DS-303 is a data radio module, adopts double phase-lock loop, double VCO structure, high stability TXCO. With advanced arithmetic fault-rectify system in software design, it has high stability and reliability. This module is usually used for industry control, water conservancy, electric, oil field management, wireless alarm so on. Moreover, we can extend its functions and ODM products for you according to your specific application.
|Design based on the special use of the wireless voice transmission in the industrial automation field
|High stability, good reliability and low power consumption
|Standard connection: RS-232/RS-485/TTL
|Facility for installation and maintenance, Flexible networking configuration, suitable for the field of multiple point but decentralization and complex geography environment
|Metal shell, good shielding performance, providing frequency passage
|Providing many MODEM communication protocols
|To adapt different user structure, we can develop various size modules and offer sufficient technology support for client use the module and second development for free
|Double phase-lock loop, double VCO structure, high stability
|providing many MODEM communication protocols
Carrier frequency: VHF/UHF;
Baud rate: 1200-19200bps
Interface: TTL/RS-232/RS-485 (selection);
Frequency stability: ±2.5ppm;
Channel spacing: 25kHz;
Antenna impedance: 50 ohm;
Supply voltage: 12V;
RF power: 2W
Frequency: 400-470MHz (subdivided)
Frequency deviation: ≥ 5.0kHz
Adjacent channel power: ≥70dB
Transmitting current: ≤1.5A
Receiving sensibility: ≤-119dBm (more than 12dB SINAD)
Adjacent channel selectivity: ≥65dB
Intermodulation rejection: ≥65dB
Clutter and images rejection: ≥70dB
Setting of frequency, interface, and data format
Before using DS-303, users can use our software to setting frequency value, interface rate and data format.
A. Users can program any frequency value in the frequency range. Before ordering, clients need confirm the frequency range.
B. Users can choose the interface rate according to requirement.
C. Users can change the data format individually.
Supported protocol and Transmit capability
DS-303 transceivers offer transparent protocol to support various applications and protocols of users.
If the user needs to decrease his cost or ease the workload of terminal CPU, we can add other specific functions based on the transparent protocol, such as addressing, data acquisition, command interpretation and so on.
Description of Indicator light
a. The red and green lights will keep on about 50Ms when power supply.
b. The red light is normally on when transmitting data, while the red light will crush out after ending the data.
c. The green light is normally on when receiving the air signal, while the green light will crush out after receiving the air signal.