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Garmin 18X - page 1
GPS 18x TECH NICAL SPECI FICA TIONS Gar min Int erna tio nal, Inc. 1200 E. 151 st Olath e, KS 66062 USA Street 190 - 00879 - 08 Revisio n D October 2011 ...
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Garmin 18X - page 2
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page ii © 2008 – 20 11 Garmin Ltd. or its subsid iaries Gar min Int erna tio nal, Inc 1200 Eas t 151st S treet , Olathe , Ka nsa s 66062, US A Tel. 913/397. 8200 or 800/ 800.1020 Fax 913/ 397.8282 Garmin (Eu rope) Ltd. Liber ty Ho use, Hou nsdo wn B usi ness P ar k South ampton , Hampsh i ...
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Garmin 18X - page 3
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page iii TABLE OF CONTENTS 1 Intro duction ..............................................................................................................................1 1.1 Cauti ons ........................................................................................................... ...
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Garmin 18X - page 4
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page iv 4.2.8 Track Ma de Good and G round Sp eed (VTG ) ................................................................................................ . 18 4.2.9 Geographi c Positi on (GLL ) .................................................................................................. ...
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Garmin 18X - page 5
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 1 1 1.1 CA UTIONS INTRODUCTION CAUTION The GP S system is operated by the government of t he United States, which is so lely respo nsible for its ac curacy and maint ena nce. Alt houg h the G P S 18 x is a precision el ectronic NAVigation AID (NAVAID), any NAVAID can be misu s ed or mis ...
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Garmin 18X - page 6
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 2 1.2 LIMITED W ARRANTY This Garmin product is w ar ranted to be free from defects in materi als or workmanship for one year from the date of purchase. With in this per iod, Gar min will, at its sole op tion, repair or replace a ny components that fail i n normal use. Such repairs or re ...
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Garmin 18X - page 7
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 3 1.3 OVERVIE W The GPS 18 x series products include an embedded receiver and an an tenna. Based on the proven technology found in othe r Garmin GPS receivers, the GPS 18 x tracks multiple satellites at a ti me while pro viding fast time - to - first - fix, precise navigation updates (f ...
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Garmin 18X - page 8
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 4 1.5 GPS 18 x SER IES There are several differen t versions of GPS 18 x available. Refer below for a list of t he three major divisions of the GPS 18 x Series. 1.5.1 GPS 18 x USB The GPS 18 x USB interfaces to a computer with an avail able USB port. Drivers are available for us e on Wi ...
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Garmin 18X - page 9
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 5 1.6 TECH NICAL SPECIFICA TIONS Specifications are subject to ch ange without notice. 1.6.1 Physical Characteristics 1.6.1.1 Siz e 61 mm (2. 4 inc hes) i n diam eter and 19.5 m m (0.77 inch es) in hei ght 1.6.1.2 Weight • GPS 18 x USB: 3. 7 oz (10 5 g) • GPS 18 x PC: 6. 3 oz (1 80 ...
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Garmin 18X - page 10
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 6 1.6.2.5 Environmental Characte ristics • Operating Temperature: - 30°C to +80°C (- 22°F t o +176°F) • Storage Temperature: - 40°C to +90°C (- 40°F to + 194°F) 1.6.3 GPS Performance 1.6.3.1 Receiv er WA AS -e nabled GPS receiver continuously tracks and uses multiple satell ...
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Garmin 18X - page 11
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 7 1.6.4.3 G PS 18 x PC, G PS 18 x LV C, & GPS 1 8 x- 5Hz Protocols • NMEA 0183 Version 2.0 or N MEA 0183 Vers ion 2.30 (V ers ion 2.0 i s fa ctory de fault , programmabl e by data field 7 of the PGRMC 1 sentence described in section 4.1.4 Addi tion al Sens or Configurati on Inf or ...
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Garmin 18X - page 12
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 8 2 The GPS 18 x LV C/1 8 x- 5Hz interfaces to a serial port. The unit accepts TIA - 232 - F (RS - 232) level inputs and transmits vo lta ge leve ls fro m gro und to the i npu t volt age , T IA - 232 - F (RS - 232) polar ity. GPS X 18 x LVC & GPS 18 x - 5H z WIRING A ND PINOUTS The ...
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Garmin 18X - page 13
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 9 Figure 2. PDA Serial Port Interconnection Figure 3. Basic NMEA Device Interconnection ...
