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EVLA Advisory Committee Meeting System Status

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Presentation on theme: "EVLA Advisory Committee Meeting System Status"— Presentation transcript:

1 EVLA Advisory Committee Meeting System Status
Jim Jackson, Hardware Systems Engineer 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

2 EVLA Advisor Committee
System Status Status of first three antennas Digitizer status Synthesizer test results Things to do System block diagrams 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

3 EVLA Advisor Committee
System Status Antenna 13 First EVLA Prototype - Antenna 13 X and L bands available C, K and Q band available Dec 2004 Equipped with two IF channels Mostly prototype hardware Will be updated with production hardware after 2nd and 3rd antennas (14 and 16) are completed Tests and evaluation on-going 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

4 EVLA Advisor Committee
System Status Antenna 13 First Light Antenna 13 (X-Band) October 2003 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

5 EVLA Advisor Committee
System Status Antenna 13 1st EVLA Prototype - Antenna 13 First Fringes X-Band – March 2004 First Fringes L-Band – July 2004 K and Q band available Dec 2004 Tests and evaluation on-going Will upgrade to four IF channels and production hardware in early 2005 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

6 Fringe Phase Antenna 13 w/ VLA
11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

7 EVLA Advisor Committee
System Status Antenna 14 2nd EVLA Prototype - Antenna 14 One IF at X band December 2004 Four IF channels available January 2005 L, C, K and Q bands available Jan 2005 Mostly prototypes of production hardware Plan to begin routine observation with VLA Feb 2005 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

8 EVLA Advisor Committee
System Status Antenna 14 2nd EVLA Prototype - Antenna 14 First Fringes X-Band – Dec With VLA and 1st EVLA Prototype (Ant 13) Tests and evaluation on-going 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

9 EVLA Advisor Committee
System Status Antenna 16 1st EVLA production antenna Antenna 16 Currently in antenna barn Bearing change completed Vertex room gutting in progress Fiber & electrical wiring being installed Electronics hardware Being fabricated in lab 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

10 EVLA Advisor Committee
Hardware Status Hardware currently installed and operating in the VLA control building: L350 Central Reference Generator L351 Master Offset Generator L353 LO Transmitter L354 LO Distribution DTS Receiver Boards (3) P301 Power Supply 48 VDC Bulk Power Supply and Batteries 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

11 EVLA Advisor Committee
Hardware Status Hardware currently installed in Antenna 13: L301(x2)/L302 Synthesizers L304 LO/Reference Receiver L305 Antenna Reference Generator T304(x2) Downconverter D301/D303 Sampler/DTS Modules P301 Power Supply (x2) Cisco Network Switch 48 VDC Bulk Power Supply and Batteries 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

12 EVLA Advisor Committee
Hardware Status Hardware currently installed in Antenna 14: L302 Synthesizers (2nd Generation) L304 LO/Reference Receiver (2nd Generation) L305 Antenna Reference Generator T304 Downconverter (Integrated prototype) D302 Sampler/DTS Modules (2nd Generation) P301 Power Supply (2nd Generation) Cisco Network Switch 48 VDC Bulk Power Supply and Batteries 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

13 EVLA Advisor Committee
Hardware Status Fiber optics Fiber burial on all three arms complete Antenna 14 fully connected at master pad Antenna 13 fully connected at W10/CW5 Fiber spliced to end of west arm for round trip phase testing LO/Reference fiber phase characterization continuing 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

14 EVLA Advisor Committee
Digitizers 8-bit, 2 Gsps digitizer New single chip design using Atmel 8 bit, 2 Gsps device Installed in DTS module and in use on Antenna 14 Used for transition and observation in high RFI bands 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

15 EVLA Advisor Committee
Digitizers Recreated Waveform 8 Bit Digitizer Processed thru fiber link and FIR filters Output from D/A converter on deformatter 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

16 EVLA Advisor Committee
Digitizers 3-bit, 4 Gsps digitizer ALMA – 3 bit, 4 Gsps, 4 GHz BW under development in France Rockwell – 6 Bit, 6 Gsps, 12 GHz BW Supposedly sampling next Jan 2005 Atmel - 8 bit, 4 Gsps, 5 GHz BW in development 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

