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Hemisphere GPS Crescent V100 Series, Руководство пользователя

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Hemisphere GPS Crescent V100 Series Скачать руководство пользователя страница 59

52

2: Crescent V100 Operation

example, if you will be using the Crescent V100 on a high speed, 
maneuverable craft, it is essential that when gyro aiding in the 
Crescent V100 is first turned on and is used in an environment that 
has high dynamics for the first 5 to 10 minutes instead of sitting 
stationary.

With the Gyro enabled, the gyro is also used to update the post 
HTAU smoothed heading output from the moving base station RTK 
GPS heading computation. This means that if the value of HTAU is 
increased while the gyroid is enabled, there will be little to no lag in 
heading output due to vehicle maneuvers. Hemisphere GPS’ GPS 
Technical Reference includes information on setting an appropriate 
HTAU value for your application.

Time Constants

The Crescent V100 incorporates user-configurable time constants 
that can provide a degree of smoothing to the heading, course over 
ground, and speed measurements. Depending on the expected 
dynamics of the vessel, you may wish to adjust these parameters. 
For instance, if the vessel is very large and is not able to turn 
quickly or would not pitch quickly, increasing this time is 
reasonable. The resulting values would have reduced “noise,” 
resulting in consistent values with time. However, artificially 
increasing this value such that it does not agree with a more 
dynamic vessel could create a lag in measurements. Formulas for 
determining the level of smoothing are located in Hemisphere GPS’ 
GPS Technical Reference manual. If you are unsure on how to set 
this value, it is best to be conservative and leave it at the default 
setting.

The heading time constant allows you to adjust the level of 
responsiveness of the true heading measurement provided in the 
$HEHDT message. The default value of this constant is 2.0 seconds 
of smoothing when the gyro is enabled. The gyro by default is 
enabled, but can be turned off. By turning the gyro off, the 
equivalent default value of the heading time constant would be 

 

0.5 seconds of smoothing. This is not done automatically, and 
therefore must be entered manually by the user. Increasing the 

Содержание Crescent V100 Series

Страница 1: ...Crescent V100 Series User Guide Part No 875 0174 000 Rev A1 ...

Страница 2: ... language or computer language in any form or by any means electronic mechanical magnetic optical chemical manual or otherwise without the prior written permission of Hemisphere GPS Inc Trademarks Hemisphere GPS and the Hemisphere GPS logo Satloc and the Satloc logo Mapstar Air Star Outback Guidance and eDrive are trademarks of Hemisphere GPS Other trademarks are the properties of their respective...

Страница 3: ......

Страница 4: ...sphere GPS approved service center immediately of any claimed defect Repairs shall be made through a Hemisphere GPS approved service center only EXCLUSIONS Hemisphere GPS does not warrant damage occurring in transit or due to misuse abuse improper installation neglect lightning or other electrical discharge or fresh salt water immersion of Products Repair modification or service of Hemisphere GPS ...

Страница 5: ...PS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES WITHOUT LIMITING THE FOREGOING HEMISPHERE GPS SHALL NOT BE LIABLE FOR ANY DAMAGES OF ANY KIND RESULTING FROM INSTALLATION USE QUALITY PERFORMANCE OR ACCURACY OF ANY PRODUCTS GOVERNING LEGISLATION To the greatest extent possible this warranty shall be governed by the laws of the State of Arizona In the event that any provision hereof is held to...

Страница 6: ...scent V100 Alignment 7 Mounting Options 9 Fixed Base Mounting 9 Pole and Rail Mount 16 Powering the Crescent V100 28 Power Considerations 28 Connecting to a Power Source 28 Electrical Isolation 29 Connecting the Crescent V100 to External Devices 30 Interfacing the Crescent V100 30 Power Data Cable Pin Out 30 Serial Port Interface 34 Serial Port Configuration 35 Interfacing to a PC 35 Default Param...

Страница 7: ...nding the Crescent V100 48 Moving Base Station RTK 48 Supplemental Sensors 49 Tilt Aiding 50 Gyro Aiding 51 Time Constants 52 Alarm Functionality 54 Alarm Signal 54 Watchdog 54 Common Commands and Messages 55 APPENDIX A TROUBLESHOOTING 61 APPENDIX B SPECIFICATIONS 67 APPENDIX C PARTS LIST 73 Index 77 ...

