Integration Manual

Digitrax RF28 Integration Manual: October 21, 2019
The RF28 RF module embodies an Atmel/Microchip Inc. AT86RF233 Zigbee/IEEE 802.15.4
type Transceiver MMIC, with a 12pin connector module plug-in digital control interface.
The Host control driver firmware is configured for 47CFR15.212 Modular Transmitter
Certification, and RF operations in the Band 2.405 to 2.480 GHz under 47CFR Part15.247,
and is provided by Digitrax Inc. Panama City FL.
Transmit power levels are configured to meet 15.247,15.205 and 15.209 frequency and
emission limits, and in operation these may not exceed those measured in the FCC Report
submission for 47CFR15.212 Modular Transmitter Certification.
The RF28 employs two orthgonal integral Surface Mounted Space-Diversity sequential
transmit/receive ceramic-chip Johanson 2450AT18B100E antennas. These are typically
0dBi gain, are fixed by the RF28 module OEM manufacturer, and are not user or integrator
modifiable. This configuration inherently meets the antenna requirements of 15.203. There
are no post-manufacturing modifiable or serviceable parts in the RF28.
The RF28 modules measure 30x18x3mm maximum external dimensions and are identified
with the indelible marking: “FCC#: LV3RF28” on the component side of the SMT module
assembly. Due to limited space, the Regulatory information requirements are included
below, and must be included in the final product manual.
The RF28 is tested for 15.212 certification external to a Digitrax UR93 Host controller that
is configured for the generation of the test signals and modes required for certification
testing. Switches on the UR93 allow test lab step-changing of; channel, modulation rate
and TX/RX modes as required, and visible on test equipment. This FCC testing portion of
host firmware driver is not used or enabled in normal operation of the UR93 host unit, but
the channel and power levels remain in effect as for certification requirements and final
product operations.
Integration of this RF28 47CFR15.212 Modular Certified Transmitter into a final Host
product mandates that this final product then be tested as properly conforming to FCC
requirements. RF exposure in the final product meets the requirements stated below.
Regulatory Information: (must be included in final Host product manual)
FCC: Contains FCC Module ID: LV3RF28
Declaration of Conformity:
“This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.”
“This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the