david.barker@LIGO.ORG - posted 08:58, Tuesday 07 April 2026 - last comment - 13:14, Tuesday 07 April 2026(89803)
h1seih7 recovery work ongoing
Erik is powering down the h1seih7 system to continue our recovery work. First up: replace the timing card to see if we can get the 16bit-DAC operational again.
I replaced the timing card, DAC 0, DAC0 adapter and ribbon cable as part of the repair.
Replacing DAC0 fixed the issue, though it's now running without problems on the test stand. So our best guess it the card needed to be reseated.
Installed timing card SN: S2101145 firmware version 0x635
Installed DAC SN: 171013-10
Installed DAC adapter SN: S1500315