Страница 8: ...100 is an integrated system that houses the Crescent Vector OEM module dual GPS antennas DGPS beacon module and H field beacon antenna Crescent V110 version only power supply single axis gyro and a tilt sensor The gyro and tilt sensor are present to improve system performance and to provide backup heading information in the event that a GPS heading is not available due to signal blockage Crescent ...

Страница 9: ...tions from Space Based Augmentation Systems SBAS or its optional internal SBX beacon demodulator The Crescent V100 also features Hemisphere GPS exclusive COAST software that enables Hemisphere GPS receivers to utilize old differential GPS correction data for 40 minutes or more without significantly affecting the quality of positioning When using COAST the Crescent Vector OEM is less likely to be a...

Страница 10: ...1 INSTALLATION Mounting Locations Mounting Options Powering the Crescent V100 Connecting the Crescent V100 to External Devices ...

Страница 11: ... antenna which is located on the end opposite the recessed arrow on the underside of the enclosure When choosing a location to mount the antenna please ensure that there is a clear view of the sky available to the Crescent V100 This will ensure that GPS and SBAS satellites are not masked by obstructions potentially reducing system performance It is important to locate any transmitting antennas awa...

Страница 12: ...intenance and accessibility In addition ensure that the antenna is higher than the highest metal object on the vessel If a radar system is present mount the antenna outside the path of the radar beam The V110 s internal beacon receiver calculates a Signal to Noise Ratio SNR measured in decibels dB that indicates the receiver s performance The SNR is height of the signal above the noise floor The h...

Страница 13: ...nd most common method is to mount the Crescent V100 enclosure pointing in a direction parallel to the axis of the boat facing the bow This mounting configuration provides the ability for the Crescent V100 system to output both heading and the pitch of the vessel If a gyrocompass is present onboard this could be used as truth to calibrate the physical heading of the Crescent V100 and its correspond...

Страница 14: ...f needed Consult Hemisphere GPS GPS Technical Reference manual for further information Crescent V100 Alignment The top of the Crescent V100 enclosure incorporates a pair of sight design features for assisting antenna alignment The sights will help you to align the enclosure with respect to an important feature on your vessel See Figure 1 1 and Figure 1 2 on page 7 and page 8 To use the sights cent...

Страница 15: ...el such as a gyrocompass you may use its data to correct for a bias in Crescent V100 alignment within the Crescent V100 software configuration Alternatively you may wish to physically adjust the heading of the Crescent V100 so that it renders the correct heading measurement however adding a software offset is an easier process ...

Страница 16: ... on page 5 shows the following features for the fixed base Six holes for mounting onto the Crescent V100 enclosure Four slots used for fastening the mounted enclosure to the vessel Four tunnels that allow you to route the cable outside the base and along the mounting surface Two small keys that aid the alignment of the base to the enclosure Channel through the mount for the power data cable The sl...

Страница 17: ... the surface of the plate beneath the Crescent V100 system Alternatively you may wish to route the power data cable through the mounting surface rather than bringing it out through one of the tunnels See Figure 1 3 Figure 1 3 Fixed mount base Figure 1 4 provides a bottom view of the fixed mount base Figure 1 4 Bottom view of fixed mount base ...

Страница 18: ...equire roll install the Crescent V100 parallel with the vessel s axis See Figure 1 5 Figure 1 5 Crescent V100 s parallel perpendicular installation Choose a location that meets the mounting location requirements Using the fixed base as a template mark and drill the mounting holes as necessary for the mounting surface Perpendicular roll installation Parallel pitch installation Recessed arrow locate...

Страница 19: ...e To install the Crescent V100 using the fixed base 1 Insert either end of the power data cable through the center of the fixed base See Figure 1 6 and Figure 1 7 on page 12 and page 13 Figure 1 6 Running cable through fixed base mount ...

Страница 20: ...ctor keyway of the cable to the key of the connector mounted on the Crescent V100 enclosure See Figure 1 8 3 Insert the cable mount connector into the bulkhead connector aligning the locking ring at the same time See Figure 1 8 Figure 1 8 Power Data cable and keyway Connector Keypad Connector Key ...

