It is also important that the initial setup of the RF path is done correctly. The sub-reflector must be positioned correctly for the front end being used. The LO system must be set up properly with the proper synthesizer set to the correct frequency. The receiver must be cold. With these conditions met the converter levels, LCP and RCP, are adjusted for the proper level of -41 dBM as measured at the test port on the front of the module using a power meter.
Several factors vary from band to band.
One example would be inter- ference present. Another would be an IF that is not a full 500 MHz wide. In order to work around these factors, it is important to know they exist. The ideal IF band pass. Interference in the band pass contributing to the average power level.