C-Nav 1000, Hardware Reference Manual

Page 1: ...DGNSS Systems Hardware Guide www cnavgnss com ...

Page 2: ...8 381 8973 South America Rio de Janeiro Sales 55 21 8082 3736 Rio de Janeiro Support 55 21 7629 9606 Peru 51 1 365 7964 Africa South Africa 27 21 705 2741 Angola 244 222 330202 Asia Singapore 65 629 59 738 China 86 1391 178 0036 India 91 22 762 9126 Indonesia 62 21 521 3835 Japan 81 35 312 4600 U A E 971 50 642 4419 Vietnam 844 754 3216 Europe UK Bury St Edmunds 44 1284 703 800 Norway 47 5779 6070...

Page 3: ...pport normal operational hours are 7am to 5pm Monday through Friday U S Central Standard Time In addition our regional offices can provide first line support for the C Nav DGNSS System Please reference your unit serial number located on sticker on the front or side of the DGNSS DGPS receiver when making any service calls Notices C Nav Hardware Reference Guide Revision C August 2011 C C Technologie...

Page 4: ...ption Service 14 L band Correction Signal 15 Chapter 2 Installation Guide 17 C Nav Antenna Installation Notice 17 Standard Antenna Installation 17 Antenna Location 17 Antenna Installation 19 Coaxial Cable 21 Cable Route 21 Coaxial Cable Installation 21 Lightning Protection 23 GNSS Receiver 23 Chapter 3 C Nav DGNSS Hardware Specifications 24 C Nav3050 24 C Nav3050 Receiver 24 C Nav3050 Antennas 26 ...

Page 5: ...Coaxial Cable 75 Terminating Coaxial Cable Times Microwave Systems 75 Coax Seal Weather Sealant Installation 79 Chapter 6 Glossary 83 Troubleshooting 83 Abbreviations 86 Definitions 89 List of Tables Table 1 1 Common Accuracy Measures Used with GPS 11 Table 1 2 L band Correction Identifiers and Modes 16 Table 1 3 C Nav3050 Satellites Firmware Version 1 0 1 5 and Earlier 16 Table 1 4 C Nav3050 Sate...

Page 6: ...C Nav1010 NAV82 001018 0001LF Radiation Pattern 45 25 35 Figure 3 17 C Nav1010 NAV82 001003 0001LF Antenna and Mounts 25 36 Figure 3 18 C Nav1010 NAV82 001003 0001LF Radiation Pattern 25 36 Figure 3 19 C Nav2050 Front View 37 Figure 3 20 C Nav2050 Top View 37 Figure 3 21 C Nav2050 Power Supply 39 Figure 3 22 C Nav2050 RS 232 to DP RS 422 MOXA Converter MOXTCC 801 39 Figure 3 23 C Nav2050 Isolation...

Page 7: ... NaviGator II rev A front USB port model Outline Diagram mm 61 Figure 4 1 Huber Suhner Model No 3403 17 0045 64 Figure 4 2 Huber Suhner Model No 3402 17 0070 66 Figure 4 3 Moxa TCC 80I Converter Dimensions 70 Figure 4 4 TCC 82 Converter Dimensions 71 Figure 4 5 LMR400 Attenuation vs Frequency Graph 73 Figure 4 6 LMR400 Connectors 73 Figure 5 1 Components for Termination of Coaxial Cable 75 Figure ...

Page 8: ...g factor with traditional DGNSS Another is that the accuracy of the mobile user s position will be degraded as the baseline distance separation between the reference station and the mobile user increases This is due to geographic spatial de correlation errors introduced by the different ionospheric delays and GNSS satellite orbit biases between the DGNSS reference site and each individual mobile D...

Page 9: ...ivers will correct the raw pseudorange for the ionospheric delay The simplest correction employs an internal diurnal model of these delays For Single Frequency L1 only GNSS users the parameters can be updated using information in the GNSS correction communications message The effective accuracy of this modeling is about 2 5 meters in ranging for users in the temperate zones A second technique for ...

Page 10: ...ons within the Earth Centered Earth Fixed World Geodetic System 1984 WGS84 ellipsoid and Cartesian coordinate system GNSS receivers internally transform the Cartesian data into degrees Latitude and Longitude with the vertical height expressed in meters above the reference ellipsoid Therefore when comparing coordinate values for any location in the world such as a map position or feature a physical...

