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Setup for TA 112 active probe

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Setup for TA 112 active probe

Postby jacob.larsen » Thu Sep 04, 2014 3:11 pm

Hi

I have a Picoscope 6404D with 4 TA 112 probes. Do you have .psprobe files for these? The default setup with x10 seems to measure double voltage, showing 3.6V where I expect 1.8V.

/Jacob
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Re: Setup for TA 112 active probe

Postby bennog » Thu Sep 04, 2014 5:50 pm

The probe expects a 50 ohm load on the output.
The pico is 1 M ohm so it is normal to see double the expected output (you need to use a 50 ohm plugin)
Or set the scope to 1:5 in stead of 1:10

Benno
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Re: Setup for TA 112 active probe

Postby jacob.larsen » Fri Sep 05, 2014 12:13 pm

I tried configuring a custom x5 probe, but it seems the signal gets very blurred on the screen if I do this. Do I need to do anything else for this?
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Re: Setup for TA 112 active probe

Postby jacob.larsen » Fri Sep 05, 2014 2:12 pm

Hi

I found the 50 Ohm input setting in the Picoscope software. Much easier than using extra hardware.

/Jacob
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