The C-PLL 5.75 U from Swedish Microwave AB is a Low Noise Block with RF/Input Frequency 4.5 to 4.8 GHz, Output Frequency 1250 to 950 MHz (Inverted), LO Frequency 5.75 GHz, Output Power 15 dBm, P1dB 15 dBm. More details for C-PLL 5.75 U can be seen below.