Hi Evan,?
I applied the correction factor 1Hz=875 on the display, therefore 165050. Now the Main Clock (Clk#2) is aligned at 55 MHz and verified with a frequency meter calibrated with GPSDO.
I continued with the work, and I realized that Clk#1 did not vary with the lsb/usb command. It remained at 56.050 MHz.
At this point I took Farhan's V6.3.1 sketch and tried to compile it with Arduino IDE V1.8.19.
A series of error messages.
Attached is the pdf file with the reported errors.
I would ask you and the other users of the Group who read us, where to correct the source to have a correct compilation.
Thanks to all.
73, de IK0XBC - Andrea - Roma - Italy