This is the front of the M885 point plot display D/A board. It is used with the M869 (2.0M) point plot display control board to drive X/Y monitors like the VR14 monitor.
All the round adjustment pots on the board are to trim the D/A conversion so it can draw a straight line without jumps. The gray and blue ones in the upper right adjust board internal +-5V reference supplies.
Feel free to contact me, David Gesswein firstname.lastname@example.org
with any questions, comments on the web site, or if you have related equipment,
documentation, software etc. you are willing to part with. I am
interested in anything PDP-8
related, computers, peripherals used with them, DEC or third party, or