Norsat International Inc. NSLK3200 ユーザーズマニュアル
Norsat NewsLink
099-20003-01OM
Norsat
Page 15
Receive IF (
R
X
)
The Receive IF (
R
X
) connector is a 50 ohm N-type female connector, which is
colour coded green. The signals supplied on this interface are:
•
Receive IF: the received signal amplified and downconverted by the LNB.
•
24 V DC: supplied by the Baseband/IF unit to power the LNB.
N
OTE
This cable is a 50 ohm cable rather than the usual 75 ohm cable for receive
systems. The LNB has a 75 ohm connection, however, the impedance is
changed in the Interface/Indicator unit.
systems. The LNB has a 75 ohm connection, however, the impedance is
changed in the Interface/Indicator unit.
Transmit Monitor In (
T
X
M
ONITOR
)
The Transmit Monitor In (
T
X
M
ONITOR
) connector is a 50 ohm N-type female
connector, which is colour coded blue. The signals supplied on this interface
are:
are:
•
Transmit Monitor IF: a downconverted sample of the transmitted signal;
the transmitted signal is coupled and downconverted to L-band (950-1450
MHz).
the transmitted signal is coupled and downconverted to L-band (950-1450
MHz).
•
24 V DC: supplied by the Baseband/IF unit to power the Downconverter
Module.
Module.
•
10 MHz reference: supplied by the Baseband/IF unit to the Downcon-
verter Module to lock the local oscillators used in the downconversion.
verter Module to lock the local oscillators used in the downconversion.
SSPA Control and DC (
DC/C
ONTROL
)
The SSPA Control and DC (
DC/C
ONTROL
) connector is a multi-pin amphenol
female connector. The signals supplied on this interface are:
•
SSPA Mute Control: allows the SSPA to be turned off by the Baseband/IF
unit.
unit.
•
SSPA Temperature Sensor Reading: provides an indication of the SSPA
temperature; this measurement is used in the temperature compensation
algorithms found in the Baseband/IF unit.
temperature; this measurement is used in the temperature compensation
algorithms found in the Baseband/IF unit.
•
SSPA Power Detector Reading: provides an indication of the SSPA trans-
mitted power; this measurement is displayed on the user interface and is
used in the power control algorithms.
mitted power; this measurement is displayed on the user interface and is
used in the power control algorithms.
•
Received Signal Strength Indication: provides an indication of the
received signal strength in a specified 10 MHz window. The 10 MHz win-
dow is specified on the NewsLink GUI, with the bandwidth of the window
being fixed. The receive signal strength is measured in the Baseband/IF
unit and is displayed on the NewsLink GUI. This Received Signal
Strength is provided to the Antenna/RF unit for display via the Receive
Signal Strength Indication signal.
received signal strength in a specified 10 MHz window. The 10 MHz win-
dow is specified on the NewsLink GUI, with the bandwidth of the window
being fixed. The receive signal strength is measured in the Baseband/IF
unit and is displayed on the NewsLink GUI. This Received Signal
Strength is provided to the Antenna/RF unit for display via the Receive
Signal Strength Indication signal.
•
Ground: ties the chassis of the Baseband/IF and Antenna/RF units
together.
together.
Test Interface Panel
Receive Out (
R
X
O
UT
)
The Receive Out connector is a 50
Ω
N female connector. The L-band receive
signal is split prior to the downconverter; one portion is provided to an external