PicoScope 7 Software
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Sampling rate vs downsampling
Sampling rate vs downsampling
Hi there!
I've been looking for an answer to my question, but I can't find it or I'm looking for the wrong keywords. We have a 5242D Picoscope and measure the signal in rapid block mode. Memory is not an issue. The discussion we are having is whether it is better to measure at 125Mhz and then sample down (using averaging) to 25Mhz or measure at 25Mhz as this is equivalent. So if we measure at 25Mhz will it just deliver every 5th sample (so to speak) or is there some kind of hardware filter if a lower sampling rate is chosen?
Thanks for any insight!
Best regards,
Werner
I've been looking for an answer to my question, but I can't find it or I'm looking for the wrong keywords. We have a 5242D Picoscope and measure the signal in rapid block mode. Memory is not an issue. The discussion we are having is whether it is better to measure at 125Mhz and then sample down (using averaging) to 25Mhz or measure at 25Mhz as this is equivalent. So if we measure at 25Mhz will it just deliver every 5th sample (so to speak) or is there some kind of hardware filter if a lower sampling rate is chosen?
Thanks for any insight!
Best regards,
Werner
Re: Sampling rate vs downsampling
Hi
If you measure at 25 MHz the scope will take samples at that sample rate rather than some kind of downsampling or filtering happening on the data.
Downsampling can be useful in certain situations such as using the average downsampling mode to help reduce noise but it depends on exactly what you're trying to do with the scope.
Neil
If you measure at 25 MHz the scope will take samples at that sample rate rather than some kind of downsampling or filtering happening on the data.
Downsampling can be useful in certain situations such as using the average downsampling mode to help reduce noise but it depends on exactly what you're trying to do with the scope.
Neil
Neil
Technical Support Engineer
Technical Support Engineer