Samplig rate and SNR

[rakeshm55]

Hi,
Recently i came across

""Oscilloscope signal-to-noise ratio can best be improved by:    Increasing the oscilloscope's sample rate ""
in Friday Quiz published in eetimes....link as given below

http://www.eetimes.com/author.asp?doc_id=1328192&page_number=5

How can sampling rate affect signal to noise ratio??"Can some one help me understand the concept.......My understanding is limited to SNR affected by adc resolution.....

[rs20]

My guess is that they're referring to Hi-res sampling mode; where consecutive samples are averaged together to achieve noise reduction (see here). In principle, with a higher sampling rate, hi-res mode can do more averaging and thus reduce noise.

[scatha]

Oversampling then filtering reduces quantization noise, which could be what they are referring to.