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This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, a nd (2) this device must accept any interference received, including interference that may cause undesired operation. This product complies with the essential requirements and other relevant provisions of Directive 2014/53/EU. The declaration of conformity may be consulted at https://hemispheregnss.com/About‐Us/Quality‐Commitment. Copyright Notice Copyright Hemisphere GNSS, Inc. (2017). All rights reserved. No part of this manual may be reproP206duced, 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 GNSS. Trademarks ® ® ® Hemisphere GNSS , the Hemisphere GNSS logo, COAST , Crescent , Eclipse , e‐Dif , L‐Dif , miniEclipse , ® PocketMAX PC , PocketMAX , PocketMax3 , S320 , SBX‐4 , SureTrack , Vector , XF1 , and XF2...
Chapter 1: Introduction Chapter 1: Introduction Crescent OEM Board Options What’s Included Crescent Integration Common Features of Crescent Boards Message Interface Using PocketMax to Communicate with the Crescent Crescent Integrator Guide 1 PN 875‐0344‐0 Rev A2 ...
Chapter 1: Introduction This manual does not cover receiver operation, the PocketMax™ utility, or commands and messages ® (NMEA 0183, NMEA2000 or HGPS proprietary). For information on these subjects refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GNSS Reference Guide). Crescent OEM Board Options The Crescent™ OEM board is available in two form factors as shown in Table 1‐1. Table 1‐1: Crescent board options Model GNSS Systems Compatibility L‐Band Support ™ P206 L1/L2 GPS, GLONASS Hemisphere GNSS’ standard Yes ‐ with optional and BEIDOU pinout configuration (34‐pin) Hemisphere GNSS LX‐2 OEM board P207 ™ L1/L2 GPS, GLONASS Compatible with popular No and BEIDOU aftermarket products (20‐pin) Note: This manual covers Crescent P206 and P207 OEM boards. When referring to both boards this manual uses the term Crescent. When referring to either Crescent model this manual uses the model name (P206 or ...
Chapter 1: Introduction What’s Included The Crescent is available in two configurations: • Crescent OEM board only ‐ designed for integrators who are familiar w ith Crescent board integration • Crescent OEM board and Universal Development Kit ‐ designed for integrators who are new to Crescent board i ntegration The Universal Development Kit is designed to work with various Hemisphere GNSS OEM boards and includes an enclosure with carrier board, adapter boards, and various cables. For more information on the Universal Development Kit visit www.hemispheregnss.com and navigate to the OEM Products page or contact your local dealer. Crescent Integration Successful integration of the Crescent within a system requires electronics expertise that includes: • Power supply design • Serial port level t ranslation • Reasonable radio frequency c ompetency • An understanding of electromagnetic c ompatibility • Circuit design and layout ...
Chapter 1: Introduction • L‐Dif™‐ready – Local differential is a proprietary Hemisphere GNSS method where a specialized set of messages are relayed between two Crescent receivers • Quick times to first fix • Four full‐duplex serial p orts • USB ports – USB device port only (P207) – USB host and USB device ports (P206) • 1 PPS timing output • Event marker input Note: For complete specifications of Crescent boards see Appendix C, “Technical Specifications.” Message Interface The Crescent uses a NMEA 0183 interface, allowing you to easily make configuration changes by sending text‐type commands to the receiver. The Crescent also supports a selection of binary messages. There is a wider array of information available through the binary messages, plus binary messages are inherently more efficient with data. If the application has a requirement for raw measurement data, this information is available only in a binary format. For more information on NMEA 0183 commands and messages as well as binary messages refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GPS Reference Guide). Using PocketMax to Communicate with the Crescent Hemisphere’s PocketMax is a free utility program that runs on your Windows PC or Windows ...
