4 - System setup
4.79
• GPS Pos. Rate (Hz)
Represents the cycles per second (shown in Hz) that the display receives position information from viewable satellites.
(This is the same number as shown on GPS Rate (Hz) drop-down list menu located on the General Tab).
• Output Rate (Hz)
Represents the cyclical rate (in Hz) at which the receiver sends information to the display. This field shows a value of
either 1 or ASAP.
• The default rate is 1 Hz.
• ASAP represents a Hz value of more than 1.
• NMEA Messages
These check boxes represent various communication protocols or formats that have been set by the National Marine
Electronics Association (NMEA), and used in information “strings” or sentences output by the GPS Receiver. At present,
the display only requires two NMEA Message formats: GGA and VTG.
• GGA: position in longitude and latitude.
• VTG: ground speed
• GSV, GSA: required to view the Satellite Plot, but are not required for GPS information.
• GLL, ZDA, RMC, MSS: Leave these other NMEA message formats unchecked, unless you are connected to a third-
party monitor and have been directed to do so.