Страница 21: ...the base that just fit into two holes of the Crescent V100 enclosure 6 Once you have aligned the base use a screwdriver fitted with the supplied Torx T20 bit to fasten the base to the enclosure using the supplied screws These screws self tap a thread in the blind screw holes of the enclosure Fasten the screws firmly but be careful not to strip the thread Note The base is not intended to be removed...

Страница 22: ...t V100 Series User Guide 15 Figure 1 10 and Figure 1 11 show the location of the screw holes Figure 1 10 Fastening the fixed base to the Crescent V100 Figure 1 11 Fastening the fixed base to the Crescent V100 ...

Страница 23: ... supplied a hex jam nut and washer These are used to secure the antenna in a particular direction without bottoming out the system on the threaded pole Additionally the nut and washer distributes forces associated with vibration onto the bottom surface of the Crescent V100 pole mount Note We do not supply the mounting surface hardware You will need to supply the appropriate fastening hardware requ...

Страница 24: ... Choose a location that meets the mounting location requirements Mark and drill the mounting holes as necessary for the threaded pole Alternatively you may rail mount the Crescent V100 with appropriate hardware Pole mount installation and preparation You will need to supply the pole or rail mount hardware that you wish to use To install the pole mount 1 Once you have installed the pole or rail mou...

Страница 25: ...le mount the cable must first be run through the center of the pole mount base from top to bottom through the pole then through any bulkheads as needed The power data connector is too large to fit through the threaded portion of the pole mount base See Figures 1 13 to 1 15 on page 19 to page 20 Note Be sure to have some slack to move the cable in and out of the pole mount by a few inches centimete...

Страница 26: ...Crescent V100 Series User Guide 19 Figure 1 13 Running cable through the pole base Figure 1 14 Running cable through the pole base ...

Страница 27: ...20 1 Installation Figure 1 15 Running cable through the pole base ...

Страница 28: ...scent V100 Series User Guide 21 Once you have routed the cable correctly through the pole mount base and the mounting pole the mounting assembly should look like Figure 1 16 Figure 1 16 Completed cable run ...

Страница 29: ...stallation Mounting to pole mount thread To mount the pole mount base 1 Thread the pole mount base onto the pole mount four to five full turns See Figure 1 17 Figure 1 17 Threading the pole base onto the mount ...

Страница 30: ...eaded onto mount To connect the cable to the Crescent V100 1 Fasten the cable to the Crescent V100 connector The connector on the receiver enclosure has a key and the cable mount connector has a keyway The key and keyway need to align as you insert the cable mount connector into the bulkhead connector Note The locking ring on the cable mount connector may need to be aligned as it is inserted into ...

Страница 31: ...e locking ring clockwise until it locks once the cable mount connector is seated fully You will feel the ring click when it is locked See Figure 1 19 and Figure 20 Figure 1 19 Power data cable key and keyway Figure 1 20 Connected power data cable Connector Key Connector Keypad ...

Страница 32: ...closure 3 Use a screwdriver fitted with the supplied Torx T20 bit to fasten the base to the enclosure using the supplied screws These screws self tap a thread in the blind screw holes of the enclosure Fasten the screws firmly but be careful not to strip the thread See Figure 1 21 Figure 1 21 Fastening the pole base to the Crescent V100 Note The base is not intended to be removed and re fastened fr...

Страница 33: ...n the Crescent V100 See Figure 1 22 Figure 1 22 Threading the lock nut against the pole base 5 Orient the Crescent V100 using the sights on the top of the enclosure 6 Use an adjustable wrench to tighten the lock nut against the Crescent V100 while ensuring accurate alignment of the antenna system See Figure 1 23 Figure 1 23 Locking the Crescent V100 once aligned ...

Страница 34: ...o not run the cable through door or window jams Keep the cable away from rotating machinery Do not bend excessively or crimp the cable Secure along the cable route using plastic tie wraps as necessary Note The locking nut will need to be tightened against the pole mount base tightly To ensure that the locking nut is not over tightened periodically check to see how secure the antenna system is as m...

