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Entry  Tue Nov 17 11:09:43 2009, Koji, Configuration, SUS, ETMY suspension conencted to megatron ADC/DAC 
    Reply  Tue Nov 17 13:39:37 2009, Koji, Configuration, SUS, ETMY suspension conencted to megatron ADC/DAC 
       Reply  Tue Nov 17 15:23:06 2009, Koji, Configuration, SUS, ETMY suspension conencted to megatron ADC/DAC 
          Reply  Tue Nov 17 21:10:30 2009, Koji, Configuration, SUS, ETMY suspension conencted to megatron ADC/DAC 
             Reply  Wed Nov 18 11:27:33 2009, Koji, josephb, Configuration, SUS, ETMY suspension conencted to megatron ADC/DAC 
                Reply  Wed Nov 18 12:33:30 2009, Koji, josephb, Configuration, SUS, ETMY suspension conencted to megatron ADC/DAC Untitled.png
       Reply  Wed Nov 18 16:24:25 2009, pete, Configuration, SUS, ETMY suspension conencted to megatron ADC/DAC 
Message ID: 2281     Entry time: Tue Nov 17 13:39:37 2009     In reply to: 2280     Reply to this: 2282   2293
Author: Koji 
Type: Configuration 
Category: SUS 
Subject: ETMY suspension conencted to megatron ADC/DAC 

0) Now the connection for the ETMY suspension was restored in a usual state. It damps well.

1) I thought it would be nice to have dataviewer and DTT working.
   So far, I could not figure out how to run daqd and tpman.
   - I tried to configure
    /cvs/cds/caltech/target/fb/daqdrc
    /cvs/cds/caltech/target/fb/master
    /cvs/cds/caltech/chans/daq/C1TST.ini
(via daqconfig)

   - I also looked at
    /cvs/cds/caltech/targetgds/param/tpchn_C1.par
   but I don't understand how it works. The entries have dcuids of 13 and 14 although C1TST has dcuid of 10.
   The file is unmodified.

   I will try it later when I got a help of the experts.

2) Anyway, I went ahead. I tried to excite suspension by putting some offset.

It seems to have no DAC output. I checked the timing signal. It seems that looks wrong clock.

   I looked at DAC output by putting 5000,10000,15000,20000,25000cnt to UL/UR/LR/LL/SD coils.
   I could not find any voltage out of the DAC in any channels.

   Then, I checked the timing signal. This clock seems to have wrong frequency.
   What we are using now is a clock with +/-4V@4MHz. (Differential)
   Maybe 4194304Hz (=2^22Hz)?

   I went to 1Y3 and checked the timing signal for 16K. This was +/-4V@16kHz. (Diffrential)

   The possible solution would be
   - bring a function generator at the end and try to input a single end 4V clock.
   - stretch a cable from 1Y3 to 1Y9. (2pin lemo)

Quote:

I have connected ETMY sus electronics to megatron ADC/DAC.
We continue this state until 15:00 of today.

 

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