aLIGO LHO Logbook

H1 CDS

david.barker@LIGO.ORG - posted 10:42, Tuesday 09 September 2014 - last comment - 20:16, Tuesday 09 September 2014(13830)

h1oaf0, 16bit DAC adapter card replaced with PCIe card

WP4834 Jim and Dave

We replaced the 16bit DAC card in h1oaf0 (PCIX card on PCIe adapter) with a PCIe DAC card. This is the second DAC card in h1oaf0, the first is an 18bit DAC. Procedure was:

stop running models
take unit out of Dolphin fabric (local command)
power down CPU
power down IO Chassis
replace card
power up IO Chassis, power up CPU

This does not close out the WP, we have SUS EY and SEI EX still to complete.

Comments related to this report

david.barker@LIGO.ORG - 20:16, Tuesday 09 September 2014 (13845)

Link

Alastair, Jim, Aaron, Filiburto, Dave

Alastair later found that the new DAC card was not functioning correctly. We found that channel 12 was outputting 24V instead of 8.4V. We tried swapping out ribbon cable and interface cards, but eventually put the original DAC-on-carrier-card back in to get TCS back on track for this evening. We will investigate further later in the week.