Figure 3-20. LNA Gain/Slope Level.
Overall Receiver Gain
The overall receiver gain is calibrated
using signal sources within the
terminal in conjunction with precision
attenuators and a low level SHF hard
is obtained from the SHF local
synthesizer in the upconverter
The output level of this
signal is between the limits of + 6 and
+ 12 dBm and is passed through the
SHF hard limiter and attenuator to
provide a -52 dBm signal at the 20 dB
coupler on the AME subassembly,
which gives a nominal -72 dBm signal
at the LNA input.