17 L301 Synthesizer Phase Noise
11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

18 L302 Synthesizer Phase Noise
11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

19 L302 Synthesizer Long Term & dT Phase Drift
11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

20 L302 Synthesizer 20 degree dT
11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

21 L302 Synthesizer Stability
Direct relation to temperature Long term drift at constant temperature ~ deg / min (source unknown) ~ deg / min / GHz 8x better than spec of deg / min / GHz Phase change with temperature 0.25 deg / hr / 0C 0.01 deg / 30 min / GHz / 0C 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

22 EVLA Advisor Committee
Things to Do Phase stability testing of LO System Test two systems in one antenna through fiber Test all modules in environmental chambers Have been limited by time and available hardware Detailed analysis of LO round trip phase in fiber Previous data dominated by equipment error Redesigned RTP measurement system now ready Detailed analysis on effect of DC/DC converters So far not an issue but needs closer examination 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

23 EVLA Advisor Committee
Things to Do Gain stability testing of IF system Currently having a possible issue with this Test all modules in environmental chambers Have been limited by time and available hardware Improve repeatability in modules Some modules still must be calibrated and installed as matched sets – would like to avoid this Detailed analysis of ground system noise Seems to be issues in both antennas and building 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

24 EVLA Antenna IF Diagram
Q 8-18GHz Ka K Ku X 8-12GHz 4-8GHz 2-4GHz 1-2GHz 327MHz 74MHz C S L 4&P 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

25 EVLA Antenna IF Diagram
Q 8-18GHz 8-12GHz T303 UX Converter Ka K Ku X 8-12GHz 4-8GHz 2-4GHz 1-2GHz 327MHz 74MHz C T302 LSC Converter S L 4&P T301 4P Converter 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

26 EVLA Antenna IF Diagram
Q 8-18GHz 8-12GHz T303 UX Converter Band Switch Ka K Ku X 8-12GHz C 4-8GHz T302 LSC Converter S 2-4GHz L 1-2GHz 4&P 327MHz 74MHz T301 4P Converter 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

27 EVLA Antenna IF Diagram
Q 8-18GHz 8-12GHz T303 UX Converter Band Switch T304 Down- converter 2-4GHz 1-2GHz Ka K T304 Down- converter 2-4GHz 1-2GHz Ku X 8-12GHz T304 Down- converter 2-4GHz 1-2GHz C 4-8GHz T302 LSC Converter S 2-4GHz L T304 Down- converter 2-4GHz 1-2GHz 1-2GHz 4&P 327MHz 74MHz T301 4P Converter 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

28 EVLA Antenna IF Diagram
Q 8-18GHz 8-12GHz Fiber T303 UX Converter Band Switch T304 Down- converter 2-4GHz 1-2GHz D301 Digitizer DTS Ka K T304 Down- converter 2-4GHz 1-2GHz D302 Digitizer DTS Ku X 8-12GHz T304 Down- converter 2-4GHz 1-2GHz D303 Digitizer DTS C 4-8GHz T302 LSC Converter S 2-4GHz L T304 Down- converter 2-4GHz 1-2GHz D304 Digitizer DTS 1-2GHz 4&P 327MHz 74MHz T301 4P Converter 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

29 EVLA Antenna IF Diagram
Q 8-18GHz 8-12GHz Fiber T303 UX Converter Band Switch T304 Down- converter 2-4GHz 1-2GHz D301 Digitizer DTS WDM Mux Ka K T304 Down- converter 2-4GHz 1-2GHz D302 Digitizer DTS Ku X Fiber to Control Building 8-12GHz T304 Down- converter 2-4GHz 1-2GHz D303 Digitizer DTS C 4-8GHz T302 LSC Converter S 2-4GHz L T304 Down- converter 2-4GHz 1-2GHz D304 Digitizer DTS 1-2GHz 4&P 327MHz 74MHz T301 4P Converter 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

30 EVLA Control Building IF Diagram
Fiber WDM DeMux Fiber from Antenna 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

31 EVLA Control Building IF Diagram
Fiber WIDAR Correlator WDM DeMux DTS Receiver FIR/DAC DTS Receiver FIR/DAC Fiber from Antenna DTS Receiver FIR/DAC DTS Receiver FIR/DAC 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

