QuantAsylum QA401 Скачать руководство пользователя страница 8 | Manualshive

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Loopback Connection

Leave the L- shorting block applied and

using a BNC cable (not included) connect

the left + output to the Left + input

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Содержание QA401

Страница 1: ...QA401 Quick Start ...

Страница 2: ...Download Install the QA401 App 1 Download the QA401 Application 2 Make sure you opt to install drivers 3 After installation is complete click the icon on your desktop ...

Страница 3: ...Navigation Scrolling the Panel Depending on your window size the full control panel might not be visible If it s not click part of the panel without any control and drag up or down to expose more UI ...

Страница 4: ...the QA401 hardware with a USB cable not supplied The OS should recognize the hardware finish installing it and then you should see the application configure and connect 2 Once connected you ll see an indication in the lower left corner ...

Страница 5: ... that you can see the Run Stop button 2 Press the Run Stop button When it is illuminated you are running You should see yellow spectrum data appear 3 Disable the attenuator When you click the ATTEN button you should hear a relay click inside the QA401 ...

Страница 6: ...s or terminators You can find these for sale on Amazon or your favorite component supplier Search on bnc 75 ohm terminator The precise impedance isn t important it just needs to be less than a few hundred ohms 2 If you do not short the inputs then you ll measure the noise of the internal input resistors and the noise contribution from the inputs 100K resistors can be quite high ...

Страница 7: ...ement In the application press the PWR button This will enable the reporting of measured power in the indicated bandwidth Confirm this is around 120 dBFS If not verify you have correctly connected the input shorting blocks ...

Страница 8: ...Loopback Connection Leave the L shorting block applied and using a BNC cable not included connect the left output to the Left input ...

Страница 9: ...opback THD Measurement Hold the control key while pressing the GEN1 button This will bring up the GEN1 context menu Change the amplitude to 16 dBFS This is the sweet spot for THD measurements on the QA401 ...

Страница 10: ... or down until you see the value you desire appear in the on screen indication A small LED will light on the knob to indicate it can be dragged 2 You can also use your mouse wheel to adjust knobs Just move the mouse over the knob click and you ll see the LED light You can then use your mouse wheel to adjust the settings ...

Страница 11: ...THD Measurement With the output connected to the input this is called loopback made You should see a THD figure around 110 dBFS ...

Страница 12: ... more help Contact Support QuantAsylum com The PDF manual is available from the application Select Help Launch Help Or check in the installation directory C Program Files x86 QuantAsylum QA401 Documentation ...

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