# Help - RMS Value

Discussion in 'Homework Help' started by ashkash, Feb 25, 2007.

1. ### ashkash Thread Starter New Member

Feb 25, 2007
1
0
Determine the rms value of the voltage that is measured as a function of frequency at f = 3.22MHz. e(t) = 50sqrt(2)cos(wt). A 100MHz oscilliscope is being used to measure the voltage across nodes AA' as seen in the figure. The input impedence of the oscilliscope is a 1Mohm resistor in parallel with a 13pF capacitor. Also, calculate the rms voltage value that would be measured with an ideal oscilliscope (one with an infinite input imedence).

I do not know where to start with this problem. I need to calculate the rms voltage measured with an ideal oscilliscope and an oscilliscope with the specified characteristics above. I have attached the circuit image. Any help would be appreciated. thanks.

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2. ### hgmjr Moderator

Jan 28, 2005
9,030
214
Take a look at this tutorial on AC signal measurement and see if it helps you with your homework.

hgmjr