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Garmin 18X - page 14
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 10 3 The central threaded recess accepts a m etric M3 threaded b olt. The recess is approximately 4 mm deep (4.32 +/ - 0.0 8 mm). T he fo llo wing d rawi ngs s ho w exa mple geo metri es fo r mounti ng har d ware i n ca s e you wish to des ign your o wn c usto m mo unt. Figu re 5 sho ws ...
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190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 11 UN ITS : M IL LIM E TER S Figure 5. GPS 18 x Suction C up M ount Cent er Hole Dim ensions UN ITS : M IL LIM E TER S Figure 6. GPS 18 x Flush M ount Dimensio ns Figure 7. GPS 18 x Flush M ount Center H ole Di mensions ...
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190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 12 4 The interface protocol design of th e GP S 18 x PC, LVC, and GP S 18 x- 5Hz products is based on t he National Marine Electronics Association ’s NMEA 01 83 ASCII interface specificatio n. T his standard is full y defined in NMEA 0183, Vers ion 2.30 . Copi es m ay be obtaine d fro ...
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Garmin 18X - page 17
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 13 4.1.2 Sensor Initialization Information (PGRMI) The $PGRMI sentence provides i nformation used to initialize the GP S sensor’s set po sition and time used for satellite acquisit ion. Receipt of this sentence by the GPS sensor caus es t he software to restart th e satellite acquisit ...
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Garmin 18X - page 18
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 14 4.1.4 Additional Sensor Configuration Information (PGRMC1) The $PGRMC1 sentence pro vides addition al inform ation used t o conf igure t he GPS sens or operation. Conf iguration parameters are stored in non - volatile m e mory and retained between power cycles. The GPS sensor wi ll e ...
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Garmin 18X - page 19
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 15 4.2 TRANSMITTED NME A 018 3 SENTENCES The subsequent paragraphs define th e sentences that can be transmitted by the GPS 18 x PC and LV C. 4.2.1 Sentence Transmission Rate Sentences are transmitted with respect to the u ser selected ba ud rate. The GPS sensor will transm it each sent ...
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Garmin 18X - page 20
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 16 4.2.2 Transmitted Time The GPS senso r outp uts Coordinated Universal Time (UTC) date and time of day in the transmitted sentences. Before the initia l position fix, the on - board clock provides the date a n d time of da y. After the initial p osition fi x, the date and time of day ...
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Garmin 18X - page 21
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 17 4.2.4 Global Positioning System Fix Data ( GG A ) $GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,<12>*hh<CR><LF> <1> UTC tim e of pos ition fix, hhmm ss format f or GPS 18 x PC or LVC; ...
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190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 18 4.2.7 Recommended Minimum Specific GPS/TRANSIT Data (RMC) $GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*hh<CR><LF> <1> UT C t i me of posi tion fix, hhmm s s form at for G P S 18 x P ...
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Garmin 18X - page 23
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 19 4.2.11 GPS Fix Data Sentence (PGRMF) $PGRMF,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>,<14>,<15>*hh<CR >< LF> <1> GPS we ek num ber (0 to 102 3) <2> GPS seco ...
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Garmin 18X - page 24
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 20 4.2.15 3D Velocity Information (PGRMV) $PGRMV,<1>,<2>,<3>*hh<CR><LF> <1> True east velocity, - 514. 4 to 514.4 m eters/ second f or GPS 18 x P C/LVC; - 514.44 to 514.4 4 for GPS 18 x- 5Hz <2> Tr ue no rth vel ocit y, - 514.4 to 514.4 m eters/ ...
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Garmin 18X - page 25
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 21 The accuracy of th e five - pul se - per - sec ond outp ut i s ma intained only whil e the GPS 18 x- 5Hz can comput e a valid position fix. T o obtain the most ac curate results, t he five - pulse - per - second output should be calibrated agains t a local time reference to compen sa ...
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Garmin 18X - page 26
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 22 The follo wing is a list of the Gar min GPS 18 x Earth datum indices an d the corresponding earth datum name (including the area of application): A PPENDIX A: EARTH DA T UM LIST 0 ADINDAN – Ethiopia, Mali, Senegal, Sudan 9 AUSTRALIAN GEODET IC 1984 – Au s tralia, T asmania Isla n ...
