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T433E
433.920MHz ASK Radio Data Transmitter
Features
• Transmits ASK digital data
• Baud rates 300 - 4800bps
• Long range - 1km
• Low cost, small size, wide operating voltage, low current consumption
Applications
• Telecommand Systems
• Security Systems
• Alarms
• Radio Data Communications
• Commercial / Industrial Telemetry
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T433
Transmitter PCB Assembly, No Case |
This product is Obsolete and is Replaced by the GLT4330112E, GLT4330212E, GLT4330412E, GLT4330812E, GLT433xx12NC |
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 Download Datasheet
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Description
The T433E is a radio data transmitter to transmit ASK digital data. Baud rates of 300 to 4800 bps can be transmitted to an operating range of 1 Kilometres in line of sight. The low cost, small size, wide operating voltage combined with low current consumption makes it ideal for various applications.
The transmitter is available with a plastic case or as a Printed Circuit Board assembly. The Printed Circuit Board assembly allows OEM manufactures to integrate the transmitter with their own products.
Technical Data
| Power Source |
6.0 - 28 VDC |
| Current Consumption |
25mA at 12VDC supply (only when transmitting)
3.3mA at standby |
| Operating Freq |
433.920MHz |
| Crystal Used |
48.213MHz, 3rd Overtone, 20pf, 30ppm at 0-50°C |
| Operating Temperature Range |
-5 to 50°C |
| RF Power Output |
2mW ±3dB into 50 ohms load |
| ASK Data Input |
0VDC is transmitting
5VDC is not transmitting |
| Frequency Response |
40Hz to 2400Hz |
| Baud Rate |
150 - 4800bps |
| Antenna |
50 ohms, 433.920MHz Antenna (ANT433S) or piece of approximately 70cm of wire |
| Type of Emission |
Amplitude Shift Keying (ASK) |
| Spurious Transmission |
To meet IETS 300 200 : 1993 |
| Dimension |
115 x 80 x 58mm excluding Antenna & mounting bracket |
| Weight |
200g excluding Antenna & mounting bracket |
| Mounting Bracket |
Brass bracket suitable to clamp onto Antenna pole |
| Usable Receiver |
R433E Data Receiver |
| Useable Operating Range |
Up to 1km line of sight |
Dimensions
T433E 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 T433E transmitter and R433E receiver.
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