4-6 Theory of Operation
4.6.1 Main Card –
Receives +12V, -12V, +3.3V, -3.3V, +5V, -5V, and “line sync” from Bulk AC power
supply.
Other I/O:
– BNC Channel and External inputs
– Probus
– Trigger out/pass fail BNC (rear panel)
– USB (pass thru)
– Power Switch (pass thru)
– Arm and Trigger LED (to front panel)
– Calibrator Output (front panel probe hook)
– External Clock Input through External BNC
Sub systems
– FE (50 Ohm, 1M Ohm)
– ADC and Acquisition Memory
– Timebase and Trigger
– 10GHz clock
– Controller FPGA
– uP Controller
– Power Supply
– NCO
– Probus
Communication with devices
– SPI
– Slow Serial interface (2MHz). Used for communication with DACs,
HFEs and FE control, NCO.
– JTAG
– Serial Interface for communicating with HTB, ADCs, and MAMs.
– 8B/10B Gigabit Ethernet
– Acqusition memory (MAM) readout
– I2C
– Probus
– Parallel Interface
– uC to Controller FPGA
– GPIO
– 16 bit general purpose I/O
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