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40m Log |
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Tue Sep 29 12:47:08 2009, Koji, Update, MZ, MZ unlocked
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Tue Sep 29 18:21:41 2009, Koji, Update, MZ, MZ work done
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Tue Sep 29 21:37:09 2009, rana, Update, MZ, MZ work done : some noise checking
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Tue Sep 29 21:51:32 2009, Koji, Update, MZ, MZ work done : some noise checking
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Tue Sep 29 22:51:20 2009, Koji, Update, MZ, Possible gain mis-calibration at other places (Re: MZ work done)
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Message ID: 2023
Entry time: Tue Sep 29 22:51:20 2009
In reply to: 2020
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Author: |
Koji |
Type: |
Update |
Category: |
MZ |
Subject: |
Possible gain mis-calibration at other places (Re: MZ work done) |
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Probably there is the same mistake for the PMC gain slider. Possibly on the FSS slider, too???
Quote: |
2) The EPICS setting for the MZ gain slider was totaly wrong.
Today I learned from the circuit, the full scale of the gain slider C1:PSL-MZ_GAIN gave us +/-10V at the DAC.
This yield +/-1V to V_ctrl of the AD602 after the internal 1/10 attenuation stage.
This +/-1V didn't correspond to -10dB~+30dB, but does -22dB~+42dB and is beyond the spec of the chip.
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