Using the ADF4355-2 with a 10MHz reference in double mode for a 20MHz fpd. Using the eval board control software with step size set to 100KHz, I'm expecting a MOD2 = 200 which is the GCD result from the datasheet. However, the software keeps setting MOD2 to 16383 when in Auto mode.This give a slight VCO offset error. If I go manual mode and force MOD2 to 200, the error goes to 0 and no other flags are raised. The ADIsimPLL program likes the 200 also. Any ideas?