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Entry  Wed Aug 24 14:11:09 2016, Praful, Update, Electronics, Microphone Testing white_v_ambient.pngwhite_v_ambient.pdfwhite_v_ambient.pdf
    Reply  Fri Jan 20 17:12:37 2017, Steve, Update, PEM, EM172 mic is hooked up in the PSL EM172c.jpg
       Reply  Thu Feb 2 17:34:25 2017, rana, Update, PEM, EM172 mic is hooked up in the PSL MicFail.pdf
          Reply  Thu Feb 2 17:43:20 2017, gautam, Update, PEM, EM172 mic is hooked up in the PSL Mic_broken.png
Message ID: 12789     Entry time: Thu Feb 2 17:34:25 2017     In reply to: 12744     Reply to this: 12790
Author: rana 
Type: Update 
Category: PEM 
Subject: EM172 mic is hooked up in the PSL 

I don't know if anyone looked at the time series (not trend) or spectrum of the Microphone after installation, but it looks bad and featureless to me. Is the Microphone broken?

This shows the spectrum from early this morning and again from tonight. You can see that it is bi-stable in its noise properties. This thing is busted; we're now removing it from the PSL so that it doesn' light it self on fire.


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