Assertion: receiver | /r/HasProperty | necessary
Facets:
value: to change the local oscillator frequency
type: PURPOSE
Source sentences:
text: The receiver is easy to tune; to receive a different frequency it is only necessary to change the local oscillator frequency.
text: Some receivers require that claim forms be submitted, either electronically or by mail, and there may be additional required steps, such as clicking on a link in a verification email or accepting a determination letter.