Goto Section: 15.211 | 15.213 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 15.212 Modular transmitters.
(a) Single modular transmitters consist of a completely self-contained
radiofrequency transmitter device that is typically incorporated into
another product, host or device. Split modular transmitters consist of
two components: a radio front end with antenna (or radio devices) and a
transmitter control element (or specific hardware on which the software
that controls the radio operation resides). All single or split modular
transmitters are approved with an antenna. All of the following
requirements apply, except as provided in paragraph (b) of this
(1) Single modular transmitters must meet the following requirements to
obtain a modular transmitter approval.
(i) The radio elements of the modular transmitter must have their own
shielding. The physical crystal and tuning capacitors may be located
external to the shielded radio elements.
(ii) The modular transmitter must have buffered modulation/data inputs
(if such inputs are provided) to ensure that the module will comply
with part 15 requirements under conditions of excessive data rates or
(iii) The modular transmitter must have its own power supply
(iv) The modular transmitter must comply with the antenna and
transmission system requirements of § § 15.203, 15.204(b) and 15.204(c).
The antenna must either be permanently attached or employ a “unique”
antenna coupler (at all connections between the module and the antenna,
including the cable). The “professional installation” provision of
§ 15.203 is not applicable to modules but can apply to limited modular
approvals under paragraph (b) of this section.
(v) The modular transmitter must be tested in a stand-alone
configuration, i.e., the module must not be inside another device
during testing for compliance with part 15 requirements. Unless the
transmitter module will be battery powered, it must comply with the AC
line conducted requirements found in § 15.207. AC or DC power lines and
data input/output lines connected to the module must not contain
ferrites, unless they will be marketed with the module (see § 15.27(a)).
The length of these lines shall be the length typical of actual use or,
if that length is unknown, at least 10 centimeters to insure that there
is no coupling between the case of the module and supporting equipment.
Any accessories, peripherals, or support equipment connected to the
module during testing shall be unmodified and commercially available
(see § 15.31(i)).
(vi) The modular transmitter must be equipped with either a permanently
affixed label or must be capable of electronically displaying its FCC
(A) If using a permanently affixed label, the modular transmitter must
be labeled with its own FCC identification number, and, if the FCC
identification number is not visible when the module is installed
inside another device, then the outside of the device into which the
module is installed must also display a label referring to the enclosed
module. This exterior label can use wording such as the following:
“Contains Transmitter Module FCC ID: XYZMODEL1” or “Contains FCC ID:
XYZMODEL1.” Any similar wording that expresses the same meaning may be
used. The Grantee may either provide such a label, an example of which
must be included in the application for equipment authorization, or,
must provide adequate instructions along with the module which explain
this requirement. In the latter case, a copy of these instructions must
be included in the application for equipment authorization.
(B) If the modular transmitter uses an electronic display of the FCC
identification number, the information must be readily accessible and
visible on the modular transmitter or on the device in which it is
installed. If the module is installed inside another device, then the
outside of the device into which the module is installed must display a
label referring to the enclosed module. This exterior label can use
wording such as the following: “Contains FCC certified transmitter
module(s).” Any similar wording that expresses the same meaning may be
used. The user manual must include instructions on how to access the
electronic display. A copy of these instructions must be included in
the application for equipment authorization.
(vii) The modular transmitter must comply with any specific rules or
operating requirements that ordinarily apply to a complete transmitter
and the manufacturer must provide adequate instructions along with the
module to explain any such requirements. A copy of these instructions
must be included in the application for equipment authorization.
(viii) 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. Applications for equipment authorization of modular
transmitters under this section must contain a statement confirming
compliance with these requirements. The modular transmitter must comply
with any applicable RF exposure requirements in its final
configuration. Technical information showing the basis for this
statement must be submitted to the Commission upon request.
(2) Split modular transmitters must meet the requirements in paragraph
(a)(1) of this section, excluding paragraphs (a)(1)(i) and (a)(1)(v),
and the following additional requirements to obtain a modular
(i) Only the radio front end must be shielded. The physical crystal and
tuning capacitors may be located external to the shielded radio
elements. The interface between the split sections of the modular
system must be digital with a minimum signaling amplitude of 150 mV
(ii) Control information and other data may be exchanged between the
transmitter control elements and radio front end.
(iii) The sections of a split modular transmitter must be tested
installed in a host device(s) similar to that which is representative
of the platform(s) intended for use.
(iv) Manufacturers must ensure that only transmitter control elements
and radio front end components that have been approved together are
capable of operating together. The transmitter module must not operate
unless it has verified that the installed transmitter control elements
and radio front end have been authorized together. Manufacturers may
use means including, but not limited to, coding in hardware and
electronic signatures in software to meet these requirements, and must
describe the methods in their application for equipment authorization.
(b) A limited modular approval may be granted for single or split
modular transmitters that do not comply with all of the above
requirements, e.g., shielding, minimum signaling amplitude, buffered
modulation/data inputs, or power supply regulation, if the manufacturer
can demonstrate by alternative means in the application for equipment
authorization that the modular transmitter meets all the applicable
part 15 requirements under the operating conditions in which the
transmitter will be used. Limited modular approval also may be granted
in those instances where compliance with RF exposure rules is
demonstrated only for particular product configurations. The applicant
for certification must state how control of the end product into which
the module will be installed will be maintained such that full
compliance of the end product is always ensured.
[ 72 FR 28893 , May 23, 2007, as amended at 85 FR 18149 , Apr. 1, 2020]
Goto Section: 15.211 | 15.213
Goto Year: 2020 |
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