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NEMO DAQ Electronics: Enhancements and Tower Layout Specifications

The NEMO DAQ system features advanced characteristics and a new tower layout with enhanced Floor Control Modules (FCMs). Key components include optical modules, Junction Boxes, and a robust data transmission system with speeds up to 10Mbps and distance capabilities of 150m. New features encompass improved ADC converters, a PCIe interface for onshore communications, and various electrical interfaces for seamless integration. With safe remote reconfiguration and precise time calibration, the NEMO system ensures efficient offshore data management and enhanced performance.

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NEMO DAQ Electronics: Enhancements and Tower Layout Specifications

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  1. The NEMO DAQ electronics: Actual characteristics and new features

  2. NEMO tower layout Electrical link FCM (Floor Control Module) OM-PMT & FE electronics Floor 16 10Mbps 40m Floor 15 40m Optical link 10m Floor 2 40m PMT4 PMT3 Floor 1 PMT1 PMT2 Optical link Tower Base 150m Secondary Junction-Box • The basic self • consistent element • is the tower • Main components: • Optical module • (PMT and FE) • Floor Control Module • Junction Box

  3. Data transmission Shore Storage and data manager FEM#0 FEM#1 Sea • Optical module data coming • from 4 Front End modules (FEM) • Off shore data concentration • is carried out by Floor Control • Module Board (FCMB) FEM#2 FEM#3 • One floor data is received • on shore by twin FCM board • plugged on host machine

  4. Front End Module Board • Signal sampling: • double 100 MHz 8 bit ADC’s • quasi-logarithmic compression • (13 bits) • On board calibration circuit • PMT HV management • Low power • Safe configuration from remote • Optical Module housekeeping

  5. Floor Control Module Board • Off shore - On shore link • FEM interface • Fiber Optic interface DWDM transceiver • Communication with other electronics: • Slow control board • Time Calibration • Other features: • Safe remote reconfiguration

  6. Electro-Optical Interface: Ser-Des (up to 1.4 Gbps) + DWDM compliant Transceiver Floor Control Module Board data bridge Electrical Interfaces for 4 Optical Modules (up to 8) • 3 Differential Lines: • Tx Clock line (5 MHz) • Tx Data line (5 Mbps) • Rx Data line (20 Mbps) Spartan-3 FPGA bridges optics and OMs

  7. Floor Control Module Board interfaces Slow Control board connector: electrical link with SPI interface Power Area: linear LDO regulators to minimize noise. On-shore Clock Input • Time calibration connector: • set calibration parameters • trigger optical pulses to OMs • Freescale DSP56301 with PCI 32/33 interface: • Board Debug • System control and management • On-shore data and slow control extraction • Measured sustained performance: 60MBps

  8. PLL Clock distribution: On shore Data + clk to off shore Sys clock Data Sys clock Slow clock Time station (GPS)

  9. Clock distribution: Off shore Sys clock Data + clk from on shore Data Clock and data on the same fiber

  10. The FCMB for NEMO phase 2 Analog signals FCM (Floor Control Module) OM-PMT • FE embedded on FCMB Floor 16 40m Floor 15 • New AD converters: • one 12 bit 200 MHZ • ADC per PMT 40m electricallink 10m Floor 2 • New on shore interface • (1 Gbit Ethernet • or PCI Express) 40m PMT4 PMT3 Floor 1 PMT1 PMT2 Optical link Tower Base 150m Secondary Junction-Box

  11. Mem Debug FE Section From Time station RS232 SRam Flash JTAG Clk @ 200 MHz RJ 45 12 pairs LVDS ADC #1 Amp & Co. Clk from shore 12 pairs LVDS System Clk PLL ADC #2 Local oscillator Amp & Co. FPGA Xilinx V5 12 pairs LVDS ADC #3 OpticalCommunication Mezzanine Amp & Co. 12 pairs LVDS ADC #4 Amp & Co. On shore Com power RS2323 #1 RJ 45 1GB DC/DC Power to PMT and OM RS2323 #2 hydrophones Off shore instrumentation from floor module PCIe The new FCMB

  12. VS NEMO phase 1 NEMO phase 2 • FE into OM • FE embedded on FCMB • Two 8 bit 100 MHZ • ADC’s per PMT • One 12 bit 200 MHZ • ADC per PMT • Gbit Ethernet • or PCI Express • on shore interface • PCI on shore interface • AC/DC power DC/DC power

  13. The next phase: Copper data link Analog signals FCM (Floor Control Module) OM-PMT & FE electronics Floor 16 40m Floor 15 40m electrical link 10m Floor 2 40m PMT4 PMT3 Floor 1 PMT1 PMT2 Optical link Tower Base 150m Secondary Junction-Box

  14. Mem Debug FE Section From Time station RS232 SRam Flash JTAG Clk @ 200 MHz RJ 45 12 pairs LVDS ADC #1 Amp & Co. Clk from shore 12 pairs LVDS System Clk PLL ADC #2 Local oscillator Amp & Co. FPGA Xilinx V5 12 pairs LVDS ADC #3 New Communication Mezzanine Amp & Co. 12 pairs LVDS ADC #4 Amp & Co. On shore Com power RS2323 #1 RJ 45 1GB DC/DC Power to PMT and OM RS2323 #2 hydrophones from floor module Off shore instrumentation PCIe The next phase: Copper data link

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