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Probe attenuation setting

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Probe attenuation setting

Postby ulek » Mon Aug 12, 2013 3:00 pm

Hey all,

How would I go about setting custom attenuation for the probes on the picoscope in labview?

When I use 100 probes then the signal in the labview is absolutely ugly.

Thanks
Ulek
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Re: Probe attenuation setting

Postby Hitesh » Mon Aug 12, 2013 3:53 pm

Hi Ulek,

You will need to scale your readings back e.g. multiply by 100 if you are using the x100 setting.

I hope this helps.

Regards,
Hitesh

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Re: Probe attenuation setting

Postby ulek » Tue Aug 13, 2013 5:48 am

Hey,

That is what I am doing right now.

When I use the 10x probes and account for that (after digital to analog conversion multiply by 10) in the program everything is fine.

When I use the 100x probes and do the same thing as for the 10x probes (multiply 100 instead of 10) the signal is extremely noisy and basically unusable.
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Re: Probe attenuation setting

Postby Hitesh » Tue Aug 13, 2013 2:33 pm

Hi Ulek,

What is the amplitude of the signal you are measuring? Which PicoScope and 100x probe are you using?

It might be that the attenuation is taking the signal close to the noise floor. Have you tried changing the voltage range?

Regards,
Hitesh

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