A lower frequency SDR?

Talk about other SDR products like the FunCube, HackRF, BladeRF etc.
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Bee Seventeen Bawmer
Posts: 2
Joined: Sat Oct 19, 2013 12:32 am

A lower frequency SDR?

Post by Bee Seventeen Bawmer » Sat Oct 19, 2013 4:04 am

Hello,

I am looking to receive lower frequency ranges in the area of 10 kHz plus or minus one or two, up to 15 MHz. (10kHz-15MHz

Is there any dongle out there now that can process this range?


I am very curious about these awesome little SDR dongles!

erikonkulis
Posts: 2
Joined: Thu Aug 29, 2013 10:25 am

Re: A lower frequency SDR?

Post by erikonkulis » Sat Oct 19, 2013 11:42 am

use upconverter

soooooil
Posts: 4
Joined: Thu Aug 29, 2013 11:30 am

Re: A lower frequency SDR?

Post by soooooil » Sat Oct 19, 2013 3:48 pm

Yes, upconverter would be the only (relatively cheap) choice here. But I doubt you'll be able to receive as low as 10 kHz, most upconverters work from few MHz and up. I believe the reason for this is that dongles AGC acts like crazy around LO frequency and you see only spurs. Theoretically it can be solved with a good bandstop filter but even then I doubt that 10 kHz is achievable.

Bee Seventeen Bawmer
Posts: 2
Joined: Sat Oct 19, 2013 12:32 am

Re: A lower frequency SDR?

Post by Bee Seventeen Bawmer » Thu Oct 24, 2013 4:31 pm

I have looked into the FunCube Dongle plus and they guarantee down to 150 kHz...

I am more focused on receiving the lower frequencies in the 10kHz-150kHz range, does anyone have any ideas on how to do this?

Is there a "lowconverter"?

soooooil
Posts: 4
Joined: Thu Aug 29, 2013 11:30 am

Re: A lower frequency SDR?

Post by soooooil » Thu Oct 24, 2013 5:57 pm

Well, yes, it's called upconverter :)
It does exactly what you want — shifts the lower frequency in the range where your sdr can receive.
The lower limit is slightly higher than DC only because of not ideal components. And there is not much you can do about it.

symp
Posts: 5
Joined: Thu Aug 29, 2013 11:35 pm

Re: A lower frequency SDR?

Post by symp » Thu Nov 14, 2013 12:58 am

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

Tim Bucknall
Posts: 3
Joined: Tue Dec 08, 2015 1:26 pm

Re: A lower frequency SDR?

Post by Tim Bucknall » Wed Dec 09, 2015 12:55 pm

a dxer I know is using Yosoo in direct sampling mode for these frequencies
http://skywavesdx.org/viewtopic.php?f=31&t=1982

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