Page 11: ...λ L2 0 244210213425 meters Measurement Dimension Statistical Measure Abbreviation Probability Approximation Related Expressions 1D Root Mean Square rms 68 3 σ MSE mean square error the square of the rms 1D Probable Error PE 50 0 674 σ N A 2D Error Ellipse N A 39 4 Defined by σx σy correlation N A 2D Circular Error Probable CEP 50 Radius 0 589 σx σy CPE also called circular probable error 2D Twice ...

Page 12: ...t communication links to satellite uplink stations at Laurentides Canada Perth Australia Burum The Netherlands Santa Paula California Auckland New Zealand and Southbury Connecticut for rebroadcast via the geo stationary satellites The key to the accuracy and convenience of the C Nav Subscription Service is the source of SBAS corrections GNSS satellites transmit navigation data on several L Band fr...

Page 13: ...cked up by dedicated communications lines but in fact the network is sufficiently dense that the reference stations effectively act as back up for each other If one or several fail the net effect on the correction accuracy is not impaired There are two continuously running processing centers each receiving all of the reference site inputs and each with redundant communications links to the uplink ...

Page 14: ...subscription service The user pays a subscription which licenses the use of the service for a predetermined period of time Subscriptions can be purchased for any predetermined period of time and are available via a C Nav authorized representative or by contacting C Nav at cnav support cnavgnss com An authorized subscription will provide an encrypted key which is specific to the Serial Number of th...

Page 15: ...n C Nav signals from six 6 separate and independent geo stationary communication satellites The Satellite Based Augmentation System SBAS signals obtained from geo stationary communication satellites are selected by GPS L1 PRN ID The L band Identifiers for the tracking and decoding of these corrections by C Nav GNSS GPS Receivers are as follows ...

Page 16: ...the L band Communication Satellite Locator HTML utility http www cnavgnss com calculator Table 1 3 C Nav3050 Satellites Firmware Version 1 0 1 5 and Earlier Network Satellite ID Longitude Satellite Name Uplink Site Net 1 402 97 65W PAC E Laurentides 609 109E IND E Auckland 525 25E IND W Burum Net 2 358 142W PAC C Santa Paula 643 143 5E PAC W Perth 484 15 5W AOR E Southbury Table 1 4 C Nav3050 Sate...

Page 17: ... the sky to an elevation angle of 7º if possible Obstructions below 15º elevation generally are not a problem though this is dependent on satellite availability for the local region Avoid placing the antenna where more than 90º azimuth of the sky is obstructed When more than 90º of azimuth is shaded it is often still possible for the reciever to navigate however poor satellite geometry due to sate...

Page 18: ...n software with a recent satellite almanac to assess the impact on satellite visibility at your location An L Band Communication Satellite Locator tool is available on C Nav s website to aid in determining potential obstructions to C Nav Corrections Service Signals www cnavgnss com calculator A clear line of sight between the antenna and the local INMARSAT satellite is required to track C Nav sign...

Page 19: ... C Nav3050 Antennas require an Antenna Mounting Adaptor supplied The threads of all antenna mounting poles are 1 14 in size 2 Install the antenna with the antenna mounting pole in the predetermined location The pipe can either be welded to the mast for a more permanent installation or secured using stainless steel hose clamps In the figure below hose clamps have been used Figure 2 2 C Nav3050 Ante...

Page 20: ...C Nav Hardware Reference Guide 20 Figure 2 3 C Nav Antenna Mounting Pole Dimensions ...

Page 21: ... relation to attenuation loss at the frequencies in use For best performance do not allow more than 7dB 18dB for C Nav1000 of cable loss between the antenna and the receiver lower elevation satellite tracking suffers the most with more than 7dB insertion loss In line amplifiers suitable for all GNSS frequencies may be used to increase the length of the antenna cable but care should be exercised th...

Page 22: ...osen route to further detect any potential kinks bends or spots where the cable may become damaged 5 Secure the cable along the cable route with tape or zip ties and place a label at the GNSS receiver end of the cable for identification purposes 6 Connect the coaxial cable to the TNC connector on the GNSS receiver Ensure that any slack in the cable is neatly stowed and that the minimum bend radius...

