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2 hsd cards can talk to 1 data card, and each data card has 4 LR4 transceivers (2 per hsd-card). hsd card has a "mezzanine" component with analog input connectors, and a JESD connection through the usual xilinx MGT (serial connection) to a pcie carrier card.  There is a cable that connects the hsd card(s) (up to two) to the data card.   The FPGA is on the hsd pcie carrier card.

Then startup pv servers for both A&B (and potentially 2 cards hooked up to 1 data card) with: "hsdpvs -P DAQ:TMO:HSD:2_41:A" (currently these go on ct002).

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