The DTF-4A-1250 from Crane Aerospace & Electronics is a RF Mixer with RF Frequency 1 to 3500 MHz, LO Frequency 1 to 3500 MHz, IF Frequency DC to 1000 MHz, Conversion Loss 6.5 to 9.5 dB, LO Drive - Power 15 dBm. Tags: Flatpack, Double Balanced Mixer, Passive Mixer. More details for DTF-4A-1250 can be seen below.