Assembled three more of the filter boards and installed them in the AIDA PSU with the first, wired to use the switchmode power supply.

Powered up nnaida14 first and went fine. Just the boot sequence and measure the voltages for stability.

Powered up the remainder and all was well.

Setup and go..... the rates were way too high in all of them.

nnaida12 was running at 200k/sec+ most of the time.

The other three could be reduced in rate by changing the slow comp thresh as would be expected but 12 wasn't any good.

Tried:

Remove MACB HDMI.... no good

isolate psu earth from NIM crate ( put psu on foam support ) ..... no good

Checked the filter output and the sine wave reported yesterday ( nnaida2 ) was present on all voltage rails but no evidence of high frequency noise.

Set all channels to 1GeV,  with Slow comp thresh of 10, and 11,13 & 14 showed roughly the same rate of 10 to 15k/sec. Peaks in the spectra were FWHM 12 at a random sample. nnaida12 would not conform.

Changed back to the bench power supply connections so Chris can continue.