Transmitter power output is measured in ______________________.

Transmitter power output is measured in Watts. This unit represents the rate of energy transfer or conversion. In the context of transmitters, power output refers to the strength of the signal being transmitted, which is directly related to the effective range and clarity of communication. Higher wattage indicates a more powerful transmission, enabling signals to travel longer distances and penetrate obstacles more effectively. Therefore, the measurement in Watts is crucial for assessing the performance of transmitters and ensuring they meet the required specifications for specific communication applications.

The other options relate to different electrical and physical properties. Amperes measure electrical current, Pascals measure pressure, and Volts measure electrical potential. While these units are essential in electrical engineering and physics, they do not specifically quantify the power output of transmitters.