The STD-502-R operates in the globally available 2.4 GHz band. Designed for integration into equipment, this radio transceiver module was developed for industrial applications requiring stable and reliable operation. Battery-powered, it achieves a radio communication range exceeding 300 m.
In addition to utilizing highly noise-resistant Direct-Sequence Spread Spectrum (DSFS) modulation, the module features a true diversity receiver function to prevent signal loss due to multipath fading. This ensures very stable and reliable radio communication in the congested 2.4 GHz ISM band.

These key features are incorporated into a new, patented ASIC (Application-Specific Integrated Circuit) design. Using the ASIC allows the product to be supplied long-term without relying on RFICs.
The transmitter utilizes a transparent input/output interface, enabling users to employ their own protocols. Furthermore, the transceiver can transmit data that includes long, consecutive, identical bits that cannot be transmitted with conventional radio modules.

In addition to the STD-502-R, Circuit Design's product line includes the STD-302N-R industrial-grade transceiver that covers 300 MHz to 1.2 GHz, providing worldwide coverage of the ISM bands.

Samples will be available starting in January 2013. Production is scheduled to begin in May 2013.


The technical features and applications of the STD-502-R are as follows:

Technical Features
- Direct Sequence Spread Spectrum (DSSS)
- True Diversity Reception
- 300 m Communication Range (LOS)
- Low Power Operation 10 mW 3.3 V 68 mA
- Data Rate 9.6 kbps / 19.2 kbps
- Match Detection Function Integrated into the Data Environment
- Operating Temperature Range -20 to +65 °C
- Compliant with European Standard EN 300 440, American FCC Part 15.247, and Japanese ARIB STDT66

Applications
- Remote Control of Industrial Equipment
- Industrial Tracking and Telemetry Systems

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