Check the CAM HDMI output settings, the resolution should be set as 1080p/1080i; HDMI information Display should be OFF and HDMI control should be OFF.

Check the HDMI cable, Please connect the CAM with Monitor through the HDMI cable to check whether the outputing is correct or not?

Please connect transmitter with computer through HDMI cable to check whether the transmitter could display the correct video format?