This unit is a filtered preamp designed to go between a radio transceiver and an antenna which gives excellent performance gains for reception and bypasses the preamplification circuit when a transmission is detected.
Power is either via bias tee or a USB-C cable (not included).. Bias-tee voltage input is 5V.
Using a SAW bandpass filter and a low noise amplifier (LNA), it stops out-of-band intermodulation while providing additional gain for increased sensitivity. The LNA is before the SAW filter. These particular models are tuned for use with frequencies centred on 868MHz(usable 863-876MHz) or 915MHz (893MHz-935MHz). The LNA provides around 15dB of gain at 868/915MHz.
SMA female connectors are fitted for antenna input and radio output, a blue power indicator is provided which switches to red to indicate the unit is in bypass mode.
Max TX power +15dBm (30mW). TX detection threshold -5dBm (+/-2dBm). Originally designed to support a demand within the Helium cryptomining scene.
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