In a transmitter that uses a high-power oscillator, what activates the oscillator?

In a high-power oscillator used in a transmitter, the activation typically comes from a high-voltage pulse provided by the modulator. This pulse is essential for initiating the oscillation process, as it supplies the necessary energy to the oscillator circuit. When the high voltage pulse is applied, it effectively sets the oscillator into operation by providing the required conditions for it to generate the radio frequency signals that are subsequently modulated for transmission.

The modulator plays a crucial role in many transmitter designs, especially in applying amplitude modulation or frequency modulation to the carrier wave. The high voltage pulse specifically acts as a trigger or startup signal that allows the oscillator to function properly, ensuring that it can produce a stable output signal at the desired frequency and power level for effective signal transmission.