Страница 35: ...rity protection but will not operate with reverse polarity Connecting to a Power Source The first step to powering the Crescent V100 is to terminate the wires of the power cable as required There are a variety of power connectors and terminals on the market from which to choose depending on your specific requirements Table 1 1 Power requirements Input Voltage Input current Input power 10 to 36 VDC...

Страница 36: ...stem on by applying power to it The Crescent V100 smart antenna will start when an acceptable voltage is applied to the power leads of the extension cable Be careful not to provide a voltage higher than the input range as this will damage the receiver Electrical Isolation The Crescent V100 features a power supply that is isolated from the communication lines Further the PC ABS plastic enclosure is...

Страница 37: ...0 meters 32 8 yards cable through your equipment dealer or alternatively bring the cable into a break out box that incorporates terminal strips within the vessel To lengthen the serial lines inside the vessel ensure that you use 20 gauge twisted pairs and minimize the additional wire length The RS 422 signal should be used for longer cable runs as compared to the RS 232 ports as it is more resista...

Страница 38: ...F SHIELDED DRAIN 1 BLK RED 18 18 2 1 Power GRND Power input 2 BLK with BLU stripe BLU 24 24 4 3 RS 232 port A RX RS 232 port A TX 3 GRY 24 12 Sig GRND 4 BLK with GRN stripe GRN 24 24 11 6 RS 422 port A RS 422 port A 5 BLK with BRN stripe BRN 24 24 8 7 RS 232 port B RX RS 232 port B TX 6 YEL with BLK stripe YEL 24 24 15 16 RS 422 port B RS 422 port B 7 WHT with RED stripe WHT 24 24 14 13 Alarm Alar...

Страница 39: ...30M rear view Table 1 3 on page 33 provides cable IO X CIRC F 18 PT 15 m or 30m cable connector pin out Note PPS is supported on pins 17 and 18 on the Crescent V100 V110 but not connected in the standard cables 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ...

Страница 40: ...t A RX RS232 BLK with BLU stripe 24 AWG 5 Not connected 6 Port A RS422 GRN 24 AWG 7 Port B TX RS232 BRN 24 AWG 8 Port B RX RS232 BLK with BRN stripe 24 AWG 9 Not connected 10 RF shield drain Bare 24 AWG 11 Port A RS422 BLK with GRN stripe 24 AWG 12 Signal ground GRY 24 AWG 13 Alarm 1 WHT 24 AWG 14 Alarm 2 WHT with RED stripe 24 AWG 15 Port B RS422 YLW with BLK stripe 24 AWG 16 Port B RS422 YLW 24 ...

Страница 41: ...two serial port levels supported by the Crescent V100 RS 232 Interface Level The Crescent V100 features two full duplex bi directional RS 232 serial ports In addition to outputting data these ports are used for firmware upgrades Data output from both RS 232 Ports A and B are also output on the RS 422 ports RS 422 Interface Level The RS 422 standard allows for one device to communicate with many ot...

Страница 42: ... rate The messages that you configure each port to output and the rate of the port will be the same for both RS 232 and RS 422 interface levels For instance the RS 232 Port A and RS 422 Port A output the same data messages at the same baud rate If the baud rate or messages for the RS 422 port need to be changed this needs to be commanded through the RS 232 port Both RS 232 and RS 422 output signal...

Страница 43: ...make sure that the transmit data output from the Crescent V100 is connected to the data input of the other device The signal grounds must also be connected Table 1 5 Port B DB9 RS 232 interface configuration Pin Wire Color Signal 2 Brown Port B transmit RS 232 3 Black brown striped Port B receive RS 232 5 Grey Signal ground Note For successful communications the baud rate of the Crescent V100 seri...

Страница 44: ...er device unless it is able to send configuration commands to the V100 Since the V100 uses proprietary NMEA 0183 commands for control over its configuration the vast majority of electronics will not be able to configure its settings unless the other device has a terminal setting where you can manually issue commands Default Parameters This section outlines the default parameters of the Crescent V1...

