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Entry  Fri Apr 15 18:59:41 2011, tara, DailyProgress, FSS, Preparing to install TTFSS 
    Reply  Tue Apr 19 22:40:03 2011, tara, DailyProgress, FSS, Preparing to install TTFSS 
       Reply  Wed Apr 20 17:54:52 2011, tara, DailyProgress, FSS, Preparing to install TTFSS 000_0025.jpg000_0024.jpg000_0023.jpgfastout.png
          Reply  Sat Apr 23 11:40:09 2011, tara, DailyProgress, FSS, Preparing to install TTFSS TTFSS_cartoon.pdf
             Reply  Sun Apr 24 22:02:07 2011, tara, DailyProgress, FSS, Preparing to install TTFSS beat_2011_04_24.pngbeat_2011_04_24.png
                Reply  Mon Apr 25 17:53:20 2011, tara, DailyProgress, FSS, Preparing to install TTFSS beat_2011_04_25.png
Message ID: 587     Entry time: Sat Apr 23 11:40:09 2011     In reply to: 585     Reply to this: 589
Author: tara 
Type: DailyProgress 
Category: FSS 
Subject: Preparing to install TTFSS 

 koji, tara

 The mystery about the distortion FASTOUT is solved. It actually works propperly.

From previous entry, the distortion in the error signal from FAST OUT is due to the low pass filter at 10 Hz just before the output.

The signal from tnc FASTOUT disappears when we plug in the lemo FASTOUT because the lemo cable we used has its polarity switched.

So it grounds the signal from TNC output as well.

 

     For an easy reference, I draw a cartoon diagram for the TTFSS circuit.

The small circles are SMA inputs,

the large circles with shadow are manual knobs,

the middle size circles are bnc outputs,

the diamonds are TNC outputs, and the half circles are bnc outputs for monitor.

TTFSS_cartoon.pdf

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