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ISUAL Spectrophotometer Electronics

ISUAL Spectrophotometer Electronics. C. Ingraham. SP Electronics Functions. Integrate and Sample PM Tube Output Send Digitized Samples Serially to MM Create Sprite “Trigger” Signal Set Trigger Threshold Receive CDI Commands from DPU Provide Connections Among SP Subassemblies.

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ISUAL Spectrophotometer Electronics

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  1. ISUAL Spectrophotometer Electronics C. Ingraham

  2. SP Electronics Functions • Integrate and Sample PM Tube Output • Send Digitized Samples Serially to MM • Create Sprite “Trigger” Signal • Set Trigger Threshold • Receive CDI Commands from DPU • Provide Connections Among SP Subassemblies NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  3. SP Electronics Block Diagram Spectrophotometer Data Controller Block Diagram 1-Hz Samples To Mass Memory MUX SLOW INTEGRATOR ADC 10-kHz Samples To Mass Memory FAST INTEGRATOR (One Channel of Six) NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  4. SP Electronics Interfaces • Six Buffered Analog Signals from PM Tubes • Slow Serial Data to Mass Memory • Fast Serial Data to Mass Memory • CDI Commands from DPU • Sprite Trigger to DPU, MM • Six Lines to Stim LEDs • Six Filter Heater and Thermistor Connections • Two Survival Heater and Thermistor Connections • Electronics Power from Power Controller NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  5. SP Electrical (Analog) Board • Mounts Between SP Left & Right Halves • Mostly Connections • Six PM Tube Output Preamps • Six Stim LED Connections • Six Filter Heater and Thermistor Connections • Two Survival Heater and Thermistor Connections • +/- 12 Volts Analog Power from Power Controller • Filter Heater Power from Power Controller • Survival Heater Power from LVPS NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  6. SP Digital Electronics (IDC) • On IDC Board • Integrates Charge from PMT • Samples at 1 Hz and 10 kHz per Channel • 12-bit A/D Converter per Channel • Sends Serialized data to MM Buffers • Digitally Processes Selected Channel for Sprite Trigger • Adjustable Trigger Threshold NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  7. SP Electronics Development Status (1) • Single-Channel Test Board Built • Analog Section Tested with PMT • Digital Section Awaits FPGA • SP Electrical Board Designed and Built • All EEE Parts Selected, Ordered, and Received NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  8. SP Electronics Development Status (2) • Drawings Released: • Electrical Board Outline (8621) • Electrical Board Schematic (8623) • Electrical Board BOM (8624) • Electrical Board PCB Design (8625) • IDC PCB Schematic (8544) • SP Test Board Schematic (8646) NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  9. SP Electrical Board Schematic NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  10. SP Electrical Printed Circuit Board NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  11. SP Circuits on IDC (1 of 2) NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

  12. SP Circuits on IDC (2 of 2) NCKU UCB Tohoku CDR 9 July, 2001 Spectrophotometer Electronics C. Ingraham

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