January 21, 2016 All the Signal Chain equipment arrived safely at KPGO! The Signal Chain integration team travelled to Hawaii and began equipment checkout on January 8. They verified that nothing got damaged during shipping and proceeded with the backend installation, integration, and verification. Shown below are the configuration and pictures of the assembled backend. The left rack of the backend contains: 4 up-down converters (UDC) that down-convert the desired sky frequencies, 4 ROACH Digital Backend (RDBE) boxes, the RF Distribution box, the 10 MHz frequency distributor, and 2 time distribution amplifiers that provide references around the system. The right rack contains: the Mark6 recorders, the cable delay measurement system (CDMS) computer, the backend computer, and the switch on the top rails that allows sharing of the keyboard, video display, and mouse and network switches installed in the back of the rack. This January 15th photo shows an installed CDMS ground Unit, which arrived after the above video was made. The unit arrived later because it was completing antenna and ground unit testing at Westford alongside the Legacy Cable Calibration system when the rest of the equipment was shipped. This photo shows the cabling and labeling behind the backend rack now that it is fully integrated for subsystem tests.
