I was trying to do a simple full bridge rectification. There is a strange problem. The oscilloscope does not show the rectified waveform in the negative cycle. The input is applied from a Keysight waveform generator. I did try to change the oscilloscope and waveform generators but these measures did not work. The diodes have no problems and work fine individually.
Could anybody please guide or point out the reasons why this is happening? Well, when I try to use one diode to check the unidirectional flow of current i.e half-wave rectification, it works fine but the polarity of the negative cycle does not change as shown in the figure below.