hugh.radkins@LIGO.ORG - posted 11:51, Tuesday 07 July 2015 - last comment - 14:34, Tuesday 07 July 2015(19467)
SEI STS2 Instrument Dance--A=>B, B=> EndX; Xend T240 out
STS2-B (ITMY) was sn109827. STS2-A (HAM2-actually located in BierGarten on temp cable) was sn89950. 109827 has moved to endX to replace the T240 that has been there for some time. This T240 will relocate to the ETF lab. There is no instrument connected to the STS2-A chassis and sn89950 is now connected to the STS2-B chassis.
All temporary cable to accommodate the T240 as well as the T240 chassis remain in place. The T240 chassis is powered off.
Here are Spectra for the ETMX ITMY and HAM5 STS2s. Previously, the curent ITMY unit which was previously collected on the HAM2 channel looked iffy. I must say it looks a little bit better now with pretty equal signal with the HAM5 (STS2-C) unit above 100mHz. However, below 100mHz, where tilt starts to play games and things diverge, I can't be sure if it is tilt or a problem. The unit at ETMX now looks pretty good and comparable to the HAM5 unit. Winds where 10-15mph during this measurement time.