The GBDKA1720 from GeoSat Microwave is a Low Noise Block with Input RF Frequency 17.2 to 20.2 GHz, Output RF Frequency 950 MHz to 1.95 GHz, LO Frequency 16.25 to 18.25 GHz, LO Stability ±10 to 25 kHz, Gain 25 to 35 dB. More details for GBDKA1720 can be seen below.