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High Freq signal measuring with low freq ossiliscope

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kil

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Hi All,

1. I would like to know what will happen when you try to measure the High frequency signal in Low Frequency measuring oscilloscope. how the signal looks like ?

2. when the high speed signal has the Over shoot and undershoot as a result of Termination problem but the signal is well with in the limits of the receiver noise margin does there is any effect of the overshoot and undershoot of the signal at the receiver...

Regards
kil
 

camr

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1. the exact results might depend on the scope(analog vs. digital for example) but in general you'll get aliasing. The display will be erratic, show the wrong frequency, and not be very useful (could be misleading if you are unaware that you've exceeded the sampling rate!).

2. Not very clear what you're asking. assuming this is a digital receiver, if the input signal is ugly but within required limits, it may still hurt your system's robustness / error rate by reducing margin against other noise, and by adding excess noise to the power plane and / or nearby signals.
 

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