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Wed Jan 29 14:49:48 2020, anchal, DailyProgress, BEAT, Beanote Spectrum vs FSS Gain Values
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Wed Jan 29 15:58:26 2020, anchal, DailyProgress, BEAT, Beanote Spectrum vs FSS Gain Values
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Fri Feb 7 09:57:32 2020, anchal, DailyProgress, BEAT, Spanned gain parameter space in NFSS and checked beatnote
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Fri Feb 7 18:12:03 2020, anchal, DailyProgress, BEAT, Spanned gain parameter space in SFSS and checked beatnote
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Mon Feb 10 11:07:33 2020, anchal, DailyProgress, BEAT, Spanned gain parameter space in PMCs and checked beatnote
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Thu Feb 13 15:27:18 2020, anchal, DailyProgress, BEAT, Further iterated back and forth to optimized FSS Gains.
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Message ID: 2531
Entry time: Thu Feb 13 15:27:18 2020
In reply to: 2526
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Author: |
anchal |
Type: |
DailyProgress |
Category: |
BEAT |
Subject: |
Further iterated back and forth to optimized FSS Gains. |
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I took beatnote measurements and spanned gain values in the PMC to see if stability issues in PMC loops can be affecting the FSS downstream.
Method
- I used BNspec.py with default settings (10 kHz bandwidth at 15.625 kSa/s for 60s) while spanning the parameter space of PMC gains.
- The beatnote frequency was robustly within 2 kHz of 27.34 MHz during this whole measurement.
- The overall experiment was run by spanParamSpace.py script.
- First I spanned North gains using the last optimum values found for South Side and tried to span the area towards which we found minima earlier.
- Next, I used the new minima found for North side and spanned region in South side.
- This time, I used sum of the ASD of beatnote frequency between 300 to 600 Hz to determine improvement in noise overall.
- Still, I would say, the improvement is hardly more than 5% over large areas of parameter space, meaning mostly BN noise is independent of these gains.
Final result
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North |
South |
COM Gain (dB) |
12 |
22 |
FAST Gain (dB) |
10 |
17 |
Data
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