Using Oscilloscope
Can the oscilloscope be used with probes or am I limited to only using it with a mic through a pre amp?
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Comments
You might want to take a look at the SignalScope tips page (http://faberacoustical.com/SignalScope/Tips.php) for some hookup suggestions.
Ben
I`m using it to measure an audio signal to check for clipping. I`ve fed the source a 0dbfs 1kb tone measured the rms voltage w/ a dmm .73 volts and set the full scale voltage according to that number...good so far?
Now, I`m using an Mbox2 as the audio inputs. Is there any way I could be overdriving the inputs of the Mbox2? In other words could what the o`scope be showing as a clipped signal not be the actual signal but something in the Mbox2? I ask this because no matter what signal I measure I always get a reading of .73 volts even after setting the full scale voltage.
Here are some specs on the Mbox2:
Input impedance >1MOhm
Max input level 8volts Rms
Sorry for the long post.....any help is appreciated!
So, in SignalScope, you tweaked the user-defined full-scale voltage until the oscilloscope indicated a level of 0.73 Vrms on the appropriate input channel. What full-scale voltage did you settle on?
Getting the same reading suggests that you could be clipping on the input channel and that you are reading a peak voltage (Vpk) rather than an rms voltage (and that your full-scale voltage is incorrect).
What does the waveform look like in the oscilloscope?
Do you have any specs (or measurements) that indicate what the full scale output of the CD player in your head unit is?