As I was building my bitx40 kit, I looked at the output of the Raduino board, and running standalone, it is a decent square wave signal, and it appears to have a coupling capacitor in the output, as the signal is centered at ground level. However, when connected to the bitx40, the signal is level shifted (which makes sense, as it is feeding a point with DC bias), but the waveform looks really horrible - sort of a very distorted triangle/sawtooth shape. Is this typical? The RX seems to work - in that I hear pretty much the same junk as I hear on my IC-718, but I was curious if the distortion I see is normal. Also, how does the drive level setting of the si5351 have any effect upon the mixer diodes (re the birdie at 7199 KHz), since the VFO signal is significantly buffered before injection?
73,
Dave, N6AFV
