The ALS50005 from Acton is a C-Band PLL Low Noise Block that down converts an input frequency of 3400 to 4200 MHz to 950 to 1750 MHz. The LNB provides a conversion gain of 62 dB and has a 1 dB compression point of 5 dB. It is available in a small compact package and requires a supply voltage fo 12-24 V.