Thanks, Greg. I should have said that the bear claw is what I am seeing on my panadapter from the satellite, not from FLDIGI

Mark Lunday, WD4ELG Greensboro, NC FM06be wd4elg@arrl.net http://wd4elg.blogspot.com SKCC #16439 FISTS #17972

-----Original Message----- From: Greg D [mailto:ko6th.greg@gmail.com] Sent: Wednesday, March 01, 2017 3:16 PM To: Mark Lunday; amsat-bb@amsat.org Subject: Re: [amsat-bb] Still trying to decode NO-84

Sounds like there's no audio, or the volume somewhere in the audio chain is turned all the way down. Or the audio cable is broken (especially a missing ground or ground loop). That's the sort of display I see with fldigi when I disconnect the audio cable from the PC. Think "digital hum."

Greg KO6TH

Mark Lunday wrote:

The signal looks like a bear claw, 6 parallel signals in the passband. What causes that?

Mark Lunday, WD4ELG Greensboro, NC FM06be wd4elg@arrl.net http://wd4elg.blogspot.com SKCC #16439 FISTS #17972

---

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Mark,

Is your receiver set to FM mode for the downlink?

73,

Paul, N8HM

On Wed, Mar 1, 2017 at 9:35 PM, Mark Lunday wd4elg@outlook.com wrote:

0230 UTC pass, saw the bear claw PSK 31 waveform again. Anyone else able to see the PSK dowllink? I am seeing 7 parallel traces, almost like the transmission is overloading the receiver.

Attempting to attach the file to this email with a capture of what my SDR receiver is seeing...

On a positive note, APRS is working perfectly on NO84 even at low passes.

Mark Lunday, WD4ELG Greensboro, NC FM06be wd4elg@arrl.net http://wd4elg.blogspot.com SKCC #16439 FISTS #17972 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

I am trying too to activate NO-84, 50w on 28.120 MHz with vertical antenna or dipole with FLDIGI (saw no difference, still weak), good downlink signal on UHF with SDR-14+SpectraVue as panadapter at 10.7 MHz, beacon decoded in FLDIGI,   my weak signal  sometime decoded, strong doppler on my signal despite I correct both with orbitron/wispdde using only fresh keps and GPS computer sync clock. Any idea?73 Fer IW1DTU here some screenshoot link to dropbox https://www.dropbox.com/s/ec2i14l62u4ij3w/NO-84%202%20mar17%20uno.jpg?dl=0

https://www.dropbox.com/s/l1k3a3h8atyys5l/NO-84%202mar17%20due.jpg?dl=0

On Thursday, March 2, 2017 2:51 AM, Mark Lunday wd4elg@outlook.com wrote:

0230 UTC pass, saw the bear claw PSK 31 waveform again.  Anyone else able to see the PSK dowllink?  I am seeing 7 parallel traces, almost like the transmission is overloading the receiver.

Attempting to attach the file to this email with a capture of what my SDR receiver is seeing...

On a positive note, APRS is working perfectly on NO84 even at low passes.

Mark Lunday, WD4ELG Greensboro, NC  FM06be wd4elg@arrl.net http://wd4elg.blogspot.com SKCC #16439  FISTS #17972 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

I just caught the word “beacon” and a partial call on the 0330 pass.

I think I saw my downlink when I was transmitting…there was about a 2-3 second delay after I started to transmit, but when I stopped transmit the downlink signal ended almost immediately. This happened twice, so I think I was getting through the bird.

OK, I will try something different next time. I will decode/receive using my IC-910H instead of the SDRPlay RSP1 receiver.

Mark Lunday, WD4ELG Greensboro, NC FM06be wd4elg@arrl.net http://wd4elg.blogspot.com SKCC #16439 FISTS #17972