ADInstruments S7200 Operation Manual page 115

AD INSTRUMENTS
SaTCR principle introduction
BPF
BPF
Probe
LO
BPF
BPF
Unicable LNB receive Ku band satellite signal similar with traditional LNB, the
difference is add SCR and MCU chip. These chips are ST provided SaTCR-1 and
ST7LLNB1 chip. Unicable LNB principle as the Figure 5-73 show.
Vertical polarization / Low LO (V/L), Vertical polarization / High LO (V/H),
Horizontal / Low LO, Horizontal / High LO (H/H), four different frequency bands
satellite signal enter low noise amplifier, ensure received signals have high
sensitivity. These signals pass the band pass filter to filter the useless signals.
Mixing these signals with low LO and high LO, after mixing all the signal is convert
to L band. These L band signals input in a circuit matrix switch
ST Microelectronics has introduced a new device that targets the LNB, multi-
switch and SMATV market. This device, called SaTCR-1 (Satellite Channel Router),
is able to translate a transponder to any location in the satellite bandwidth
(950~2150MHz). Mltiple SaTCR devices coupled with band-pass filters and RF
matrix allow to combine transponders from different polarizations and bands on
a single coaxial cable.
To be able to receive all the available channels in the Ku-band using a conventional
LNB, a set top box has to select the polarization and the local oscillator
S7200 TV Signal Analyzer Operation Manual
SCR
SaTCR-1
4×2
or
LO
4×3
Matrix
SCR
SaTCR-1
Figure 5-73 Unicable LNB Block Diagram
BPF
∑
Unicable
Choke
BPF
PC
MCU
PC
ST7LNB1
Legacy
output
(Option)
950MHz
2150MHz
1210MHz 1420MHz
Output
Unicable
IRD
One Cable
103