Справочник Пользователя для NorthStar Navigation 961XD
SECTION TWO - Installation
Page 14
961 INSTALLATION MANUAL Revision A
Connectors
•
Power connector (3-wire)
•
TNC connector (control head #1)
•
TNC connector (control head #2)
•
I/O #1 interface connector (18-wire)
•
I/O #2 interface connector (18-wire)
•
GPS antenna connector (BNC)
•
DGPS antenna connector (UHF)
•
PC connectors (variable)
•
VGA
Installing the antenna
Choosing an
antenna
Three antenna choices are available for the 961X or 961XD:
•
one for reception of GPS-only signals (the standard one-piece
“active” AN150 antenna)
“active” AN150 antenna)
•
one for reception of both GPS and DGPS signals (a two-piece
antenna system comprising the standard AN150 GPS antenna and
the 8410 DGPS coupler)
antenna system comprising the standard AN150 GPS antenna and
the 8410 DGPS coupler)
•
one for reception of both GPS and DGPS signals (optional one-piece
AN205-P “combination” antenna)
AN205-P “combination” antenna)
Choosing an
antenna location
Choosing the AN150 antenna location
The GPS receiving antenna is a vital link between the unit’s receiver and
the outside world. Aesthetics and easy access should be secondary to pro-
viding strong and reliable GPS signals to the unit’s receiver. You should
select a location for the antenna that meets the following requirements:
the outside world. Aesthetics and easy access should be secondary to pro-
viding strong and reliable GPS signals to the unit’s receiver. You should
select a location for the antenna that meets the following requirements:
•
The antenna should have a reasonably clear view of the horizon,
but be no higher than necessary (side-to-side motion of the
antenna caused by rolling of the vessel may degrade the SOG and
COG readings); however, the antenna should be 12 to 18 inches
above the surrounding surfaces to avoid interference.
but be no higher than necessary (side-to-side motion of the
antenna caused by rolling of the vessel may degrade the SOG and
COG readings); however, the antenna should be 12 to 18 inches
above the surrounding surfaces to avoid interference.
•
The antenna must be out of the radiation path of any on-board
radar sets or strong magnetic fields.
radar sets or strong magnetic fields.
•
The antenna must be lower than any INMARSAT communications
antenna.
antenna.
•
The antenna should be as far as possible from other high-power
transmitting antennas.
transmitting antennas.
•
Watch out for electromagnetic “shading” of antennas from rigging,
other vessels, shoreline buildings, and so on. Secure the cable well.
other vessels, shoreline buildings, and so on. Secure the cable well.