Hi. How can I filter out these impulse noises until without disturbing the pulse communication signal?

 

What is the application? What are you trying to measure? How are you probing the circuit?

 

Does the scope have any input filtering available? Or, run it through a unity gain op-amp.

 

Hi. How can I filter out these impulse noises until without disturbing the pulse communication signal?
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Data lines often use common mode chokes to supress noise. Common mode chokes contain very litte leakage inductance which provides a small amount of differential filtering when used with a very small differential capacitor and the common mode inductance has very little effect on the actual data signal. You can evaluate common mode effectiveness by winding the data lines around a ferrite.

 

One possible way to minimize impulse noise is to use a slew-rate limiting filter.
It will not affect signals below the filter slew-rate, but will suppress those faster than that.

What is the frequency of your signal?