Page 23: ...lightning install a properly grounded in line electrical surge suppressor between the GNSS receiver and antenna Install protective devices in compliance with local regulatory codes and practices Protective devices must pass DC power from the receiver to the antenna Contact C Nav Support or refer to Chapter 4 of this guide for more information on available lightning protection solutions GNSS Receiv...

Page 24: ...nce Guide 24 Chapter 3 C Nav DGNSS Hardware Specifications C Nav3050 C Nav3050 Receiver Figure 3 1 C Nav3050 Base Plate Dimensions Without Mounting Brackets Figure 3 2 C Nav3050 Base Plate Dimensions With Mounting Brackets ...

Page 25: ... MED 96 98 EC Table 3 2 C Nav3050 I O Messages Table 3 3 C Nav3050 Connector Assignments Control Commands Input Only C Nav proprietary commands contact C Nav Support for more information Differential Correction I O RTCM 2 3 and 3 0 RTCM types 1 3 and 9 SBAS WAAS EGNOS MSAS GAGAN and C Nav RTK Correction Data I O CMR CMR RTCM types 18 22 and 1001 1006 1009 1012 1014 1017 NCT types 0x5B 0x5C and 0x5...

Page 26: ...Hz Phase Centre see Figure 3 3 GPS L1 66mm 2 60in GPS L2 65mm 2 56in Polarization Right Hand Circular RHCP Pre Amplifier 39dB gain 2dB Noise Figure 2 6dB max Impedance 50 Ohms VSWR RL 2 0 1 14dB return loss Band Rejection 20dB 250MHz RF Power Handling 1 Watt Input Voltage 4 2 to 15 0 VDC Power Consumption 0 3W 46mA typical 50mA max 5VDC Vibration RTCA D0 160 E Section 8 Curve D Immersion MIL STD 8...

Page 27: ...d on NGS test results NGS does not currently provide GLONASS calibrated values To achieve the greatest level of accuracy the absolute phase center values must be incorporated into your processing Phase center information on all C Nav3050 antennae is found on the NGS website http www ngs noaa gov cgi bin query_cal_antennas prl Model NAV Figure 3 4 C Nav3050 Standard P N NAV82 001020 3001 Antenna Di...

Page 28: ...C Nav Hardware Reference Guide 28 Figure 3 5 C Nav3050 Airborne P N NAV82 001022 3001LF Antenna Dimensions Figure 3 6 C Nav3050 Base P N NAV82 001021 3001LF Antenna Dimensions ...

Page 29: ...wer elevation satellites are always more difficult to track There is a 5dB variation between 35º and 0º elevation factor 3x Figure 3 8 C Nav3050 Base Antenna Radiation Pattern Optimal antenna performance is realized at elevations greater than 35º There is a 11dB variation between 15º and 90º elevation factor 10x therefore lower elevation satellites are always more difficult to track There is a 9dB...

Page 30: ...C Nav Hardware Reference Guide 30 C Nav1010 C Nav1010 Receiver Figure 3 9 C Nav1010 Receiver without Mounting Brackets Figure 3 10 C Nav1010 Receiver with Mounting Brackets ...

Page 31: ...sing Dust MIL STD 810F Method 510 4 Procedure I Dust 6h 1750 175ft min blowing dust at 10 6 7g m at 25 C and 70 C Sand MIL STD 810F Method 510 4 Procedure 2 90 mins 18 29m s blowing sand at 2 2 0 5g m from front and back Precipitation MIL STD 810F Method 506 4 Procedure I 30min of 40mph 0 5mm 4 5mm droplets front and back Table 3 8 C Nav1010 I O Messages Table 3 9 C Nav1010 Connector Assignments N...

Page 32: ... Band Rejection 20dB 250MHz RF Power Handling 30dBm 1 W Input Voltage 2 5 24 VDC Power Consumption 0 2W 39mA 10mA 5VDC Cable Connector TNC Female Operating Temp 55 C to 85 C Altitude 70 000ft 21 336m Finish Skydrol resistant polyurethane Enamel with nickel plated base Material 6061 T6 Aluminum alloy base composite radome impact abrasion UV solvent skydrol resistant and fire retardant Weight 397g 1...

Page 33: ... Nav1010 L band Antenna Specifications 45 25 Part Number P N NAV82 001018 0001LF 45 25 Frequency 1525 1575 MHz INMARSAT StarFire Polarization Right Hand Circular RHCP Pre Amplifier 34dB gain min Noise Figure 2 9dB Impedance 50 Ohms Input Voltage 2 5 to 24 VDC Power Consumption 0 3W typical 60mA 10mA 5 0VDC Connector TNC Female 1 5 38mm 2 3 59mm 5 127mm ...

