Amateur Extra › E7 Practical Circuits › E7E02
E7E02
What is the function of a reactance modulator?
Pick an answer to check it.
Answer: D. Produce PM or FM signals by varying a capacitance
A reactance modulator varies a capacitance (often with a varactor) in the oscillator's tuned circuit. That shifts the frequency or phase to produce FM or PM.
Tip: Reactance modulator varies capacitance.