The last 3 calibration measurements have ended in locklosses, todays, saturdays and last thursdays (these link to the lockloss tool webpages). The 3 locklosses look fairly similiar but looking at the ETMX signals, todays seemed a little stronger of a lockloss? Compared to Saturday and last thursday.
Looking at the same channels that Vlad did in 82878 and Ryan's above ETMX channels, the 42Hz growing wobble in DARM/ETMX seems to start as soon as the DAM1_EXC is ramped on to it's full amplitude, plot attached. The 42Hz is seen as an excitation into H1:SUS-ETMX_L2_CAL_EXC_OUT_DQ, plot attached. Maybe the ETM is not fully stable at that frequency?
Looking at a successful calibration sweep Feb 22nd 82973, There was no instability when the 42Hz oscillation was turned onto ETMX L2, plot attached.
The last 3 calibration measurements have ended in locklosses, todays, saturdays and last thursdays (these link to the lockloss tool webpages). The 3 locklosses look fairly similiar but looking at the ETMX signals, todays seemed a little stronger of a lockloss? Compared to Saturday and last thursday.
Last thursdays lockloss alog83239
Looking at the same channels that Vlad did in 82878 and Ryan's above ETMX channels, the 42Hz growing wobble in DARM/ETMX seems to start as soon as the DAM1_EXC is ramped on to it's full amplitude, plot attached. The 42Hz is seen as an excitation into H1:SUS-ETMX_L2_CAL_EXC_OUT_DQ, plot attached. Maybe the ETM is not fully stable at that frequency?
Looking at a successful calibration sweep Feb 22nd 82973, There was no instability when the 42Hz oscillation was turned onto ETMX L2, plot attached.