The bad/not updated ESD table (ver. 31) was sending incorrect Tx frequency to the 2Ku system. As result the Tx antenna was set to transmit at 14083MHz instead of 14303MHz. Because of the large frequency difference the Tx signal was with about 5dB lower than expected value and the system had marginal performance. Once we got and loaded a new ESD table all worked well. At first it was referred to as version "n" and upon loading it showed as version 32.