Furuno GP-1650DF, GP-1650F manual 11-6, Dgps Setup Options menu

SPD/CSE SMOOTHING

During position fixing, ship’s velocity (speed and course) is directly measured by receiv- ing GPS satellite signals. The raw velocity data may change randomly depending on re- ceiving conditions and other factors. You can reduce this random variation by increasing the smoothing. Like with latitude and longi- tude smoothing, the higher the speed and course smoothing the more smoothed the raw data. If the setting is too high, however, the response to speed and course change slows. For no smoothing, enter all zeroes. The default setting is 005 (sec).

GPS SPEED AVE

Calculation of ETA is based on average ship’s speed over a given period. If the period is too long or too short calculation error will re- sult. Change this setting if calculation error occurs. The default setting is 60 seconds, which is suitable for most conditions.

LAT OFFSET, LON OFFSET

GPS generated position may be off by some seconds due to GPS signal variation. You may apply an offset to GPS position to refine position accuracy.

DISABLE SATELLITE

Every GPS satellite is broadcasting abnor- mal satellite number(s) in it’s Almanac, which contains general orbital data about all GPS satellites, including those which are malfunc- tioning. Using this information, the GPS re- ceiver automatically eliminates any malfunctioning satellite from the GPS satel- lite schedule. However, the Almanac some- times may not contain this information. If you hear about a malfunctioning satellite from another source, you can disable it manually. Enter satellite number (max. 3 satellites) in two digits and press the soft key ENTER or the [ENTER] key.

LATITUDE, LONGITUDE

The default latitude and longitude position is San Francisco, USA (38.00.000’N, 123.00.000’W). When the unit is turned on first the first time it begins searching for its actual position. To lessen the time required to find position, you may enter your position manually. To switch from North to South and vice versa, use the soft key N<-->S, and to switch from West to East and vice versa, use the soft key W<-->E. Finally, press the soft key ENTER or the [ENTER] key.

ANT. HEIGHT

Enter the height of the antenna unit above sea surface. For further details refer to the Installation Manual. The default setting is 5 m.

FIX MODE

You can choose the position-fixing mode from 2D or 2D/3D. 2D requires three satellites to fix position; 2D/3D requires three or four sat- ellites, whichever is available. The default set- ting is 2D/3D.

DGPS SETUP OPTIONS menu

This menu sets parameters for the DGPS beacon receiver. (GP1650DF, or GP1650F equipped with DGPS beacon receiver.) To display it, press the [MENU] key followed by the soft keys GPS/DPGS/TD OPTIONS and

DGPS SETUP OPTIONS.

		DGPS
sDGPS MODE	ON	OPTION
BEACON FREQUENCY	AUTO
		EDIT
BEACON BAUD RATE	AUTO
DGPS ALARM	OFF

DGPS 3D
	RETURN

Figure 11-10 DGPS setup options menu

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