Goto Section: 15.317 | 15.321 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 15.319 General technical requirements.
(b) All transmissions must use only digital modulation techniques. Both
asynchronous and isochronous operations are permitted within the
1920-1930 MHz band.
(c) Peak transmit power shall not exceed 100 microwatts multiplied by
the square root of the emission bandwidth in hertz. Peak transmit power
must be measured over any interval of continuous transmission using
instrumentation calibrated in terms of an rms-equivalent voltage. The
measurement results shall be properly adjusted for any instrument
limitations, such as detector response times, limited resolution
bandwidth capability when compared to the emission bandwidth,
sensitivity, etc., so as to obtain a true peak measurement for the
emission in question over the full bandwidth of the channel.
(d) Power spectral density shall not exceed 3 milliwatts in any 3 kHz
bandwidth as measured with a spectrum analyzer having a resolution
bandwidth of 3 kHz.
(e) The peak transmit power shall be reduced by the amount in decibels
that the maximum directional gain of the antenna exceeds 3 dBi.
(f) The device shall automatically discontinue transmission in case of
either absence of information to transmit or operational failure. The
provisions in this section are not intended to preclude transmission of
control and signaling information or use of repetitive codes used by
certain digital technologies to complete frame or burst intervals.
(g) Notwithstanding other technical requirements specified in this
subpart, attenuation of emissions below the general emission limits in
§ 15.209 is not required.
(h) Where there is a transition between limits, the tighter limit shall
apply at the transition point.
(i) Radio frequency devices operating under the provisions of this part
are subject to the radio frequency radiation exposure requirements
specified in § § 1.1307(b), 1.1310, 2.1091, and 2.1093 of this chapter,
as appropriate. All equipment shall be considered to operate in a
“general population/uncontrolled” environment. Applications for
equipment authorization of mobile or portable devices operating under
this section must contain a statement confirming compliance with these
requirements. Technical information showing the basis for this
statement must be submitted to the Commission upon request.
[ 58 FR 59180 , Nov. 8, 1993, as amended at 59 FR 32852 , June 24, 1994;
59 FR 40835 , Aug. 10, 1994; 60 FR 13073 , Mar. 10, 1995; 61 FR 41018 ,
Aug. 7, 1996; 69 FR 62621 , Oct. 27, 2004; 69 FR 77949 , Dec. 29, 2004;
77 FR 43013 , July 23, 2012; 85 FR 18149 , Apr. 1, 2020]
Goto Section: 15.317 | 15.321
Goto Year: 2020 |
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