Assertion: frequency's value | /r/HasProperty | adjustable
Facets:
value: under user control
type: OTHER
value: to alter its output frequency
type: PURPOSE
Source sentences:
text: An analog VFO is an electronic oscillator where the value of at least one of the passive components is adjustable under user control so as to alter its output frequency.
text: The passive component whose value is adjustable is usually a capacitor, but could be a variable inductor.