CDPRX03BS-R 434 LPRS, CDPRX03BS-R 434 Datasheet - Page 4

• Manufacturer Part Number: CDPRX03BS-R 434
• Description: RECEIVER, NARROW BAND, 434MHZ
• Manufacturer: LPRS

Specifications of CDPRX03BS-R 434

• Current Rating: 24mA
• Data Rate: 4800 Bps
• Data Rate Max: 4800bps
• External Depth: 8mm
• External Length / Height: 26mm
• External Width: 36mm
• Frequency: 434.075MHz
• Operating Temperature Max: 55°C
• Operating: RoHS Compliant

CIRCUIT DESIGN, INC.
OPERATION INSTRUCTIONS
Please read these instructions before you start using the CDP-RX-03AS.
The CDP-RX-03AS is designed as a module that will be integrated into a user system. It is not
a ready-made product for private users. It can be regarded more like a special component for
part of an electronic system. The user needs basic knowledge about electronics. Special
knowledge about RF technology is helpful, but the most difficult parts are integrated into the
modules to enable easy operation. Some additional information is given here:
Supply voltage:
The CDP-RX-03AS receiver module contains a voltage regulator to guarantee stable
performance in the given range of supply voltage.
The design was made for operation with a battery. Supply voltage must be used within
specified voltage. The module shows unstable function with the voltage lower than specified.
If the voltage which connected to the Vcc (+) and Ground (-) terminal is beyond the maximum
voltage given in the technical specification or reversed, the module will be permanently
damaged. To enable a low minimum voltage, no internal circuit is used to prevent damage by
incorrect polarity.
If a higher supply voltage is available then a simple diode can be inserted in connection line to
the Vcc terminal to prevent damage by incorrect polarity. The diode must be rated for the
maximum supply current detailed in the technical specifications.
Data format:
Long intervals of HIGH or LOW bits should be avoided. Succeeding bits can be distorted in
their pulse width. If the sequence of HIGH or LOW bits is too long then there is possibility
that the logic level of the data output will change. The maximum pulse width for continuous
High and Low signal is 20msec (96bit) at 4800bps. The minimum pulse width is 208 us.
Maximum data rate is 4800bps.
It will be very helpful to have a 20 bits preamble (1010…) in front of the data to ensure
communication reliability.
In general, at higher data rates (4800 Baud) the internal signal is shaped into a slope and jitter
at the receiver data output increases.
Further advice can be given if the precise format of the data and system requirement is notified
to the dealer or directly to Circuit Design, Inc. Your inquiries and comments are welcome .
Outputs:
At the receiver side 3 output (AF, DATA and RSSI) signals and one control terminal are
available.
AF output is the analog output from the FM detector circuit.
The DATA output is a digital output. This is the signal after AF signal pass through band pass
CDP-RX-03AS UHF Radio Data Module Operation Guide
4