OPERATION GUIDE UHF Narrow band radio data module CDP-TX/RX-02E-R 457 MHz Operation Guide Version 1.1 (May.2008) CIRCUIT DESIGN, INC., 7557-1 Hotaka, Azumino-city Nagano 399-8303 JAPAN Tel: + +81-(0)263-82-1024 Fax: + +81-(0)263-82-1016 e-mail: info@circuitdesign.jp http://www.cdt21.
OPERATION GUIDE. CONTENTS FEATURES & APPLICATIONS ......................................................................... 3 GENERAL DESCRIPTION................................................................................ 3 SPECIFICATIONS ............................................................................................ 4 PIN DESCRIPTION........................................................................................... 7 CHANNEL AND FREQUENCY SETTING..................................
OPERATION GUIDE. GENERAL DESCRIPTION & FEATURES Features FCC Part 90.
OPERATION GUIDE. SPECIFICATIONS General specification * The MIN/TYP/MAX values for the RF output power and BER are specified in the range of operating temperature. * All values in the specification column are measured and specified with 50 ohm terminal and at 25 °C +/- 10 °C unless otherwise noted. Item Unit Reference Remarks MIN TYP MAX FCC Part 90.217 (TX) FCC Part 15 (RX) Communication method Operating frequency range Specification One-way 457.
OPERATION GUIDE. Transmitter Item Specification Remarks MIN TYP MAX 10 at 457.6 MHz 7 10 13 RF output power ( 10 mW) mW RF output power ( 10 mW) mW RF output power ( 1 mW) mW Deviation kHz ± 2.1 DI input level for Lo V L=GND 0 0.4 DI input level for Hi V Hi=3V 3 5.5 Over all frequency range and operating temp. range PN9 2400bps / LPF=20k 4 16 0.3 1 2.6 ± 1.6 ± 2.1 ± 2.6 TX carrier start up ms 50 From power on to f ± 1.
OPERATION GUIDE. NOTICE * Communication range depends on the operation environment and ambient surrounding. * For improvement, specifications are subject to change without prior notice. * Antenna connection of receiver CDP-RX-02E-R is designed as pin connection. Sensitivity, spurious emission and unwanted radiation levels may vary with the pattern used between the RF pin and the coaxial connection. Please make sure to verify those parameters before use.
OPERATION GUIDE. PIN DESCRIPTION CDP-TX-02E-R Pin name I/O ANT O RF output terminal Antenna impedance nominal 50 Ω I The ground for the power supply. Connect it to the ground plane as well as to the bottom part of the case. The ground plane has an impact on the range and the stability of operation. VCC I The power supply terminal. The supply voltage is DC 3.0 to 12 V. Power supply noise and ripple have an impact on performance, so eliminate them as far as possible with filters and capacitors.
OPERATION GUIDE. CDP-RX-02E-R Pin name I/O ANT O RF input terminal Antenna impedance nominal 50 Ω I The ground for the power supply. Connect it to the ground plane as well as to the bottom part of the case. The ground plane has an impact on the range and the stability of operation. I The power supply terminal. The supply voltage is DC 3.0 to 12 V. Power supply noise and ripple have an impact on performance, so eliminate them as far as possible with filters and capacitors.
OPERATION GUIDE. CHANNEL AND FREQUENCY SETTINGS By use of a chip mounted 4-bit switch or pins and a jumper on the PCB, you can select easily between the 32 channels. The 32 channels are divided into 2 groups: Group A and Group B. Each group of channels can be selected by soldering the jumper ON or OFF. When the jumper (JP2) is ON, Group A is selected. When the jumper is OFF, Group B is selected. There are 16 channels in each group and they can easily be selected using the 4-bit switch.
OPERATION GUIDE. ANTENNAS The most important factors for safe data transmission are a good antenna and RF grounding, both for the transmitter and the receiver. Without an antenna it is impossible to transmit data over a long distance. The standard antenna is a Lambda/4 wire protected by a plastic cover. The receiver has a simple antenna input pin. Any suitable UHF antenna can be connected to it.
OPERATION GUIDE. BLOCK DIAGRAM OG_CDP-02E-R-457M_v11e 11 Circuit Design, Inc.
OPERATION GUIDE. OG_CDP-02E-R-457M_v11e 12 Circuit Design, Inc.
OPERATION GUIDE. DIMENSIONS OG_CDP-02E-R-457M_v11e 13 Circuit Design, Inc.
OPERATION GUIDE. OG_CDP-02E-R-457M_v11e 14 Circuit Design, Inc.
OPERATION GUIDE TEST DATA RSSI output 700 600 RSSI (mV) 500 400 300 200 100 0 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 RF level (dBm) OG_CDP-02E-R-457M_v11e 15 Circuit Design, Inc.
OPERATION GUIDE Regulatory compliance information CDP-RX-02E-R 457 MHz 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.
OPERATION GUIDE Cautions • As the radio module communicates using electronic radio waves, there are cases where transmission will be temporarily cut off due to the surrounding environment and method of usage. The manufacturer is exempt from all responsibility relating to resulting harm to personnel or equipment and other secondary damage. • Do not use the equipment within the vicinity of devices that may malfunction as a result of electronic radio waves from the radio module.
OPERATION GUIDE REVISION HISTORY Version 1.1 Date May. 2008 OG_CDP-02E-R-457M_v11e Description CDP-TX/RX-02E-R 457MHz The first issue 18 Remark Circuit Design, Inc.
OPERATION GUIDE Application note (Design guide for RF transmitter and receiver) The following problems generally apply to radio modules Problem Touching or moving the antenna changes its impedance, which causes variations in emission power. The variation appears as distortion in the modulating signal and causes communication errors. If a change in the circuit length occurs due to the on/off of switch etc.
OPERATION GUIDE A PCB example built for CDP-TX-02E-R taking into consideration the above points is shown below. Model No. RPB-T02N-1 Circuit Design, Inc. All rights reserved. No part of this document may be copied or distributed in part or in whole without the prior written consent of Circuit Design, Inc. OG_CDP-02E-R-457M_v11e 20 Circuit Design, Inc.