Страница 45: ...K with BRN Port A RS 422 output only 19200 GPGGA GPVTG GPGSV GPZDA GPHDT GPROT 1 Hz GRN BLK with GRN Port B RS 422 output only 19200 GPGGA GPVTG GPGSV GPZDA GPHDT GPROT 1 Hz YLW BLK with YLW Power 10 36 V RED BLK Note 1 Hz is the default update rate for NMEA messages 10 Hz is the standard maximum rate but a subscription can be purchased to upgrade the output rate to 20 Hz Note that NMEA GPGST GPGS...

Страница 46: ... 20 Hz GPZDA Time and date 0 20 Hz GPGRS GNSS range residuals 0 20 Hz GPGSA GNSS DOP and active satellites 0 1 Hz GPGST GNSS pseudorange error statistics 0 1 Hz GPGSV GNSS satellites in view 0 1 Hz GPGLL Geographic position latitude longitude 0 20 Hz GPRRE Range residual message 0 20 Hz GPHDG Command to provide magnetic deviation and variation for calculating magnetic or true heading 0 20 Hz GPHDT...

Страница 47: ...djustable They are fixed with an 8 n 1 configuration Table 1 8 Other sentences Sentence Description GPHDM Magnetic heading based on RTK derived GPS and magnetic declination J4STRING Output GPGGA GPVTG GPGSA and GPZDA 1Hz max PCSI 1 Beacon status PSAT HPR Proprietary NMEA sentence that provides the heading pitch roll information and time in a single message PSAT INTLT Proprietary NMEA sentence that...

Страница 48: ... rates Baud Rates 4800 9600 19200 38400 Table 1 10 Correction age and elevation mask defaults Max DGPS age Elevation mask 2700 seconds 5 Table 1 11 Default differential mode Crescent V100 differential mode Crescent V110 differential mode SBAS WAAS EGNOS Beacon ...

Страница 49: ...2 1 Installation The internal beacon module operates in full automatic mode by default as shown in the table 1 12 Table 1 12 Frequency selection Frequency Selection MSK rate selection Automatic Automatic ...

Страница 50: ...2 CRESCENT V100 OPERATION GPS Overview Understanding the Crescent V100 ...

Страница 51: ...guration 8 N 1 GPS Operation The GPS engine is always operating regardless of the DGPS mode of operation The following sections describe the general operation of the Crescent V100 s internal GPS engine Automatic Tracking The GPS engine within the Crescent V100 automatically searches for GPS satellites acquires the signals and manages the navigation information required for positioning and tracking...

Страница 52: ...alculate the geographic location the GPS receiver uses a complex algorithm incorporating satellite locations and ranges to each satellite Reception of any four or more of these signals allows a GPS receiver to compute 3 dimensional coordinates Differential Operation The purpose of differential GPS DGPS is to remove the effects of SA atmospheric errors timing errors and satellite orbit errors while...

Страница 53: ... is able to operate in manual or automatic tuning mode or using database mode will select the closest station in compliance with IEC 61108 4 standards e Dif Extended differential e Dif is an optional mode in which the receiver can perform with differential like accuracy for extended periods without the expense or uncertainty of an external differential service It models the effects of ionosphere t...

Страница 54: ...er it depends on how tolerable your application is to drift as e Dif can be used for longer periods Our testing has shown that accuracy will often be better than 1 meter 1 09 yards virtually 95 of the time after 30 minutes of e Dif operation ...

Страница 55: ...urement is computed when the antenna is installed parallel to the fore aft line of the vessel The secondary antenna is directly above the arrow Moving Base Station RTK The Crescent V100 s internal GPS engines use both the L1 GPS C A code and carrier phase data to compute the location of the Secondary GPS antenna in relation to the Primary GPS antenna with a very high sub centimeter level of precis...

Страница 56: ...igure 2 1 Figure 2 1 Secondary antenna s search volume Supplemental Sensors Integrated inside the Crescent V100 are a tilt sensor and gyro which are enabled by default Each supplemental sensor may be turned on or off individually however the full functionality of the Crescent V100 system is realized only when all are used Each supplemental sensor is inside the Crescent V100 enclosure mounted on th...

Страница 57: ...he status of these sensors Tilt Aiding The Crescent V100 s internal tilt sensor accelerometer is enabled by default is factory calibrated and constrains the RTK heading solution beyond the volume associated with just a fixed antenna separation since the Crescent V100 knows the approximate inclination of the secondary antenna with respect to the primary The search space defined by the tilt sensor w...