Page 34: ...adome impact abrasion UV solvent skydrol resistant and fire retardant Weight 5 2oz 146g Vibration 30g s Designed to FAA TSO C144 DO 160D D0 228 MIL C 5541 MIL I 45208A MIL STD 810 AND SAE J1455 Wind loading 135 MPH Figure 3 14 C Nav1010 L band Antenna Dimensions 45 25 Figure 3 15 C Nav1010 NAV82 001018 0001LF Antenna Mounting 45 25 Ø 0 20 5 1 Ø 0 385 9 78 100 Ø 3 5 88 9 1 344 34 12 ...

Page 35: ...ght Hand Circular RHCP Pre Amplifier 25dB gain min to coax end Noise Figure 1 0dB typical Impedance 50 Ohms Input Voltage 3 0 to 5 5 VDC Power Consumption 0 3W typical 8 5mA 10mA 3 6VDC Cable Connector TNC Female Cable Length 3 meters Operating Temp 55 C to 85 C Magnetic attachment shear strength 3Kg Typical Direct attachment force pull 4Kg Typical The quadrafilar antenna wind loading 200Km hr Min...

Page 36: ...C Nav Hardware Reference Guide 36 Figure 3 17 C Nav1010 NAV82 001003 0001LF Antenna and Mounts 25 Figure 3 18 C Nav1010 NAV82 001003 0001LF Radiation Pattern 25 ...

Page 37: ...C Nav Hardware Reference Guide 37 C Nav2050 C Nav2050 Receiver Figure 3 19 C Nav2050 Front View Figure 3 20 C Nav2050 Top View ...

Page 38: ...y 95 non condensing Table 3 14 C Nav2050 I O Messages Table 3 15 C Nav2050 Connector Assignments NCT Proprietary Data PVT Raw Measurement Satellite Messages Nav Quality Receiver Commands NMEA 0183 Messages Output Only ALM GBS GGA GLL GRS GSA GST GSV RMC VTG ZDA Proprietary NMEA 0183 Type Output Only SET Code Corrections RTCM 1 or 9 WAAS EGNOS MSAS GAGAN RTK Correction Data I O NCT Proprietary C Na...

Page 39: ...ure 3 22 C Nav2050 RS 232 to DP RS 422 MOXA Converter MOXTCC 801 The C Nav2050 chassis ground is internally connected to the power ground thus the Isolation Mount Adaptor may be needed when using DC power to prevent ground loops Figure 3 23 C Nav2050 Isolation Mount Adaptor ...

Page 40: ...mA 5VDC Cable Connector TNC Female Operating Temp 55 C to 85 C Altitude 70 000ft 21 336m Finish Fluid resistant Ultem UV stable Table 3 17 C Nav2050 Airborne Antenna Part Airborne Antenna Part Number 8250001 0 Frequency 1525 1585 MHz GPS L1 plus INMARSAT C Nav Correction Service 1217 1237 MHz GPS L2 L1 Phase Centre 58 7mm Polarization Right Hand Circular RHCP Pre Amplifier 39dB gain 2dB Noise Figu...

Page 41: ...lues must be incorporated into your processing Phase center information on this antenna is found on the antenna bottom and in the figure below Figure 3 24 C Nav2050 Standard Antenna Phase Center Dimensions Figure 3 25 C Nav2050 Antenna Dimensions inches mm Figure 3 26 C Nav2050 Airborne Antenna Dimensions ...

Page 42: ...performance is realized at elevations greater than 30º There is a 10dB variation between 0º and 90º elevation factor 10x therefore lower elevation satellites are always more difficult to track There is a 5dB variation between 35º and 0º elevation factor 3x Figure 3 28 C Nav2050 Antenna Mounting Pole Adaptor Dimensions ...

Page 43: ... coax end Noise Figure 1 0dB typical Impedance 50 Ohms Input Voltage 3 0 to 5 5 VDC Power Consumption 0 3W typical 8 5mA 10mA 3 6VDC Cable Connector TNC Female Cable Length 3 meters Operating Temp 40 C to 85 C Magnetic attachment shear strength 3Kg Typical Direct attachment force pull 4Kg Typical The quadrafilar antenna wind loading 200Km hr Minimum break over force foliage brushing 10Kgm Figure 3...

