QuantAsylum QA451 User’s Manual
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Appendix III: Interfacing with Other Applications
QA 401 Application: QAAnalyzer.exe
The QA401 application isn’t generally aware if the QA451 hardware is being used or not. There are a few
places you will want to adjust the settings to ensure accurate values are being shown in the QA401
application.
Because the QA451 has 12 dB of attenuation built-in, you will want to specify that in the Input Gain
option on the QA401. This is how you tell the QA401 application that the value it is measuring is less
than the actual value and thus the reported peaks and noise, for example, must be increased by 12 dB
when being displayed.
Next, notice above there is an option to specify load impedance. If you want to display in watts, then
you need to set this figure to the value you have set on the QA451.
Tractor
Tractor treats the QA450 and the QA451 as the same hardware. When you specify “Pre
-analyzer Input
Gain” in Tractor (example below), you will want t
o specify -12 dB if you are using the QA451, and -6 dB if
you are using the QA450.
