Crescent V100 Series
Contents
1. 3 Mounting Location 00 00 ce eee omo sas 4 GPS Reception 4 Beacon Reception 5 Crescent V100 Environmental Considerations 6 Mounting Orientation 6 Crescent V100 Alignment 7 Mounting Options 000 eee 9 Fixed Base Mounting 9 Pole and Rail Mount 16 Powering the Crescent V100 2 0000 2c neues 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 Parameters 37 2 CRESCENT V100 OPERATION 43 GPS Overview a a hein ed ee RRA 44 GPS Operation 44 Differential Operation 45 Understanding the Crescent V100 0 22008 48 Moving Base Station RTK 48 Supplemental Sensors 49 Tilt Aiding 50 Gyro Aiding 51 Time Constants 52 Alarm Functionality lt lt lt 0 lt lt o 54 Alarm Signal 54 Watchdog 54 Common Commands and Messages 0 0 0 55 APPENDIX A TROUBLESHOOTING 6Ll1 APPENDIX B SPECIFICATIONS 67 APPENDIX C PARTS LIST 73 Crescent V100 Series User Guide OVERVIEW Welcome to the Crescent V100 V110 GPS Compass User Guide and congratulations on purchasing this high performance GPS compass The Crescent V100 is based upon Hemisphere GPS exclusive Crescent branded application specific integrated circuit ASIC computer2. 875 0174 Crescent V100 Series User Guide 875 0185 Crescent V100 Series User Guide 75 INDEX A Alarm Functionality 54 Alarm Signal 54 Watchdog 54 Beacon Operation 46 Common Commands and Mes sages 55 59 Connecting the Crescent V100 to External Devices 30 42 Default Parameters 37 42 Interfacing to a PC 35 37 RS 232 Interface Level 34 RS 422 Interface Level 34 GPS Overview 44 47 Automatic SBAS WAAS EG NOS MSAS and oth ers Tracking 46 Automatic Tracking 44 Differential Operation 45 e Dif 46 47 GPS Operation 44 Receiver Performance 44 45 RTK 47 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 Powering the Crescent V100 28 29 RS 232 30 34 35 36 68 RS 232C 56 77 Crescent V100 Series User Guide RS 422 30 34 35 37 56 68 Serial Port Configuration 35 Understanding the Crescent V100 48 53 Gyro Aiding 51 52 Moving Base Station RTK 48 49 Supplemental Sensors 49 50 Tilt Aiding 50 Time Constants 52 53 S gt 4 a F a L o_o J I gt www hemispher e mail info hemisph
3. 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 troposphere and timing errors for extended periods by computing its own set of pseudo corrections e Dif may be used anywhere geographically and is especially useful where SBAS networks have not yet been installed such as South America Africa Australia and Asia The positioning performance of the receiver unit is dependent upon the rate at which the environmental modeling of e Dif and the environmental errors diverge The more that e Dif is able to model the errors correctly the longer that e Dif will provide reliable accurate positioning The accuracy of positioning will have a slow drift that limits use of e Dif to approximately 30 to 40 minutes 46 Crescent V100 Series User Guide however 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 47 2 Crescent V100 Operation UNDERSTANDING THE CRESCENT V100 The purpose of the Crescent V100 is to provide accurate reliable heading and position information at high update rates To accomplish this task the Crescent V100 uses a high performance GPS engine and two multipath resistant a
4. beacon receiver as the correction source you will need to consider the possible mounting locations from a perspective of ambient noise within the beacon band The following list provides some general guidelines for deciding upon a location with respect to maximizing beacon performance e Ensure that the antenna is as far as possible from all other equipment that emits Electromagnetic Interference EMI including DC motors alternators solenoids radios power cables display units and other electronic devices e If you are installing the antenna on a vessel mount the V110 as high as possible considering maintenance and accessibility In addition ensure that the antenna is higher than the highest metal object on the vessel e Ifa 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 higher the SNR the better your beacon receiver is demodulating the signal The optimum antenna location will be a position where your average SNR is highest You should turn on all accessories that you intend to use during normal operation when locating the best position for the antenna By monitoring the SNR you can determine the optimum location with respect to beacon reception The SNR is available in the CRMSS NMEA message
5. compute an appropriate position within 5 meters 5 47 yards Since there is some error in the GPS data calculations the 44 Crescent V100 Series User Guide Crescent V100 also tracks a differential correction The Crescent Crescent V100 uses these corrections to improve its position to less than 1 meter 1 09 yards The Crescent V100 has an accuracy of 2 5 meters 2 7 yards with no differential and 60 centimeters 23 6 inches with differential There are two main aspects of GPS receiver performance e Positioning e Satellite acquisition quality When the Crescent V100 is properly positioned the satellites transmit coded information to the antenna on a specific frequency that allows the receiver to calculate a range to each satellite GPS is essentially a timing system The ranges are calculated by timing how long it takes for the GPS signal to reach the GPS antenna To calculate 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 enhancing system integrity Autonomous positioning capabilities of the Crescent V100 will result in positioning accuracies of 2 5 meters 2 73 yards 95 In ord
6. 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 fields in the heading output messages There is no user control over the time out period of the gyro The gyro will initialize itself at power up and during initialization or can be calibrated by the user as outlined in Hemisphere GPS GPS Technical Reference manual When the gyro is first initializing it is important that the dynamics that the gyro experiences during this warm up period are similar to the regular operating dynamics For 51 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 Tech