Chapter 2: Board Overview Crescent OEM Board Key Features With its small form factor, low power consumption, and simple on‐board firmware Crescent is an ideal solution for integrators, offering scalability and expandability from L1 GPS with SBAS to L1 GPS, GLONASS and BeiDou (with RTK capability). Crescent is offered in two common industry form factors: ® • P206 is a drop‐in replacements for Hemisphere GNSS’ Crescent and mini Eclipse receivers (34‐pin) and provide L‐band support with the optional Hemisphere GNSS LX‐ 2™ OEM board • P207 has a mechanical design compatible with popular after market products (20‐pin) The reliable positioning performance of Crescent is further enhanced through Crescent RTK and COAST DGPS technology. With Crescent, RTK performance is scalable. Utilize the same centimeter‐level accuracy in either L1 GPS‐only mode, or employ the performance of all available L1 GPS, GLONASS and BeiDou GNSS signals. Hemisphere GNSS’ SureTrack technology provides peace of mind knowing the RTK rover is making use of every satellite it is tracking. Benefit from fewer RTK dropouts in congested environments, faster reacquisition, and more robust solutions due to better cycle slip detection. Patented COAST software enables select Hemisphere GNSS receivers to utilize aging DGPS correction data during times of interference, signal blockage, and weak signal. The receiver will coast and continue to maintain sub‐meter positioning for 40 minutes or more without a DGPS signal. ...
Chapter 2: Board Overview Mechanical Layout Figure 2‐1 shows the mechanical layout for the Crescent P206 OEM board. Figure 2‐2 shows the mechanical layout for the Crescent P207 OEM board. Dimensions are in millimeters (inches) for all three l ayouts. 40.6 mm (1.60 in) 34.3 mm (1.35 in) 3.2 mm 3.2 mm (.13 in) (.13 in) 64.8 mm (2.55 in) 71.1 mm...
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Chapter 2: Board Overview 40.6 mm (1.60 in) 34.3 mm (1.35 in) 3.2 mm 4.6 mm 3.2 mm (.13 in) (.18 in) (.13 in) 64.8 mm (2.55 in) 72.6 mm (2.85 in) 7.4 mm (.29 in) 4.2 mm (.17 in) 5.9 mm 1.5 mm...
Chapter 2: Board Overview Mounting Options There are two options for mounting the Crescent: • Direct Electrical Connection method • Indirect Electrical Connection (Cable) m ethod Direct Electrical Connection Method Place an RF connector, heading connector, and mounting holes on the carrier board and then mount the Crescent on the standoffs and RF and header connectors. This method is very cost effective as it does not use cable assemblies to interface the Crescent. Note: Be aware of the GPS RF signals present on the carrier board and ensure the correct standoff height to avoid any flexual stresses on the board when you fasten it down. The Crescent uses a standoff height of 7.9 mm (0.3125 in). With this height there should be no washers between either the standoff and the Crescent or the standoff and the carrier board; otherwise, you must make accommodations. You may need to change the standoff height if you select a different header connector. If you want to use a right angle MCX connector, use a taller header than the Samtec part number suggested in this guide. This will provide clearance to have a right angle cable‐mount connector and reduce the complexity by not having the carrier board handle the RF signals. See Table 2‐1 on page 9 for Crescent connector information. The mounting holes of the Crescent have a standard inner diameter of 3.2 mm (0.125 in). Indirect Electrical Connection (Cable) Method The second method is to mount the Crescent mechanically so you can connect a ribbon power/data cable to the Crescent. This requires cable assemblies and there is a reliability factor present with cable assemblies in addition to increased expense. Crescent Integrator Guide 10 PN 875‐0344‐0 Rev A2 ...
Chapter 2: Board Overview Header Layouts and Pinouts The Crescent uses a dual‐row header connector to interface with power, communications, and other signals. To identify the first header pin orient the board so the diamond is to the upper left of the pins; the first pin is on the left directly below the diamond (see Figure 2‐3). The pins are then sequentially numbered per row from top to bottom. Figure 2‐3: Identifying the first pin on the header connector Crescent Integrator Guide 11 PN 875‐0344‐0 Rev A2 ...
Chapter 2: Board Overview Crescent 34‐Pin Header Layout/Pinout The P206 boards have a 34‐pin header. Figure 2‐4 shows the header layout and Table 2‐2 provides the header pinout. Figure 2‐4: Crescent 34‐pin header layout Table 2‐2: Crescent 34‐pin header pinout Pin Name Type Description 1 3.3 V Power Receiver power supply, 3.3 V 2 3.3 V Power Receiver power supply, 3.3 V 3 Antenna Pwr Power Antenna power, DC, 15 V max 4 Batt Backup Power Power, 1.5 to 5.5 V, 500 nA typical 5 USB DEV+ I/O USB device data + 6 USB DEV– I/O ...
