ST94-21 C/Ku-Band TVRO
Installation
3-27
3.11.5.2.
SW2 - The Blockage/TX Mute
Control output is driven by Blockage and RF Radiation Hazard functions. This output will short to
ground whenever the antenna is within the programmed AZ LIMIT zone(s) or is Searching, Targeting
or is mispointed 0.5 degrees from satellite peak. This output is commonly used to drive Dual or
Quad Antenna Arbitrator coax switches in dual antenna configurations. The coax switches select
which antenna is feeding signal to the below decks equipment.
3.11.5.3.
TS2 Synchro Gyro Compass Input.
Use the R1, R2, S1,S2 and S3 screw terminals to connect the Synchro Gyro Compass to the ACU.
3.11.5.4.
TS3 Step-By-Step (SBS) Gyrocompass Input.
Use the COM, A, B and C screw terminals to connect the SBS Gyrocompass to the ACU. Some SBS
Gyro distribution boxes have terminals which are labeled S1, S2 & S3 instead of A, B and C.
3.11.5.5.
TS4 Power
•
VREG
Screw terminal is used to provide a regulated DC operating voltage to ancillary
equipment. Voltage out is dependant upon which terminal mounting strip assembly is
provided. 126865-1 supplies 8Vdc @ 1Amp, while the 126865-2 assembly supplies 5Vdc
@ 2Amps.
•
GND
Screw terminal is the ground reference for the regulated and unregulated power
terminals.
•
12/24
Screw terminal is commonly used to provide operating voltage to a external GPS,
Dual Antenna Arbitrator or other below decks tone generators or switches. Voltage output
is based on the T.M.S assemblies JP5 jumper settings.
3.11.5.6.
TS5 NMEA A/B, GPS output.
•
RxA- and RxA+- screw terminals, which are defined as the NMEA A connection is used to
connect to the ships Gyro Compass (Heading). The NMEA0183 compliant inputs are then
connected via a 9 pin ribbon cable to the ACU’s J2 NMEA communications port. A GPS
(Latitude and Longitude) input may also be connected, but is not required because there is
a GPS device already installed in your antenna..
NOTE:
If you connect a ships GPS to the
terminal mounting strip, you
MUST
disconnect the GPS antenna on the antenna
pedestal.
•
RxB- and RxB+ screw terminals, which are defined as the NMEA B connection is used to
connect to the ships Gyro Compass (Heading). The NMEA0183 compliant inputs are then
connected via a 9 pin ribbon cable to the ACU’s J2 NMEA communications port. A GPS
(Latitude and Longitude) input may also be connected, but is not required because there is
a GPS device already installed in your antenna.
•
TxA- screw terminal is used to provide a Pseudo GPS (GGA and GLL formats) output to
other system components such as a Satellite Modem.
3.11.6.
Other BDE connections
Connect your other Below Decks Equipment (ie, telephone, fax machine and computer equipment) to
complete your configuration.
3.12.
Final Checks
3.12.1.
Visual/Electrical inspection
Do a visual inspection of your work to assure that everything is connected properly and all cables/wires are
secured.
3.12.2.
Electrical - Double check wiring connections
Double check all your connections to assure that it is safe to energize the equipment.
EAR Controlled - ECCN EAR99
Summary of Contents for ST94-21
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