Sea Tel DAC-2202, Installation And Operation Manual

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Installation DAC-2202 Antenna Control Unit
4-4
within 0.2 degrees of peak pointing to the satellite for a minimum of 5 seconds (FCC part
25.221 & 25.222 TX Mute requirement).
4.7.1.4. TS2 Synchro Gyro Compass Input.
Use the R1, R2, S1,S2 and S3 screw terminals to connect the Synchro Gyro Compass to the ACU.
4.7.1.5. 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.
4.7.1.6. 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.
4.7.1.7. 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 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.
4.8. AC Power To The ACU
Assure Power switch on the front panel of the ACU is turned OFF. Connect AC Power cord to the ACU and to the AC
Power outlet. It is recommended that a UPS be installed.
4.9. AGC Tracking Connection
Connect the IF Coax from one of the available outlets on the FSK Modem, splitter or matrix switch to “RF IN” jack on
the rear panel of the ACU.
For external AGC, connect a cable between the AGC or TM output of the master receiver or modem and the terminals
labeled “EXT AGC” and “ GND” TB2 of the Terminal Mounting Strip.