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QA403 user manual
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1
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72
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February 5, 2026
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Weighting for wow and flutter
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2
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188
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February 4, 2026
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Need help with geophones and qa472
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1
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43
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February 3, 2026
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RIAAA test with 403
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16
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143
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February 2, 2026
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Mirror the input to pc
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3
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186
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February 2, 2026
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What is wrong with the THD calculation with ext. Generator
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15
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121
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January 30, 2026
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Automated test AMP THD versus frequency
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3
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147
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January 30, 2026
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Has the QA403 output out-of-band residual signals?
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44
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1064
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January 29, 2026
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Is my QA403 Broken?
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3
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72
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January 29, 2026
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Measure frequency response of digital stethoscopes
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5
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220
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January 29, 2026
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BUG: sample rate and input scale
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5
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201
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January 29, 2026
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Measure power amplifier at the output?
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21
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751
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January 28, 2026
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Saved Automated Test setups not loading
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6
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154
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January 27, 2026
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Strange FFT / FFT not stable
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5
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278
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January 27, 2026
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QA403 Antialiasing?
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2
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64
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January 27, 2026
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Improvements to the software?
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88
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1694
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January 26, 2026
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An XLR cable adapter
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17
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895
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January 23, 2026
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Some bug in the spectrum display which fixes itself over time
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7
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106
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January 21, 2026
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Feature request - Group delay to AMPFrequencyResponseChrip
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0
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47
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January 17, 2026
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THD measurement lower than 127 dB
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9
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336
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January 16, 2026
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QA402 Software V0.998 Add Mesurement missing OK button
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4
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490
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January 16, 2026
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First version of custom QA40x Audio Analyser
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34
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1305
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January 15, 2026
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Considering purchase of QA403 (compare to Siglent w/Math, etc)
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11
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244
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January 15, 2026
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I2S bug QA403 after triggering PUT /Settings/Default
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6
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193
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January 12, 2026
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IDLE Feature Request
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4
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135
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January 11, 2026
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Amp Dynamics Automated Automated Test Bug?
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5
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124
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January 11, 2026
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Why your SNR reading might be wrong
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9
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184
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January 11, 2026
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USB C to B Cable
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0
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69
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January 8, 2026
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Dynamic Headroom Measurement
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2
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99
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January 6, 2026
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Power Quality Analysis with the QA403: Proof of Concept
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34
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1855
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January 3, 2026
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