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102 Firmware Version 5.4
• GPS Speed
• Position Rate
The frequency that the receiver is sending the display your position in longitude and latitude (GGA). For
example, at 5 Hz the display would be receiving a position message 5 times every second.
• Speed/Heading Rate:
The frequency that the receiver is sending the display your ground speed and heading (VTG)
Note: Position Rate and Speed/Heading Rate should both be set at a minimum of 5 Hz for guidance or
steering.
• Change Longitude/Latitude Format
Pressing this button changes the Longitude/Latitude format. These can either be shown in
Degrees, Minutes and Seconds; or Decimal Degrees.
• View Messages
To view the NMEA or TSIP messages coming from the receiver, press the View Messages button.
• UTC Time
UTC is an acronym for Coordinated Universal Time, a high-precision atomic time standard that defines local
time throughout the world. Different versions of universal time use atomic clocks to correct for irregularities
in the Earth's rotation and orbit. UTC is used in navigation, astronomy, aviation, Internet broadcasts, and
amateur radio. If you are receiving information from the satellite, then the UTC Time should automatically
update.
• UTC Date
If you are receiving information from the satellite, then the UTC date should automatically update.
• HDOP
Horizontal Dilution of Precision (HDOP) indicates the quality of the horizontal GPS position. Lower HDOP
numbers are optimal, higher numbers are undesirable.
• PDOP
Position Dilution of Precision (PDOP) is a unitless measure indicating when the satellite geometry can
provide the most accurate results. When satellites are spread around the sky, the PDOP value is low and
the computed position is more accurate. When satellites are grouped close together, the PDOP is high and
the positions are less accurate. Lower PDOP numbers are optimal, higher numbers are undesirable.
• Port
The connection between the display and the GPS as established at a message format and baud rate.
• Frequency
The Correction Frequency indicates the GPS satellite frequency used by the receiver.
Note: The Correction Frequency diagnostic does not show for WAAS connections.
• SNR
If your receiver is using Beacon differential corrections, the frequency and signal to noise ratio (SNR) will
be displayed. Signal-to- Noise Ratio (SNR) indicates the strength of the differential correction signal in
relation to the amount of background noise that can interfere with signal reception.