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HDOP LEVEL (Setting the HDOP level)
• In this menu, you can set the upper limit of the HDOP level using
this item. The HDOP level indicates the geodetic precision
determined by the constellation of the GPS satellites. Precision is
increased as this level decreases and vice versa. The constellation of the
GPS satellites changes constantly and the HDOP level changes
accordingly. The GPS/DGPS sensor stops positioning when the
HDOP level exceeds the upper level specified in this item. Therefore,
if you set a smaller value as the upper limit, the precision is improved,
but the possibility of interrupting positioning becomes larger.
AVERAGE (Setting an interval to average the data)
• In this menu, you can set an interval to average the positioning data.
If you set a longer interval, the positioning data becomes more stable.
If you set a shorter interval, you can reflect your vessel's movement
changes more quickly, though the positioning data becomes less
stable.
EXCLUDE SAT (Setting the satellite number not
used)
• In this menu, you can set the satellite numbers so that excluded
satellites are not used for positioning. The GPS/DGPS sensor does
not use these excluded satellites for positioning.
The satellite number not used cannot be set by GPS112/DGPS212
themselves.
DGPS SETTING
• In this menu, you can perform the basic settings of the beacon
module of the DGPS sensor.
Note:
• Use TX COMMAND to send the values set in the following settings.
MODE (Setting the reception mode of the beacon)
• In this menu, you can set the reception mode of the beacon.
FREQUENCY (Setting the beacon frequency)
• In this menu, you can set the beacon frequency. The frequencies range
from 283.5 kHz to 325.5 kHz and you can set it in increments of 0.5
kHz.
BAUDRATE (Setting the beacon baud rate)
• In this menu, you can set the baud rate used by the beacon.
DGPS SETTING
MODE
AUTO
FREQUENCY
283.5KHZ
BAUDRATE
100BPS
TX COMMAND
95
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