During troubleshooting effort on N3749D this was noted, you can see there is a solder bridge in the center conductor. This connector goes straight into the antenna. We initially verified the short. After which we took off the radome and moved the cable. Using the multimeter, the short was coming in and out. That is when we inspected the cable. I checked the forward voltage on the antenna and it was fine. Next step is to replace/fix the cable.