§ 97.3 Definitions.
(b) The definitions of technical symbols
used in this part are:
(9) UHF (ultra-high frequency). The
frequency range 300–3000 MHz.
----------------------------------------------
§ 97.3 Definitions.
(c) The following terms are used in
this part to indicate emission types.
Refer to § 2.201 of the FCC Rules, Emission,
modulation and transmission characteristics,
for information on emission
type designators.
(8) SS. Spread spectrum emissions
using bandwidth-expansion modulation
emissions having designators with A,
C, D, F, G, H, J or R as the first symbol;
X as the second symbol; X as the
third symbol.
§ 2.201 Emission, modulation, and
transmission characteristics.
The following system of designating
emission, modulation, and transmission
characteristics shall be employed.
(a) Emissions are designated according
to their classification and their
necessary bandwidth.
(b) A minimum of three symbols are
used to describe the basic characteristics
of radio waves. Emissions are classified
and symbolized according to the
following characteristics:
(1) First symbol—type of modulation
of the main character;
(2) Second symbol—nature of signal(
s) modulating the main carrier;
(3) Third symbol—type of information
to be transmitted.
(c) First Symbol—types of modulation
of the main carrier:
(2) Emission in which the main
carrier is amplitude-modulated
(including cases where sub-carriers
are angle-modulated):.
—Double-sideband ....................... A
—Single-sideband, full carrier ..... H
—Single-sideband, reduced or
variable level carrier ................ R
—Single-sideband, suppressed
carrier ...................................... J
—Vestigial sideband .................... C
(3) Emission in which the main
carrier is angle-modulated:.
—Frequency modulation ............. F
—Phase modulation ..................... G
NOTE: Whenever frequency modulation ‘‘F’’
is indicated, Phase modulation ‘‘G’’ is also
acceptable.
(4) Emission in which the main
carrier is amplitude and anglemodulated
either simultaneously
or in a pre-established sequence .. D
Lester B Veenstra MØYCM K1YCM
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From: [email protected] [mailto:[email protected]] On
Behalf Of [email protected]
Sent: Tuesday, July 13, 2010 1:52 PM
To: [email protected]
Subject: Re: [digitalradio] Re: Moving ROS forward in the USA?
sorry, my typo. It's in 97.3. (b)(9)
