Why you can only see square waveform when using CRO probe checker?

[bharathi_dasan]

in every CRO there is a provision for probe checking... while checking the probe we could see square waveform why not sinusoidal waveform?.. is there any reason for using square waveform...

 

[VVV]

cro probes checking

A square-wave is easier to generate with stable amplitude and frequency.
It is also easier to check the scope with a square-wave signal than it is with a sinusoidal one. Try measuring the period of a sinewave, compared to a square-wave. The sharp edges of the square-wave signal makes things a lot easier. A similar thing goes for the amplitude, too.

Moreover, checking the probe compensation is very easy with a square-wave, since you can easily see if the flat top and bottom are distorted. With a sine-wave you would see the amplitude of the signal change as you adjust the probe, but how do you know when the amplitude is right and the probe correctly compensated?

 

[cesare]

cro probe compensation

The Square Wave generated from the CRO probe checker has a frequency of some Khz but very sharp edges so that it conteins both low and High frequency components. This allows the probe compensation

 

[bharathi_dasan]

cro probe

as told above square pulse is rich in harmonics .. it allows the compensation....