47 C.F.R. § 5.101 Frequency stability.
Title 47 - Telecommunication
An applicant must propose to use a frequency tolerance that would confine emissions within the band of operation, unless permission is granted to use a greater frequency tolerance. Equipment is presumed to operate over the temperature range −20 to +50 degrees celsius with an input voltage variation of 85% to 115% of rated input voltage, unless justification is presented to demonstrate otherwise.
Title 47: Telecommunication
PART 5—EXPERIMENTAL RADIO SERVICE (OTHER THAN BROADCAST)
Subpart C—Technical Standards and Operating Requirements
§ 5.101 Frequency stability.
