[Okutomi]
Satellite box replacement
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I replaced the satellite boxes for PR2 IM OSEMs to modified ones.
- See also: klog #8912
- The old ones have been returned to AEL staffs.
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Serial numbers of the related satellite boxes Old New IM1 (V1, V2, V3, H1) S1604896 S1604902 IM2 (H2, H3) S1604898 S1604890 -
At this time, I initially replaced the IM1 satellite box to S1807633 but the ch1 seems not working.
- I localized the cause of this problem to this satellite box by swapping the cables with one in another channel.
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I measured the spectra of the IM OSEMs with both the old and new satellite boxes.
- All the channels of the new satellite boxes look working without any malfunction.
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The OSEMs with the new satellite box showed smaller noise levels rather at all frequencies (not only higher frequencies).
- I have no idea why such improvement can happen with just an additional capacitor.
- The amplification at the DC shows transient behavior after the cable connection.
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Update of the wiki information about the PR racks
- I updated the most part of the wiki information about the PR racks.
BO implementation for remote switching of the stepper motor drivers
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Beside the wiki updating, I checked the current setup of the BO card and its downstreams.
- I found the BIO-BNC converter is already mounted on the rack, but they need to be cared about the short between the BNC shield and Dsub37 shell by putting jumper sleeves.
- The cables to connect the BIO-BNC converter with the stepper motor driver are already installed.
- I added a BO card on the I/O chassis in the PRM rack.
Next steps
- Check of the BO functionality with short-cared BIO-BNC converters
- Position adjustment of the horizonrtal OSEMs on the PR2 IM with the traversers