I was sitting in a Starbuck’s when I got a call telling me we were off the air this morning. When I got up there and walked in the room I was greeted with the sweet sounds of a transmitter that was making high voltage, this told me that the tube was running normally so I knew that was okay. Next I saw there was no RF power and the GUI display was showing a fault with the exciter. That was strange, it’s our new exciter, why would it go into a fault mode? There are on reset buttons on the exciter’s front panel and none in it’s menu, so how do I reset the fault? Then I realized that I can reset the fault in the transmitter’s GUI interface. So I did and power came right back up to 100%.
But why did it trip off? A little while later I was doing some wiring checks in the back of
the racks when I pulled the ASI cable out of the back of the Mux. It was only for a few seconds but I heard a click over at the transmitter and, yes, we were off the air again with an Exciter fault. So a loss of the Transport Stream (ASI) will result in a fault that causes the transmitter to try and switch exciters. If I had had those new/used exciter’s in place we would have just switched from exciter 1 to exciter 2. But since I have not had time to put in the backup exciter there was nothing to switch to. So we went off the air.
I waited around and kept myself busy to make sure nothing else was going to happen and then went back to Starbucks.