Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

National Instruments PXI-4071 oscillation noise on 6.5 Digit resolution

National Instruments PXI-4071 oscillation noise on 6.5 Digit resolution

National Instruments PXI-4071 oscillation noise on 6.5 Digit resolution

Refering to the attached graphic:
Two NI PXI-4071s measure the same ramping stimulus voltage one sample at a time as both 4071s cycle through 3.5, 4.5, 5.5, 6.5 and then 7.5 digit-resolution settings. The graph labeled “dV Waveform Chart” displays an acquired-PXI-4071-Refference voltage subtracted from an acquired-PXI-4071-DUT Voltage as the (Blue) center trace along with the (White) maximum-tolerance-limit above and the (Red) minimum tolerance-limit below. The graph labeled “V Waveform Chart” displays the (Red) inverted-PXI-4071-Refference-Range, (White) noninverted-PXI-4071-DUT-Range and (Blue) applied-stimulus-ramp-voltage. There is a peculiar oscillation displayed on the “dV Waveform Chart” that occurs only during 6.5 digit resolution on 0.1V, 1V, 10V, 100V & 1000V range acquisitions and becomes less significant at the higher ranges. Changing the internal-zeroing and/or internal-calibration settings changes the oscillation offset and/or frequency but not the peak-to-peak amplitude. What is this oscillation and how can it be eliminated? As can be seen, there is less noise at 5.5 digit-resolution than at 6.5 digit-resolution.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close