Page 44: ...ntenna LNA Wide band Response Optimal antenna performance is realized at elevations between 10º and 50º There is an 8dB variation between 40º and 90º elevation factor 6 3x therefore higher elevation satellites are always more difficult to track There is a 3dB variation between 10º and 0º elevation factor 2x ...

Page 45: ...C Nav Hardware Reference Guide 45 C Nav1000 C Nav1000 Receiver Figure 3 32 C Nav1000 Receiver Front View mm Figure 3 33 C Nav1000 Receiver Top View mm Figure 3 34 C Nav1000 Receiver Clearance Area ...

Page 46: ...Nav Hardware Reference Guide 46 Figure 3 35 C Nav1000 RS 422 to DP RS 232 MOXA Converter MOXTCC 801 C Nav1000 Display Figure 3 36 C Nav1000 Display Front View mm Figure 3 37 C Nav1000 Display Top View mm ...

Page 47: ... Specifications Input Voltage 4 0 13 VDC Input Current 50 60 mA Mechanical Specifications Enclosure PVC plastic Dimensions 128 mm square x 84 mm high 5 06 square x 3 33 high Weight 450 g 1 0 lb Mounting Thread 1 14 UNS 2B Connector TNC S Environmental Specifications Storage Temperature 40 C to 80 C Operating Temperature 30 C to 70 C Humidity 100 condensing Figure 3 38 MGL 4 H field Antenna Figure ...

Page 48: ...rence Guide 48 C Nav1000 Display Mounting Options Gimbal Mount Figure 3 40 Gimbal Mount Clearance Area Panel Mount Figure 3 41 Panel Mount Frame Dimensions mm Figure 3 42 Clearance Distance Behind the Display Panel Mount ...

Page 49: ...C Nav Hardware Reference Guide 49 Figure 3 43 Panel Mount Hole Dimensions mm Figure 3 44 Panel Mounting C Nav1000 Display Figure 3 45 C Nav1000 Display Panel Mounted ...

Page 50: ... 232C and RS 422 Data Connector DB9 Socket Data Port Baud Rate 2400 4800 or 9600 Baud Data Output Format RTCM SC 104 NMEA 0183 Data Input Protocol NMEA 0183 Power Specifications Item Specification Input Voltage 9 40 VDC Input Current 210 mA 12 VDC Power Consumption 2 5 W Power Connector Circular 2 pin Locking Plug Mechanical Characteristics Item Specification Display 2 line 16 character LCD Keypad...

Page 51: ...ardware Reference Guide 51 Figure 3 46 MBX 4 Receiver with Mounting Bracket Top Mounted Figure 3 47 Bottom view MBX 4 With Mounting Bracket Bottom Mounted Figure 3 48 IALA Receiver Mounting Bracket Dimensions ...

Page 52: ...tions Item Specification Frequency Range 283 5 325 kHz Gain 20 dB Pre Amplifier Integral Low Noise Amplifier Power Specifications Item Specification Input Voltage 10 14 VDC supplied by receiver Input Current 10 mA Mechanical Characteristics Item Specification Enclosure Fiberglass and threaded nylon Mounting Thread 1 14 UNS 2B Length 371 mm 14 6 Diameter 39 mm 1 5 Weight 176 g 0 39 lb Ground Wire L...

Page 53: ...are Reference Guide 53 C NaviGator II C NaviGator II Control and Display Unit Figure 3 49 C NaviGator II Display Front View Figure 3 50 C NaviGator II Side panel Connectors Figure 3 51 C NaviGator II Power Supply ...

Page 54: ...ctor Conxall Micro Con X 16282 2SG 311 Input Voltage 90 264 VAC Power 60 W Frequency 47 63 Hz Output Voltage 12 VDC 5 Operating Temperature 0º C 40º C Storage Temperature 20º C 65º C Humidity Operating 20 80 RH Storage 10 90 RH Connectors DC Power Conxall Micro Con X 17282 2PG 300 I O Ports 4 x 9 pin RS 232 DBM RS232 422 converter available Keyboard Mouse PS 2 LAN 1 x 100 1000 Mbps USB 2 x 2 0 VGA...

