org Date: Fri, 30 Dec 2011 07:48:57 -0500 Subject: [amsat-bb] Re: MMSSTV and ARRISat-1
Hi Kirk,
Like Greg said, ARRISat-1 is Robot 36. I also found that I received the clearest pictures when I ran the audio directly into the pc versus
letting
it pickup the audio from a speaker. I imagine you are probably already doing this.
73!
Zack KD8KSN
-----Original Message----- From: kp hpjr Sent: Wednesday, December 28, 2011 4:35 PM To: amsat-bb@amsat.org Subject: [amsat-bb] MMSSTV and ARRISat-1
GA, All the talk about SSTV from this bird got me thinking I'd like to try! I downloaded MMSSTV and installed. What are the best settings to use in the setup page for decent copy of photos from ARRISAT-1? I did copy pix on 14.230 after setup as a test run...but on last pass of ARRISAT, had wonderful copy of voice beacon but no pictures decoded. So wonder what I might be doing wrong. Any help appreciated. Kirk, N0KK
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End of AMSAT-BB Digest, Vol 6, Issue 699