Goto Section: 2.1077 | 2.1093 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 2.1091 Radiofrequency radiation exposure evaluation: mobile devices.
(a) Requirements of this section are a consequence of Commission
responsibilities under the National Environmental Policy Act to
evaluate the environmental significance of its actions. See subpart I
of part 1 of this chapter, in particular § 1.1307(b).
(b) For purposes of this section, the definitions in § 1.1307(b)(2) of
this chapter shall apply. A mobile device is defined as a transmitting
device designed to be used in other than fixed locations and to
generally be used in such a way that a separation distance of at least
20 centimeters is normally maintained between the RF source's radiating
structure(s) and the body of the user or nearby persons. In this
context, the term “fixed location” means that the device is physically
secured at one location and is not able to be easily moved to another
location while transmitting. Transmitting devices designed to be used
by consumers or workers that can be easily re-located, such as wireless
devices associated with a personal desktop computer, are considered to
be mobile devices if they meet the 20-centimeter separation
(c)(1) Evaluation of compliance with the exposure limits in § 1.1310 of
this chapter, and preparation of an EA if the limits are exceeded, is
necessary for mobile devices with single RF sources having either more
than an available maximum time-averaged power of 1 mW or more than the
ERP listed in Table 1 to § 1.1307(b)(3)(i)(C), whichever is greater. For
mobile devices not exempt by § 1.1307(b)(3)(i)(C) at distances from 20
centimeters to 40 centimeters and frequencies from 0.3 GHz to 6 GHz,
evaluation of compliance with the exposure limits in § 1.1310 of this
chapter is necessary if the ERP of the device is greater than ERP20cm
in the formula below. If the ERP of a single RF source at distances
from 20 centimeters to 40 centimeters and frequencies from 0.3 GHz to 6
GHz is not easily obtained, then the available maximum time-averaged
power may be used (i.e., without consideration of ERP) in comparison
with the following formula only if the physical dimensions of the
radiating structure(s) do not exceed the electrical length of λ/4 or if
the antenna gain is less than that of a half-wave dipole (1.64 linear
eCFR graphic er01ap20.006.gif
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(2) For multiple mobile or portable RF sources within a device
operating in the same time averaging period, routine environmental
evaluation is required if the formula in § 1.1307(b)(3)(ii)(B) of this
chapter is applied to determine the exemption ratio and the result is
greater than 1.
(3) Unless otherwise specified in this chapter, any other single mobile
or multiple mobile and portable RF source(s) associated with a device
is exempt from routine environmental evaluation for RF exposure prior
to equipment authorization or use, except as specified in § 1.1307(c)
and (d) of this chapter.
(d)(1) Applications for equipment authorization of mobile RF sources
subject to routine environmental evaluation must contain a statement
confirming compliance with the limits specified in § 1.1310 of this
chapter as part of their application. Technical information showing the
basis for this statement must be submitted to the Commission upon
request. In general, maximum time-averaged power levels must be used
for evaluation. All unlicensed personal communications service (PCS)
devices and unlicensed NII devices shall be subject to the limits for
general population/uncontrolled exposure.
(2)(i) For purposes of analyzing mobile transmitting devices under the
occupational/controlled criteria specified in § 1.1310 of this chapter,
time averaging provisions of the limits may be used in conjunction with
the maximum duty factor to determine maximum time-averaged exposure
levels under normal operating conditions.
(ii) Such time averaging provisions based on maximum duty factor may
not be used in determining exposure levels for devices intended for use
by consumers in general population/uncontrolled environments as defined
in § 1.1310 of this chapter. However, “source-based” time averaging
based on an inherent property of the RF source is allowed over a time
period not to exceed 30 minutes. An example of this is the
determination of exposure from a device that uses digital technology
such as a time-division multiple-access (TDMA) scheme for transmission
of a signal.
(3) If appropriate, awareness of exposure from devices in this section
can be accomplished by the use of visual advisories (such as labeling,
embossing, or on an equivalent electronic display) and by providing
users with information concerning minimum separation distances from
radiating structures and proper installation of antennas.
(i) Visual advisories shall be legible and clearly visible to the user
from the exterior of the device.
(ii) Visual advisories used on devices that are subject to
occupational/controlled exposure limits must indicate that the device
is for occupational use only, must refer the user to specific
information on RF exposure, such as that provided in a user manual, and
must note that the advisory and its information is required for FCC RF
exposure compliance. Such instructional material must provide the user
with information on how to use the device in order to ensure compliance
with the occupational/controlled exposure limits.
(iii) A sample of the visual advisory, illustrating its location on the
device, and any instructional material intended to accompany the device
when marketed, shall be filed with the Commission along with the
application for equipment authorization.
(iv) For occupational devices, details of any special training
requirements pertinent to limiting RF exposure should also be
submitted. Holders of grants for mobile devices to be used in
occupational settings are encouraged, but not required, to coordinate
with end-user organizations to ensure appropriate RF safety training.
(4) In some cases, e.g., modular or desktop transmitters, the potential
conditions of use of a device may not allow easy classification of that
device as either mobile or portable (also see § 2.1093). In such cases,
applicants are responsible for determining minimum distances for
compliance for the intended use and installation of the device based on
evaluation of either specific absorption rate (SAR), field strength or
power density, whichever is most appropriate.
[ 61 FR 41017 , Aug. 7, 1996, as amended at 62 FR 4655 , Jan. 31, 1997; 62 FR 9658 , Mar. 3, 1997; 62 FR 47966 , Sept. 12, 1997; 68 FR 38638 , June
30, 2003; 69 FR 3264 , Jan. 23, 2004; 70 FR 24725 , May 11, 2005; 78 FR 21559 , Apr. 11, 2013; 78 FR 29062 , May 17, 2013; 78 FR 33651 , June 4,
2013; 80 FR 36221 , June 23, 2015; 81 FR 79936 , Nov. 14, 2016; 82 FR 43870 , Sept. 20, 2017; 84 FR 25689 , June 4, 2019; 85 FR 38739 , June 26,
2020; 85 FR 18146 , Apr. 1, 2020]
Goto Section: 2.1077 | 2.1093
Goto Year: 2020 |
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