hi,

I have an function generator and now i'm working on the basic BJT amplifiers. But in the calculation i need the source resistance of the function generator. Does anyone know how to measure or calculate the source resistance of the function generator?

thanks you.

 

Measure the output without a load, measure the output with a known load. You have a voltage divider equation.

 

Same as above BIlll mention. When the output voltage droped half of its voltage,then the loaded resistor is equal to the output resistance of generator.

 

Quality generators are designed to drive 50 ohms, which is why it is necessary to halve the output voltage setting/reading when driving much higher (>> 50 ohms) loads.