AFE Specifications

1
AFE Specifications

• General
• Mechanical
• Supply Bias Voltage
• Monitor/Regulate Cassette Temp
• Discriminated Signals to L1/DAQ
• Analog Information for calibration
• For 40K gain, nominal bias 1PE 7fC
• Mechanical
• Properly fit cassette, backplane connectors, high
  density connectors
• Mounted LHB/RHB w/o inter- or intra- cassette
  contact
• Bias Voltage
• Independent bias voltages to each of the eight
  VLPC modules DONE
• Range/Resolution 0-10V/50 mV DONE
• Stability lt 50 mV
• Temperature Control
• Range 1-10V DONE
• Resolution 40mV DONE
• Stability lt 0.1K

2
Discriminated Signals

• Standard Noise Test Conditions
• LAB3 Cryostat
• Operating cryogenics bias controls
• Operating matching board
• Single threshold per SIFT
• Pattern Results
• Average input 1.5PE
• One of four channels illuminated
• False reading or noise rate lt 0.5
• Threshold variance of 128 channels lt 0.5 PE or
  simulated trigger efficiency gt 95
• All 64 channels of an MCM (not simultaneously
  illuminated)
• Transmission to DFE
• Errors/board less than 10-3
• Proper Output link, line, time slice DONE
• 53 MHz DONE
• Transmission To Sequencer
• Error rate less than 10-9
• Complete lt 7-8 us.
• 20 MHz background test

3
Analog Specifications

• Readout
• Dynamically requested addition of amplitude
  through SVX to sequencer
• Error rate lt 10-9. No information lost, bits
  dropped, signal variations induced.
• Available before Silicon.
• Data Quality
• Fitting routines can separate 1st and 2nd PE
  peaks for 50 of channels for each MCM for high
  gain cassette
• For low gain cassette