The position should be the same,-> Yes, in the back panel function->; Signal processing->; Filter; Backplane function->; Signal processing->; Signal generation->; Sine wave, you should pay attention. The first filter in LV is not called low-pass filter, but seems to be XX filter. XX is an English name. I forgot the specific name. You can find it according to the icon. This VI can be changed into low-pass, band-pass and high-pass filters according to your parameter settings.