is it a city talk?
I explain with city talk:
7745 CHANNEL FAILURE RATE ABOVE DEFINED THRESHOLD
01 00 00 00 00 00 01 00 00 05 02 20d
20D is a pourcent of failure.
20 is not very important. When you have 70D or more it is a really problem.
7745 + 7743, I think you have a problem on the feeder link or TRX is begin to broken. (LNA, antenna, water on câble, …)
You can test TRX on loop test. selected both separetly.
IF rx path1 is different of Rx path2 (>4) change your TRX.