7. described in Hemisphere GPS GPS Technical Reference manual 1 Installation Crescent V100 Environmental Considerations The Crescent V100 is designed to withstand the harsh outdoor environment however there are specific environmental limits that Should be met when storing and using this system The Crescent V100 is designed to be stored between 40 C and 85 C 40 F and 185 F The operating temperature range is 32 Cand 74 C 25 6 F and 165 2 F It is designed for harsh marine use and will operate in an environment with 100 relative humidity Mounting Orientation There are two primary mounting orientations possible with the Crescent V100 system The first and 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 corresponding heading measurements to true heading of the boat by entering a heading bias into the Crescent V100 configuration For example if a gyrocompass heading provides 183 2 while the Crescent V100 provides a heading of 184 0 a bias of 0 8 the bias is added should be programmed into the Crescent V100 to calibrate its heading The Crescent V100 could be phys
8. electronics need either serial port level or a mixture of both The following sections describe the 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 other devices simultaneously therefore the RS 422 ports are only talkers These ports are in accordance with international marine standard IEC 61162 See Annex C of the standard for a description 34 Crescent V100 Series User Guide Serial Port Configuration You may configure Port A or B of the GPS receiver to output any combination of data that you wish Port A can have a different configuration from Port B in terms of data message output data rates and the baud rate of the port This allows you to configure the ports independently based upon your needs For instance if you wish to have one generalized port and one heading only port you may wish to configure Port A to have GGA VTG GSV ZDA and HDT all output at 1 Hz over a 9600 baud rate You may also wish to configure Port B for HDT and ROT message output at their maximum rate of 20 Hz over a 19 200 baud rate The messages that you configure each port to output and the r
9. final location Note You do not necessarily need to orient the antenna precisely as you can enter a software offset to accommodate for any bias in heading measurement due to installation 1 Installation The base has four tunnels that allow you to bring the power data cable out from within the mount in order to route it along 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 gt 10 Crescent V100 Series User Guide Before mounting the antenna on the fixed base e Decide if you need the roll measurement If you do the Crescent V100 will need to be installed perpendicular to the vessel axis If you do not require roll install the Crescent V100 parallel with the vessel s axis See Figure 1 5 Recessed arrow located on bottom of enclosure Perpendicular roll installation a Parallel pitch installation 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 gt 11 1 Installation Routing the cable
10. order to be present for a subsequent power cycle 37 1 Installation Table 1 6 Default port settings Baud NMEA PEUN Port update Wires rate messages rae Port A GPGGA GPVTG Blue RS 232 GPGSV GPZDA BLK with BLU GPHDT GPROT Port B GPGGA GPVTG BRN RS 232 GPGSV GPZDA BLK with BRN GPHDT GPROT Port A GPGGA GPVTG GRN RS 422 GPGSV GPZDA BLK with GRN output only GPHDT GPROT Port B GPGGA GPVTG YLW RS 422 GPGSV GPZDA BLK with YLW output only GPHDT GPROT 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 GPGSA GPGSV and GPRRE are restricted to 1 Hz in all cases 38 Crescent V100 Series User Guide Table 1 7 IEC approved sentences Sentence Description Datum reference GNSS satellite fault detection GPS fix data GNSS fix data Recommended minimum specific GNSS data Course over ground and ground speed Time and date GNSS range residuals GNSS DOP and active satellites GNSS pseudorange error statistics GNSS satellites in view Geographic position latitude longitude Range residual message Command to provide magnetic deviation and variation for calculating magnetic or true heading Command to provide true heading of the vessel Command
11. tracking two 10 channel when tracking SBAS Update Rate Standard 10 Hz optional 20 Hz position and heading Horizontal accuracy lt 0 6 m lt 0 66 yd 95 confidence DGPS lt 2 5 m lt 2 7 yd 95 confidence autonomous no SA Heading accuracy lt 0 30 RMS Pitch roll accuracy lt 1 RMS Rate of turn 90 s max Start up time lt 60 s typical Heading fix lt 20s Satellite reacquisition lt l1s 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 ionospheric activity Note Depends on multipath environment number of satellites in view and satellite geometry 69 Appendix B Specifications Table B 4 Mechanical specifications Item Specification Enclosure UV resistant white plastic AES HW 600G Non corrosive self extinguishing Power data connector 18 pin environmentally sealed Dimensions 60 cm Lx 16 cm W x 18 cm H not including mounts 23 6 in L x 6 3 in W x 7 1 in H Weight 1 50 kg 3 3 Ib Table B 5 Power specifications Item Specification Input voltage 10 to 36 VDC Power consumption lt 5 0 W Current consumption lt 360 mA 12 VDC Isolation Power supply isolated from serial ports Reverse polarity protection Yes Table B 6 Environmental specifications Item Specification St
12. will allow you to orient the combination of the Crescent V100 and pole mount base to the vessel See Figure 1 18 Figure 1 18 Pole base threaded 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 the bulkhead connector to ensure that it seats properly 23 1 Installation Once the cable mount connector is fully seated rotate the 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 Connector Key a Connector Keypad e Figure 1 19 Power data cable key and keyway Figure 1 20 Connected power data cable gt 24 Crescent V100 Series User Guide Fastening the Crescent V100 to the pole mount base To fasten the Crescent V100 to the pole mount base with the supplied self taping screws 1 Fasten the Crescent V100 enclosure to the pole mount base using the supplied self tapping screws 2 Align the two alignment keys on top of the base to the two holes on the Crescent V100 enclosure 3 Use a screwdriver fitted with the s
