modulator

[moj-uh-ley-ter]
noun
1.
a person or thing that modulates.
2.
Telecommunications. a device for modulating a carrier wave.

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

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World English Dictionary
modulate (ˈmɒdjʊˌleɪt)
 
vb
1.  (tr) to change the tone, pitch, or volume of
2.  (tr) to adjust or regulate the degree of
3.  music
 a.  to subject to or undergo modulation in music
 b.  (often foll by to) to make or become in tune (with a pitch, key, etc)
4.  (tr) physics, electronics to cause to vary by a process of modulation
 
[C16: from Latin modulātus in due measure, melodious, from modulārī to regulate, from modus measure]
 
modulability
 
n
 
'modulative
 
adj
 
'modulatory
 
adj
 
'modulator
 
n

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Example sentences
It seems this device would be the perfect modulator for an all photonic router between fiber optic cables.
In this scheme, signal charge from a detector may be applied directly to the electrodes of the modulator.
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