UHF FM receiver module has signal indicator

A UHF FM receiver module with RSSI for simple implementation of wireless data links is an updated Radiometrix RX2 but replaces the carrier detect with a received signal strength indicator.

The new RX2A, just launched by low power radio expert Radiometrix, is a miniature PCB mounting UHF radio data receiver.

This is an updated version of the existing Radiometrix RX2 but replaces the carrier detect with a received signal strength indicator (RSSI) which helps range testing, estimating distance from transmitter and identifying weak signal/null spot areas to switch between antenna in fixed installation.

The new device has been designed to allow the simple implementation of data links at speeds up to 64kB/s over distances to 75m in-buildings, or 300m over open ground.

The RX2A is available for operation at 433.92MHz or 434.42MHz in the UK and Europe, and combines full screening with internal filtering to ensure EMC compliance.

The module suits one-to-one and multi-node wireless links in many applications including building security and automation, EPOS and inventory tracking, remote industrial process monitoring and computer networking.

Because of the RX2A's small size and low power requirements, it is also ideal for use with portable, battery-powered applications such as hand-held terminals.

Radiometrix's RX2A data receiver features data rates up to 64kB/s.

A single conversion FM superhet is used with SAW front-end filter, giving >50dB image rejection.

A built-in regulator gives improved stability and supply noise rejection.

Operation of the RX2A is from 2.7V to 16V at 12mA with -101dBm sensitivity at 1ppm BER (64kb/s version) and -108dBm sensitivity at 1ppm BER (10kB/s version).

The RSSI output has a 60dB range and the device boasts an extremely low LO leakage of <-100dBm.

An in-built regulator delivers a constant 2.8V to the module circuitry when the external supply voltage is 2.85V or greater, with 40dB or more of supply ripple rejection.

This ensures constant performance up to the maximum permitted supply rail and removes the need for external supply decoupling except where the supply rail is extremely poor.

Radiometrix's RX2A module can be mounted vertically or bent horizontal to the motherboard.

It can also be potted if required.

Like other Radiometrix products, it complies with harmonised radio standard EN 300 220-3 and harmonised EMC standard EN 301 489-3.

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