User's Manual

Chapter 2 System Description
2.3.7 High Band Dual Band Pass Filter (DBPF)
The DBPF receives s
ignals from the S-Band antenna and provides filtering before the signals
reach the LNA and finally the HBE.
The DBPF allows the HB SAT1 A and SAT1 B ensembles to pass, while providing rejection in
the 2305-2320 MHz and 2345-2360MHz WCS frequency bands as well as the Low and High
SiriusXM terrestrial bands. The attenuation is to comply with TRS-DRU System-SPEC-01-
00-000, Rev 1.3, DRU System Level Specification.
Figure 2-18 DBPF
2.3.8 High Band Low Noise Amplifier (LNA)
The LNA is a wide-band device which amplif
ies the HB
SAT 1 A and SAT 1 B ensembles it
receives from the S-Band antenna (via the DBPF). It is a high dynamic range device, which
allows it to amplify input signals with relatively high power levels without producing
excessive levels of distortions on the output.
To ensure stable and reliable operation under the most extreme source VSWR conditions, an
isolator is incorporated into the LNA (front end). The isolator also suppresses spurious
signals and LO leakage to the receive antenna.
The LNA design is based on low noise, high dynamic range transistor. The combination of a
low noise figure and high output IP3 provides the best compromise between linearity and
sensitivity of the LNA.
Figure 2-19 LNA
SX03-30000-01-M01
2-20