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stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
The NEMO DAQ electronics:
Actual characteristics and new features
NEMO tower layout
Secondary
Junction-Box
Tower Base
FCM
(Floor Control Module)OM-PMT &
FE electronics
Electrical link
Optical link
Optical link
40m
40m
40m
150m
Floor 16
Floor 15
Floor 2
Floor 1
PMT1 PMT2
PMT3 PMT4
10m
10Mbps
•The basic self consistent element is the tower
•Main components: o Optical module (PMT and FE)o Floor Control Moduleo Junction Box
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
•One floor data is received on shore by twin FCM board plugged on host machine
Data transmission
•Optical module data coming from 4 Front End modules (FEM)
FEM#2 FEM#3
FEM#0 FEM#1Sea
Shore
Storage and data manager
•Off shore data concentration is carried out by Floor Control Module Board (FCMB)
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
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
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
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
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
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 FPGAbridges optics and
OMs
Electro-Optical Interface:
Ser-Des (up to 1.4 Gbps) + DWDM
compliant Transceiver
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
Freescale DSP56301 with PCI 32/33 interface:• Board Debug• System control and management• On-shore data and slow control extraction• Measured sustained performance: 60MBps
Slow Control board connector: electrical link
with SPI interface
Time calibration connector:
• set calibration parameters• trigger optical pulses to OMs
Power Area: linear LDO regulators to minimize
noise.
On-shoreClock Input
Floor Control Module Board interfaces
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
Clock distribution:On shore
Time station (GPS)
Slow clock
PLL
Sys clock
Data
Data + clk to off shore
Sys clock
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
Clock distribution:Off shore
Sys clock
Data
Data + clk from on shore
Clock and data on the same fiber
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
The FCMB forNEMO phase 2
•FE embedded on FCMB
•New AD converters: one 12 bit 200 MHZ ADC per PMT
•New on shore interface (1 Gbit Ethernet or PCI Express)
Secondary
Junction-Box
Tower Base
FCM
(Floor Control Module)
OM-PMT
Analog signals
electrical link
Optical link
40m
40m
40m
150m
Floor 16
Floor 15
Floor 2
Floor 1 PMT1 PMT2
PMT3 PMT4
10m
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
The new FCMB
Optical Communication
Mezzanine
FPGAXilinx V5
FE Section
ADC #1
ADC #2
ADC #3
ADC #4
Amp & Co.
Amp & Co.
Amp & Co.
Amp & Co.
12 pairs LVDS
12 pairs LVDS
12 pairs LVDS
12 pairs LVDS
Debug
On shore Com
JTAG
Mem
FlashSRam
RS2323#1
PCIe
RS2323#2
Clk @ 200 MHz
RS232
PLL
Clk from shore
Localoscillat
or
From Time station
RJ 451GB
RJ 45
SystemClk
power
DC/DC
from floor module
Power to PMT and OM
Off shore instrumentation
hydrophones
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
NEMO phase 2
•FE embedded on FCMB
•One 12 bit 200 MHZ ADC per PMT
•Gbit Ethernet or PCI Express on shore interface
DC/DC power
•FE into OM
•Two 8 bit 100 MHZ ADC’s per PMT
•PCI on shore interface
•AC/DC power
NEMO phase 1 VS
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
The next phase:Copper data link
Secondary
Junction-Box
Tower Base
FCM
(Floor Control Module)OM-PMT &
FE electronics
Analog signals
electrical link
Optical link
40m
40m
40m
150m
Floor 16
Floor 15
Floor 2
Floor 1
PMT1 PMT2
PMT3 PMT4
10m
stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007
NewCommunication
Mezzanine
FPGAXilinx V5
FE Section
ADC #1
ADC #2
ADC #3
ADC #4
Amp & Co.
Amp & Co.
Amp & Co.
Amp & Co.
12 pairs LVDS
12 pairs LVDS
12 pairs LVDS
12 pairs LVDS
Debug
On shore Com
JTAG
Mem
FlashSRam
RS2323#1
PCIe
RS2323#2
Clk @ 200 MHz
RS232
PLL
Clk from shore
Localoscillat
or
From Time station
RJ 451GB
RJ 45
SystemClk
power
DC/DC
from floor module
Power to PMT and OM
Off shore instrumentation
hydrophones
The next phase:Copper data link