Goto Section: 95.1777 | 95.1787 | Table of Contents
FCC 95.1779
Revised as of September 1, 2021
Goto Year:2020 |
2022
§ 95.1779 GMRS unwanted emissions limits.
Each GMRS transmitter type must be designed to comply with the
applicable unwanted emissions limits in this section.
(a) Emission masks. Emission masks applicable to transmitting equipment
in the GMRS are defined by the requirements in the following table. The
numbers in the attenuation requirements column refer to rule paragraph
numbers under paragraph (b) of this section.
Emission types filter Attenuation
requirements
A1D, A3E, F1D, G1D, F2D, F3E, G3E with audio filter (1), (2), (7)
A1D, A3E, F1D, G1D, F3E, G3E without audio filter (3), (4), (7)
H1D, J1D, R1D, H3E, J3E, R2E (5), (6), (7)
(1) Filtering noted for GMRS transmitters refers to the requirement in
§ 95.1775(e).
(2) Unwanted emission power may be measured as either mean power or
peak envelope power, provided that the transmitter output power is
measured the same way.
(b) Attenuation requirements. The power of unwanted emissions must be
attenuated below the transmitter output power in Watts (P) by at least:
(1) 25 dB (decibels) on any frequency removed from the center of the
authorized bandwidth by more than 50% up to and including 100% of the
authorized bandwidth.
(2) 35 dB on any frequency removed from the center of the authorized
bandwidth by more than 100% up to and including 250% of the authorized
bandwidth.
(3) 83 log (fd ÷ 5) dB on any frequency removed from the center of the
authorized bandwidth by a displacement frequency (fd in kHz) of more
than 5 kHz up to and including 10 kHz.
(4) 116 log (fd ÷ 6.1) dB or 50 + 10 log (P) dB, whichever is the
lesser attenuation, on any frequency removed from the center of the
authorized bandwidth by a displacement frequency (fd in kHz), of more
than 10 kHz up to and including 250% of the authorized bandwidth.
(5) 25 dB on any frequency removed from the center of the authorized
bandwidth by more than 50% up to and including 150% of the authorized
bandwidth.
(6) 35 dB on any frequency removed from the center of the authorized
bandwidth by more than 150% up to and including 250% of the authorized
bandwidth.
(7) 43 + 10 log (P) dB on any frequency removed from the center of the
authorized bandwidth by more than 250%.
(c) Measurement bandwidths. The power of unwanted emissions in the
frequency bands specified in paragraphs (b)(1) through (4) of this
section is measured with a reference bandwidth of 300 Hz. The power of
unwanted emissions in the frequency range specified in paragraph (b)(5)
of this section is measured with a reference bandwidth of at least 30
kHz.
(d) Measurement conditions. The requirements in this section apply to
each GMRS transmitter type both with and without the connection of
permitted attachments, such as an external speaker, microphone, power
cord and/or antenna.
Goto Section: 95.1777 | 95.1787
Goto Year: 2020 |
2022
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