So I just bought 7 Aja Model HA5 HDMI to HD SDI Converters to interface 7 gopros to my SDI Switcher which needs 1080i for it to work. 2 of my converters are outputting 1080i and work fine through the switcher. The other 5 are outputting 1080p and not working. Why is this happening? Any help would be awesome. Thanks.