This is mainly directed at BJay after our discussion at Robofaire on SDR.
My Question is what hardware should I look at if I want to play around with it?
One of our directors at work is concerned his office is bugged so I thought it a good opportunity to have a play around with SDR.
Stephen...
SDR Hardware??
SDR Hardware??
BLOG: https://my.makeraddiction.com/
Thingiverse: https://www.thingiverse.com/seaton/
Github: https://github.com/madeinoz67
Thingiverse: https://www.thingiverse.com/seaton/
Github: https://github.com/madeinoz67
Re: SDR Hardware??
Ended up purchasing a HackRF One from Qld so might have it in my hot little hands by early next week just in time for the Christmas break to start a playing!
BLOG: https://my.makeraddiction.com/
Thingiverse: https://www.thingiverse.com/seaton/
Github: https://github.com/madeinoz67
Thingiverse: https://www.thingiverse.com/seaton/
Github: https://github.com/madeinoz67
Re: SDR Hardware??
No mucking around with a dx.com $20 el-cheapo SDR. Straight into a real SDR: https://greatscottgadgets.com/hackrf/ 
Looking fwd to seeing how it works at the Feb. 2016 Meeting!
Looking fwd to seeing how it works at the Feb. 2016 Meeting!
Re: SDR Hardware??
Two things I have going on my dx.com $20 RF tuner:
1) I can control it via the command line, ie:
rtl_fm -f 94.1e6 -M wbfm -s 200000 -r 48000 - | aplay -r 48k -f S16_LE
2) I installed: https://github.com/ha7ilm/qtcsdr ; it's a simple GUI front end to something like the above CLI tool. Here is a screen shot:
I can type in a frequency, or just click on anything of interest on the waterfall graph and the it will change to that frequency. I am still using the ridiculously small 14cm antenna that came with it, but placed by my windows does pick up quite a few radio stations as you can see by the waterfall chart above.
Above, I am centred on 94.1 - JJJ. The other dark line off to the left is 93.3 - Classic FM.
Now, onto trying to figure out how to build a AM demodulator in GNU Radio
1) I can control it via the command line, ie:
rtl_fm -f 94.1e6 -M wbfm -s 200000 -r 48000 - | aplay -r 48k -f S16_LE
2) I installed: https://github.com/ha7ilm/qtcsdr ; it's a simple GUI front end to something like the above CLI tool. Here is a screen shot:
- QTCSDR_Screenshot.jpg (120.72 KiB) Viewed 16506 times
I can type in a frequency, or just click on anything of interest on the waterfall graph and the it will change to that frequency. I am still using the ridiculously small 14cm antenna that came with it, but placed by my windows does pick up quite a few radio stations as you can see by the waterfall chart above.
Above, I am centred on 94.1 - JJJ. The other dark line off to the left is 93.3 - Classic FM.
Now, onto trying to figure out how to build a AM demodulator in GNU Radio
Re: SDR Hardware??
Hey BeJay, what software did you use for your demo project at the Robofair?
Re: SDR Hardware??
Hi Guys,
Sorry I completely missed this post. I am using a $6 Realtek RTL2832U from ebay. On my netbook at Robofair I was running gqrx from http://gqrx.dk/ which is really nice and lightweight, but won't run on a pi - minimum is x86 2 cores. I hadn't found qtcsdr by that time to run on the pi, so I made a quick gambas touch screen GUI for rtl_fm.
I've also found there is a library for python https://github.com/roger-/pyrtlsdr , so I will attempt (time permitting) to make a GUI for that and the interface to the rotary encoders.
Sorry I completely missed this post. I am using a $6 Realtek RTL2832U from ebay. On my netbook at Robofair I was running gqrx from http://gqrx.dk/ which is really nice and lightweight, but won't run on a pi - minimum is x86 2 cores. I hadn't found qtcsdr by that time to run on the pi, so I made a quick gambas touch screen GUI for rtl_fm.
I've also found there is a library for python https://github.com/roger-/pyrtlsdr , so I will attempt (time permitting) to make a GUI for that and the interface to the rotary encoders.
Re: SDR Hardware??
Thanks for the info BeJay. I have never played with Gambas: http://gambas.sourceforge.net/en/main.html It looks interesting, but I might have a play with the Python module you mentioned. It's been donkeys years since I touched Visual Basic. That was my pre Delphi programming days.