Monday, May 7, 2012

What's Wrong with my Function Generator? (hint: nothing)

You sit at your bench and in front of you is a a function generator and a basic oscilloscope.  You connect the function generator to the oscilloscope with a BNC cable and proceed to create a simple signal to measure.  Surprise, the amplitude measured on the oscilloscope does not match what you set on the function generator.  The sine wave may read 1V peak-to-peak (Vpp) on the function generator, and yet on the oscilloscope, it says 20Vpp or 2Vpp.  Now is when you ask,

"What is wrong with my function generator?"