The DN2-9813-4-1K from Narda-MITEQ is a Block Downconverter with Input RF Frequency 17.7 to 21.2 GHz, Output RF Frequency 70 MHz, LO Stability ±0.25 dB(Level stability), P1dB 20 dBm, Gain 43 to 61 dB. More details for DN2-9813-4-1K can be seen below.