Use default value from sigma plot fitting
You can use
wN for 800MHz spectrometer=81.0960609953831 MHz
wN for 600MHz spectrometer=60.7908372 MHz
wH for 800MHz spectrometer=800.000000001 or 696.00000000087 MHz
wH for 600MHz spectrometer=599.8674144 or 521.884650528 MHz
Alpha=
Beta=
Frequency in MHz=