Page History

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2:45pm
Connected HV to the patch panel and mapped out the GUI to physical hybrid channel. This mapping was added to the DAQ & Power Mapping in Group C page. I will update the HV GUI with a physical hybrid ID (layer, hybrid channel instead of the existing mapping).

1/17/2015

1:00 pm - 5:00 pm

With all FEB's mounted on the support plate, the FEB's were powered up individually with the high speed cables connected.  All FEB's seem to power up fine, however, the DVDD current on FEB 5t and FEB 6t seem to indicate that there was no control link present.  These two FEB's were connected to the top two channels (0,1) of the 4th flange board using cable #10 and #11 respectively.  In order to check whether the problem was due to the FEB's or the cable/flange, a working flange board channel (flange board 3, channel 2, cable #6) was connected to FEB 5t and it was powered up again.  This time, a control link was established so the problem seems to be with either the cable or the flange board.  The same procedure was used to test FEB 6t and the results were the same, however, a different flange board and channel were used (see below).

Once a control link was established with all FEB's, they were tested to determine if they could sync all APV's connected to them.  This was done by using a stack of 4 L1-L3 hybrids connected to a single crossover board which in turn was connected to a single FEB.  The same stack of hybrids was cycled through all FEB's and only the FEB being tested was powered on.  As shown on the table below, only 5/10 FEB's were found to sync all 20 APV's.

The clock phases were not adjusted on those FEB's which couldn't sync all 20 APV's, so it's unclear if this would resolve the issue.

Equipment

Interlock board

see Group C interlock board for instructions on monitoring and controls.

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