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Entry  Tue Nov 8 17:48:21 2011, Mirko, Update, CDS, Dolphin weirdness Dolphn_TF.png
    Reply  Thu Nov 10 11:52:00 2011, Jenne, Update, CDS, RFM signal transferring OAF_rfm_signals_MCL.pdfOAF_rfm_signals_MICH.pdfOAF_rfm_signals_PRCL.pdfOAF_rfm_signals_GUR1X.pdf
Message ID: 5861     Entry time: Thu Nov 10 11:52:00 2011     In reply to: 5841
Author: Jenne 
Type: Update 
Category: CDS 
Subject: RFM signal transferring 

I am not so happy with the control signals that are coming into the OAF via the RFM/Dolphin/shmem. 

The MCL/MCF signal travels via RFM from the IOO computer to the RFM model on the SUS computer, and then via dolphin to the OAF model on the LSC computer.

The MICH and PRCL signals travel via shmem from the LSC model to the OAF model, all on the LSC computer.  They don't go through the RFM model.

The seismometer channels travel via shmem between the PEM model on the SUS computer and the RFM model on the SUS computer, and then via dolphin between the SUS computer and the OAF model on the LSC computer.

Each pdf shows the power spectrum and a time series of the signals in their "original" model, and in the OAF model.  The seismometer is the only one that seems fine.  The time series match, except for a delay which is not surprising, since the signals have to travel.  The other signals seem pretty distorted.  What is going on??? Why can we trust some, but not all, of the signals that move between models and between computers???

 (This data was all taken while the MC was locked, but MICH and PRCL were not.  I don't think this should have any effect on the signal transfer though).

The MCL isn't soooo bad, so maybe we can keep moving forward with it, but I'm concerned that we're not really going to be successful OAF-ing the other degrees of freedom if the signals are so distorted.

Attachment 1: OAF_rfm_signals_MCL.pdf  61 kB  | Hide | Hide all
Attachment 2: OAF_rfm_signals_MICH.pdf  62 kB  | Hide | Hide all
Attachment 3: OAF_rfm_signals_PRCL.pdf  63 kB  | Hide | Hide all
Attachment 4: OAF_rfm_signals_GUR1X.pdf  62 kB  | Hide | Hide all
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