13. 2 port A BLK with BRN stripe BRN RS 232 port B RX RS 232 port B TX YEL with BLK stripe YEL RS 422 port B RS 422 port B WHT with RED stripe WHT 31 Alarm Alarm 1 Installation Note PPS is supported on pins 17 and 18 on the Crescent V100 V110 but not connected in the standard cables a A S VO ON 0000 1O 1000 NO O O Figure 1 25 Cable 10 X CIRC F 18 PT 30M rear view Table 1 3 on page 33 provides cable O X CIRC F 18 PT 15 m or 30m cable connector pin out 32 Crescent V100 Series User Guide Table 1 3 Cable 10 X CIRC F 18 PT 15 m or 30M pin out Pin Signal Name Wire color number Power input RED Power input BLK Port A TX RS232 BLU Port A RX RS232 BLK with BLU stripe Not connected Port A RS422 GRN Port B TX RS232 BRN Port B RX RS232 BLK with BRN stripe Not connected RF shield drain Bare Port A RS422 BLK with GRN stripe Signal ground GRY Alarm 1 WHT Alarm 2 WHT with RED stripe Port B RS422 YLW with BLK stripe Port B RS422 YLW 1PPS 1PPS 33 1 Installation Serial Port I nterface The Crescent V100 offers position and heading data via both RS 232 and RS 422 level serial ports The answer of which serial port level to use resides with the serial port level s supported by the other electronics involved You may find that the other
14. C This will damage the receiver and void the warranty 28 Crescent V100 Series User Guide To interface the Crescent V100 power cable to the power source e Connect the red wire of the cable s power input to DC positive e Connect the black wire of the cable s power input to DC negative Once the Crescent V100 system has been installed you are ready to turn the system 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 isolates the electronics mechanically from the vessel This addresses the issue of vessel hull electrolysis 29 1 Installation CONNECTING THE CRESCENT V100 TO EXTERNAL DEVICES Interfacing the Crescent V100 The Crescent V100 uses a single cable for application of power and to facilitate the input and output operations The cable is 15 meters 16 4 yards in length and is terminated on the receiver end with an environmentally sealed 18 pin connection The opposite end is un terminated and requires field stripping and tinning Depending on the application and installation needs this cable may need to be shortened If so this is a simple matter Howev
15. CTIVE ITEM IN NO EVENT WILL HEMISPHERE GPS BE LIABLE FOR ANY LOSS OF PRODUCTION LOSS OF PROFITS LOSS OF USE OR FOR ANY SPECIAL INDIRECT INCIDENTAL CONSEQUENTIAL OR CONTINGENT DAMAGES EVEN IF HEMISPHERE GPS 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 be invalid by a court of competent jurisdiction such provision shall be severed from this warranty and the remaining provisions shall remain in full force and effect OBTAINING WARRANTY SERVICE In order to obtain warranty service the end purchaser must bring the Product to a Hemisphere GPS approved service center along with the end purchaser s proof of purchase For any questions regarding warranty service or to obtain information regarding the location of any of Hemisphere GPS approved service centers contact Hemisphere GPS at the following address Hemisphere GPS Inc 7560 East Redfield Road Suite B Scottsdale Arizona 85260 Phone 480 348 9919 Fax 480 348 6370 techsupport hemisphergps com http www hemispheregps com Crescent V100 Series User Guide Table of Contents OvervieW 0 eee ee ee ee 1 1 INSTALLATION
16. Crescent V100 Series User Guide Part No 875 0174 000 Rev A1 This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions e This device may not cause harmful interference e This device must accept any interference received including interference that may cause undesired operation Copyright Notice Hemisphere GPS Inc Precision GPS Applications Copyright Hemisphere GPS 2007 All rights reserved No part of this manual may be reproduced transmitted transcribed stored in a retrieval system or translated into any 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 owners Notice to Customers Contact your local dealer for technical assistance To find the authorized dealer near you call or write us at Hemisphere GPS 4110 9 Street S E Telephone number 403 259 3311 Calgary AB Canada Fax number 403 259 8866 T2G 3C4 E mail address sales hemispheregps com Warranty Notice COVERED PRODUCTS This warranty covers all products manufactured by Hemisphere GPS Inc the Products HEMISPHERE GPS INC LIMITED WA
17. EA messages status and update rate Command GPHDM 4STRING Description Magnetic heading based on RTK derived GPS and magnetic declination Output GPGGA GPVTG GPGSA AND GPZDA 1 Hz MAX Note The GP of the message is the talker 1D Note The GPRRE and GPHDM commands do not comply with the current IEC 61162 standard Table 2 5 Heading parameters Command Description J ATT TILTAID Enable disable accelerometer pre calibrated J ATT TILTCAL Calibrate accelerometer J ATT GYROAID Enable disable gyro J ATT LEVEL Enable disable level operation J ATT HTAU Set query heading time constant 0 0 to 3600 0 seconds J ATT PTAU Set query pitch time constant 0 0 to 3600 0 seconds J ATT HRTAU Set query time constant 0 0 to 3600 0 seconds J ATT COGTAU Set query COG time constant 0 0 to 3600 0 seconds J ATT SPDTAU Set query speed time constant 0 0 to 3600 0 seconds 57 2 Crescent V100 Operation Table 2 5 Heading parameters Command J ATT HBIAS J ATT PBIAS J ATT NEGTILT Description Set query heading bias 180 0 to 180 0 degrees Set query pitch roll bias 15 0 to 15 0 degrees Enable disable negative tilt J ATT ROLL Configure for roll or pitch output J ATT NMEAHE Changed the HDT and ROT HDM and HDG message headers between GP and HE and HC Table 2 6 General commands Comman
18. NTING LOCATION When considering mounting locations you will need to give regard for both GPS and hence SBAS and beacon reception The following two sections provide information that will help determine the best location for the Crescent V100 GPS Reception When considering various locations to mount the Crescent V100 consider the following recommendations closely e The Crescent V100 computes a position based upon the internal primary GPS antenna element Mount the Crescent V100 in the location for which you desire a position with respect to the primary GPS antenna which is located on the end opposite the recessed arrow on the underside of the enclosure e 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 e tis important to locate any transmitting antennas away from the Crescent V100 by at least a few feet This will ensure that tracking performance is not compromised giving you the best performance possible e Make sure that there is enough cable length to route into the vessel in order to reach a breakout box or terminal strip Do not locate the antenna where environmental conditions exceed those specified in Table B 6 in the appendix Crescent V100 Series User Guide Beacon Reception When using the V110 s internal
