40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  PSL  Not logged in ELOG logo
Entry  Fri Nov 4 23:34:28 2016, awade, DailyProgress, Electronics Equipment, Trouble shooting in the north path 100_0258.JPG100_0261.JPG
    Reply  Tue Nov 8 14:01:11 2016, awade, DailyProgress, Electronics Equipment, Trouble shooting in the north path 2016-11-08_11.35.34.jpg
       Reply  Wed Nov 16 12:46:59 2016, awade, DailyProgress, Electronics Equipment, Trouble shooting in the north path and Murphy's law 
          Reply  Wed Dec 7 18:59:46 2016, awade, DailyProgress, Electronics Equipment, FSS monitor daughter board damage and Murphy's law D040424-B.pdf
             Reply  Wed Dec 7 21:14:07 2016, Koji, DailyProgress, Electronics Equipment, FSS monitor daughter board damage and Murphy's law 
                Reply  Thu Dec 8 17:37:32 2016, awade, DailyProgress, Electronics Equipment, FSS monitor daughter board fixed 
       Reply  Thu Jan 5 15:50:55 2017, awade, DailyProgress, Electronics Equipment, Trouble shooting in the north path 2017-01-05_15.17.55.jpg
Message ID: 1759     Entry time: Fri Nov 4 23:34:28 2016     Reply to this: 1764
Author: awade 
Type: DailyProgress 
Category: Electronics Equipment 
Subject: Trouble shooting in the north path 

I have been going through to optimize in the North path today. In the course of rearrangements of some electronics I turned off the power supply (Tenma 72-7245) to the north EOM 14.75 MHz amplifier to the broadband phase modulator.  The voltage settings were lost, so I though I might replace the Tenma with one of the HP power supplies.  Don't know if the Tenmas are particularly lorded for their low noise performance and the HPs are usually ok (although I haven't ever measured this).  

In the process I've broken off one of the banana plug pins on the EOM driver, a new one will need soldering on.  Also, the driver is apparently wrapped in a cardboard box. I'd say this should be replaced too.  We're definitely out of plastic jiffy boxes in the westbridge electronics lab, I might order some more of those. For my reference the dimensions of the board and its components are 50.75x30.5x18 mm.

North path locking is down until at least tomorrow while I do this small fix.

 

Attachment 1: 100_0258.JPG  584 kB  | Hide | Hide all
100_0258.JPG
Attachment 2: 100_0261.JPG  513 kB  | Hide | Hide all
100_0261.JPG
ELOG V3.1.3-