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Chapter 2: Board Overview Table 2‐2: Crescent 34‐pin header pinout (continued) Pin Name Type Description 24 GPIO3 I/O General purpose input/output 25 Speed Output Output 0 ‐ 3 V variable clock output 26 Speed Ready Output Active low, speed valid indicator, 3.3 V CMOS 27 GND Power Receiver ground 28 GND Power Receiver ground 29 n/c n/c n/c 30 n/c n/c n/c 31 PCTX ...
Chapter 2: Board Overview Crescent 20‐Pin Header Layout/Pinout The P207 boards have a 20‐pin header. Figure 2‐5 shows the header layout and Table 2‐3 provides the header pinout. Figure 2‐5: Crescent 20‐pin header layout Table 2‐3: Crescent 20‐pin header pinout Pin Name Type Description 1 Antenna Pwr Power Antenna power, DC, 15 V max 2 3.3 V Power Receiver power supply, 3.3 V 3 USB DEV– I/O USB device data ‐ 4 USB DEV+ I/O USB device data + 5 Reset Open collector Reset, open collector, 3.3 V typical, not required 6 PCRX Input ...
Chapter 2: Board Overview Signals This section provides information on the signals available via connectors. RF Input The Crescent is designed to work with active GNSS antennas with an LNA gain range of 10 to 40 dB. The purpose of the range is to accommodate for losses in the cable system. Essentially, there is a maximum cable loss budget of 30 dB for a 40 dB gain antenna. Depending on the chosen antenna, the loss budget will likely be lower (a 24 dB gain antenna would have a 14 dB loss budget). When designing the internal and external cable assemblies and choosing the RF connectors, do not exceed the loss budget; otherwise, you will compromise the tracking performance of the C rescent. Serial Ports The CrescentCrescent has four serial communication ports: • Port A, Port B, Port C ‐ main ports • Port D ‐ Exclusively used to interface with the SBX beacon board or an external corrections source. This port will not output normal GPS‐related NMEA messages. When communicating into either Port A, B, or C, a v irtual connection may be established to the device on Port D using the $JCONN command. See “Communication Port D” below for more information on Port D. The Crescent serial ports’ 3.3 V CMOS signal level can be translated to interface to other devices. For example, if serial Ports A, B, and/or C are used to communicate to external devices (such as PCs) you must translate the signal level from 3.3 V CMOS to RS‐232. Communication Port D Port D is exclusively for external DGPS correction input to the Crescent, such as from Hemisphere GNSS’ SBX beacon board. USB Ports The Crescent P206 has both a USB host port and a USB device port while P207 has only a USB device ...
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Chapter 2: Board Overview Relevant Device Crescent Pins USB Device + USB USB+ Host Device – USB– Host Device can use USB Type‐B or ...
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Chapter 2: Board Overview Relevant Host Crescent Pins (P206) USB Host + USB USB+ Host Host – USB– Host Host shall use USB Type‐A connector. If Mini‐A is used, “ID” pin 4 is tied to GROUND. Mini‐A connectors are not widely used and this defeats the purpose and usability of USB drives and typical accessories. ...
Chapter 2: Board Overview LED Indicators The Crescent features the following surface‐mounted diagnostic LEDs that indicate board status (see Figure 2‐8): • PWR ‐ Power • GPS ‐ GPS lock • DIFF ‐ Differential lock • DGPS ‐ DGPS position Figure 2‐8: Onboard LEDs With the exception of the power LED the signals that drive the LEDs are available via the header connector. Refer to Table 2‐2 through Table 2‐3 for pin number descriptions for the Crescent. Note: Each signal pin can offer only 1 mA of current and is active low. Since 1 mA of current may be inadequate for the application, you may want to transistor‐buffer these signals to provide more current capacity for acceptable LED luminance. 1PPS Timing Signal The one pulse per second (1 PPS) timing signal is used in applications where devices require time synchronization. Note: 1 PPS is typical of most GPS boards but not essential to normal receiver operation. Do not connect this pin if you do not need this function. The 1 PPS signal is 3.3 V CMOS, active high with rising edge synchronization. The 1 PPS signal is capable of driving a load greater than 10 k in parallel with 10 pF. The pulse is approximately 1 ms. Event Marker Input A GPS solution may need to be forced at a particular instance, not synchronized with GPS time depending on the application, such as indicating to the GPS receiver when a photo is taken from a camera used for aerial photography. ...
