I use the Pyle Recorder from Amazon to record my Marcum VS485c camera. It has both analog and digital inputs with a built in converter and saves to an SD card. Its not as robust as I would like for repeated outdoor use, I broke the RCA connector on the first trip, but comes with almost everything you need except the RCA cable to connect the camera to the recorder.
https://www.amazon.ca/Pyle-Video-Gam...37837207&psc=1
Make sure you connect the cables firmly or the image recorded may have horizontal lines in it, like an old VCR but otherwise it works well.
Check out my footage here:
https://www.youtube.com/watch?v=dXZCOHdoQKo