February 25, 2009 online meeting minutes

present: Sergey Boyarinov

1. JLAB discriminators

• remove preamplifiers (at least reduce gain): can be done by not-installing some components; different amplifiers can be installed

• mask outputs

• add test input: directly to digital side

• individual channel thresholds, min 10 mV - real

• add second output connector (or high dense connector ?): yes

• different thresholds for output 1 and output 2 (optional; maybe sacrofise individual threshold, maybe groups of 4 etc)

• individual programmable width step: 8ns -> 4ns, the less the better; max=100ns; non-updating mode

• channel-based output delays for trigger output connector - optional, 500ns max

• 32-channel: will try (backplane board ?)

• fast enough: min 150MHz

• internal delay (20 ns is Ok)

• thermodrift - to be studied

• remove monitor

• not-stop scaler readout - optional

• keep gate/veto (2 inputs)

• OR for trigger output (NIM)

• VME readout: write/read all registers, A32/D64 with DMA