modulator

[ moj-uh-ley-ter ]

/ ˈmɒdʒ əˌleɪ tər /

a person or thing that modulates.

Telecommunications. a device for modulating a carrier wave.

Origin of modulator

1490–1500; < Latin modulātor; see modulate, -tor

A minute force becomes the modulator of a much greater force, and thus from imperceptible becomes conspicuous.

A Popular History of Astronomy During the Nineteenth Century |Agnes M. (Agnes Mary) Clerke
So Lockley flipped the modulator switch and turned on the instrument.

Operation Terror |William Fitzgerald Jenkins
In this latter figure you will notice a small air-core coil, LR, between the oscillator and the modulator tube.

Letters of a Radio-Engineer to His Son |John Mills
In modulator practice, and as far as possible in pieces of music, he keeps the trebles above .

The Boy's Voice |J. Spencer Curwen

Now there are three different ways that the microphone and its modulator can be connected in circuit.

The Radio Amateur's Hand Book |A. Frederick Collins