The SM4B (M4B) is a double balanced mixer, designed for use in military, commercial, and test equipment applications. The design utilizes Schottky ring quad diodes and broadband ferrite baluns to attain excellent performance. This mixer can also be used as a phase
detector and/or bi-phase modulator since the IF port is DC coupled
to the diodes. Environmental screening is available to MILSTD-883,
MIL-STD-202, or MIL-DTL-28837, consult factory.