ohhh MSO7000BLG, interesting to see that they not populated some sampling memory on both FPGAs, but there is no higher model but only with 32k (yet? who knows, they already have 3GHz SA - which was a shock for me as i never thought they will develop one, and now just found another one new gear from Hantek,
http://hantek.com/ProductDetail_8230.html).
Wondering as well what for are these UC22/23 near trigger section. It looks like additional drivers, probably you can see all 4 channels on these resistors R192/193 and R258/259.
For LAN hack it looks like on other models, LAN or rs232 with optocouplers and DM9xxx + crystal on mainboard.
Questions:
Can you make and share with us firmware dump?
What is the sampling rate when running 2 and 4 channels?
When you apply same signal to channels 1/2 and e.g. 1/3 how high is the skew between channels? (and is there function/menu in the firmware to change it?)