The IDX DC-DC Cable for Sony PMW-EX1/EX3 Camcorders is a D-tap coupler cable that is designed for use with Sony PMW-EX1 and EX3 series camcorders.
You must combine the DC-DC cable with the IDX P-V284 Endura V-Mount plate with 2-pin D-Tap DC out and Digi-View; IDX A-CA74E shoulder mount is optional.