Doppler correction too choppy on HRD?
I'm using the beta HRD (rev 4.1 build 2055) that offers the new Sat module. This was very handy in the ISS SSTV passes of late but I'm having some difficulties with FM and SSB birds with Doppler. I run a pair of Yaesu FT-857Ds and It corrects very quickly, several times per second, interrupting audio with each correction. This makes for near impossible copy on the downlink, often causing me to disable correction and follow manually. SATPC32 corrects less frequently and is easier to copy with, but I'd really like to get HRD working right with the integrated logging and all.
I've been unable to locate any settings to adjust the frequency of correction and I seem to recall the "old" Sat module could do this. Has anyone else encountered and resolved this challenge? I have posted on the HRD forum with no responses.
BTW, thanks to all for posting the manual process for following Doppler. Being new to SSB sats, this is very handy to have. I was wondering why I would hear a quick whistle noise as folks locked in!
Regards,
Mike WB1AAT
Mike,
For reasons unknown, those rigs mute the audio when changing frequency via CAT. I use another rig, but it has been reported that only the speaker and headphone outputs are muted, and that if you take the audio from the data/aux outputs there is no problem. Not specific and second hand, but you might want to look into that, as that is the real problem.
Alan WA4SCA
Hello Alan,
Thanks for the tip. I actually have a hookup for the 857 for digital modes and just managed to test that out on AO-51. I confirm that the phenomenon does not occur when listening to audio through the DATA jack.
So I have to listen through my computer. A little inconvenient buy way better than buying new gear :).
Thanks again.
Mike WB1AAT ----- Original Message ----- From: "Alan P. Biddle" [email protected] To: "'Mike Ryan'" [email protected]; [email protected] Sent: Wednesday, December 31, 2008 12:24 PM Subject: RE: [amsat-bb] Doppler correction too choppy on HRD?
Mike,
For reasons unknown, those rigs mute the audio when changing frequency via CAT. I use another rig, but it has been reported that only the speaker and headphone outputs are muted, and that if you take the audio from the data/aux outputs there is no problem. Not specific and second hand, but you might want to look into that, as that is the real problem.
Alan WA4SCA
Mike,
Glad to hear it works as advertized! Going through the computer works, and I suspect you could pick off some of the audio and go to an amplified speaker.
Happy New Year!
Alan WA4SCA
Sadly a restriction with these Yaesu radios :-(
If you manage to pick up a used FT-847 then do so!
Simon Brown, HB9DRV www.ham-radio-deluxe.com
----- Original Message ----- From: "Mike Ryan" [email protected]
I'm using the beta HRD (rev 4.1 build 2055) that offers the new Sat module. This was very handy in the ISS SSTV passes of late but I'm having some difficulties with FM and SSB birds with Doppler. I run a pair of Yaesu FT-857Ds and It corrects very quickly, several times per second, interrupting audio with each correction. This makes for near impossible copy on the downlink, often causing me to disable correction and follow manually. SATPC32 corrects less frequently and is easier to copy with, but I'd really like to get HRD working right with the integrated logging and all.
participants (3)
-
Alan P. Biddle -
Mike Ryan -
Simon (HB9DRV)