Sine wave gen starting and stopping

QA40x
1

Hello there,

I am using QA402 and outputitng a standard sine wave. I am unsure why the signal starts and stops and starts continuously. It is like measuring a beeping tone.

I was trying to uplaod an image but the system throws an error. Essentially from the time domain plot, you can see the start is “gradual”, and the ending part is also like fading down. Then a new cycle starts.

2

Hi, this is all correct when you use the QA40x to acquire a signal and then do the FFT. If you want to use only the DAC to generate the signal (Gen) without using the ADC to acquire it, you need to press the “IDLE” button: then you will see that the signal is in continuous mode.

3

Thanks for the quick reply. All clear now.