Expanding the band limits on the panadaptor display
Dave Horsfall
Is there a way to expand the band limits to show e.g. 144-148MHz, or 88-108MHz? The best I can do it +/- 0;5MHz. The dongle is a Realtek RTL2838, if that makes a difference.
Thanks.
Dave VK2KFU
Simon Kennedy
--
You received this message because you are subscribed to the Google Groups "Gqrx SDR" group.
To unsubscribe from this group and stop receiving emails from it, send an email to gqrx+unsubscribe@googlegroups.com.
To post to this group, send email to gq...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/gqrx/a97c3143-8a40-467e-b870-b6109af09ce5%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Alexander Fasching
less than 3.2 MS/s. This will be the maximum bandwidth that you can display.
You can set the sample rate in the I/O Devices dialog. Not all receivers
work reliable with all sample rates, so you might have to try different
settings.
http://gqrx.dk/doc/practical-tricks-and-tips
Gqrx 2.3.1 is several years old, so I'd suggest you update the the
latest version first.
I'm not familiar if the Ubuntu packages work on Debian, so someone else
would have to comment on that. In the meantime, you can build it from
source, as described here:
https://github.com/csete/gqrx
> You received this message because you are subscribed to the Google
> Groups "Gqrx SDR" group.
> To unsubscribe from this group and stop receiving emails from it, send
> <mailto:gqrx+uns...@googlegroups.com>.
> https://groups.google.com/d/msgid/gqrx/a97c3143-8a40-467e-b870-b6109af09ce5%40googlegroups.com
Robin Gape
Dave,
the fundamental limit on the bandwidth that GQRX can display is
set by the sample rate of the RF hardware. As others have pointed
out, an RTL2838 has an absolute maximum sample rate of 3.2MHz, for
a received bandwidth of ±1.6MHz from the centre, for a maximum
bandwidth of 3.2MHz. Dongles such as the Funcube Dongle Pro have a
much lower limit of 192kHz. Other hardware will allow a wider
bandwidth, generally costing more! [Technical reasons will
generally limit the useful bandwidth to 80%-90% of the Nyquist
limit, which is the limit quoted above.]
There's a much longer version of this reply. Not knowing where you start this conversation from, I'd recommend your favourite search engine, looking for SDR (software defined radio) and DSP (digital signal processing). The wikipedia article on SDR doesn't explain how SDR works, but might be a good place to start.
HTH,
Robin, G8DQX