I’ve wired one of the vector generator channels on a breadboard, and took two photos. It’s ready for testing, but at the moment I can’t find enough test leads to wire up the breadboard to my three-output bench power supply (HP E3631A), so I’ll have to kludge something up tomorrow.
Eventually this will have three identical channels, for X, Y, and Z. It’s a two-dimensional display, but in oscilloscopes and XY displays, the intensity is normally referred to as the Z axis. I only wired up one channel because I want to verify that the design works before wiring the other two.
The three channels will be identical except that two of them share a dual SPI DAC, and all three share the output buffer (needed to drive the 50 ohm impedance of the XY monitor I plan to use).