Did some digging into the KD8CEC code.? In that version, there is not a globally defined value for the first IF.? There is in this segment hardcoded if values:
Note that there is a different value for the v4 vs v5 boards (all v4 and prior use the same code, as all v5 and later use that code).
I would think that by changing the USB and LSB values as well as the hardcoded 1st IF frequency you should be good.? NOTE: the settings in the Si5351 code have a max of 109.000MHz.? Above that, you will need to redo the Si5351 setup.? The code in that section is well commented on and includes an explanation of how the values were picked.
Had some spare time as was curious myself, so I dug into the other code.
73
Evan
AC9TU
