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Chapter 5 Block Diagram
Block Diagram
4
5
The Sync output signal is generated as a waveform from the FPGA to the
Sync DAC.
External trigger in and out is chassis referenced at the BNC connector
but is isolated before the FPGA.
Modulation in is an isolated input applied to the A/D converter. The
FPGA applies the modulation in signal to the output waveform.
The clock generator for the waveform generator employs a 10-MHz
TCXO (OCXO for Option 010) and a phase-locked loop to generate the
250-MHz clocks used by the FPGA and Waveform DACs. When an
external 10-MHz frequency reference is used, a digital phase-locked loop
in the FPGA keeps the TCXO (or OCXO) in sync.
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