OPERATION GUIDE
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OG_STD-502-R_v09e
Circuit Design, Inc.
2
1. Outline
The STD-502-R operates in the 2.4 GHz band available worldwide. Designed to be embedded in
equipment, this radio transceiver module was developed for industrial applications that require stable
and reliable operation. With battery operation, it achieves line of sight radio communication beyond
300 m.
Besides using highly noise-resistant direct-sequence spread spectrum (DSSS) modulation, the
module has a true diversity receiver function for preventing signal dropout due to multipath fading.
This ensures highly stable and reliable radio communication in the congested 2.4. GHz ISM band.
The transceiver uses a transparent input/output interface, enabling users to use their own protocols.
In addition, the transceiver can transmit data that includes long consecutive identical bits that cannot
be transmitted with conventional radio modules.
2. Features and applications
Features
Direct sequence spectrum (DSSS)
True diversity receiving
Communication range 300 m (LOS)
Low power operation 10 mW, 3.3 V, 68 mA
Data rate 19.2 kbps
Built-in data frame coincidence detection function
Operating temperature range -20 to +65°C
Compliance with European EN300 440, American FCC Part 15.247, and Japan ARIBSTD-T-66
regulations
Applications
Remote control of industrial equipment
Industrial telemetry and monitoring systems
