Re: [amsat-bb] UHF Reference frequency for setting ppm offset in SDR.

On 2/8/20 5:14 PM, Roy Dean via AMSAT-BB wrote:

I did a google search on how I could better calibrate my el-cheapo SDR to receive HuskySat-1 (I use NOAA weather stations to calibrate roughly to VHF), and I found this article by WA1CYB:

https://www.amsat.org/wordpress/wp-content/uploads/2018/02/2017Symposium-SDR...

Sure enough, Channel 17 had a strong pilot tone at 488.309441 for me to use as a half-way decent reference! Hoping this can help others in the future.

For those in other parts of the world with GSM networks kalibrate-rtl can be an option to get to the same result. Source https://github.com/steve-m/kalibrate-rtl

My experiences at https://idefix.net/~koos/newsitem.cgi/1493498616

Koos PE4KH