Search found 2373 matches

by rtlsdrblog
Sun May 10, 2015 9:56 pm
Forum: RTL-SDR Discussion
Topic: 2,4 Ghz Down converter
Replies: 4
Views: 7849

Re: 2,4 Ghz Down converter

If you're looking at freq's above 2.4 GHz, i'd think that the 2.4 - 2.6 one would work better, though both will probably work just fine. He probably just chose that one as they are much more common.
by rtlsdrblog
Sun May 10, 2015 5:08 am
Forum: Troubleshooting Help
Topic: AM Antenna Setup Help for RTL-SDR USB
Replies: 3
Views: 5088

Re: AM Antenna Setup Help for RTL-SDR USB

I looked up the specs of that antenna, and the AM section is 300 Ohms. For optimal reception you'd connect it to a 4:1 balun first to take it down to 75 Ohms - you can find cheap ones made for TV connections, they might be called a matching transformer or similar. Maybe one like this? http://www.eba...
by rtlsdrblog
Sat May 09, 2015 11:09 pm
Forum: Troubleshooting Help
Topic: AM Antenna Setup Help for RTL-SDR USB
Replies: 3
Views: 5088

Re: AM Antenna Setup Help for RTL-SDR USB

What type of antenna is it? If it's a long wire antenna you might want to use something like a 9:1 balun.
by rtlsdrblog
Thu May 07, 2015 4:16 am
Forum: Other SDR Devices
Topic: SDR for VLF/LF
Replies: 3
Views: 10075

Re: SDR for VLF/LF

You could try an upconverter for the RTL-SDR that works well at VLF: e.g http://www.rtl-sdr.com/comparing-ham-up ... converter/

Other than that there might be some conversion mods for radios like the SoftRock that let them work well at VLF.
by rtlsdrblog
Thu May 07, 2015 4:09 am
Forum: Troubleshooting Help
Topic: Some Frequencies Work Others Do Not
Replies: 4
Views: 4908

Re: Some Frequencies Work Others Do Not

A screenshot would really help, if possible. But to me it sounds like you simply have the wrong demodulation mode selected. In the top of the SDR# menu under the Radio tab there is the mode selection buttons. For listening to broadcast FM radio you want "WFM", for voice and narrow FM modes you want ...
by rtlsdrblog
Thu May 07, 2015 4:04 am
Forum: Troubleshooting Help
Topic: rtl sdr error codes -1
Replies: 1
Views: 4368

Re: rtl sdr error codes -1

Are you running on Linux? Did you unload the DVB-T drivers? rmmod dvb_usb_rtl28xxu or for a permanent solution, create a text file “rtlsdr.conf” in /etc/modprobe.d and add the line “blacklist dvb_usb_rtl28xxu”. Failing that, have you tested it on Windows or another PC? There is also the possibility ...
by rtlsdrblog
Thu May 07, 2015 4:01 am
Forum: RTL-SDR Discussion
Topic: Auto scan for cctv video signal
Replies: 1
Views: 3381

Re: Auto scan for cctv video signal

I don't think there's an easy way to automatically scan it. You could do a frequency sweep over a few hours with rtl_power, and look for signs of CCTV broadcasts.
by rtlsdrblog
Thu May 07, 2015 3:59 am
Forum: Troubleshooting Help
Topic: Tuner role in SDR mode [rtl2832u+r820t]
Replies: 1
Views: 3537

Re: Tuner role in SDR mode [rtl2832u+r820t]

The SDR mode uses a different driver to the TV ones. So I think you set the debug mode in the TV drivers only. I'm unsure how to set the debug mode in the SDR drivers, but you might be able to look through the code on http://sdr.osmocom.org/trac/wiki/rtl-sdr.
by rtlsdrblog
Sun May 03, 2015 10:27 pm
Forum: Other SDR Devices
Topic: SDR for VLF/LF
Replies: 3
Views: 10075

Re: SDR for VLF/LF

You can just use your PC sound card to receive those VLF freqs: e.g. http://www.rtl-sdr.com/receiving-vlf-pc ... nna-saqrx/
by rtlsdrblog
Sun May 03, 2015 10:22 pm
Forum: Troubleshooting Help
Topic: 2 Nooelec Dongles wont run same time
Replies: 9
Views: 8946

Re: 2 Nooelec Dongles wont run same time

I assume you've set PDW up to listen to the different audio cables? Not sure what could be wrong, did you check the VAC settings for each cable and made sure that they're the same as the working one? Also, instead of two SDR#'s you could try the AUX VFO plugin if both pager freqs are near each other...