Comments (5)
Hi @NoiseFree, can you verify if on your plot that the RMS is reported correctly regardless of window setting? Yes, I see the shift in trace as you do
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RMS value stays the same regardless of window setting
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This has been fixed for release 1.174 out later today. In this release, you can verify for RECT or other windows (HANN, FlatTop, etc) the displayed Y value of measured noise remains the same when RTHZ is enabled via the DBV context menu. Please confirm at your convenience, and thanks very much for reporting this.
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Link is here: https://github.com/QuantAsylum/QA40x/releases/tag/1.175.
Please re-open if you see an issue.
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Thanks for the fix! I can confirm that the measurement is not window dependent anymore.
But there is still an issue with the display. It seems that it's off by about 1 dB.
To proofe that I measured the spectral density of an 1MOhm resistor at room temperature. The circuit is the same non-inverting amp as shown above with the 50 Ohms removed.
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Related Issues (20)
- Polarity Measurement
- Add ability to specify two weightings at once HOT 1
- Add date/time to the image HOT 1
- Where could I get the QA40x device?
- Add Mic Compare Plugin to QA40x
- Add ability to alert on changes to measured power levels
- Noise density graph seems to be slightly offset HOT 2
- Multi-trace export in Graph Tool
- Add ability to specify log interpolation on weightings file HOT 1
- Add ability to offset traces in Graph via Math menu
- Unify REST file specifications
- Access Serial Number and Temperature via REST
- Access Graph Tool without Device Connected
- Have mirroring follow mute settings of on-board QA40x DAC
- Watts measurement option on Dbv context menu? HOT 1
- fft size for calibration verification in wiki HOT 1
- Add D (Distortion only) measurement tile
- Bandwidth measurement tile
- Shortcut keys for multitone, white noise, FR
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