Sea Tel ST88-21 C/Ku-Band TVRO, Инструкция по установке и эксплуатации

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ST88-21 C/Ku-Band TVRO Installation
3-29
Open provides continuity output (short to ground or open circuit) on the SW2 screw terminal to
satellite modem when the modem requires continuity control (short or open) to Mute transmission.
In dual antenna configurations this used for dual antenna arbitrators that require continuity control
(short or open) to switch. This hardware connection is also routed to the Console and OBM RJ45
ports.
JP3 SW3
(reserved) - Reserved for future use.
Default is OPEN
.
JP4 AGC (external AGC input) - Input from Satellite Modem which is used to provide a positive
satellite Network Lock (RX Sync) ID when the modem is on the correct network.
Default is
SHORTED
. The Locked/Unlocked logic state can be reversed by including SYSTEM TYPE 0128.
Shorted provides a pull-up DC Voltage input (determined by JP5 setting) into the ACU when the
modem supplies a continuity output. This hardware connection is also routed to the Console and
OBM RJ45 ports.
Open provides a DC Voltage directly from the modem into the ACU when the modem supplies a DC
Voltage output. This hardware connection is also routed to the Console and OBM RJ45 ports.
JP5
Voltage Output Select - Select 12VDC or 24VDC.
Default is 12VDC
.
JP6
GPS NMEA Output Select -
Default is SHORTED
.
Shorted provides GPS latitude & longitude, in alternating GGA & GLL formatted messages, to be
outputted on the Terminal Mounting Strip NMEA output terminals. This hardware connection is also
routed to the Console and OBM RJ45 ports.
Open disconnects the GPS output from the Terminal Mounting Strip NMEA output terminals.
3.12.5.2. SW1 - Band Selection control output.
This output is used to control below decks tone generator(s), or coax switch(s), for band selection
functions. The band selection control output is driven by the band selected in the MODE –
TRACKING display.
3.12.5.3. 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.
3.12.5.4. TS2 Synchro Gyro Compass Input.
Use the R1, R2, S1,S2 and S3 screw terminals to connect the Synchro Gyro Compass to the ACU.
3.12.5.5. 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.
3.12.5.6. TS4 Power
•
VREG
Screw terminal is used to provide a regulated DC operating voltage to ancillary
equipment. Voltage out is dependent 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.
3.12.5.7. 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