Страница 58: ...g for a short period depending on the roll and pitch of the vessel ideally seeing the system through to reacquisition The gyro will provide an alternate source of heading accurate to within 1 for up to 3 minutes in times of GPS loss for either antenna If the outage lasts longer than three minutes the gyro will be deemed to have drifted too far and the Crescent V100 will begin outputting null field...

Страница 59: ...ynamics of the vessel you may wish to adjust these parameters For instance if the vessel is very large and is not able to turn quickly or would not pitch quickly increasing this time is reasonable The resulting values would have reduced noise resulting in consistent values with time However artificially increasing this value such that it does not agree with a more dynamic vessel could create a lag...

Страница 60: ... Increasing the time constant will increase the level of heading smoothing The course over ground COG time constant allows you to adjust the level of responsiveness of the COG measurement provided in the GPVTG message The default value of this constant is 0 0 seconds of smoothing Increasing the time constant will increase the level of COG smoothing COG is computed using the primary GPS engine only...

Страница 61: ...hod employed by the user When the heading is valid the relay contacts remain closed completing the circuit as an indication that the Crescent V100 is operational Alarm Signal There are two wires 24 AWG multistrands on the output cable that are used for the external alarm function The color codes for the two wires are white and white red stripe and are the output of a relay When this relay closes t...

Страница 62: ...nal 20 Hz with a subscription The GPGSA GPGST GPGSV and GPRRE messages are only output at 1 Hz Table 2 1 Applications Command Description JAPP Primary application 1 Table 2 2 Differential commands Command Description JDIFF Differential mode JLIMIT DGPS LIMIT distance JAGE Max DGPS COASTTM age 6 to 8100 seconds JWAASPRN Configure for specific SBAS PRN numbers JGEO Query WAAS for current location an...

Страница 63: ...S pseudo range error statistics GPGSV GMSS satellites in view GPRMC Recommended minimum specific GNSS data GPRRE Range residual message GPVTG COG and ground speed GPZDA Time and date GPGBS Satellite fault detection used for RTCM GPGNS GNSS fix data GPGRS GNSS range residual PCSI 1 Beacon status GPHDG Provides magnetic deviation and variation for calculating magnetic or true heading GPHDT RTK deriv...

Страница 64: ...TT TILTAID Enable disable accelerometer pre calibrated JATT TILTCAL Calibrate accelerometer JATT GYROAID Enable disable gyro JATT LEVEL Enable disable level operation JATT HTAU Set query heading time constant 0 0 to 3600 0 seconds JATT PTAU Set query pitch time constant 0 0 to 3600 0 seconds JATT HRTAU Set query time constant 0 0 to 3600 0 seconds JATT COGTAU Set query COG time constant 0 0 to 360...

Страница 65: ... Description JATT CSEP Query antenna separation JAATT MSEP Manually set query antenna separation JASC Dx Turn on off diagnostics message x JQUERY GUIDE Query accuracy acceptableness JRESET Reset unit s configuration to firmware defaults JSAVE Save session s configuration changes JSHOW Shows current configuration JOFF Turn off all data messages JT Query receiver type JI Query unit s serial number a...

Страница 66: ...ssage Description JBIN1 GPS position JBIN2 GPS DOP s JBIN80 SBAS JBIN93 WAAS ephemeris data JBIN94 Ionosphere and UTC conversion parameters JBIN95 Ephemeris JBIN96 Code and carrier phase JBIN97 Process statistics JBIN98 Satellite and almanac JBIN99 GPS diagnostics ...

Страница 67: ......

Страница 68: ...APPENDIX A TROUBLESHOOTING ...

Страница 69: ...36 VDC Check current restrictions imposed by power source minimum available should be 1 0 A No data from Crescent V100 Check receiver power status to ensure that the receiver is powered an ammeter can be used for this Verify that desired messages are activated this can be done through PocketMAX or with JSHOW in any terminal program Ensure that the baud rate of the Crescent V100 matches that of the...