Page 55: ...ounting holes on the back of the C NaviGator Figure 3 53 RAM Double Socket Arms RAM D 201U C RAM Double Socket Arm SHORT 3 63 RAM D 201U RAM Double Socket Arm MEDIUM 6 88 RAM D 201U E RAM Double Socket Arm LONG 11 75 Choose from one of the arms above We recommend the medium length Figure 3 54 RAM 11 X 3 Base w Steel Reinforce RAM D 111B IN1U left RAM 3 68 DIA BASE w Steel Reinforce RAM D 202U IN1 ...

Page 56: ...av Hardware Reference Guide 56 Option 2 Desktop Stand Figure 3 55 Flat Screen Table Stand for C NaviGator II CHIFSB018BLK Option 3 Wall Mount Figure 3 56 Tilting VESA Wall Mount for C NaviGator II PEEST630 ...

Page 57: ...unt Use this adaptor if unable to secure display from the back Appropriate hardware is included to secure the C NaviGator to the Front Panel Mount prior to mounting Bolt thread size is M4 x 6mm Figure 3 57 Front Mount Kit for C NaviGator II SYNIWO 6710 7CRBR2 ...

Page 58: ...lling the C NaviGator to a rack The 19 Rack Mount takes up 7U of rack space and is 12 in height Appropriate hardware is included to secure the C NaviGator to the Rack Mount prior to mounting Bolt tread size is M4 x 6mm Figure 3 58 19 Mounting Kit for C NaviGator II SYNIWO 6710 7CBR9 ...

Page 59: ...erence Guide 59 Figure 3 59 C NaviGator II side USB port model Outline Diagram mm Both inside and outside mounting holes on vesa mount are M4 x 16mm in size Inside holes have 75mm spacing Outside holes have 100mm spacing ...

Page 60: ...60 Figure 3 60 C NaviGator II Cut out Diagram mm Cut out Panel includes hardware to facilitate bolting of the C NaviGator from the rear via M4 x 16mm sized bolts 6 places or from the front via M4 or 10 sized bolts 4 places rev A only ...

Page 61: ...C Nav Hardware Reference Guide 61 Figure 3 61 C NaviGator II rev A front USB port model Outline Diagram mm ...

Page 62: ...r as tap water may leave mineral spots Eyeglass cleaner can also be used if absolutely necessary however it may contain some alcohol which could dry out the screen and cause it to go cloudy Use a soft lint free anti static cloth such as eyeglass cloths Microfiber cloth Chamois or a clean cotton T shirt Dampen cleaning cloth with your solution and apply very gentle pressure using a circular motion ...

Page 63: ...C Nav Hardware Reference Guide 63 Chapter 4 Hardware Accessories Huber Suhner Lightning Protectors Model No 3403 17 0045 Specifications ...

Page 64: ...C Nav Hardware Reference Guide 64 Model No 3403 17 0045 Dimensions Figure 4 1 Huber Suhner Model No 3403 17 0045 ...

Page 65: ...C Nav Hardware Reference Guide 65 Model No 3402 17 0070 Specifications ...

Page 66: ...C Nav Hardware Reference Guide 66 Model No 3402 17 0070 Dimensions Figure 4 2 Huber Suhner Model No 3402 17 0070 ...

Page 67: ...C Nav Hardware Reference Guide 67 Huber Suhner Lightning Protector Mounting Instructions ...

Page 68: ...C Nav Hardware Reference Guide 68 ...

Page 69: ...C Nav Hardware Reference Guide 69 MOXA Converters TCC 80I TCC 80I Specifications ...

Page 70: ...C Nav Hardware Reference Guide 70 TCC 80I Dimensions Figure 4 3 Moxa TCC 80I Converter Dimensions TCC 82 ...

Page 71: ...C Nav Hardware Reference Guide 71 TCC 82 Specifications TCC 82 Dimensions Figure 4 4 TCC 82 Converter Dimensions ...

Page 72: ...C Nav Hardware Reference Guide 72 Times Microwave LMR400 Coaxial Cable LMR400 Specifications ...

Page 73: ...C Nav Hardware Reference Guide 73 Figure 4 5 LMR400 Attenuation vs Frequency Graph LMR400 Connectors Figure 4 6 LMR400 Connectors ...

Page 74: ...C Nav Hardware Reference Guide 74 ...

