[amsat-bb] AO-85 9k6 data

skristof at etczone.com skristof at etczone.com
Fri Jul 1 14:24:48 UTC 2016


I use HD sdr with an rtl-sdr to get data from ao-85. I usually set the audio filter at about 500 hz since I'm just collecting data. Sounds like I'll need to open that up for any 9k6 data. Thanks for the  replies!Steve AI9IN


Sent from my Verizon Wireless 4G LTE smartphone-------- Original message --------From: Andrew Glasbrenner <glasbrenner at mindspring.com> Date: 7/1/2016  10:01 AM  (GMT-05:00) To: Scott <scott23192 at gmail.com> Cc: amsat-bb at amsat.org Subject: Re: [amsat-bb] AO-85 9k6 data 
Correct. I find 12-15 kHz works best on the AO-85 9k6 data with SDR#.

73, Drew KO4MA

> On Jul 1, 2016, at 9:58 AM, Scott <scott23192 at gmail.com> wrote:
> 
> Do I recall correctly that in order to receive the higher data rate, a wider RF and/or audio bandwidth might be required?
> 
> I often have the audio bandwidth narrowed a bit (high end only) to better hear the voice traffic, which of course has no effect on the DUV as long as the low end of the audio filter is left at zero.  Ditto on the RF bandwidth if it makes the voices easier to copy on a given pass.
> 
> -Scott,  K4KDR
> Montpelier, VA  USA
> 
> 
> --------------------------------------------------------------------------------
> 
> -----Original Message----- From: Alan
> Sent: Friday, July 01, 2016 9:49 AM
> To: skristof at etczone.com ; amsat-bb at amsat.org
> Subject: Re: [amsat-bb] AO-85 9k6 data
> 
> Steve,
> 
> 9k6 data is not used very much on AO-85 since it is not required for any of the experiments, and its
> use turns off the repeater.  It is turned on, rarely and briefly, for testing or other purposes.
> There is usually an announcement on Twitter, Facebook and/or here in advance, though not always if
> they are doing a quick look.  The Auto mode will pick it up, assuming everything else is working
> correctly at your station.  It has been reported that the signal threshold to copy 9k6 is somewhat
> higher than for DUV.
> 
> Expect to see much more when Fox-1Cliff and Fox-1D fly.
> 
> 73s,
> 
> Alan
> WA4SCA
> 
> 
> 
> 
> <-----Original Message-----
> <From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of skristof at etczone.com
> <Sent: Friday, July 01, 2016 6:11 AM
> <To: amsat-bb at amsat.org
> <Subject: [amsat-bb] AO-85 9k6 data
> <
> <I'm getting the hang of grabbing the AO-85 DUV data stream, but still
> <haven't caught any 9k6 data.
> <
> <Can I get a quick refresher on when the 9k6 data is transmitted, please?
> <I assume that FoxTelem set to "Auto" mode will pick it up when it
> <happens, but please correct me on that if I'm wrong there also.
> <
> <Pointing me towards on informational url would be fine, but personal
> <messages are lovely.
> <
> <Steve AI9IN 
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