alandyer

To convert BCD to decimal with VB6 try following: FsFreq = Val(Str(Hex(ReadFSValue))) 9349 will convert to 2485 which is correct for a COM1 Standby set at 124.85

Commonly, when dealing with flight models on rotating spherical bodies the body axes are rotated as the craft translates relative to the body. This is to keep the "down" body axes pointed at body center. What are referred to as LHLV coordinates. (Local Horizonal, Local Vertical). Even when there is no movement relative to body, there is movement relative to the intertial frame i.e. body is slowly rotating. (Sunsets are marvellous things). This might be what you are oberserving. (body rotation, not sunset :) Could also be calculation residues (rounding errors, etc). Best bet is FS team at Microsoft. However, they do not give out email, for obvious reasons.