STD-502-R / DSSS low power radio transceiver0 pages

DSSS low power radio transceiver

STD-502-R

2.4GHz

The STD-502-R 2.4 GHz transceiver uses direct sequence spread spectrum (DSSS) modulation and a true diversity circuit, enabling reliable
communications even in the congested 2.4 GHz band.
The STD-502-R complies with the European ETSI EN300440, U.S. FCC Part 15.247, Canada IC RSSS-210 standards and Japanese ARIB
STD-T66 standard, making it ready for the global market.
Low power consumption and battery operation give the STD-502-R the performance demanded for applications where long range and
reliability are required.
The transceiver uses a transparent data interface to enable users to communicate using their own protocols.
The modules can be set easily via the UART interface using dedicated commands.
*Circuit Design developed an onboard ASIC containing SS correlator (a key part of spread spectrum communication) .
This ensures long term supply for industrial applications.

Features
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CE, FCC and IC conformity certification
ARIB STD-T66 compliant
Uses direct sequence spread spectrum (DSSS) modulation
A true diversity receiver with two built-in receiver circuits
Module settings using dedicated commands
Data communication uses a transparent interface
Low power operation
77 channels
Range 300m LOS

Applications
・ Industrial telecontrol
・ Telemetry systems

General

Specification

Frequency range

2402.5 2478.5 MHz

Number of RF channels

77

Channel spacing

1 MHz

RF chip rate

144 k , 288 kcps

Modulation system

FSK

Supply voltage

3.3 5.5 V

Supply current

TX: 65 mA RX: 70 mA

RF output power

10 mW

Receiver sensitivity

-93 dBm

Operating temp. range

-20 + 65 °C (storage -30 〜 +80 °C)

No dew condensation

Dimension

50 x 30 x 9 mm

Not including connectors

Weight

24 g

RF connectors

Interface

Parameter

RP-SMA x 2

Remark

EIRP

Parameter

Specification

Remark

Data interface (DI / DO)

9.6 k / 19.2 kbps

Sync: CLK terminal

Command interface (TXD / RXD)

UART communication (RS232C format)

- Communication method

Asynchronous

- UART bit rate

19200, 38400, 57600 bps

- Flow control

None

- Other parameters

Data length: 8 bits, Parity (None), Stop bits 2
Specifications are subject to change without prior notice

www.circuitdesign.jp

STD-502-R 2.4GHz ver1.4 Oct. 2014

Sales Division

7557-1 Hotaka, Azumino, Nagano 399-8303, Japan
Tel:+81-(0)263-82-1024
Fax:+81-(0)263-82-1016