The QM3040A from Polyphase Microwave is a Modulator with RF Frequency 3 to 4 GHz, RF Frequency 3 to 4 GHz, LO Frequency 3 to 4 GHz, Conversion Loss 6.5 to 8.5 dB, P1dB 7 dBm (Input). Tags: Module with Connectors. More details for QM3040A can be seen below.