Goto Section: 2.1043 | 2.1047 | Table of Contents
FCC 2.1046
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 2.1046 Measurements required: RF power output.
(a) For transmitters other than single sideband, independent sideband and
controlled carrier radiotelephone, power output shall be measured at the RF
output terminals when the transmitter is adjusted in accordance with the
tune-up procedure to give the values of current and voltage on the circuit
elements specified in § 2.1033(c)(8). The electrical characteristics of the
radio frequency load attached to the output terminals when this test is made
shall be stated.
(b) For single sideband, independent sideband, and single channel,
controlled carrier radiotelephone transmitters the procedure specified in
paragraph (a) of this section shall be employed and, in addition, the
transmitter shall be modulated during the test as follows. In all tests, the
input level of the modulating signal shall be such as to develop rated peak
envelope power or carrier power, as appropriate, for the transmitter.
(1) Single sideband transmitters in the A3A or A3J emission modes—by two
tones at frequencies of 400 Hz and 1800 Hz (for 3.0 kHz authorized
bandwidth), or 500 Hz and 2100 Hz (3.5 kHz authorized bandwidth), or 500 Hz
and 2400 Hz (for 4.0 kHz authorized bandwidth), applied simultaneously, the
input levels of the tones so adjusted that the two principal frequency
components of the radio frequency signal produced are equal in magnitude.
(2) Single sideband transmitters in the A3H emission mode—by one tone at a
frequency of 1500 Hz (for 3.0 kHz authorized bandwidth), or 1700 Hz (for 3.5
kHz authorized bandwidth), or 1900 Hz (for 4.0 kHz authorized bandwidth),
the level of which is adjusted to produce a radio frequency signal component
equal in magnitude to the magnitude of the carrier in this mode.
(3) As an alternative to paragraphs (b) (1) and (2) of this section other
tones besides those specified may be used as modulating frequencies, upon a
sufficient showing of need. However, any tones so chosen must not be
harmonically related, the third and fifth order intermodulation products
which occur must fall within the −25 dB step of the emission bandwidth
limitation curve, the seventh and ninth order intermodulation product must
fall within the 35 dB step of the referenced curve and the eleventh and all
higher order products must fall beyond the −35 dB step of the referenced
curve.
(4) Independent sideband transmitters having two channels by 1700 Hz tones
applied simultaneously in both channels, the input levels of the tones so
adjusted that the two principal frequency components of the radio frequency
signal produced are equal in magnitude.
(5) Independent sideband transmitters having more than two channels by an
appropriate signal or signals applied to all channels simultaneously. The
input signal or signals shall simulate the input signals specified by the
manufacturer for normal operation.
(6) Single-channel controlled-carrier transmitters in the A3 emission
mode—by a 2500 Hz tone.
(c) For measurements conducted pursuant to paragraphs (a) and (b) of this
section, all calculations and methods used by the applicant for determining
carrier power or peak envelope power, as appropriate, on the basis of
measured power in the radio frequency load attached to the transmitter
output terminals shall be shown. Under the test conditions specified, no
components of the emission spectrum shall exceed the limits specified in the
applicable rule parts as necessary for meeting occupied bandwidth or
emission limitations.
[ 39 FR 5919 , Feb. 15, 1974. Redesignated and amended at 63 FR 36599 , July 7,
1998]
return arrow Back to Top
Goto Section: 2.1043 | 2.1047
Goto Year: 2014 |
2016
CiteFind - See documents on FCC website that
cite this rule
Want to support this service?
Thanks!
Report errors in
this rule. Since these rules are converted to HTML by machine, it's possible errors have been made. Please
help us improve these rules by clicking the Report FCC Rule Errors link to report an error.
hallikainen.com
Helping make public information public