PXI

cancel
Showing results for 
Search instead for 
Did you mean: 

Input specification NI PXIe-5114 125 MHz Oscilloscope

Situation is as follows: we have is that we have several test-equipment where the PXIe-5114 is applied. This test-equipment is connected to a test-fixture on which our products are tested.

We want to be sure that all test-fixtures are identical and interchangeable between our test-equipment (using all the PXIe-5114).

So to be 100% sure that we measure in all situations the same value, we have to adjust our test-fixtures, assuming that all PXIe-5114 are 100% identical.

 

On page 3 at the PXIe-5114 Specifications we found:

Impedance and Coupling
    Input impedance
       50 Ω         50 Ω ± 1.5%
       1 MΩ        1 MΩ ± 1% in parallel with a nominal capacitance of 26 pF

 

Question: What is the tolerance for the stated 26 pF?

 

Thanks for your help!

0 Kudos
Message 1 of 3
(341 Views)

Typical practice in manufacturing is to perform Gauge Repeatability and Reproducibility to ensure the variation in the process (test system) does not influence the material (device under test). You could perform such GR&R activity to understand the test system variation (instruments, cables, fixtures etc.,) and determine your accuracy and thereby adjust your test limits instead of trying to get everything perfect.

Santhosh
Soliton Technologies

New to the forum? Please read community guidelines and how to ask smart questions

Only two ways to appreciate someone who spent their free time to reply/answer your question - give them Kudos or mark their reply as the answer/solution.

Finding it hard to source NI hardware? Try NI Trading Post
Message 2 of 3
(322 Views)

Thanks, sure this will help us and we also figured out the requested tolerance of the Capacitor.
For now we have sufficient information.

0 Kudos
Message 3 of 3
(246 Views)