19. RRANTY Hemisphere GPS Inc hereby warrants solely to the end purchaser of the Products subject to the exclusions and procedures set forth herein below that the Products sold to such end purchaser shall be free under normal use and maintenance from defects in material and workmanship for a period of 12 months from delivery to such end purchaser Repairs and replacement components are warranted subject to the exclusions and procedures set forth below to be free under normal use and maintenance from defects in material and workmanship for 90 days from performance or delivery or for the balance of the original warranty period whichever is greater PURCHASER S EXCLUSIVE REMEDY The end purchaser s exclusive remedy under this warranty shall be limited to the repair or replacement at the option of Hemisphere GPS of any defective Products or components thereof The end user shall notify Hemisphere GPS or a Hemisphere 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 products by any party other than a Hemisphere GPS approved service center shall render this warranty null and void Hemisphere GPS does
20. 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 12 Crescent V100 Series User Guide Figure 1 7 Running cable through fixed base Align the connector keyway of the cable to the key of the connector mounted on the Crescent V100 enclosure See Figure 1 8 Insert the cable mount connector into the bulkhead connector aligning the locking ring at the same time See Figure 1 8 Connector 0 Key Connector Keypad e Figure 1 8 Power Data cable and keyway gt 13 1 Installation 4 Once inserted rotate the ring clockwise until it locks The locking action is firm but you will feel a positive click when it has locked See Figure 1 9 Figure 1 9 Connecting the power data connector to Crescent V100 5 Once you have secured the connector slide the fixed base up to the bottom of the Crescent V100 enclosure There are two alignment keys on top of 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 t
21. ading based products Users will achieve excellent accuracy and stability due to Crescent s more accurate code phase measurements improved multipath mitigation and fewer components The GPS antennas inside the Crescent V100 are separated by 0 5 meters 0 55 yards between antenna phase centers resulting in a 0 30 RMS heading performance The Crescent V100 provides heading and positioning updates of up to 20 Hz and delivers positioning accuracy of 60 centimeters 23 62 inches 95 of the time and 0 30 RMS with 50 centimeter 19 69 inches antenna separation when using Differential GPS corrections 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 affected by differential signal outages due to signal blockages weak signals or interference If you are new to GPS and SBAS we recommend that you consult Hemisphere GPS GPS Technical Reference manual for further information on these services and technologies before proceeding 1 INSTALLATION Mounting Locations Mounting Options Powering the Crescent V100 Connecting the Crescent V100 to External Devices 1 Installation MOU
22. are only output at 1 Hz Table 2 1 Applications Primary application 1 Table 2 2 Differential commands Command Description J DIFF Differential mode LIMIT DGPS LIMIT distance J AGE Max DGPS COAST M age 6 to 8100 seconds WAASPRN Configure for specific SBAS PRN numbers GEO Query WAAS for current location and WAAS satellites ASC D1 Request SBAS diagnostic information GPMSK Tune beacon to specific frequency 55 2 Crescent V100 Operation Table 2 3 Serial port setting commands Command Description J BAUD RS 232C RS 422 output communication rate Table 2 4 NMEA messages status and update rate Command Description GPGGA GPS fix data GPGLL Geographic position lat long GPGSA GNSS DOP and active satellites GPGST GNSS 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 derived GPS heading GPROT RTK derived GPS Rate Of Turn PSAT HPR Heading pitch roll and time in single message 56 Crescent V100 Series User Guide Table 2 4 NM
23. ate 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 signals may be used simultaneously Interfacing to a PC PC computers typically use a DB9 male connector for RS 232 serial port communications To terminate either port for connection to a PC serial port connect the wires to a DB9 female connector according to Table 1 4 and Table 1 5 see page 35 and page 36 Table 1 4 Port A DB9 RS 232 interface configuration Pin Wire Color Blue Port A transmit RS 232 Black blue striped Port A receive RS 232 Grey Signal ground 35 1 Installation Table 1 5 Port B DB9 RS 232 interface configuration Wire Color 2 Brown Port B transmit RS 232 3 Black brown striped Port B receive RS 232 5 Grey Signal ground Figure 1 26 displays the numbering scheme for a DB9 socket connector female The associated numbering for the plug connector male on a PC computer is a mirror reflection of scheme showed in this figure Figure 1 26 DB9 female socket numbering n Note For successful communications the baud rate of the Crescent V100 serial ports must be set to match that of the devices to which they are connected When interfacing to other devic
24. ble erroneous solutions Hemisphere GPS GPS Technical Reference manual describes the commands and methodology required to recalibrate query or change the 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 will be reduced to a horizontal ring on the surface of the sphere By reducing the search volume this considerably decreases startup and reacquisition times See figure 2 2 Figure 2 2 Crescent V100 s tilt aiding 50 Crescent V100 Series User Guide Gyro Aiding The Crescent V100 s internal gyro offers several benefits It will Shorten reacquisition times when a GPS heading is lost due to obstruction of satellite signals by reducing the search volume required for solution of the RTK The gyro provides a relative change in angle since the last computed heading and when used in conjunction with the tilt sensor defines the search space as a wedge shaped location See Figure 2 3 Figure 2 3 Crescent V100 s gyro aiding The gyro aiding accurately smooths the heading output and the rate of turn It will also provide an accurate substitute heading for a short period
