Reports until 07:00, Saturday 15 November 2025
H1 General
anthony.sanchez@LIGO.ORG - posted 07:00, Saturday 15 November 2025 - last comment - 09:26, Saturday 15 November 2025(88113)
LOWNOISE_ESD_ETMX Locking issue.

Called for the thrid time tonight:
First 2 times I just thought it was the wind kinda gusting too hard during LOWNOISE_ESD_ETMX as it was faily gusty between Costco & target here.
But.... this time the wind had calmed down significantly.

In the Last 4 Hours We have lost lock in the exact same spot 5 times.  Each time there is a Lownoise_ESD_ETMY state, then 4 seconds of Lownoise ETMX state then lockloss.

Troubleshooting: 
Maybe the issue is here: alog 88089. So I quickly reverted the changes in the code here right after power up, but I guess the power to the ITM ESD was tunt off as stated in that alog. So now I'm stuck at Transistion_From_ETMX with no way out except for manualing back to Lownoise_Coil_driver. Reverting my changes then Loading the guardian again and pushing forward to Lownoise_ESD_ETMY. 

Now  I'm hanging out at Low noise ESD ETMY for greater than 4 seconds, So we can rightfully say that the issue is in Lownoise_ESD_ETMX.
When I clicked into Lownoise_ESD_ETMX my Guardian back ground flashed red... indicating guardian issues , then:
E_X   (Nov 15 14:54:58 UTC)
E_Y   (Nov 15 14:54:58 UTC)
I_X   (Nov 15 14:54:58 UTC)
DRMI Unlocked   (Nov 15 14:54:58 UTC)
HAM6   (Nov 15 14:55:03 UTC)
ISC_LOCK state: DOWN   (Nov 15 14:55:04 UTC)
So the issue is certainly in LOWNOISE_ESD_ETMX. 

Comments related to this report
ryan.crouch@LIGO.ORG - 09:26, Saturday 15 November 2025 (88118)

This ended up being from a channel typo in a ezca call in LOWNOISE_ESD_ETMX.