User's Guide

(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 §§ 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 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