Author Topic: SDS7102V noise solved (Read 750 times)

Audiodave · « **on:** September 16, 2020, 10:41:07 pm »

Hi, My SDS7102V is fitted with the later power pcb, I had 2 types of noise, spikes from the power supply and signal noise, the 2 should not be confused, after reading many posts here I decided to take a look, as the newer power pcb has all the extra smd ceramic caps and other mods I decided to look elsewhere, I did the D127 mod, this made a big improvement, next I used 25mm copper emi tape across the foil/ferrite to the display, insulated with pvc tape, the copper foil bonds extremely well to the chassis, I did the same across the adapter board over L2 etc, ALL the spikes have gone on both channels, the noise floor is as pictured scope is at 2mv/div pics are grounded and probe in the air, if sufficient interest I will open it back up and take pics.