Pulsar Instruments

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==== The PSRIX2 System ==== For pulsar observations with the C+/K/Qu band receivers, the 4 or 8GHz outputs are processed using the wideband ADCs and the ROACH2 in 2GHz basebands. In addition the 7Beam signals can be processed by this system to generate a 512-channel full Stokes output down to 50μs. Refer to the figure below to get an overview of the system set up. {{ :pulsarinstruments:pffts_overview.png?300|PSRIX2 Block diagram}} The PSRIX2 system consists of 4x ROACH2 boards, a gain control and an ADC calibration unit. All of these systems have their own RaspBerry Pi controls and can be accessed either as ''pulsar@asterix'' or as ''spobs@uptotrix'' machines. Details on controlling the ROACH2 clocks, [[:pulsarinstruments:psrix2:gain_atten_ctrl|attenuation/gains ]] and the ADC Cals are listed separately.