1 / 23

Shanghai VLBI Terminal and Mark 5A Summary

Shanghai VLBI Terminal and Mark 5A Summary. Wei Wenren 2003 ， 11. 一、 Shanghai VLBA4,S2 System. S2 FORM. Video recorde(8). Video tape. S2 Terminal. VLBA FORM. IFD. BBC(14). Sampler. Tape Recorder. IF. tape. VLBA Rack. MK4 FORM. 1pps/ 5MHz. Shanghai VLBI Termianl.

mele
Download Presentation

Shanghai VLBI Terminal and Mark 5A Summary

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Shanghai VLBI Terminal and Mark 5A Summary Wei Wenren 2003，11

  2. 一、Shanghai VLBA4,S2 System S2 FORM Video recorde(8) Video tape S2 Terminal VLBA FORM IFD BBC(14) Sampler Tape Recorder IF tape VLBA Rack MK4 FORM. 1pps/ 5MHz

  3. Shanghai VLBI Termianl

  4. 二、MK System’s History

  5. 三、MK5 VLBI data record/playback System • Disk based VLBI system， replace MK4/VLBA4 tape recorder; • MIT Haystack Observatory; • Based on PC platform

  6. Mark 5demonstration system

  7. Mark 5A system

  8. Tape System vs Disk System

  9. Disk/Tape Price Comparision

  10. In the picture: year: 2002 2003 2004-2005 price(/G )： disk: ~$1.25 ~$1.0 fall(~$0.5) tape: ~$2.0 same same capability/per: disk: ~200GB ~300GB 500-1000GB tape： ~500GB same same weight： disk: 0.9kg/per disk: 7.0kg/per Record time： disk: 16 disks(700GB), 1Gb/s for 24hours, total capability equal to 22 MK4/BLBA4 tapes

  11. 四、Mark 5ASystem Summary 4.1 MK5A system diagram I/O Board VLBI data VLBI data FDFP bus Input Sec. Output PCI bus Disk Inter. Disk bankA Disk bankB

  12. 4.2 Mark 5A System feature • VLBI data port——32 bit FPDP bus formatter，correlator，VSI； • I/O board ---- data form translate Mark4/VLBA data FPDP bus form； • 100% disk utilization fan in/out：8,16,32,or 64 tracks 32 strip parity bit； • data integrity and continuityrecording: if slow or fails, dynamically adjusted, no data lost playback: if fails or missing, fill a preset data pattern

  13. Disc Array VLBI Data Port/ 64-bit/66MHz FPDP bus PCI Bus three physical interfaces • Data Port/FPDP: a 32-bit two-way port 32-bits of the FPDP bus are active • Disk array: 16 standard IDE disks two ‘8-pack’ modules 4 master/slave pairs each. • PCI bus: supports a 64-bit/66MHz bus compatible with 32-bit/33MHz bus

  14. MK4/VLBA data FPDP input output FPDP output input MK4/VLBA data disk FPDP output disk 4.3 Operating modes 1、Idle -- ‘bypass’ ; increase overall data capacity 2、Record – ‘Record/Bypass’ 3、Playback – played back to FPDP bus，to the Output Section playback rate is controlled by the Output Section

  15. 4.4 Data Modes • 1、tvg • test-vector generator • VSI test pattern data

  16. 2、st • straight-through • Mark 4 data

  17. 3、mark4——no parity bit; MK4 data A, ‘mark4:8’ —— 8 tacks， g0 （1:4）B, ‘mark4:16’ —— 16 tacks, g0, g2 (1:2) C，‘mark4:32’—— 32 tacks (1:1) D，’mark4:64’—— 64 tacks (2:1)

  18. 4、vlba——no parity bit; VLBA data A，’vlba4:8’ —— 8 tracks, g0 B，’vlba4:16’ —— 16 tacks, g0, g2 C，’vlba4:32’ —— 32 tracks D，’vlba4;64’ —— 64 tracks

  19. 4.5 Mark 5 Data Transfer Modes Internal Mark 5 to file transfer

  20. network Mark 5 to Mark 5 transfer through network

  21. network net2disk file2net net2out file2net correlator file transfer through network between Mark 5 and other machine

  22. 五、MK 5B • new I/O board • include formatter • full compatible with VSI-H and VSI-S • input: 1, 2, 4, 8, 16 or 32 tracks • ~2004,6

  23. Thanks!

More Related