sivantor RFM003 RF Module 3 Instruction Manual
- June 6, 2024
- sivantor
Table of Contents
Integration manual
for RF Module 3 (RFM003)
The “RFM003” radio module contains two radio transceivers running at 3.27 MHz
and 2.45 GHz which are implemented in a single hardware platform.
The 3.27 MHz radio consists of a nearfield inductive magnetic transceiver. It
uses a time-division duplex and runs on a single channel with phase
modulation. The signal is transmitted by a coil antenna. The intended use of
this radio is to exchange data between two hearing aids or to communicate with
a proprietary accessory.
The 2.45 GHz radio is mainly used for Bluetooth® Low Energy Radio
communication. In addition to that, the receiver is also capable of
proprietary communication modes. The transceiver is connected to a PCB-
integrated antenna. The intended use of this radio is to exchange data between
hearing aids and Bluetooth accessories.
The main part of the module is a set of analog and digital ASICs which contain
both radios. These ASICs are mounted on a flex PCB. In addition to that, the
module comprises the coil antenna for the nearfield inductive magnetic system,
one crystal, and EEPROM memory. The antenna for the 2.45 GHz radio is
integrated into the flex PCB of the module. The matching circuitry between the
radio ASIC and the antenna is also on the flex PCB.
On the flex PCB, additional components are mounted and connected to the radio
module. These include microphones, the connector to the external speaker, push
buttons, the telecoil, and the battery connector. The system is powered by a
lithium-ion battery, all necessary voltage regulators are included in the
module.
The PCB with the module and all other components of the hearing aid is
arranged in a plastic frame that is not user-serviceable or user-modifiable.
The outer housing may be replaced by field service, but this is not relevant
for the wireless module.
The module is thus not installed but instead assembled at the same time as the
host is. The position of components and interconnection through the PCB is
decided during the project phase for the different hosts and follows the best
practice of the engineering team in order to assure an optimal integration of
the module.
Several validation steps are done through the development to assure full
compliance with all the regulatory requirements.
The user guide must contain the HVIN, the FCC ID, and the IC ID:
HVIN: RFM003
Contains FCC ID: 2AXDT-RFM003
Contains IC ID: 26428-RFM003 and the following statements:
This Class B digital apparatus complies with Canadian ICES003. Changes or
modifications made to this equipment not expressly approved by the legal
manufacturer may void the FCC authorization to operate this equipment. This
device complies with Part 15 of the FCC Rules and with ISED’s license-exempt
RSS.
Operation is subject to the following conditions:
- this device may not cause harmful interference, and
- 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 instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
The radiated output power of the device is far below the FCC and ISED radio frequency exposure limits.
For body-worn operation, this device has been tested and meets the FCC RF exposure guidelines when used with the legal manufacturer’s accessories supplied or designated for this product. The use of other accessories may not ensure compliance with FCC RF exposure guidelines.