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I've asked my question before, and I am writing this new question with some edits based on my previous problem.
I am building a small FM Modulator ( Transmitting ) simulation on (Multisim). I've used a circuit that I had from Google, and welling to use it for my simulation. Note that this simulation is only for (Educational and Learning Purposes), Therefore, I've replaced the mic and the antenna with some signal generator and oscilloscope or signal analyzer.
The circuit that I used for my transmitter as follows:
When I built that circuit on Multisim, I've made many variable capacitors to notice any changes on the result and how the signal would be effected when the simulation is running.
I've placed function generator with ( Sinusoidal Function ) with ( 1 KHz ) Frequency on the input. On the other hand, The output has both of an oscilloscope and a Signal Analyzer. the output was weird on oscilloscope. But signal analyzer has almost a Sin function signal same as output. So the system has worked as Integrator, Not a modulator.
Example of the built circuit including the input and output stuff:
After having many changes on the circuit and too many tries, I've tried to add a capacitor attached to resistor in series with a signal generator to check if it removes the DC or ripples. and tried to connect the grounding to the circuit directly.. I had some other weird results as Follows:
Also, I've used another circuit (just a test), Used a function generator on the input, and added a carrier function generator on the emitter of the transistor, and put some oscilloscope to analyze the output as follows:
The output was also weird. Therefore, I guess the problem is how I am using the circuit and how I apply the input and output devices.
As for my information, when I am applying a (Sin) function signal to the input. the modulated output should be as follows:
Any suggestions whats wrong in my circuit and what changes do I have to make to have the expected results?