KKmoon FY6900-100M Function Generator
I have recently (2020-08-07) bought a new function generator for my electronics lab. It is a cheap(-ish) Chinese 2 channel 100 MHz DDS arbitrary waveform generator.
The KKmoon brand seems to be just an OEM by Feeltech.

FY6900 Function generator set to generate slowly rotating Lissajous patterns on an oscilloscope in XY mode

Lissajous patterns on my Hitachi V-1565 analog oscilloscope
Some useful links Link to heading
- FY6800 review and tutorial (different model, but the UI is similar)
- Manufacturer’s website?
- User guide, software, communication protocol specs
- External 10MHz reference mod
- Python library (not tested yet)
- Videos by SDG electronics: teardown, PSU mod
Unfortunately, it does not have a frequency reference input, but given that I currently have no precision clocks nor a GPS disciplined oscillator, this does not trouble me too much. There is a way to modify the instrument to add this capability, see the links above.
I will try update this page each time I find something interesting.