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Low frequency SDR spectrum analyzer

Posted: Sat Oct 31, 2020 4:44 am
by planck
I am looking for an SDR spectrum analyzer like this:
1. Support frequency range: 50kHz-1MHz;
2. Android software;
3. It is better to have windows software if possible;
4, If possible, it is better to support dual power supply: mobile phone and external independent power supply; Because it may take a long time to work.
But the first and second above are the most important.

Any suggestion ? Many thanks.

Re: Low frequency SDR spectrum analyzer

Posted: Sat Oct 31, 2020 8:26 pm
by Username
I use this one: https://airspy.com/airspy-hf-discovery the are very good. The have an Update who support a wider Bandwith. :D

Re: Low frequency SDR spectrum analyzer

Posted: Sat Oct 31, 2020 8:50 pm
by sdrmatlab
airspy hf discovery is the best thing for HF SDR.

169 Bucks, but worth it.

filters in front of A/D's, poly-phase sampling. very very sensitive radio.

i often use 192khz BW for weak AM and SSB signals.

a great radio that i use with my homemade loop antenna.

Re: Low frequency SDR spectrum analyzer

Posted: Sun Nov 01, 2020 9:12 am
by planck
Username wrote:
Sat Oct 31, 2020 8:26 pm
I use this one: https://airspy.com/airspy-hf-discovery the are very good. The have an Update who support a wider Bandwith. :D
It looks great, down to 500Hz.
However... it does not seem to support any software for Android?
Thanks again, I will continue to pay attention.

Re: Low frequency SDR spectrum analyzer

Posted: Sun Nov 01, 2020 9:37 am
by planck
sdrmatlab wrote:
Sat Oct 31, 2020 8:50 pm
airspy hf discovery is the best thing for HF SDR.

169 Bucks, but worth it.

filters in front of A/D's, poly-phase sampling. very very sensitive radio.

i often use 192khz BW for weak AM and SSB signals.

a great radio that i use with my homemade loop antenna.
Thank you very much, you all mentioned airspy at the same time.

Re: Low frequency SDR spectrum analyzer

Posted: Mon Nov 02, 2020 1:56 am
by hotpaw2
Airspy provides an open source library on GitHub for the HF+ and HF+ Discovery. If you do Android development, you might be able to build an Android version of the library (libairspyhf) and connect it to hfp_tcp (also open source on GitHub). hfp_tcp will allow any RTL-TCP app that supports the AirSpy's sample rates to use the HF+.

I don't do Android, but I did something similar for iOS. So using a Raspberry Pi 4 for the USB connection, I can connect to an HF+ from my iPhone.