Search found 5 matches

by symp
Thu Nov 14, 2013 12:58 am
Forum: Other SDR Devices
Topic: A lower frequency SDR?
Replies: 6
Views: 17995

Re: A lower frequency SDR?

You don't need an SDR, just use your soundcard, a basic modern soundcard should get you from 0hz to 96khz just do some googling
by symp
Mon Sep 02, 2013 11:56 pm
Forum: Antennas
Topic: Portable Wideband Antenna
Replies: 3
Views: 21525

Re: Portable Wideband Antenna

Hi Matt, If you are serious about wanting to cover that much spectrum you will need more than 1 antenna, I would be dubious of anything claming more than 1ghz of bandwidth, you might want to use a whip for VHF/UHF and maybe a PCB log periodic for the microwave bands.....If your just casual with your...
by symp
Mon Sep 02, 2013 11:22 pm
Forum: RTL-SDR Discussion
Topic: USB shield mod
Replies: 7
Views: 13739

Re: USB shield mod

The problem is that they have connected the USB connector shield to the ground of the dongle, this means that when using a shielded cable, the FM intermod is much worse as the usb cable shield is partially acting as an antenna. The key is to keep the usb cable shielded, but not connect the shield to...
by symp
Fri Aug 30, 2013 1:54 am
Forum: Antennas
Topic: The Antenna is key!
Replies: 2
Views: 12328

Re: The Antenna is key!

It's worth noting that the stock antenna is actually capable of receiving local strong UHF NFM as well as others, the main problem is that the cable is not shielded. The MCX>Belling-Lee adapter that came with my R820T was just a piece of twin core insulated wire, not coax. If you have no other optio...
by symp
Fri Aug 30, 2013 12:05 am
Forum: Signal Identification Help
Topic: Does someone know database with protocol-frequency data?
Replies: 5
Views: 14046

Re: Does someone know database with protocol-frequency data

Vince is spot on. It depends on your country. Start with the band plans: US: http://www.ntia.doc.gov/files/ntia/publications/spectrum_wall_chart_aug2011.pdf UK: http://www.onlineconversion.com/downloads/uk_frequency_allocations_chart.pdf Then you can use an online database such as http://qrg.globalt...