R433E

ELSEMA 433.920MHz ASK Radio Data Receiver , R433E R433E 433.920 MHz ASK RADIO DATA RECEIVER Features • Receives digital data • Baud rates 300 - 4800bps • Low cost, small size, low current consumption Application • Telecommand Systems • Security Systems • Alarms • Radio Data Communications • Commercial / Industrial Telemetry Description The R433E is a radio data receiver to receive digital data. Baud rates of 300 to 4800 bps can be received. The low cost, small size, wide operating voltage combined with low current consumption makes it ideal for various applications. The receiver is available with a plastic case or as a Printed Circuit Board assembly only The PCB assembly only is called R433. The Printed Circuit Board assembly allows OEM manufactures to integrate the receiver with their own products. R433 Technical Data Supply Voltage Current Consumption Receiver Type Receiving Freq Oscillation System Operating Temperature Range IF Freq Selectivity Sensitivity Type of Demodulation Baud Rate Data Output Level Frequency Response 8.0 to 28.0 Volts DC. 14mA Single Conversion Superheterodyne 433.920MHz VCO with 10ppm Crystal Controlled reference Oscillator -5 to 50°C 320KHz -3dB at ±20kHz Better than -107dBm or 1µV Amplitude Shift Keying. (ASK) 300 to 4800 bps with 50% duty cycle 0-5V 150 to 2400 Hz with 50% duty cycle (Other duty cycles ELSEMA 433.920MHz ASK Radio Data Receiver , R433E will degrade sensitivity) Connections Mounting Bracket Dimension Weight Usable Transmitter Antenna Supply & Data Out: 3- way screw type terminal block (R433 without case); 4-pole Mic socket (R433E with case). Brass bracket suitable to clamp onto Antenna pole 115 x 80 x 58mm excluding Antenna & mounting bracket 200g excluding Antenna & mounting bracket T433 Data Transmitter 50 ohms, 433MHz Antenna R433E Data Format It is important to input the correct data format otherwise the receiver will have a lower sensitivity which will result in a reduced transmission range. The R433E receiver data slicer is set for 50/50-duty cycle, therefore the “data in” should have a 50/50-duty cycle. The 50/50-duty cycle data can be pulse-width modulated to transmit resets, 0's or 1's. See diagram below : A 50/50-duty cycle will have an average DC signal resulting in a constant reference for the data slicer. Users should use pulse-width modulation to transmit data with logic 1's or 0's. If a different duty cycle is used, for example 66/33 ( Manchester format) the data slicer in the receiver will try to adjust itself to the average DC signal. Since this average DC signal is changing with different data bits this will result in a constantly changing reference for the data slicer, resulting in lower sensitivity. See diagram below : *Only 50/50 duty cycle data is suitable for the T433 transmitter and R433 receiver. Manufactured by Elsema Pty Ltd 3/10 Hume Rd, Smithfield NSW 2164 Ph: 02 9609 4668 Fax: 02 9725 2663 Website: http://www.elsema.com