Chapter 4: Setting Up the GPS Plotter

4-13

To select the required Fix Mode:

1.Press the FIX MODE soft key repeatedly to cycle through the available modes.

i.Select GPS to calculate a fix using GPS data only.

ii.Select D to calculate a fix using Differential GPS data from an external RTCM beacon receiver.

iii.Select SD to calculate a fix using Satellite Differential data, if available.

2.Press CLEAR to exit.

D-GPS Set Up

The D-GPS SET UP function is only available when a Differential GPS receiver is connected and the unit is set as a GPS Source repeater (see GPS Source on page 4-8). It provides the ability to set up an external Differential GPS, either automatically (default) or by manually retuning it to a different differential beacon.

Note: If the display unit is receiving RTCM data via the NMEA input port, repeating a differential fix from another unit, the D-GPS SET UP soft key is grayed out. If receiving RTCM data, set up must be performed manually on the external DGPS receiver.

To set up a D-GPS:

Press the D-GPS SET UP soft key.

The D-GPS SET UP screen is displayed as shown in Figure 4-3.

DIFFERENTIAL GPS SET UP

MODE

AUTO

BEACON ID

1024

BEACON FREQUENCY

287.5kHz

BIT RATE

100 bps

SIGNAL STRENGTH

50dB

SIGNAL/NOISE RATIO (SNR)

30dB

DIFFERENTIAL AGE

2 s

 

 

 

 

SET BEACON FREQ.

 

 

 

MODE

287.5 kHz

 

BIT RATE

 

AUTO MAN

 

 

100 bps

D4966_1

Figure 4-3: D-GPS Set Up Screen

Page 91
Image 91
Raymarine 300 manual GPS Set Up, Differential GPS SET UP