Chapter 2: Board Overview Crescent. Speed Radar Output Note: Speed radar output is not essential to normal receiver operation. Do not connect these pins if you do not need this function. The following two pins on the Crescent relate to the Speed Radar. • Speed Radar Pulse ‐ Outputs a square wave with 50% duty cycle. The frequency of the square wave varies directly with speed. 97 Hz represents a speed of 1 m/s (3.28 ft/s). • Speed Radar Ready Signal ‐ Indicates when the speed signal on the Speed Radar Pulse pin is valid. In static situations, such as when the vehicle has stopped, the GPS position may still have slight variations from one moment to the next. During these instances, the signal on the Speed Radar Ready Signal pin is ‘high’ or +Vcc, indicating the speed coming out of the Speed Radar Pulse pin is erroneous and not truly indicative of the GPS receiver’s actual speed. Therefore, it should not be referred to or be used. Once the vehicle starts moving again and meets a minimum threshold speed, the output on the Speed Radar Ready Signal pin will go ‘low,’ indicating valid speed information is present on the Speed Radar Pulse pin. Table 2‐4 provides the location of the Speed Radar Pulse and Speed Radar Ready Signal on the Crescent. Table 2‐4: Crescent speed radar output availability Crescent Board Speed Radar Pulse Speed Radar Ready Signal Crescent (P206) Pin 25 Pin 26 Crescent (P207) N/A N/A Note: Neither pin has any form of isolation or surge protection. If utilizing the Speed Radar Pulse ...
Chapter 2: Board Overview Shielding The Crescent is a sensitive instrument. When integrated into an enclosure, the Crescent requires shielding from other electronics to ensure optimal operation. The Crescent shield design consists of a thin piece of metal with specific diameter holes, preventing harmful interference from penetrating, while still allowing air circulation for cooling. Receiver Mounting The Crescent is a precision instrument. To ensure optimal operation, consider mounting the receiver in a way to minimize vibration and shock. When mounting the Crescent immediately adjacent to the GPS antenna, Hemisphere GNSS highly recommends shielding the board from the LNA of the antenna. This step can be more complex than some integrators initially estimate. Attempt to confirm the operation in your application as early in the project as p ossible. Thermal Concerns The Crescent receiver consumes a few watts of power, which ultimately will generate heat. Since this may raise the ambient temperature inside an enclosure consider managing the heat inside the enclosure to ensure the internal temperature does not exceed the maximum operating temperature for the Crescent. Some suggestions for heat management are heat sinks, heat conductive foam, or using a small cooling fan possibly using a thermal switch. Air moving over the Crescent removes heat very effectively. Note: Thermal design may only be a concern if the integrated product’s maximum design temperature is expected to be close to that of the Crescent. Crescent Integrator Guide 20 PN 875‐0344‐0 Rev A2 ...
Chapter 3: Operation Chapter 3: Operation Powering the Crescent Communicating with the Crescent Configuring the Crescent Firmware Configuring the Data Message Output Saving the Crescent Configuration Using Port D for RTCM Input Configuration Defaults Crescent Integrator Guide 21 PN 875‐0344‐0 Rev A2 ...
