The firmware update was an attempt to solve the drop out problem. We've had these mics for about 4 years and have never been updated.
With all the transmitters off, some of the receivers have 4 or 5 red bars and some just have 1 or 2 red bars.
The singers line up across the stage but move around dancing a lot. There are 6 or 7 singers at most, the closest to the antenna is about 3 feet and the one in center stage are about 15 feet from either antenna.
One cable is 50' long but the antenna is about 10 feet away from the receivers which are in a rack. The other cable is 100' and the antenna is about 20' from the receivers rack. I think it's 50 ohm cable, I remember making sure we got the right ohms cable because we had to send one cable back, because it was wrong. I've tried the all gain settings on the paddles.
How high should I place the paddles? Also, on both sides of the stage, there are laptops near the paddles and there are other mic receivers (Shure and Senhieser) on top of and below the receiver rack.