32 EVLA Control Building IF Diagram
Fiber VLA EVLA Transition Mode WIDAR Correlator 0-50MHz WDM DeMux DTS Receiver FIR/DAC VLA T4 & T5 DTS Receiver FIR/DAC Fiber from Antenna VLA T4 & T5 DTS Receiver FIR/DAC VLA T4 & T5 DTS Receiver FIR/DAC VLA T4 & T5 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

33 EVLA Control Building IF Diagram
Fiber VLA EVLA Transition Mode WIDAR Correlator 0-50MHz WDM DeMux DTS Receiver FIR/DAC VLA T4 & T5 VLA Sampler VLA Correlator DTS Receiver FIR/DAC Fiber from Antenna VLA T4 & T5 VLA Sampler DTS Receiver FIR/DAC VLA T4 & T5 VLA Sampler DTS Receiver FIR/DAC VLA T4 & T5 VLA Sampler 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

34 EVLA Control Building LO Diagram
VLA IAT Clock (Transition) 0.1Hz 5MHz to VLA Sigma Tau Maser 5MHz VLBI Timing Source (GPS, etc..) 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

35 EVLA Control Building LO Diagram
VLA IAT Clock (Transition) L350 Central Reference Generator 128MHz to WIDAR Timing to WIDAR 0.1Hz 19.2Hz to MIB’s 5MHz to VLA Sigma Tau Maser 5MHz VLBI Timing Source (GPS, etc..) 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

36 EVLA Control Building LO Diagram
LO Master Rack VLA IAT Clock (Transition) L350 Central Reference Generator 128MHz to WIDAR Timing to WIDAR 0.1Hz 19.2Hz to MIB’s L354 Distributor 512MHz 512MHz (3 Copies) 5MHz to VLA Sigma Tau Maser 5MHz 512MHz L351 Offset Generator Hz (3 Copies) 128Hz SYNC (3-copies) VLBI Timing Source (GPS, etc..) 128Hz (3-copies) 5.12MHz (3-copies) 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

37 EVLA Control Building LO Diagram
LO Master Rack Antenna LO/RTP Racks (3 Racks – 1 Shown) VLA IAT Clock (Transition) L350 Central Reference Generator 128MHz to WIDAR Timing to WIDAR 0.1Hz 19.2Hz to MIB’s LO Fiber To Antenna L354 Distributor L353 LO Xmit RTP Recv 512MHz 512MHz (3 Copies) RTP Fiber From Antenna 5MHz to VLA SYNC 512MHz RTP Sigma Tau Maser L352 RTP Measure 5MHz 512MHz L351 Offset Generator Hz (3 Copies) 128Hz SYNC (3-copies) 128Hz L355 Timing Distributor VLBI Timing Source (GPS, etc..) 128Hz (3-copies) 5.12MHz (3-copies) 5.12MHz 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

38 EVLA Antenna LO Diagram
LO Fiber From Building L304 LO Receiver 512MHz +SYNC RTP Fiber To Building 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

39 EVLA Antenna LO Diagram
9.6Hz to FE Rack L305 Antenna Reference Generator 19.2Hz to FE Rack & ACU LO Fiber From Building Timing 128MHz 2048MHz To D301-4 4096MHz 19.2Hz to MIB’s L304 LO Receiver 4096MHz to T304 512MHz +SYNC 1024MHz to T301 RTP Fiber To Building 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

40 EVLA Antenna LO Diagram
9.6Hz to FE Rack L305 Antenna Reference Generator 19.2Hz to FE Rack & ACU LO Fiber From Building Timing 128MHz 2048MHz To D301-4 LO to Q-Band FE LO to Ka-Band FE LO to K-Band FE LO to Ku-Band FE 4096MHz LO to T302 LO to T302 LO to T303 19.2Hz to MIB’s L304 LO Receiver 4096MHz to T304 512MHz +SYNC 1024MHz to T301 LO Band Switch LO Band Switch LO to T304’s RTP Fiber To Building 512MHz L302 GHz Synthesizer (4 Copies) L301 12-20GHz Synthesizer L301 12-20GHz Synthesizer 19.2Hz 128MHz 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

41 EVLA Advisor Committee
Questions? 11/9/2018 Jim Jackson EVLA Advisor Committee 14-15 December 2004

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