Page 75: ...f Coaxial Cable 2 Slide the heat shrink boot over the end of the cable followed by the ferrule Slide the first end of the prep strip tool over the end of the cable and rotate it clockwise Spin the tool until it spins freely Remove the tool and any residual plastic from the center conductor by rotating a knife around the circumference of the center conductor at the face of the core Figure 5 2 Prep ...

Page 76: ...l or a file Figure 5 3 Duburring Tool 4 Insert the cable into the opposite end of the prep strip tool and rotate clockwise until the tool spins freely Remove the tool If you are using a knife to complete this step be careful not to nick the braids Figure 5 4 Prep Strip Tool smaller end ...

Page 77: ...l it bottoms Trim the solder flush with the back of the pin with a knife Place a shim over the cable and up against the core a razor blade will do Now place the pin over the center conductor and heat the base of the pin with a soldering iron while monitoring the weep hole in the pin Remove the heat when you have seen the solder has flowed and wetted properly Figure 5 6 Soldering ...

Page 78: ...ion with scissors Figure 5 7 Connector Installation 8 Make sure that the connector is bottomed Bring the ferrule all the way up to the back of the connector Check the pin height with a pin gauge Crimp the ferrule close to the connector with a crimping tool DO NOT CRIMP TWICE A second crimp further back on the ferrule will end up compressing the core and cause degradation of performance Slide the b...

Page 79: ...oax cable terminated in a Snap and Seal F connector which is then joined to a female female adapter or barrel connector Figure 5 9 RG 59U Coaxial Cable 2 The next few photos will show how this barrel connector is used in a splice and how it is waterproofed for marine use Figure 5 10 Coaxial cable with Barrel Connector ...

Page 80: ...l adapter and was tightened The connector on the right has an O ring and is sealed to the coax internally with silicone grease Figure 5 11 Coax seal Roll 4 Coax Seal is a putty like material in tape form The white waxed paper keeps it from sticking to its self Figure 5 12 Coax seal Application ...

Page 81: ...ch winding The last wrap again comes straight back over the previous wrap without a diagonal The seal is slightly sticky and should be molded now by hand to remove any gaps and to ensure that all the wraps are blending together Figure 5 13 Coaxial Cable Fully Sealed 6 At some point the wrap will almost fuse together and the material may have to be cut away from the cable Figure 5 14 Coax seal Cros...

Page 82: ...outer jackets Product is non conductive non contaminating and non toxic and UV stable APPLICATIONS Provides a long lasting waterproof seal for coaxial cable fittings and many other connections Use for TV and radio antennas satellite dishes CATV wireless networks marine electronics feed lines radar and microwave installations and many other applications VISCOSITY ASTM D5 52 gm load 5 sec 7 0 10 0 m...

Page 83: ...mportant role in navigation meaning that the GNSS signals received must have good dispersion This dispersion reduces errors by providing wide angles for trilateration algorithms to more accurately compute position GNSS receiver parameters that affect accuracy are Elevation Mask Raising this mask prevents the receiver from using some low elevation satellites often a source of inaccurate positions D...

Page 84: ...ctions The interference if any is usually localized up to a half mile from the power line While strong magnetic fields have no effect on GNSS signals some computers and other electronic equipment radiate electromagnetic energy that can interfere with C Nav GNSS antennas or with the corrections data link If you suspect interference from a local magnetic field move the C Nav GNSS receiver away from ...

Page 85: ...ternal lithium battery has a 10 year life span You can assume the Lithium battery has failed when the receiver no longer retains configuration parameter setting changes Contact C Nav Support for replacement lithium batteries All C Nav proprietary software C Monitor C Setup will retain any port configuration parameters and GNSS configuration information when the power is turned off or removed ...

Page 86: ... Deg Degree DGPS Differential Global Positioning System DOP Dilution of Precision DTE Data Terminal Equipment ECDIS Electronic Chart Display Information System ECEF Earth Centered Earth Fixed EGNOS European Geostationary Navigation Overlay Service FCC Federal Communications Commission U S GAGAN GPS Aided Geo Augmented Navigation GDOP Geometric Dilution of Precision GIS Geographic Information Syste...

Page 87: ...tion LF Low Frequency Long Longitude LORAN Long Range Navigation System LNA Low Noise Amplifier MSAS MTSAT Satellite based Augmentation System MSL Mean Sea Level NAD27 North American Datum 1927 NAD83 North American Datum 1983 NASA National Aeronautics and Space Administration Nav Navigation NGS National Geodetic Survey NOAA National Oceanic and Atmospheric Administration U S P N Part Number PCM Pu...

