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
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