Страница 70: ...he baud rate for all devices or reduce the amount of data being output No GPS lock Verify Crescent V100 has a clear view of the sky Verify the lock status of GPS satellites this can be done with PocketMAX No heading or incorrect heading value Check CSEP value is fairly constant without varying more than 1 cm 0 39 in Larger variations may indicate a high multipath environment and require moving the...

Страница 71: ...ate of the external source Verify the pin out between the RTCM source and the RTCM input port transmit from the source must go to receive of the RTCM input port and grounds must be connected Ensure corrections are being transmitted to the correct port Using the JDIFF PORTB command on Port A will cause the receiver to expect the corrections to be input through Port B No SBAS lock Verify Crescent V1...

Страница 72: ...H command forces the Crescent V100 to acquire a new heading solution unless gyro is enabled Enable GYROAID as this will give heading for up to 3 minutes in times of GPS signal loss Enable TILTAID to reduce heading search times Monitor the number of satellites and SNR values for both antennas within PocketMAX At least 3 satellites should have SNR values above 20 Table A 1 Troubleshooting Symptom Po...

Страница 73: ......

Страница 74: ...APPENDIX B SPECIFICATIONS ...

Страница 75: ...32 and 2 half duplex RS 422 Baud Rate 4800 to 38400 Correction I O protocol RTCM SC 104 L Dif Hemisphere GPS proprietary Data I O protocol NMEA 0183 Crescent binary L Dif Hemisphere GPS proprietary Heading warning I O Open relay system indicates invalid heading Table B 2 Beacon specifications V110 version Item Specification Channels 2 channel parallel tracking Frequency 283 5 to 325 kHz Operating ...

Страница 76: ...uracy 0 6 m 0 66 yd 95 confidence DGPS 2 5 m 2 7 yd 95 confidence autonomous no SA Heading accuracy 0 30 RMS Pitch roll accuracy 1 RMS Rate of turn 90 s max Start up time 60 s typical Heading fix 20 s Satellite reacquisition 1 s Compass safe distance 50 mm 1 97 in Note Depends on multipath environment number of satellites in view satellite geometry baseline length for local services and ionospheri...

Страница 77: ... L x 6 3 in W x 7 1 in H Weight 1 50 kg 3 3 lb Table B 5 Power specifications Item Specification Input voltage 10 to 36 VDC Power consumption 5 0 W Current consumption 360 mA 12 VDC Isolation Power supply isolated from serial ports Reverse polarity protection Yes Table B 6 Environmental specifications Item Specification Storage temperature 40 C to 85 C 40 F to 185 F Dry and damp heat Operating tem...

Страница 78: ... Guide 71 Note This is the minimum safe distance measured when the product is placed in the vicinity of the steering magnetic compass The ISO 694 defines vicinity relative to the compass as within 5 meter 5 47 yards separation ...

Страница 79: ......

Страница 80: ...APPENDIX C PARTS LIST ...

Страница 81: ...1106 603 1002 Base mount Hemisphere GPS logo Base mount without branding One 627 1109 603 1001 Pole mount Hemisphere GPS logo Pole mount without branding One 804 0035 Crescent V100 One 804 0040 Crescent V110 One Note The kit will include one of the Crescent V100 or Crescent V110 depending on what you ordered Table C 2 Accessories Part number Description Quantity 051 0157 15 m V MV cable cable is o...

Страница 82: ...Crescent V100 Series User Guide 75 Table C 3 Documentation Part number Description Quantity Warranty page One 875 0174 Crescent V100 Series User Guide One 875 0185 Crescent V100 Series User Guide One ...

Страница 83: ......

Страница 84: ...ng 44 Differential Operation 45 e Dif 46 47 GPS Operation 44 Receiver Performance 44 45 RTK 47 M Mounting Location 8 27 Beacon Reception 5 Crescent V100 Alignment 7 8 Environmental Consider ations 6 GPS Reception 4 Mounting Orientation 6 7 Mounting Options 4 27 Fixed Base Mounting 9 16 Pole and Rail Mount 16 17 Rail Mount 25 27 P Powering the Crescent V100 28 29 R RS 232 30 34 35 36 68 RS 232C 56 ...

Страница 85: ......

Страница 86: ...www hemispheregps com e mail info hemispheregps com ...

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