Evan G., Jeff K.

We shuttered the Pcal Y laser for a short test starting at 02:43:19 Nov 30 2016 UTC (un-shuttered at 2:51:45). This is the final nail in the coffin that Pcal injection at 1083.7 Hz is **NOT** [edited] causing 1080 Hz glitching. The glitch rate remains unchanged.

This follows another test from Jeff, turning off the 1083.7 Hz line, but leaving the Pcal laser un-shuttered (see LHO aLOG 31610). This previous test showed that the glitch rate was unchanged when the calibration line injection was turned off.

In the attached image, from -10 to -5 minutes, the Pcal laser is shuttered, but the glitching at 1080 Hz remains.