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forum.funcube.org.uk • View topic - No capturing data.
Page 1 of 1

No capturing data.

PostPosted: Sun Dec 21, 2014 7:30 am
by vk2byf
Hi I'm new to this so I need some help please.

Ok I can find the satellite and I receive signal with Yaesu FT-817 S4 on home-brew Eggbeater antenna pair, UHF and VHF with preamp.

I seem to have +/- 10kHz of Doppler shift and have to follow the signal to keep audio in the receiver passband.
I am not using a dongle, Does autotune only work for Dongle?
I hear the signal, sounds like pink noise and I can hear and see the characteristic dual tones every 10 seconds or so on the tuning spectrum display.
Sounds exactly like recorded wave file samples on the web site.

It's 1200baud BPSK, right. Is the data in the noise or in the tone pair, which seems to short to carry much data?

Nothing shows on the status bar at the bottom, no sat ID no frame numbers, nothing.
Should Dashboard work with an ordinary SSB receiver? I use Dig mode or USB.

As far as I know I have it set up as per the FUNcube manual but I end up with a captured file with 0kb of data

I'm able to hear other Sats ok with this setup AO-07 SO-50, Fo-29

Much obliged for any help. Yes I have read the manuals dashboard and FUNcube

Regards Bob VK2BYF

Re: No capturing data.

PostPosted: Tue Dec 23, 2014 3:55 am
by AL0I

Re: No capturing data.

PostPosted: Fri Jan 16, 2015 4:51 am
by vk2byf
Hi Aloi

Thanks for taking the trouble to respond to my post.

I have successfully decoded and forwarded data to the warehouse as VK2BYF.

My entire problem was simply that I had my sound-card configured for the default 48k sampling rate.
Once I changed that to 96k, I could decode 100 frames on a single pass. I'm happy with that.
Now to make sense of the data. I need to know which axis is which on the bird.
It looks like the home-brew 146MHz eggbeater antenna is doing a great job almost horizon to horizon.
for 6 degrees and above. I can even see the typical eggbeater notches in the radiation pattern,
as the footprint moves over my QTH. Manually tuning to keep the signal in the passband of my receiver
is no problem. I don't loose frames as I move the dial slowly from about 145,9375 to 145,9310 over the pass.

Next I plan to use one of those cheapy USB dongles and automate the process.

I't all good fun and slows down dementia.

Thanks again Phil, Regards Bob VK2BYF