25. 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 Warning Do not bottom out the Crescent V100 pole base on the threaded mount Such manner can damage the system Use of the jam nut and washer are mandatory for pole mounting Any damage resulting from not using these pieces to mount the Crescent V100 will not be covered under warranty 16 Crescent V100 Series User Guide Before mounting the antenna or the pole mount bracket Decide if you need the roll measurement If you need roll measurement the Crescent V100 will need to be installed perpendicular to the vessel axis If it you do not need roll measurement install the Crescent V100 parallel with the vessel s axis 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 Li Once you have installed the pole or rail mount thread the hexagonal jam nut onto the mount followed by the stainless steel washer both are supplied with the Crescent V100 system 17 1 Installation 2 Thread the nut onto the nut approximately 8 to 10 full tu
26. cent V100 Series User Guide time constant will increase the level of heading smoothing and increase lag The pitch time constant allows you to adjust the level of responsiveness of the pitch measurement provided in the PSAT HPR message The default value of this constant is 0 5 seconds of smoothing Increasing the time constant will increase the level of pitch smoothing and increase lag The heading rate time constant allows you to adjust the level of responsiveness of the rate of heading change measurement provided in the HEROT message The default value of this constant is 2 0 seconds of smoothing 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 and its accuracy is dependant upon the speed of the vessel noise is proportional to 1 speed and when Stationary this value is invalid The speed time constant allows you to adjust the level of responsiveness of the speed measurement provided in the GPVTG message The default value of this parameter is 0 0 seconds of smoothing Increasing the time constant will increase the level of Speed measurement smoothing 53 2 Crescent V100 Op
27. chipset technology Note The Crescent V100 V110 GPS Compass will be referred to as the Crescent V100 The Crescent V100 is a complete GPS compass and positioning system in a single enclosure that requires only one power data cable connection The Crescent V100 is designed primarily for the marine market however it is also suitable for other markets such as machine control and agriculture guidance This user guide addresses the primary use of the Crescent V100 in the marine industry however the information provided is broad enough to satisfy the needs of the Crescent V100 use in other markets The Crescent V100 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 Note The Crescent V100 model is identical to the V110 with the exception that it does not contain a DGPS beacon module If you purchased the Crescent V100 please ignore the sections of this manual that discuss the beacon signal receiver operation and implications to installation relating to the beacon signal Crescent technology supports multiple RF front ends enabling tighter coupling of measurements from separate antennas for use in he
28. d Description ATT CSEP Query antenna separation J AATT MSEP Manually set query antenna separation J ASC Dx Turn on off diagnostics message x J QUERY GUI DE Query accuracy acceptableness J RESET Reset unit s configuration to firmware defaults J SAVE Save session s configuration changes J SHOW Shows current configuration J OFF Turn off all data messages T Query receiver type Query unit s serial number and firmware versions J ATT SEARCH Force a new RTK heading search J ATT SUMMARY Show current TAU configuration 58 Crescent V100 Series User Guide Table 2 7 Binary messages Message BIN1 Description GPS position BIN2 GPS DOP s BIN8O SBAS J BIN93 WAAS ephemeris data J BIN94 lonosphere and UTC conversion parameters J BIN95 Ephemeris J BIN96 Code and carrier phase J BIN97 Process statistics J BIN98 Satellite and almanac BIN99 GPS diagnostics 59 APPENDIX A TROUBLESHOOTING Appendix A Troubleshooting A Troubleshooting Table A 1 provides troubleshooting for common problems Table A 1 Troubleshooting Possible Solution Receiver fails to power Verify polarity of power leads Check integrity of power cable connectors Check power input voltage 10 to 36 VDC Check current restrictions imposed by pow
29. ectly lined up alignment sight If you have another accurate source of heading data on your vessel 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 Crescent V100 Series User Guide MOUNTING OPTIONS The Crescent V100 allows for two different mounting options e Fixed base mounting e Pole and rail mounting Fixed Base Mounting The fixed base supplied with the Crescent V100 is intended to allow you to mount the system to a flat surface This surface may be something that you fabricate for the sake of the installation or may be something that already exists on your vessel or an off the shelf item such as a radar mounting plate Figure 1 1 on page 5 shows the following features for the fixed base e Six holes for mounting onto the Crescent V100 enclosure e Four slots used for fastening the mounted enclosure to the vessel e Four tunnels that allow you to route the cable outside the base and along the mounting surface e Two small keys that aid the alignment of the base to the enclosure e Channel through the mount for the power data cable The slots on the bottom of the base allow for a degree of adjustment when the Crescent V100 is secured in its
30. ecuring the power data cable The Crescent V100 comes with a 15 meter 16 40 yards power data cable optional 30 meter 32 80 yards power data cable available When choosing a route for the antenna extension cable e Avoid running the cable in areas of excessive heat e Keep the cable away from corrosive chemicals e Do not run the cable through door or window jams e Keep the cable away from rotating machinery e Do not bend excessively or crimp the cable e Secure along the cable route using plastic tie wraps as necessary Warning Improperly installed cables near machinery can be dangerous 27 1 Installation POWERING THE CRESCENT V100 Power Considerations The Crescent V100 is powered with an input voltage between 10 and 36 VDC For best performance the supplied power should be continuous and clean Table 1 1 provides the power specifications of the Crescent V100 Table 1 1 Power requirements Input Voltage Input current Input power 10 to 36 VDC lt 370 mA 12 VDC lt 5 W maximum The Crescent V100 power supply features reverse polarity 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 Warning Do not apply a voltage higher than 36 VD
