[time-nuts] Homebrew frequency counter, need help

[LiAng]

Thanks for the info.

What's the standard to be 11 digits/s? For real 11 digits/s, the ADEV 
needs to reach the 1e-11 level? I'm not sure if my GPSDO & Rb is stable 
enough. Maybe 2 MV89A as the refclk and signal?


TDC-GP22 has it problem, I will post some data/schematic/source code 
about it later. 

Thanks