The MDM540 from R & K Company Limited is a RF Mixer with LO Frequency 1 MHz to 1 GHz, IF Frequency DC to 1 GHz, Conversion Loss 7 to 10.5 dB, LO Drive - Power 10 dBm, P1dB 4 dBm. Tags: Drop-In, Double Balanced Mixer. More details for MDM540 can be seen below.