31. er if you require a longer cable run than 15 meters 16 4 yards you may purchase a 30 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 resistant to noise and attenuation When lengthening the power input leads to the Crescent V100 please ensure that the additional voltage drop is small enough that your power system can continue to power the system above the minimum voltage of the system Wire of 18 gauge or larger should also be used Power Data Cable Pin Out Figure 1 24 and figure 1 25 on page 31 and 32 show the Cable O X CIRC F 18 PT 15 M or 30 M Wiring cable 30 i El II Crescent V100 Series User Guide 15 m 30 Aro Strip and tin 3 mm Figure 1 24 Cable 10 X CIRC F 18 PT 30M Table 1 2 provides the Cable 10 X CIRC F 18 PT 15 M or 30 M Wiring Table 1 2 Cable 10 X CIRC F 18 PT 15M or 30M wiring Pair Color code AWG Bare J1 Function RF SHIELDED DRAIN BLK RED Power GRND Power input BLK with BLU stripe BLU RS 232 port A RX RS 232 port A TX GRY Sig GRND BLK with GRN stripe GRN RS 422 port A RS 42
32. er source minimum available should be gt 1 0 A Check receiver power status to ensure that the receiver is powered an ammeter can be used for this No data from Crescent V100 Verify that desired messages are activated this can be done through PocketMAX or with J SHOW in any terminal program Ensure that the baud rate of the Crescent V100 matches that of the receiving device Check integrity and connectivity of power and data cable connections 62 Crescent V100 Series User Guide Table A 1 Troubleshooting Symptom Possible Solution Random data from Verify that the RTCM or binary Crescent V100 messages are not being output accidentally send a SHOW command Verify baud rate settings of Crescent V100 and remote device match correctly Potentially the volume of data requested to be output by the Crescent V100 could be higher than the current baud rate supports Try using 19 200 as the 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 Check CSEP value is fairly constant incorrect heading without varying more than 1 cm value 0 39 in Larger variations may indicate a high multipath environment and require moving the receiver location If heading is calculated then lost at consistent time intervals recalibrate the tilt
33. er to improve positioning quality to sub meter levels the Crescent V100 is able to use differential corrections received through the internal SBAS demodulator In addition to these differential services the V110 can also receive radiobeacon corrections For more information on the differential services and the associated commands please refer to Hemisphere GPS GPS Technical Reference manual 45 2 Crescent V100 Operation Automatic SBAS WAAS EGNOS MSAS and others Tracking The Crescent V100 will automatically scan and track SBAS signals without the need to tune the receiver The Crescent V100 features two channel tracking that provides an enhanced ability to maintain a lock on a SBAS satellite when more than one satellite is in view This redundant tracking approach results in more consistent tracking of a SBAS signal when in an area where signal blockage of a satellite is possible Beacon Operation Many marine authorities such as coast guards have installed networks of radiobeacons that broadcast DGPS corrections to users of this system With the increasing utility of these networks for terrestrial applications there is an increasing trend towards densification of these networks inland The dual channel beacon receiver in the V110 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
34. eration ALARM FUNCTIONALITY A relay is located on the Type Heading Device THD circuit board The relay contacts are isolated from all circuitry in the THD The THD is connected to the coil side of the relay but not to the contacts that are connected to the external pins through the main IO connector If the THD loses power or heading the coil voltage is lost and the relay opens and activates the notification method 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 the connection is complete on the user defined external notification device Watchdog The watchdog is a timer that is controlled by the software which monitors if the heading is lost The watchdog software is in compliance with IEC 60495 54 Crescent V100 Series User Guide COMMON COMMANDS AND MESSAGES Tables 2 1 to 2 7 on pages 55 to 59 provide the common commands and brief description of what they do Refer to Hemisphere GPS GPS Technical Reference for more details Note The messages have a default update rate of up to 10 Hz and optional 20 Hz with a subscription The GPGSA GPGST GPGSV and GPRRE messages
35. es 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 36 Crescent V100 Series User Guide Since RS 422 is a balanced signal with positive and negative Signals referenced to ground ensure that you maintain the correct polarity For instance when connecting the transmit data output positive signal to the receive line of the other device it should be connected to the receive positive terminal The negative transmit data signal from the Crescent V100 is then connected to the receive data negative input of the other device There is likely not much reason to connect the receive data input of the Crescent V100 to another 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 V100 Table 1 6 to Table 1 11 on pages 38 to 41 provide details on the firmware types port settings default NMEA messages elevation mask differential age mask default differential mode and beacon receiver settings Note Any changes you make to the Crescent V100 configuration need to be saved with the J SAVE command in
