Miniscope V4 cable length and scanlines

[Mohammad Khan]

Hello,

We recently tried acquiring from the Miniscope V4 using the v3.3 DAQ (using external power supply) and Bonsai. We were using a 3 meter long coaxial tether constructed from the open ephys coaxial tether kit (U.FL to SMA). When acquiring, we noted that there were scan lines present on the visualization of the captured video. We also bought a 3 meter long cable pre-assembled by Open Ephys, in case it was an error with assembling the cable, but we still see the issue when testing with the new cable. 

We assume that this is an issue with the length of the cable and not the assembly. What is the maximum length that we can acquire without seeing these scanlines?

Sincerely,
Mohammad Khan