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Wed Jan 20 18:07:09 2021, Anchal, Summary, BHD, HAM-A Coil Driver measurements before modifications 7x
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Mon Jan 25 18:18:04 2021, Anchal, Summary, BHD, Satellite Amplifier Transfer Functions and noise 
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Wed Feb 3 16:27:19 2021, Anchal, Summary, BHD, Satellite Amplifier Transfer Functions and noise After modifications    
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Wed Feb 10 11:45:59 2021, Anchal, Summary, BHD, Satellite Amplifier Very Low frequency noise After modifications 6x
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Wed Feb 10 15:07:50 2021, Anchal, Summary, BHD, Satellite Amplifier Output Offset measurements
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Wed Feb 10 15:25:45 2021, gautam, Summary, BHD, Satellite Amplifier Output Offset measurements
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Wed Feb 10 17:18:03 2021, Koji, Summary, BHD, Satellite Amplifier Output Offset measurements
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Thu Feb 11 11:10:05 2021, Anchal, Summary, BHD, Satellite Amplifier Very Low frequency noise After modifications   
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Thu Feb 11 16:58:52 2021, rana, Summary, BHD, Satellite Amplifier Very Low frequency noise After modifications
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Thu Jan 28 12:53:14 2021, Anchal, Summary, BHD, HAM-A Coil Driver measurements before modifications    
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Thu Jan 28 18:04:55 2021, Anchal, Summary, BHD, HAM-A Coil Driver measurements After modifications 
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Thu Jan 28 21:44:45 2021, gautam, Summary, BHD, HAM-A Coil Driver measurements After modifications
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Fri Jan 29 15:39:30 2021, Anchal, Summary, BHD, HAM-A Coil Driver measurements After modifications TF and Noise S2100027    
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Tue Feb 2 11:57:46 2021, Anchal, Summary, BHD, HAM-A Coil Driver measurements After modifications TF and Noise S2100028    
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Message ID: 15797
Entry time: Wed Feb 10 11:45:59 2021
In reply to: 15793
Reply to this: 15799
15803
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Author: |
Anchal |
Type: |
Summary |
Category: |
BHD |
Subject: |
Satellite Amplifier Very Low frequency noise After modifications |
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As suggested, I wrapped the satellite amplifier box D10028128 S2100029 in blanket and foam and took very low frequency spectrum starting from 32 mHz to 3 Hz. The results are attached along with stiched high frequency measurements from 40m/15793.
Very Low Frequency Spectrum Measurement
- D1002818 S2100029 box was powered and covered in a foam blanket.
- Additionally, it was covered from all sides with foam to reduce wind and temperature effects on it.
- The rear panel DB25 connector was connected to a breakout board where pins od PDA input and GND were shorted, shorting the transimpedance circuit input.
- The output was read from PDMon DB9 output at front panel which was converted to 4 BNC channels using breakout board.
- Two channel noise was measured at once using D1002818_SP.yml parameter file.
- Instrument noise at all the used input ranges were measured separately by shorting the input of the BNC cables.
Edit Wed Feb 10 15:14:13 2021 :
THIS MEASUREMENT WAS WRONG. SEE 40m/15799. |
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