Data Acquisition Group Fiber Optic System Review

Transcription

1 Data Acquisition Group Fiber Optic System Review June 10, 2002 SJD / TAB 1

2 DAQ EVLA Tasks Fiber in the ground and in Antennas Cable Wrap Digital Transmission System Digitizer/Formatter Module MCB in the Antennas LO lasers and Receivers Fiber Patch Panels - IF, LO, MCB SJD / TAB 2

3 Fiber Cable Plan SJD / TAB 3

4 Ditchwitch Trencher SJD / TAB 4

5 I F Patch Panel 12 WDM per FIber LO Patch Panel M&C Patch Panel (TX & RX) 74 Fibers 148 Fibers 148 Fibers Array FO Termination Room Array Distribution Panel Space Reserv ed E Array Option (360 Fibers) West Arm Fiber Entrance (28 Pads, 336 Fibers) North Arm Fiber Entrance (23 Pads, 276 Fibers) East Arm Fiber Entrance (23 Pads, 276 Fibers) SJD / TAB 5

6 Cable-Temperature Stabilized SJD / TAB 6

7 Fiber Cable Wrap Watch Spring Design SJD / TAB 7

8 CB Main Distribution Frame SJD / TAB 8

9 8.5in. 14.5in. 17.0in. 36.0in.(max) SS Splice Enclosure 2" Liquid-Tight FMC 19.0in. (min) Antenna Umbilical Jumper Connector 1 5/8" Unitstrut 6" X 2" Threaded PVC 45 degree Y Track Level Unistrut set in Concrete to 18" depth SJD / TAB Existing 6" Waveguide Conduit 9

10 ITT Industries, Cannon 12 Single mode FOMC FOMC 12C Plug Assembly P/N with Break-Away style assembly SJD / TAB 10

11 EVLA North Arm Fiber Cable Plan DN2 DN3 DN4 DN5 DN6 DN7 DN8 DN9 CN5 CN6 CN7 CN8 CN9 STDN.01 STCN.01 TDN 96 f iber 2,604 f t 60 f iber 4,173 f t TCN TBN 60 f iber 12,965 f t Control Building AN9 AN8 AN7 AN6 AN5 BN9 BN8 BN7 BN6 BN5 STAN.03 STAN.02 STBN.01 Symbol Key TANc AN9 STAN.03 Splice Manhole Trunk Cable Homerun Cable TANc 36 f iber 20,709 f t SJD / TAB 11 TANb 60 f iber 13,642 f t STAN.01 TANa 60 f iber 12,965 f t

12 Cable Burial Plan Direct Burial Splice Box 12

13 Typical Termination Room SJD / TAB 13

14 Termination Floor Plan West North East System SJD / TAB 14 9'-5" 4'-0" 1'-10" 3'-7" Splice (future) Splice 4'- 10" 3'- 0" 12'-6" 20'-4"

15 Termination Panel SJD / TAB 15

16 Patch Panels Similar to Termination Panel MCB Located in Control Room LO Located in Data Rack Area IF Located in the Correlator Room SJD / TAB 16

17 MCB Network Standard Ethernet ( two Fibers ) COTS Network Router 1 Gbit/s to antennas 100 Mbit/s in the antennas and Control Room Support ~48 nodes in each antenna Two multi-mode fibers per node Fiber to each Module Patch Panel will be located in the Control room SJD / TAB 17

18 MCB Network Hardware 1 Gbit/s Transceivers Typical Equipment used to determine RFI Will be installed in shielded enclosure in the Antennas SJD / TAB 18

19 LO System Responsible for Lasers, Modulators, Fiber, Circulators, Receivers Integrated into the LO module Phase stable system LO Patch panel located in the Data Rack Area Fiber test equipment System Self-tests included SJD / TAB 19

