[Halld-pid] [New Comment] Follow-up Re: Follow-up Re: Follow-up Re: CSS TOF Discriminator Display frozen

[dalton at jlab.org]

Comments:
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 - by dalton on Thu, 04/30/2015 - 10:04.

One channel in TOF crate reporting  - According to Sergey's system, there is a single channel in the TOF dicriminator crate that is reporting a scaler rate of about 150 Hz, while all other channels are reporting no counts.  This is channel 0 in slot 15.  This slot is not in the traslation table, it must be a new addition.

 - by somov on Thu, 04/30/2015 - 02:19.

Problem with DSC scalers - The problem seems to be with the DMA readout of discriminator scalers in the TOF crate by a scaler monitoring program. We don't read out DSC crates within DAQ.
Very likely, there is a problem with a DSC module (s) in this crate. Discriminators for other sub-detectors look Ok - they are initialized exactly in the same way. 
One has to check TDC hits in the TOF, I think that they should be Ok (except may be for the bad module, if any).

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Logentry Text:
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The problem came back.   The TOF scalers are reading back all zeros.    There is some problem with the DAQ configurations.  A. Somov compared the configuration to that of other working scalers and they are similar.  One suggestion is that there could be a firmware issue with the TOF disc. boards.   We need to track this down.  

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