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Entry  Thu Sep 9 00:22:14 2010, Dmass, Electronics, stuff happens, Newport 3040 fukt? 
    Reply  Thu Sep 9 05:17:19 2010, Dmass, Electronics, stuff happens, Who cares! 
       Reply  Thu Sep 9 18:31:48 2010, Dmass, Electronics, stuff happens, Who cares! 
          Reply  Thu Sep 9 21:12:50 2010, Dmass, Electronics, stuff happens, Router Crashed again? 
             Reply  Thu Sep 9 21:45:26 2010, Dmass, Electronics, stuff happens, Router Crashed again? 
                Reply  Thu Sep 9 21:56:29 2010, Dmass, Electronics, stuff happens, Can't get data from 40m network? 
                Reply  Thu Sep 9 21:57:37 2010, Frank, Electronics, stuff happens, Router Crashed again? 
                   Reply  Thu Sep 9 22:38:06 2010, Zach, Electronics, stuff happens, Router Crashed again? 
          Reply  Fri Sep 10 01:03:21 2010, Dmass, Electronics, stuff happens, Who cares! 
             Reply  Fri Sep 10 01:24:41 2010, Dmass, Electronics, stuff happens, SR560 needed 
             Reply  Fri Sep 10 16:32:32 2010, Dmass, Electronics, stuff happens, Who cares! 
                Reply  Mon Sep 13 21:34:47 2010, Dmass, Electronics, Doubling, Final Spectra: HEPA Test MZPhaseNoiseHEPASpectest.pngOvenHEPATempSpec.png
Message ID: 1051     Entry time: Mon Sep 13 21:34:47 2010     In reply to: 1043
Author: Dmass 
Type: Electronics 
Category: Doubling 
Subject: Final Spectra: HEPA Test 

I repeated the HEPA on/off test on the "low" setting several times. Here are the results.

First plot is phase noise.

Second plot is temperature noise (read with an NTC 833 atttached to each oven, AC coupled into the DAQ with an SR560).

High frequency noise seems consistently higher with HEPA on. Low frequency noise seems a tiny bit lower (factor of 2) with the HEPA on, though I don't think this really matters insofar as drawing conclusions about what the sources of noise are for us at low frequency.

Attachment 1: MZPhaseNoiseHEPASpectest.png  289 kB  | Hide | Hide all
MZPhaseNoiseHEPASpectest.png
Attachment 2: OvenHEPATempSpec.png  315 kB  | Hide | Hide all
OvenHEPATempSpec.png
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