Why Can't I Get a V-I Curve on My Agilent Oscilloscope?

[Ai52487963]

Ok, we have a standard Agilent oscilloscope and need to get a V-I curve for this bad boy. We got a BNC cable with our V and another with our I, but we can't get a V-I curve at all. We just get 2 flat lines that correspond to V and I independantly.

Our instructions say we just plug V into the X end of the 'scope and the I into the Y. Is there a menu somewhere to set this thing or what?

 

[Redbelly98]

You need to set the 'scope to XY mode. Here are instructions for several Agilent models:

http://www.home.agilent.com/agilent/faqDetail.jspx?cc=US&lc=eng&ckey=737462&nid=-35802.383408.02&id=737462

 

[nlightner]

Hello there,

Based on the information provided, it seems like there may be a few potential issues that could be causing the problem with obtaining a V-I curve on your oscilloscope.

First, it is important to make sure that the BNC cables are properly connected to the V and I sources and to the oscilloscope. Double check that they are securely plugged in and that there are no loose connections.

Next, it is possible that the oscilloscope needs to be set to a specific mode or setting in order to display a V-I curve. I would recommend consulting the user manual or contacting the manufacturer for guidance on how to properly set up the oscilloscope for V-I curve measurements.

Additionally, the V-I curve may not be displayed if the voltage and current signals are not varying over time. Make sure that the V and I sources are providing varying signals, such as using a function generator or changing the settings on the power supply.

It is also important to ensure that the oscilloscope is properly calibrated and that the settings are accurate for the measurements being taken. If the oscilloscope is not calibrated, it may not accurately display the V-I curve.

I hope this helps and good luck with obtaining your V-I curve on the oscilloscope. If you continue to have trouble, it may be helpful to consult with a colleague or reach out to the manufacturer for further assistance.