How can I display the frequency once the trigger has locked onto a waveform?
I have been using the Xprotolab to troubleshoot a switch-mode power supply. ?I can use the trigger to capture the waveform of the power supply and measure the ripple. ?Unfortunately I can't seem to work out how to display the frequency. ?The FFT meter shows only a signal at 0 Hz, and the Frequency meter shows 0.0000 Hz. ?The power supply is connected to CH1 and outputs nominal +5 V.
Any suggestions would be greatly appreciated.
Thanks!!

Hi. You could AC couple your signal, and then you will be able to add more gain. You should be able to see the frequency content on the FFT. To AC couple with the Xprotolab, you can put a 0.1uF capacitor in series with the signal.

Thanks!
Turning up the gain to #4 fixed everything!
Now I can see that the ripple is 420 mV and the frequency is 51 kHz.
Thanks Gabriel!