how does it receive C Band transmissions, which are at 4,000 MHz?
Ans: Yes, C Band transmissions are at 4 GHz and are received by the LNB at this frequency. The LNB down converts these transmissions to a range of Intermediate Frequencies (IF) that span from 950 MHz to 2150 MHz. It is these range of IF frequencies that are fed into the Receiver. Incidentally, both C band Ku Band receivers employ the same IF frequency range. Hence for Ku Band reception, the LNB actually down converts 10 GHz to 12 Ghz. frequencies to the standard IF frequency band. All C Band LNBs incorporate a Local Oscillator (LO), operating at 5150 MHz inside the LNB. The final output frequency of the LNB is the LNB. The final output frequency of the LNB is the difference between the Local Oscillator and the received frequency. Let us assume that you plan to receive a satellite broadcast at 4050 MHz. The resulting IF frequency will be 5150 4050 = 1100 MHz, which is then tuned by the satellite receiver.
