Radiometrix has launched a highly compact transmitter module with a range of typically over 5 km when paired with a suitable receiver. The new HMT2 transmitter is a multi-channel, narrowband design, suitable for use in many high-power licensed and unlicensed UHF allocations worldwide.
Within a compact 66 x 23 x 9 mm package, the module offers a 500 mW RF output in the 458 MHz and 433 MHz bands. The operating channel frequency is pin selectable – the HMT2 offers 16 parallel and 32 serial channels at frequencies between 458,525 and 459,1 MHz. The module draws just 350 mA in transmit mode and less than 5 µA on standby. It offers a data rate of 5 Kbps and a DC – 3 kHz analog interface for the standard module.
The HMT2 is fully shielded, enjoying high immunity to external interference, and conforms to ETSI EN 300 220-2 (radio) and EN 301 489-3 (EMC) standards. It is a PLL synthesised transmitter clocked by a VCTCXO.
With its compact size and low power consumption, the HMT2 is ideal for battery powered applications like handheld terminals, on-site paging systems, lone worker alarm, security and fire alarms. Radiometrix also anticipates that the long range of the module will make it popular for data loggers, industrial telemetry and remote control systems, and for vehicle data upload / download.
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