Oscilloscope Breakout for XProtoLab

My Carrier Board for the XProtoLab "Miniature mixed signal oscilloscope with an arbitrary waveform generator in a DIP module". The two analog input channels and the external trigger input are broken out to jacks, as is the AWG output; the analog input jacks are multed to output jacks.

Because the frequency counter mode has much higher precision on the trigger input, I'd intended to normal the trigger jack to the channel 1 input and protect it with a Schottkey diode voltage clamp (it can only handle up to around 6v and no negatives), but the protection didn't work when I got it back from the board house, so I broke the normalization, and you need to be extra careful with the input levels on that jack.