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FCC Part 15 Radio Frequency Devices
Section 15.212

The Federal Communications Commission (FCC) is the authority in the United States of America that creates and enforces the use of airwaves throughout the entire radio frequency spectrum. This group of documents contains the entirety of the FCC Part 15 regulations that concern unlicensed radio frequency devices. As with all government documents, this material is in the public domain and may be freely copied so long as the content is not changed. This copy is provided as a convenience for RF Cafe visitors. 

Click here for the Table of Contents.

   
[Code of Federal Regulations]
[Title 47, Volume 1]
[Revised as of October 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR15.212]
[Page 806-808]
 
                       TITLE 47--TELECOMMUNICATION
 
              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION
 
PART 15_RADIO FREQUENCY DEVICES--Table of Contents
 
                     Subpart C_Intentional Radiators
 
Sec. 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 section.
    (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 over-modulation.
    (iii) The modular transmitter must have its own power supply 
regulation.
    (iv) The modular transmitter must comply with the antenna and 
transmission system requirements of Sec. Sec. 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 Sec. 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 Sec. 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 Sec. 
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
[[Page 807]]
 
unmodified and commercially available (see Sec. 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 identification number.
    (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) The modular transmitter must comply with any applicable RF 
exposure requirements in its final configuration.
    (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 
transmitter approval.
    (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 peak-to-
peak.
    (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
[[Page 808]]
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]



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