1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Oscilloscope, bread board set up, measuring phase / gain etc.

  1. Mar 22, 2013 #1

    js6

    User Avatar

    1. The problem statement, all variables and given/known data

    Hi,

    I've been having trouble setting up an oscilloscope, with a AC voltage supply, to a breadbox, with a "black box" in the circuit. the black box is just a set of 3 pairs of terminals, each a "unknown component" such as a diode, capacitor, resistor, etc.

    Basically I need to figure out how to properly construct the circuit to obtain values for phase, peak-peak voltage, etc using the oscilloscope, which would then allow me to determine the components. (Where to plug things in, such as the Ch.1 / Ch.2 of the oscilloscope, and the output of the AC voltage, with the board and the box.)

    I was wondering if anyone has a diagram, or picture of such a set up that could help me, my attempts have been fairly basic, and encounter problems such as the grounding?

    Thanks :smile:
     
    Last edited by a moderator: Mar 22, 2013
  2. jcsd
  3. Mar 22, 2013 #2

    berkeman

    User Avatar

    Staff: Mentor

    Welcome to the PF.

    So can you say more about these black boxes? Are the 3 contacts basically the input, ground and output? And you are tasked with determining the transfer function Vout/Vin, and modeling it with discrete components?

    Except for the diodes part, this is what the transfer function measurement does with impedance analyzers like the HP 4194. It has a swept AC excitation source, and a monitoring port that measures the transfer function (amplitude and phase) versus frequency. That is basically what you need to do manually with your signal generator and oscilloscope.
     
  4. Mar 22, 2013 #3

    nsaspook

    User Avatar
    Science Advisor

    Last edited by a moderator: May 6, 2017
  5. Mar 24, 2013 #4

    js6

    User Avatar

    Thanks for the replies,

    The black box is just basic 2 terminals for each component, and yes I have to measure the gain (Vout/Vin) of the voltage drop over each unknown component, and other things such as phase. I understand what to expect from each component, however my problem lies in the actual set-up of the osscilloscope / AC generator / black box system,

    I'll attach some pictures to show what I think I'll have to do, maybe someone can confirm the diagram is correct? Like I said, I understand what to expect from theory, it's just how to set-up the equipment with one another is my problem,

    EDIT: Also, maybe if someone can clarify the exact purpose of the extra resistor, which would help a lot

    Thanks again,
     

    Attached Files:

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Oscilloscope, bread board set up, measuring phase / gain etc.
  1. Setting up the KE? (Replies: 3)

Loading...