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Development of a New VLBI Sampler Unit (K5/VSSP32) Equipped with a USB 2.0 Interface

IVS2006GM@Concepción 2006.1.10. Development of a New VLBI Sampler Unit (K5/VSSP32) Equipped with a USB 2.0 Interface. Tetsuro KONDO, Yasuhiro KOYAMA, Hiroshi TAKEUCHI, and Moritaka KIMURA Kashima Space Research Center/NICT. History of VLBI Recorders at NICT.

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Development of a New VLBI Sampler Unit (K5/VSSP32) Equipped with a USB 2.0 Interface

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  1. IVS2006GM@Concepción 2006.1.10 Development of a New VLBI Sampler Unit (K5/VSSP32) Equipped with a USB 2.0 Interface Tetsuro KONDO, Yasuhiro KOYAMA, Hiroshi TAKEUCHI, and Moritaka KIMURA Kashima Space Research Center/NICT

  2. History of VLBI Recorders at NICT

  3. History of VLBI Recorders at NICT K3 GBR VDR K5/VSI 1000 K5/VSSP32 100 Data Rate (Mbps) K1 10 IP-VLBI (K5/VSSP Ver0) K4 KSP K5/VSSP Magnetic Tape Hard Disk 1 2000 1980 1990 Year

  4. K5/VSSP32at a glance

  5. FPGA ALTERA EP2S30 CONFIG DEVICE ALTERA EPC16QC100 A/D AD9283 BRS-80 1PPS CH4 CH3 CH2 REF CH1 USB I/F ANALOG BUFFER AMP AD8061 DDR MEMORY K5/VSSP32 Unit

  6. K5/VSSP32 16 CH Module 2U FRONT VIEW REAR VIEW

  7. Comparison of Specifications

  8. Comparison of Specifications

  9. System Photos

  10. K5/VSSP (IP-VLBI) System (16ch System) UNIT PCI Bus Board Specifications/Unit Max Sampling Freq. 16 MHz # of CH 1, 4 AD bit# 1, 2, 4, 8 Max Data Rate 64 Mbps 4 units for 16ch geodetic VLBI

  11. K5/VSSP32 System (16ch System) 16 CH MODULE FRONT REAR UNIT USB Interface Specifications/Unit Max Sampling Freq. 64 MHz # of CH 1, 4 AD bit# 1, 2, 4, 8 Max Data Rate 256 Mbps 4 units for 16ch geodetic VLBI

  12. Notebook VLBI

  13. VLBI with a Laptop PC or Notebook PC video signals USB2.0 USB interface allows us to use a notebook PC!!

  14. f f Can use besides VLBI • general purpose precise recorder • video converter (RF upto 300 MHz) sampling frequency

  15. Fringe Test

  16. 34m site 16MHz LPF 16MHz LPF CH 1 USB2.0 VIDEO CONVERTER VIDEO CONVERTER 2 K5/VSSP32 K5/VSSP32 3 4 H-maser 10MHz 1PPS 10MHz 1PPS CH 1 USB2.0 2 3 4 11m site 149m

  17. Notebook PC K5/VSSP32 unit USB2.0

  18. First Notebook PC Fringes in the World

  19. First fringe observed by notebook PC 3C84 Fsample = 32MHz these are due to 5MHz step PCAL signals 2005/11/10 07:24:00UT

  20. Other Fringes Fs=32MHz Fs=64MHz Fs=64MHz Fs=32MHz Fs=32MHz

  21. Summary

  22. Summary We have developed the K5/VSSP32 sampler system equipped with a USB-2.0 interface for VLBI observation, which is a successor to the K5/VSSP system. Maximum data rate is increased up to 256Mbps per unit (1024Mbps per module). Notebook PC can be a host PC. K5/VSSP32 can be used for not only a VLBI observation but also a general purpose geopysical observation which requires precise time labeling.

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