™ ™ Small Receiver Transmitter Module RFM307 Radio Transceiver Description V1.0 Draft 29 April 11:11 ©2009 Cervis, Inc.
Small Receiver Transmitter Module RFM307 This document is the property of Cervis, Inc. and cannot be copied, modified, e-mailed, or reproduced without the express prior written consent of Cervis, Inc. Cervis, Inc. reserves the right to change this manual or edit, delete, or modify any information without prior notification. Cervis, Inc. 170 Thorn Hill Road Warrendale, PA 15086 Phone: 724.741.9000 Fax: 724.741.9001 Visit our Web site at: www.cervisinc.com © 2009 Cervis, Inc. All rights reserved.
Radio Transceiver Description v1.0 Table of Contents Table of Contents.......................................................................................................................... i List of Figures ............................................................................................................................... i This page intentionally blank...................................................................................................... ii 1.0 Introduction ..................
Small Receiver Transmitter Module RFM307 This page intentionally blank.
Radio Transceiver Description v1.0 1.0 Introduction This document describes in detail the implementation of the RFM307 transceiver module used in the SmaRT product line. It is assumed that the reader has some hardware and software background related to microprocessor based embedded systems.
Small Receiver Transmitter Module RFM307 2.0 General Description The RFM307 transceiver module provides wireless communication functions in a general purpose module that is incorporated into various control system products typically covered by FCC Part 15.212, configured as split systems. The module is composed of a single shielded printed circuit board (PCB) assembly.
Radio Transceiver Description v1.0 3.0 Transceiver Block Diagrams Figure 1. Block Diagram of RFM307, no pa lna Figure 2. Block Diagram Atmel AT86RF230 Transceiver (from data sheet) ©2009 Cervis, Inc.
Small Receiver Transmitter Module RFM307 The RFIC utilized in the RFM307 is AT86RF230, manufactured by Atmel. The RFIC is a “low-power 2.4 GHz radio transceiver especially designed for ZigBee/IEEE 802.15.4 applications” according to the AT86RF230 Data Sheet. Most, if not all, subsequent information is derived from the AT86RF230 Data Sheet. The transceiver IC is capable of operating in the frequency range of 2405MHz to 2480MHz, divided into 16 predefined channels.
Radio Transceiver Description v1.0 4.0 Transceiver Theory of Operation 4.1 Power Supply The RFM307 requires DC power from external regulated sources provided by the host application hardware. The RFIC is internally divided into digital and analog sections, each provided with an internal linear DC regulator.
Small Receiver Transmitter Module RFM307 4.4 Transmitter Function (From the AT86RF230 Data Sheet) The AT86RF230 transmitter consists of a digital base band processor (TX BBP) and an analog radio front end. The TX BBP reads the frame data from the Frame Buffer and performs the bit-to symbol and symbol-to-chip mapping as specified by IEEE 802.15.4 in section 6.5.2. The O-QPSK modulation signal is generated and fed into the analog radio front end.
Radio Transceiver Description v1.0 5.0 Tune-Up Procedure In general, tune-up of the AT86RF230 is pre-determined in software. Insurance that the radio device is tuned to the correct frequency and adheres to the proper output level is based on the architecture of the transceiver – including the external components - and the limits of the software. No manually variable passive components are used in the design.
Small Receiver Transmitter Module RFM307 6.0 Labels The RFM307 transceiver module and products the incorporate the RFM307 transceiver module must be properly labeled. The RFM307 module must be labeled with the following statement: Cervis SmaRT 2.4GHz Module FCC ID: LOBSRF307 The product label must include the following statement: FCC statements: 15.19 – Two Part Warning This device complies with Part 15 of the FCC rules.
Radio Transceiver Description v1.0 7.0 Specifications RFM307 General Specifications Item Description Digital Power Regulated +2.7 – 3.3 VDC, 20mA max Analog Power Regulated +2.7 – 3.3 VDC, 20mA max Digital I/O Signals “CMOS” logic levels TX RF Power -17.2dBm to +3dBm, +/-3dBm TX RF Power Max. Not to exceed +6dBm Frequency Accuracy 2405-2480 MHz, 5 MHz channel spacing +/-100kHz Modulation DSSS Size 25mm W x 26mm H x 5mm T Connector U.
Small Receiver Transmitter Module RFM307 8.0 Signals and Connections RFM307 Pins and Signals 10 Pin Description 1-16,20,22-24,28,30,31 Ground connection 32 Digital Power input, regulated +2.7 – 3.3 VDC, 20mA max 29 Analog Power input, regulated +2.7 – 3.3 VDC, 20mA max 21 2.
Radio Transceiver Description v1.0 www.cervisinc.com Visit our Web site at: SmaRT devices are manufactured by CERVIS, Inc. © 2009 Cervis, Inc. All rights reserved. Content is subject to change without notice. ©2009 Cervis, Inc.