Page 88: ...International System of Units SNR Signal to Noise Ratio SPS Standard Positioning Service SSR Spread Spectrum Radio SV Space Vehicle TDOP Time Dilution of Precision UHF Ultra High Frequency USB Universal Serial Bus USGS U S Geological Survey UTC Universal Time Coordinated VDOP Vertical Dilution of Precision VHF Very High Frequency WAAS Wide Area Augmentation System WADGPS Wide Area Differential Glo...

Page 89: ...rrents that are decoded by the receiver Patch or Microstrip antennas are most commonly used in GPS Antenna Phase Center APC is the point in an antenna where the GPS signal from the satellites is received The height above ground of the APC must be measured accurately to ensure accurate GPS readings The APC height can be calculated by adding the height to an easily measured point such as the base of...

Page 90: ... a system used in communication where selected strings of 0 s and 1 s are assigned definite meanings Binary Pulse Code Modulation is a two state phase modulation using a string of binary numbers or codes The coding is generally represented by 1 and 0 with definite meanings attached to each Bits per second see baud rate Broadcast Ephemeris is the ephemeris broadcast by the GPS satellites British St...

Page 91: ...s have been assigned These coordinates can then be held fixed and are used in other dependant surveys Control Segment is a worldwide network of GPS monitoring and control stations that ensure the accuracy of the GPS satellite orbits and operation of their atomic clocks The original control segment consists of control facilities in Diego Garcia Ascension Island Kwajalein and Hawaii with a master co...

Page 92: ...ision by applying these corrections to the satellite data received by the rover Dilution of Precision DOP is a class of measures of the magnitude of error in GPS position fixes due to the orientation of the GPS satellites with respect to the GPS receiver There are several DOP s to measure different components of the error Note this is a unit less value See also PDOP Doppler Aiding is a signal proc...

Page 93: ...onal error at a given point computed from the propagation of all errors affecting the position solution and expressed by its semi major and semi minor axis vectors of greatest and least magnitude and the covariance rotation angle in the reference coordinate system Two dimensional errors are typically propagated at one standard deviation 39 4 probability that the positioning lies on or within the e...

Page 94: ...on for the transfer from the C A code to the P code Horizontal Geodetic Network is a network for which the horizontal coordinate latitude and longitude of the control points in the network are determined as accurately as possible and heights are known only approximately Independent Baseline those baselines that provide a unique position solution for a given station Integer cycle Ambiguity is the u...

Page 95: ...d and observed sets of data by minimizing the sums of the squares of deviation between observed and expected values LEMO is a type of data or power connector Logging Interval is the frequency at which positions generated by the receiver are logged to data files Longitude long is the east west component of the coordinate of a point on the surface of the earth expressed as an angular measurement fro...

Page 96: ...nformation P code is the extremely long pseudo random code generated by a GPS satellite It is intended for use only by the U S military so it can be encrypted to Y code and then denies unauthorized users access Parity is a method of detecting communication errors by adding an extra parity bit to a group of bits The parity bit can be a 0 or 1 value so that every byte will add up to an odd or even n...

Page 97: ... its signals GPS receivers use PRNs to identify and lock onto satellites and to compute their pseudoranges Pseudorange is the apparent distance from the reference station s antenna to a satellite calculated by multiplying the time the signal takes to reach the antenna by the speed of light radio waves travel at the speed of light The actual distance or range is not exactly the same because various...

Page 98: ...ions from a SBAS such as C Nav Roving Receiver see rover Satellite Based Augmentation System SBAS this is a more general term which encompasses WAAS C Nav and EGNOS type corrections Satellite Constellation is the arrangement of a set of satellites in space Satellite Message is sometimes referred to as the Data D code A low frequency 50 Hz stream of data on both carriers L1 and L2 of the satellite ...

Page 99: ... 95 4 to 98 2 meaning that if 100 observations are taken between 95 and 98 of those observations will be within the 2dRMS where approximation 2ơ Universal Time Coordinated UTC a time standard maintained by the US Naval Observatory based on local solar mean time at the Greenwich meridian GPS time is based on UTC User Segment is the portion of the GPS system with major components that can be interfa...