Narrowband VHF Multichannel Transceiver

It is intended as a general purpose VHF unit covering any 3 MHz switching bandwidth specified in the frequency range of 135-175MHz and is capable of supporting data rates of up to 5kbit/s over distances of 1km.

The synthesiser-based module shares a common pin out and features with the company’s popular UHF TR2M product offering. Like the TR2M, it offers RF designers an analogue and digital interface with a transmit power of +20dBm (100mW) and a receiver sensitivity of -118dBm (for 12dB SINAD).

The TR1M is powered from a supply of between 4.5 and 16V, with a frugal current consumption of 110mA for the transmitter (100mW output), and 27mA for the receiver.

The module is fully compliant with both ETSI EN 300 220-3 and EN 301 489-3 standards, and has an operating temperature range of between -20 and +60°C. It can be utilised in handheld terminals, heavy vehicle/machine remote controls, environmental monitoring, data loggers, industrial telemetry/telecommand, and high-end security/fire alarm designs.