Re: [amsat-bb] AO-85 telemetry hints
Hello Steve,
The only hardware/SDR supported natively by Foxtelem 1.0 is FCDP or FCDPplus.
For other SDRs, you have to use something like SDR#, HDSDR, SDR-Radio V2, to decode the audio (FM,about 12-15kHz wide,audio filtering OFF); ouput that audio to a virtual audio cable, then set up Foxtelem to use that virtual audio cable as input. It works, both live and with recordings, both slow and high speed.
I will copy AMSAT-BB since others will ask, too :)
73,
On Fri, Oct 9, 2015 at 10:08 AM, Greene, Stephan A < stephan.a.greene@vencore.com> wrote:
Mark:
Have you tried other SDR than the FCD Pro? I know the Fox telemetry software detects the FCD (it appears in the source pull down menu), I haven't figured out how to get it to similarly "see" my SDRPlay. With the FCD Pro, did you set the telemetry software to use IQ input or audio (your post suggests audio), fast or slow settings?
Any tricks to using the telemetry software with other SDR software? (I've been trying HDSDR so far, I have an older copy of SDR# that should still work with my SDRPlay, and SDR-Console works with it, too) Or do you create an IQ recording and just play it back?
73 & Thanks!
Steve KS1G
-----Original Message----- From: Mark L. Hammond [mailto:marklhammond@gmail.com] Sent: Friday, October 09, 2015 6:34 AM To: amsat-bb@amsat.org Subject: [amsat-bb] AO-85 telemetry hints
Hi All,
On the 10utc pass this morning, while the transponder was on and in use:
I learned that reducing the width of the cutoff filter in Foxtelem program made it so I could copy the subaudible telemetry packets with the Funcube Dongle Pro. Reducing from the default 200 Hz to about 180 or 175 seemed to work here. It shows up as a decent eye pattern after that.
Another FYI-When playing back an IQ recording via SDR#, it seems a bit more forgiving, working well around 175-200.
Suggest folks experiment for best copy! Share hints here, please!
73,
Mark L. Hammond [N8MH]
I will pile on to Mark's reponse in case you want to use the other "IQ" features of FoxTelem, such as capturing the RF Signal To Noise or the TCA. If you use a program like HDSDR, then you can also feed the IQ audio to FoxTelem rather than the decoded audio.
Chris
On Fri, Oct 9, 2015 at 10:31 AM, Mark L. Hammond marklhammond@gmail.com wrote:
Hello Steve,
The only hardware/SDR supported natively by Foxtelem 1.0 is FCDP or FCDPplus.
For other SDRs, you have to use something like SDR#, HDSDR, SDR-Radio V2, to decode the audio (FM,about 12-15kHz wide,audio filtering OFF); ouput that audio to a virtual audio cable, then set up Foxtelem to use that virtual audio cable as input. It works, both live and with recordings, both slow and high speed.
I will copy AMSAT-BB since others will ask, too :)
73,
On Fri, Oct 9, 2015 at 10:08 AM, Greene, Stephan A < stephan.a.greene@vencore.com> wrote:
Mark:
Have you tried other SDR than the FCD Pro? I know the Fox telemetry software detects the FCD (it appears in the source pull down menu), I haven't figured out how to get it to similarly "see" my SDRPlay. With the FCD Pro, did you set the telemetry software to use IQ input or audio (your post suggests audio), fast or slow settings?
Any tricks to using the telemetry software with other SDR software? (I've been trying HDSDR so far, I have an older copy of SDR# that should still work with my SDRPlay, and SDR-Console works with it, too) Or do you create an IQ recording and just play it back?
73 & Thanks!
Steve KS1G
-----Original Message----- From: Mark L. Hammond [mailto:marklhammond@gmail.com] Sent: Friday, October 09, 2015 6:34 AM To: amsat-bb@amsat.org Subject: [amsat-bb] AO-85 telemetry hints
Hi All,
On the 10utc pass this morning, while the transponder was on and in use:
I learned that reducing the width of the cutoff filter in Foxtelem program made it so I could copy the subaudible telemetry packets with the Funcube Dongle Pro. Reducing from the default 200 Hz to about 180 or 175 seemed to work here. It shows up as a decent eye pattern after that.
Another FYI-When playing back an IQ recording via SDR#, it seems a bit more forgiving, working well around 175-200.
Suggest folks experiment for best copy! Share hints here, please!
73,
Mark L. Hammond [N8MH]
-- Mark L. Hammond [N8MH] _______________________________________________ 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
Hi!
Since the FUNcube Dongle Pro+ appears as a sound device to Windows, you can have two programs connect to it at the same time - provided they use the same LO/center frequency and input bandwidth settings.
Chris confirmed via e-mail last night that the FoxTelem software uses 192 kHz bandwidth from the FUNcube dongle. With this information, I set HDSDR's LO frequency to be 145.960 MHz (a little below the 145.980 MHz downlink frequency), and used this frequency as the center frequency in FoxTelem. I set the Input Bandwidth in HDSDR to be 192000, to match what FoxTelem expects to see. I found that I had to start HDSDR first, and then start FoxTelem, so both programs could access the dongle. Then I didn't have to use a virtual audio cable (or, for some Windows 7 and older PCs, the Stereo Mix audio device that does the same thing) to pipe audio from HDSDR to FoxTelem. Each program can then do what you want - in my case, HDSDR wrote an RF recording, while FoxTelem decoded telemetry. You can also mute the audio from either program, so you aren't listening to the same audio from both programs (HDSDR has a Mute button on the screen, and FoxTelem has a Silence Speaker button).
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK
If you use a program like HDSDR, then you can also feed the IQ audio to
FoxTelem rather than the decoded audio.
participants (3)
-
Chris Thompson -
Mark L. Hammond -
Patrick STODDARD (WD9EWK/VA7EWK)