Goto Section: 90.533 | 90.537 | Table of Contents
FCC 90.535
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 90.535 Modulation and spectrum usage efficiency requirements.
Transmitters designed to operate in 769-775 MHz and 799-805 MHz frequency
bands must meet the following modulation standards:
(a) All transmitters in the 769-775 MHz and 799-805 MHz frequency bands must
use digital modulation. Mobile and portable transmitters may have analog
modulation capability only as a secondary mode in addition to its primary
digital mode except on the interoperability channels listed in
§ 90.531(b)(1). Analog modulation is prohibited on the interoperability
channels. Mobile and portable transmitters that only operate on the low
power channels designated in § 90.531(b)(3) and (4) are exempt from this
digital modulation requirement.
(b) Transmitters designed to operate in the narrowband segment using digital
modulation must be capable of maintaining a minimum data (non-voice) rate of
4.8 kbps per 6.25 kHz of bandwidth.
(c) Transmitters designed to operate in the wideband segment using digital
modulation must be capable of maintaining a minimum data (non-voice) rate of
384 kbps per 150 kHz of bandwidth.
(d) Transmitters designed to operate on the channels listed in paragraphs
§ 90.531(b)(2), (b)(5), (b)(6), and (b)(7) must be capable of operating in
the voice mode at an efficiency of at least one voice path per 12.5 kHz of
spectrum bandwidth.
(1) With the exception of licensees designated in paragraph (d)(2) of this
section, after December 31, 2014, licensees may only operate in voice mode
in these channels at a voice efficiency of at least one voice path per 6.25
kHz of spectrum bandwidth.
(2) Licensees authorized to operate systems in the voice mode on these
channels from applications filed on or before December 31, 2014, may
continue operating in voice mode on these channels (including modification
applications of such licenses granted after December 31, 2014, for expansion
or maintenance of such systems) at a voice efficiency of at least one voice
path per 12.5 kHz of spectrum bandwidth until December 31, 2016.
(3) The licensees designated in paragraph (d)(2) of this section must, no
later than January 31, 2017, file a declaration through the Universal
Licensing System that they are operating these channels at a voice
efficiency of at least one voice path per 6.25 kHz of spectrum bandwidth.
[ 63 FR 58651 , Nov. 2, 1998, as amended at 65 FR 53645 , Sept. 5, 2000; 65 FR 66655 , Nov. 7, 2000; 67 FR 76701 , Dec. 13, 2002; 70 FR 21673 , Apr. 27, 2005;
72 FR 48861 , Aug. 24, 2007; 79 FR 71326 , Dec. 2, 2014]
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Goto Section: 90.533 | 90.537
Goto Year: 2014 |
2016
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