Chapter 1. The electronics
The CAEN V785 is a 12 bit, 32-channel analog to digital converter that returns a value related to the
maximum voltage that occurs during the time a gate is present. The input signal must be positive and less
than 4V. The V785 is a VME based module. For a complete understanding of the module I suggest that
you obtain a copy of the product manual, available as a PDF at http://www.caen.it/
1.1. A minimal Electronics Setup
The following items will be needed to build our simple setup:
• CAEN V785 ADC module
• VME Crate
• SBS Bit3 PCI/VME bus interface
• NIM Crate
• NIM Spectroscopy amplifier of some sort
• NIM Discriminator
• Two channels of NIM Gate and delay generator
• NIM Signal splitter
• LEMO to Ribbon cable converter
• VME CAEN V262 I/O module
• Pulser
• 50ohm LEMO terminator
• An assortment of LEMO Cables
• A 34 conductor ribbon cable with 3M connectors on each end
• An oscilloscope
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