Filtering: . Waveguide cutoff (1125) will remove cellular band ( see lbw dewar ). Bandpass filter 1225 to 1525. filter out satellite band 1550 and above. Headroom in the system: . ... headRoom . ... Downstairs Amps . ... The san juan radar has a good chance of saturating the downstairs amps and probably the digitizer ( but... estimating pulsed power levels with a spectrum analyzer is probably not the smartest way of doing it) . Harmonics created in the IF (downstairs amps): . ...