The Pickoff Card: Difference between revisions

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The large 50-conductor grey cables run between the Slope Box on each detector to the Pickoff cards in the VXI crates.
The large 50-conductor grey cables run between the Slope Box on each detector to the Pickoff cards in the VXI crates.


[[File:VXI Pickoff card top view.jpg]]
[[File:VXI Pickoff card top view.jpg|400px]]




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[[File:VXI Pickoff cards Bottom.jpg]]
[[File:VXI Pickoff cards Bottom.jpg|400px]]


===VXI Pickoff Card Features===
===VXI Pickoff Card Features===

Revision as of 16:01, February 9, 2023

Pickofflabeled.png

The VXI Pickoff Card (Before Upgrades)

The large 50-conductor grey cables run between the Slope Box on each detector to the Pickoff cards in the VXI crates.

VXI Pickoff card top view.jpg


The VXI Pickoff Card receives the single-ended signals for the Ge Center, Ge Sides, and BGO segments from the Slope Box. The VXI pickoff converts these to differential signal format before sending them to the digitizer.


VXI Pickoff cards Bottom.jpg

VXI Pickoff Card Features

There are three gain range options (jumper selectable from the bottom of the pickoff card) for the Ge Center: 2, 5, 10 MeV

There is a fixed Preamp Reset Clamp that drives the Ge Center back to baseline after a preamp reset. This sometimes has known oscillation problems (ringing) that can hinder resolution.

There is an analog output on the VXI board. This LEMO output is shaped similar to a NIM Spectroscopy Amplifier, it is NOT what gets sent to the digitizer.