Jennie and I were looking at the SPI with Sina during a call today and Sina pointed out there was no power on the first PDs on the SPI breadboard. She said there was a witness pd in there SPI laser chassis that could be checked with a multimeter next to the chamber, so I went and checked that this afternoon. I'm not totally sure what all of the labels meant, but I think there is no laser light on the pd in the interface chassis. The SPI_LP_M1_PD was at 0v, the other two, SPI_LPMON_M2_RFMEAS and SPI_LPMON_M3_RFREF were at ~.8v regardless of the state of the CDS control of the SPI pick off shutter, which I had Ryan toggling remotely. We've talked to Ryan and Jason about going into the PSL tomorrow to check the function of the SPI pick off shutter, I think we will also try to check the output of the fiber at the chassis with a laser card at least. Not sure how hard it would be to look with a power meter.