20 LO Block Diagram MASTER OFFSET GENERATOR MASTER LO MASTER LO 128 Hz 5 MHz 128 Hz TO PHASE MONITOR DCS SYSTEM ROUND TRIP PHASE MEASUREMENT ZERO CROSSING DETECTOR PLL 512 MHz VCXO 512 MHz VCO PLL 512 MHz Hz MASTER LO GENERATOR 512 MHz CENTERAL FO SYSTEM MOD DEMOD LASER OPTICAL ANTENNA FO SYSTEM circulator SJD / TAB 20 DEMOD PLL CLEAN UP LO REFERENCE RECEIVER 512 MHz VCXO 512 MHz

21 IF Parameters Bit Rate / Channel Number WDM Channels Channel Spacing Channel Wavelengths Bit Error Rate Digital RMS SNR (Q) Maximum Fiber Length Minimum Fiber Length Operation Temperature 10 Gbits/s 12 Channels 200 GHz Spacing C-Band 10-9 Initial, 10-6 Final 6 - Initial, Final 21.6 km 625 m -12 C to 35 C SJD / TAB 21

22 IF Signal Path SJD / TAB 22

23 IF Patch Panel Located in the Correlator room Includes Fiber Amplifiers Provides signals for De-MUX hardware Manual Test Equipment Full Signal Communication Analyzer Optical Spectrum Analyzer SJD / TAB 23

24 Rack Mount EDFA MCB adjustable Gain of each amplifier Also measures in/out optical power SJD / TAB 24

25 DAQ EVLA Budget Dollars in Millions Years $ per Year Running total SJD / TAB 25

26 2002 Fiber Schedule Conduit to Manhole Feb 2002 Procure Trencher Feb 2002 RFI of MCB hardware Jun 2002 Install MCB network in AOC July 2002 Take Delivery of Fiber Cable Aug 2002 Cable spool to AOC Aug 2002 First Fiber in the ground Oct 2002 Start Termination Panel Sept 2002 SJD / TAB 26

27 2003 Fiber Schedule Bench integration MCB & IF Jan 2003 Patch Panel locations finalized Jan 2003 Accessible MCB from AOC Feb 2003 To Barn, Master Pad and test Pad (CW5) Bench Integration LO system Mar 2003 Install Fiber on test antenna April 2003 Install MCB hardware on test antenna May 2003 Install DTS & LO on test antenna June 2003 Install de-formatter and D-to-A July 2003 Decommission West-arm waveguide June 2006 SJD / TAB 27

28 Conclusion Three systems will be supported On Board Tests Incorporated ( MCB) Patch Panels will have test equipment IF Data Format supports Growth New Mexico Array and VLBA Fiber System supports Growth E Array, New Mexico Array and VLBA SJD / TAB 28

29 RF BaseBand (8) 2-4 GHz Bands Left Polarization Right Polarization UX Converter Four GHz Bands IF A IF B IF C IF D Down Converter Down Converter Down Converter Down Converter Two 3-bit One 8-bit Samplers A Two 3-bit One 8-bit Samplers B Two 3-bit One 8-bit Samplers C Two 3-bit One 8-bit Samplers D De-multiplexer 3/16 bits wide De-multiplexer 3/16 bits wide De-multiplexer 3/16 bits wide De-multiplexer 3/16 bits wide IF-A Three 128 bit Formatters L2_IF-L Three 128 bit Formatters L1_IF-R Three128 bit Formatters L2_IF-R Three 128 bit Formatters Lasers Lasers Lasers Lasers L-1 L-2 L-3 L-4 L-5 L-6 L-7 L-8 L-9 L-10 L-11 L-12 Passive Optical Coupler SJD / TAB 29 Single optical fiber

30 IF Transmitters Twelve Lasers ITU Channels GHz spacing Automated Test Output Power Measured at Each Laser Test Patterns in Formatter MCB accessible Manual Optical Power Measurements Can be measured at the MUX output SJD / TAB 30

31 Proposed Frame Format EVLA Memo #33 SJD / TAB 31