-- RunaBriguglio - 20 Jun 2011

System started and shell set (without miniskirt)

test_noise: the noisy act #560 has still a 8nm RMS noise

  • 20110620_092536_noise.jpg:
    20110620_092536_noise.jpg
Slewed: test noise @ 80 deg c.a.

  • 20110620_105430_noise.jpg:
    20110620_105430_noise.jpg
Slewing around position @80 deg ca

  • 20110620_111044_noise.jpg:
    20110620_111044_noise.jpg
Noise Spectrum while shaking and noise. first analisys.

  • spectrum2.png:
    spectrum2.png

  • Screenshot-1.png:
    Screenshot-1.png
Disable current on #511 and #34 and #560. Restarting. Noise : no changes. #511-> board related of act related confirmed

  • 20110620_132232_noise.jpg:
    20110620_132232_noise.jpg
Runa's shake with no effect. Try to slew. Found noise different place. (crate 2?) Disable current on #314 and #318 Found noise on slewing centered on #318

DSP Board replacement

Crate= 4 Board= 7 SN 110 replaced with SN 332 (it was the DSP board showing a large noise in the picture above, bottom-right portion of the image)

Even worst.....

  • 20110620_160424_noise.jpg:
    20110620_160424_noise.jpg

Shell dismount: plan to fix acts: DSP[511,560,34,318], MIR([412,581,515,123])
I Attachment Action Size Date Who Comment
20110620_092536_noise.jpgjpg 20110620_092536_noise.jpg manage 371 K 20 Jun 2011 - 09:06 RunaBriguglio  
20110620_105430_noise.jpgjpg 20110620_105430_noise.jpg manage 456 K 20 Jun 2011 - 09:06 RunaBriguglio  
20110620_111044_noise.jpgjpg 20110620_111044_noise.jpg manage 453 K 20 Jun 2011 - 09:15 RunaBriguglio  
20110620_132232_noise.jpgjpg 20110620_132232_noise.jpg manage 464 K 20 Jun 2011 - 11:32 RunaBriguglio  
20110620_160424_noise.jpgjpg 20110620_160424_noise.jpg manage 459 K 20 Jun 2011 - 14:16 RunaBriguglio  
Screenshot-1.pngpng Screenshot-1.png manage 22 K 20 Jun 2011 - 10:02 RunaBriguglio  
spectrum2.pngpng spectrum2.png manage 145 K 20 Jun 2011 - 10:16 RunaBriguglio  
Topic revision: r3 - 20 Jun 2011, RunaBriguglio
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