𝙐𝙎𝘼 𝙎𝙖𝙩𝙘𝙤𝙢™ on Twitter: "Added external reference input to #Pluto SDR. Using @LeoBodnar Mini Precision GPS Reference Clock. No more correction needed in Pluto Streamer. #XRIT center frequency looking pretty good now!
Accurate Time On Your Pi, The Extreme Way | Hackaday
Building an accurate Frequency Standard
Leo Bodnar ICOM IC-9700 Reference Injection (Locking) Board - VK3FS