36. hread Note The base is not intended to be removed and re fastened frequently Frequent removal of the base from the enclosure may result in failure of the screw hole threads Stripped threads are not covered under the product warranty 14 Crescent V100 Series User Guide Figure 1 10 and Figure 1 11 show the location of the screw holes Figure 1 11 Fastening the fixed base to the Crescent V100 15 1 Installation 7 Once you have fastened the fixed base to the Crescent V100 enclosure using six mounting screws you are ready to fasten the assembly to your mounting surface It is recommended to use machine screws that have an hexagonal Allen Key head and an L shaped Allen Key as there may not be sufficient clearance between the bottom of the antenna and your mounting surface to use a normal screwdriver Note We do not supply the mounting surface hardware You will need to supply the appropriate fastening hardware required to complete the installation of the Crescent V100 and mount assembly Pole and Rail Mount Note This pole and rail mount does not meet the IEC 60945 section 8 7 for vibration You may choose to pole mount or rail mount the Crescent V100 as opposed to the fixed base mounting approach The pole mount incorporates a 1 14 UNS thread To aid in the installation of the Crescent V100 we have supplied a hex jam nut and washer These are used to secure the antenna in a particular direction without
37. ically adjusted to correct for this deviation Crescent V100 Series User Guide The second method of mounting the Crescent V100 system is to mount the Crescent V100 perpendicular to the boat s symmetrical axis This orientation will provide the heading and roll of the vessel The Crescent V100 is then configured with a heading bias of 90 or 90 depending if the Crescent V100 points to port or starboard to correct the heading A feature is present in the Crescent V100 to change the sign of the roll pitch measurement to be positive or negative depending on the required conversion for positive negative roll if 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 center the small post on the opposite side of the enclosure from you within the channel made in the medallion located in the center of the enclosure top as shown in the two following figures Alignment accuracy when looking through the long site is approximately 1 Using the short site alignment is approximately accurate to 2 5 Figure 1 1 Lining up the alignment sight 1 Installation Figure 1 2 Corr
38. n Automatic Automatic 42 2 CRESCENT V100 OPERATION GPS Overview Understanding the Crescent V100 2 Crescent V100 Operation GPS OVERVIEW For your convenience both the GPS and SBAS operation of the Crescent V100 features automatic operational algorithms When powered for the first time the Crescent V100 system will perform a cold start which involves acquiring the available GPS satellites in view and the SBAS differential service If SBAS is not available in your area an external source of RTCM SC 104 differential corrections may be used If you choose to use an external source of correction data you will need to ensure that the external source supports an eight data bit no parity and one stop bit configuration 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 Note Differential source and status have no impact on heading They only have an impact on positioning 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 This is a hands free mode of operation Receiver Performance The Crescent V100 works by finding four or more GPS satellites in the visible sky and uses the information those satellites provide to
39. nical 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 52 Cres
40. not warrant claims asserted after the end of the warranty period Hemisphere GPS does not warrant or guarantee the precision or accuracy of positions obtained when using Products Products are not intended for primary navigation or for use in safety of life applications The potential accuracy of Products as stated in Hemisphere GPS literature and or Product specifications serves to provide only an estimate of achievable accuracy based on e Specifications provided by the US Department of Defense for GPS Positioning e DGPS service provider performance specifications Hemisphere GPS reserves the right to modify Products without any obligation to notify supply or install any improvements or alterations to existing Products NO OTHER WARRANTIES THE FOREGOING WARRANTY IS EXCLUSIVE OF ALL OTHER WARRANTIES WHETHER WRITTEN ORAL IMPLIED OR ARISING BY STATUTE COURSE OF DEALING OR TRADE USAGE IN CONNECTION WITH THE DESIGN SALE INSTALLATION SERVICE OR USE OF ANY PRODUCTS OR ANY COMPONENTS THEREOF INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE LIMITATION OF LIABILITY THE EXTENT OF HEMISPHERE GPS LIABILITY FOR DAMAGES OF ANY NATURE TO THE END PURCHASER OR ANY OTHER PERSON OR ENTITY WHETHER IN CONTRACT OR TORT AND WHETHER TO PERSONS OR PROPERTY SHALL IN NO CASE EXCEED IN THE AGGREGATE THE COST OF CORRECTING THE DEFECT IN THE PRODUCT OR AT HEMISPHERE GPS OPTION THE COST OF REPLACING THE DEFE
41. ntennas for GPS signal processing One antenna is designated as the Primary GPS while the other is designated as the Secondary GPS Positions computed by the Crescent V100 are referenced to the phase center of the Primary GPS antenna Heading data references the vector formed from the Primary GPS antenna phase center to the Secondary GPS antenna phase center There is a heading arrow located on the bottom of the Crescent V100 enclosure which defines system orientation The arrow points in the direction that the heading measurement 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 precision The technique of computing the location of the Secondary GPS antenna with respect to the Primary antenna when the Primary antenna is moving is often referred to as moving base station Real Time Kinematic or moving base station RTK RTK technology generally is very sophisticated and requires a significant number of possible solutions to be analyzed where various combinations of integer numbers of L1 wavelengths to each satellite intersect within a certain search volume The integer number of wavelengths is often refe
