The GPS14x series is a 1 to 4 RF Splitter for 1550-1615Mhz (GNSS L1) frequencies that can power an upstream GNSS antenna and be powered by downstream ports and/or a USB Aux input. They are built around high quality RF splitter ICs from Mini-Circuits. The GPS14x series support power inputs from any or all of the downstream ports and/or an auxiliary USB port. All RF inputs are DC blocked from each other allowing some ports to be powered and others not. The splitter requires power on at least 1 input but any or all combinations of inputs are supported at once.