Garmin GPS 10 Deluxe Technical Specifications

Also see for GPS 10: Declaration of conformity Features Quick start guide Specification

Garmin GPS 10 Deluxe Technical Specifications Manual pdf 12 page image

190-00516-00 GPS 10 Technical Specifications Rev. BPage 83 GPS 10 SOFTWARE INTERFACEThe interface protocol design of the GPS 10 product is based on the National Marine ElectronicsAssociationís NMEA 0183 ASCII interface specification. This standard is fully defined in NMEA 0183,Version 2.30. Copies may be obtained from NMEA, http://www.nmea.org/.In addition to the standard NMEA 0183 sentences, the GPS 10 may also be configured to transmitinformation over their serial interface using NMEA 0183 compliant Garmin proprietary sentences. Theseproprietary sentences begin with the characters, ì$PGRMî, instead of the characters ì$Gî that are typicalof the standard NMEA 0183 sentences. The characters ì$Pî indicate that the sentence is a proprietaryimplementation and the characters and ìGRMî indicate that it is Garminís proprietary sentence. The letter(or letters) that follow the characters ì$PGRMî uniquely identifies that particular Garmin proprietarysentence.It is also possible to configure the GPS 10 to transmit binary phase data information over their serialinterface. See Appendix B: Binary Phase Output Format for details.The following sections describe the NMEA 0183 data format of each sentence transmitted and received bythe GPS 10 product.3.1 RECEIVED NMEA 0183 SENTENCESThe following paragraphs define the sentences that can be received on the GPS sensorís port. Null fields inthe configuration sentence indicate no change in the particular configuration parameter. All sentencesreceived by the GPS sensor must be terminated with , the ASCII characters for carriage return(0D hexadecimal) and line feed (0A hexadecimal). The checksum *hh is used for parity checking data andis not required, but is recommended for use in environments containing high electromagnetic noise. It isgenerally not required in normal PC environments. When used, the parity bytes (hh) are the ASCIIrepresentation of the exclusive-or (XOR) sum of all the characters between the ì$î and ì*î characters, non-inclusive. The hex representation must be a capital letter, such as 3D instead of 3d. Sentences may betruncated by after any data field and valid fields up to that point will be acted on by the sensor.3.1.1 Almanac Information (ALM)The $GPALM sentence can be used to initialize the GPS sensorís stored almanac information in theunlikely event of non-volatile memory loss or after storing longer than six months without tracking GPSsatellites.$GPALM,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>,<14>,<15>*hh<1> Total number of ALM sentences to be transmitted by the GPS sensor during almanac download.This field can be null or any number when sending almanac to the GPS sensor.<2> Number of current ALM sentence. This field can be null or any number when sending almanacto the GPS sensor.<3> Satellite PRN number, 01 to 32<4> GPS week number<5> SV health, bits 17-24 of each almanac page<6> Eccentricity<7> Almanac reference time<8> Inclination angle<9> Rate of right ascension<10> Root of semi major axis<11> Omega, argument of perigee<12> Longitude of ascension node<13> Mean anomaly<14> af0 clock parameter<15> af1 clock parameter