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190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 23 44 KER T AU 1948– West Malay s ia, Singapore 45 L.C. 5 AST RO – Ca yman B ra c Isla nd 46 L IBERIA 1964 – L iberia 47 LUZON – Mind anao Isl and 48 LUZO N– P hil lip pines (e xclud ing Mi nda nao I sla nd) 49 MA HE 1971– Mahe Island 50 MARCO AST RO – Salvage Islands 51 M ...
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190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 24 83 PROVISIONAL SOUTH AMERICAN 1956 – Bolivia, Chil e, Colombia, Ecuador, Guyana, Peru, Venezuela 84 SOUTH AMERICAN 1969 – Argentina, B olivia, Br azil, Ch ile, Colombia, Ecuador, Guyana, Paraguay , Peru, Venezuela, Trinidad and Tobago 85 SOUTH ASIA –Sing apore 86 PROVISIONAL SO ...
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Garmin 18X - page 29
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 25 In B inar y Outp ut mode, GPS 18 x series pro ducts will trans mit packets once per second. The record contains prim arily post - proces s informati on such as position and velocity informa tion. For the GPS 18 x PC , GPS 18 x LVC , and GPS 18x - 5Hz the record is sent at a default b ...
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190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 26 The sat ellit e data has a record ID of 0x72 with 84 (0x54) data by tes. The data bytes contain data for 12 satellites as descri bed below . Satellite Data Record typedef struct { uint8 svid; //space vehicle identification (1 – 32 and 33 – 64 for WAAS) uint16 snr; //signal - to - ...
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Garmin 18X - page 31
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 27 Position Record The Position Record has a record identif ier of typedef struct { float alt; float epe ; float eph; float epv; int fix; double gps_tow; double lat; double lon; float lon_vel; float lat_vel; float alt_vel; float msl_hght; int leap_sec; long grmn_days; } cpo_pvt_data; al ...
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Garmin 18X - page 32
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 28 DLE and ETX bytes: Sample C code to receive th e two records should filter DLE and ETX bytes as descri bed belo w : typedef enum { DAT, DLE, ETX } rx_state_type; /* Declare and initialize static variables */ static char in_que[ 256 ]; static int in_que_ptr = 0; static rx_state_type r ...
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Garmin 18X - page 33
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 29 In certain cases, you may need to change the default baud rate of your Garmin GPS receiver while in Garmin mode. Follow these steps to tem porarily change the baud rate. APPENDIX C: CH ANGING THE BAUD RATE IN G AR MIN M ODE R efer to the Garmin Device Interface Specification found in ...
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Garmin 18X - page 34
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 30 P r o b l e m: It is possi ble for Windows to incorrectly interpret t he NM EA 0183 outpu t of the GPS 18x PC as the output of a Microso ft Serial B allPoint Mouse. W hen that ha ppens, Wind ows loads d rivers for the Ser ial BallPo int Mouse. This causes the cu rsor to move erratica ...
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Garmin 18X - page 35
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 31 4. Select the s erial p ort to whic h the GP S 18 x is connected. Select Auto to have the program auto matically dete rmine the b a ud r ate, or select Manual to manually select the b aud r ate of the GPS 18x. Cl ick OK when don e. 5. Click the Connec t icon , or select Comm > Co ...
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Garmin 18X - page 36
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 32 The Garm in Sensor C onfiguration Softwa re ( SNSRCFG . exe ) co nfigur es t he GP S se nsor s ba sed on user - selected parameters. Some application features include the ability to download GPS sensor conf iguration, maintain different confi gur atio ns in files, a nd pe rfor m GP S ...
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Garmin 18X - page 37
190 - 00879 - 08 GPS 18x Techni cal Specifications Rev. D Page 33 Menus File M enu The File M enu all ows yo u to o pen, save, and p rint senso r c onfi gur atio ns. T he it ems i n the File Men u wor k like mos t W in d o ws - based prog rams. Comm Menu The Comm ( Co mmu nicat io n) Menu allows you to set th e port number and baud rate, as well as ...
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Garmin 18X - page 38
Get Configu ration From GPS (F8): Retr ieves the c urre nt p ro gra mming fro m the se nsor . T he p rogra mmin g is the n displayed in the Main Interface window. Send Config uratio n To GPS (F 9): Sends yo ur up dat ed c onfi gurat ion p ro gra mming to the sen sor . Switch to NMEA M ode (F10): Sw itc hes the unit to NMEA Mode. The sens or must be ...
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