42. orage temperature 40 C to 85 C 40 F to 185 F Dry and damp heat Operating temperature 32 C to 74 C 25 6 F to 165 2 F Dry and damp heat Humidity 100 non condensing 70 Crescent V100 Series User Guide 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 71 gt APPENDIX C PARTS LIST Appendix C Parts List C Parts List Table C 1 to C 3 on pages 74 and 75 provides the Crescent V100 parts list Note The Crescent V100 parts comply with IEC 60945 s section 4 4 exposed to the weather Table C 1 Equipment Part number 627 1106 603 1002 Description Quantity Base mount Hemisphere GPS logo One Base mount without branding 627 1109 603 1001 Pole mount Hemisphere GPS logo One Pole mount without branding 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 051 0157 Description Quantity 15 m V MV cable cable is optional 051 0158 30 m V MV cable cable is optional 74 Crescent V100 Series User Guide Table C 3 Documentation Part number Description Quantity Warranty page
43. rns to provide adequate mounting thread for the pole mount base See Figure 1 12 Figure 1 12 Threading on the lock nut and washer Routing the cable 1 When mounting the Crescent V100 using the pole 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 centimeters This will allow you to connect the cable to the Crescent V100 easily gt 18 Crescent V100 Series User Guide Figure 1 14 Running cable through the pole base 19 1 Installation Figure 1 15 Running cable through the pole base 20 Crescent V100 Series User Guide 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 21 1 Installation 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 22 Crescent V100 Series User Guide 2 Ensure that there is a gap between the lock nut washer and pole mount base This
44. rred to as the Ambiguity as they are initially ambiguous at the start of the RTK solution 48 Crescent V100 Series User Guide The Crescent V100 places a constraint on the RTK solution with the prior knowledge of the fact that the Secondary GPS antenna has a fixed separation of 0 50 meters 1 64 feet from the Primary GPS antenna inside the enclosure This defines the search volume of the Secondary antenna as the surface of a sphere with radius 0 50 meters 1 64 feet centered on the location of the Primary antenna See Figure 2 1 Primary antenna Figure 2 1 Secondary antenna s search volume Note The Crescent V100 moving base station algorithm only uses GPS to calculate heading Differential corrections are not used in this calculation and will not affect heading accuracy 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 the internal printed circuit board 49 2 Crescent V100 Operation Both sensors act to reduce the RTK search volume which improves heading startup and reacquisition times and also has the benefit of improving the reliability and accuracy of selecting the correct heading solution by eliminating other possi
45. scent 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 65 gt APPENDIX B SPECIFICATIONS Appendix B Specifications B Specifications Table B 1 to B 6 on pages 68 to 70 provides the Crescent V100 s communication beacon sensor GPS sensor mechanical power and environmental specifications Table B 1 Communication specifications Item Specification Serial ports 2 full duplex RS 232 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 modes Automatic signal strength or range and manual Compliance IEC 61108 4 beacon standard 68 mm3 ee Crescent V100 Series User Guide Table B 3 GPS sensor specifications Item Specification Receiver type L1 C A code with carrier phase smoothing Channels Two 12 channel parallel
46. sensor with J ATT TILTCAL command 63 Appendix A Troubleshooting Table A 1 Troubleshooting Symptom Possible Solution No beacon lock Beacon reception capability is only present on V110 model Verify that the receiver is tuned to the correct frequency and bit rate Ensure that beacon signal coverage is expected in your area Make sure that environmental noise is not masking the signal reducing the SNR reading No DGPS position in Verify that the baud rate of the external RTCM mode RTCM input port matches the baud rate 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 J DIFF PORTB command on Port A will cause the receiver to expect the corrections to be input through Port B No SBAS lock Verify Crescent V100 s clear view of the sky Verify the lock status of SBAS Satellites this can be done with PocketMAX monitor BER value Set SBAS mode to automatic with the command J WAASPRN AUTO 64 Crescent V100 Series User Guide Table A 1 Troubleshooting Symptom Possible Solution No heading or Heading is from Primary to incorrect heading Secondary antenna so the arrow on value the underside of the Crescent V100 should be directed to the bow side ATT SEARCH command forces the Cre
47. that contains the vessel s rate of turn information 39 1 Installation Note 10 Hz is the standard maximum 20 Hz is the maximum available to purchase Note GRS GSA GST and GSV support external integrity checking They are to be synchronized with corresponding fix data GGA or GNS Note The data bits parity and stop bit are not adjustable 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 4STRING 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 NTLT Proprietary NMEA sentence that provides the title measurement from the internal inclinometer in degrees 40 Crescent V100 Series User Guide Table 1 9 Available baud rates Baud Rates 4800 9600 19200 38400 Table 1 10 Correction age and elevation mask defaults Elevation mask Max DGPS age 2700 seconds 5 Table 1 11 Default differential mode Crescent V100 Crescent V110 differential mode differential mode SBAS Beacon WAAS EGNOS 41 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 MSK rate Selection selectio
48. upplied 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 Note The base is not intended to be removed and re fastened frequently Frequent removal of the base from the enclosure may result in failure of the screw hole threads Stripped threads are not covered under the product warranty Figure 1 21 Fastening the pole base to the Crescent V100 gt 25 1 Installation 4 Rotate the hex nut and washer up to the bottom of the surface of the pole mount base Do not tighten them at this point as you will need to align 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 gt 26 Crescent V100 Series User Guide 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 mounted on the pole If it is loose tighten the lock nut further until you can not move it Routing and s
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