Chapter 3: Operation This chapter provides Crescent operation information, such as communicating with the Crescent, firmware, and configuration defaults. Note: Install the antenna outdoors so it has a clear view of the entire sky. If you place the antenna indoors near a window, for example, you will likely not track a sufficient number of satellites. With a properly installed antenna the Crescent provides a position within approximately 60 sec. Powering the Crescent The Crescent is powered by a 3.3 VDC power source. Once you connect appropriate power the Crescent is active. Although the Crescent proceeds through an internal startup sequence upon application of power, it is ready to communicate immediately. Communicating with the Crescent The Crescent features three primary serial ports (Port A, Port B, Port C) that you can configure independently from each other. You can configure the ports for any combination of NMEA 0183, binary, and RTCM SC‐104 data. The usual data output is limited to NMEA data messages as these are industry standard. Note: You may use the three serial ports to separate the different data types and output different rates. If the Crescent is required to output different data types simultaneously, ensure data logging and the processing software used can correctly parse the different data from a single stream. Configuring the Crescent You can configure all aspects of Crescent operation through any serial port using proprietary commands. For information on these commands refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.comand follow the links to Resources, GPS Reference Guide. You can configure the following: • Select one of the two firmware a pplications • Set communication port baud r ates •...
Chapter 3: Operation Firmware The software that runs the Crescent is often referred to as firmware since it operates at a low level. You can upgrade the firmware in the field through any serial port as new versions become available. You can have two firmware applications loaded on the receiver; however, you can only operate one at a time. The Crescent currently ships with the same application loaded in both applications. If you choose to load different firmware in each application, refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GPS Reference Guide) for information on the $JAPP command, which you use to change between the two Crescent applications. Configuring the Data Message Output The Crescent features three primary bidirectional ports (Ports A, B and C) and a differential‐only port (Port D). You can configure messages for all ports by sending proprietary commands to the Crescent through any port. For a complete lists of commands and messages refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GPS Reference Guide) ‘THIS’ Port and the ‘OTHER’ Port Both Port A and Port B use the phrases “THIS” and “OTHER” when referring to themselves and each other in NMEA messages. ‘THIS’ port is the port you are currently connected to for inputting commands. To output data through the same port (‘THIS’ port) you do not need to specify 'THIS' port. For example, when using Port A to request the GPGGA data message be output at 5 Hz on the same port (Port A), issue the following command: $JASC,GPGGA,5<CR><LF> The ‘OTHER’ port is either Port A or Port B, whichever one you are not using to issue commands. If you are using Port A to issue commands, then Port B is the ‘OTHER’ port, and vice versa. To specify the ‘OTHER’ port for the data output you need to include 'OTHER' in the command. For example, if you use Port A to request the GPGGA data message be output at 5 Hz on Port B, issue the following command: $JASC,GPGGA,5,OTHER<CR><LF> When using Port A or Port B to request message be output on Port C, you must specifically indicate (by name) you want the output on Port C. For example, if you use Port A to request the GPGLL data message be output at 10 Hz on Port C, issue the following command: ...
Chapter 3: Operation Saving the Crescent Configuration Each time you change the Crescent’s configuration you may want to save the configuration so you do not have to reconfigure the receiver each time you power it on. To save the configuration, issue the $JSAVE command to the Crescent using a terminal program such as HyperTerminal or either of Hemisphere GNSS’ applications (SLXMon or PocketMax). The Crescent will take approximately five seconds to save the configuration to non‐volatile memory and will indicate when the configuration has been saved. Refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GPS Reference Guide) Using Port D for RTCM Input Port D has been optimized to interface with Hemisphere GNSS’ SBX‐4 beacon board and operates at 9600 baud (8 data bits, no parity and 1 stop bit – 8‐N‐1). To configure the Crescent to use Port D, issue the following command: $JDIFF,BEACON<CR><LF> To return to using SBAS as the correction source, send the following command to the Crescent: $JDIFF,WAAS<CR><LF> For a complete lists of commands and messages refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GPS Reference Guide). Configuration Defaults Below is the standard configuration for the Crescent. For more information on these commands refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GPS Reference Guide). $JOFF,PORTA $JOFF,PORTB $JOFF,PORTC $JBAUD,19200,PORTA $JBAUD,19200,PORTB $JBAUD,19200,PORTC $JAGE,2700 $JLIMIT,10.0 $JMASK,5 $JDIFF,WAAS $JPOS,51.0,-114.0 $JSMOOTH,LONG900 $JAIR,AUTO $JALT,NEVER $JNP,7 $JWAASPRN,AUTO $JTAU,COG,0.00...
Appendix A: Frequently Asked Questions Integration Do I need to use the 1 PPS and event marker? No, these are not necessary for Crescent operation. What should I do with the 1 PPS signal if I do not want to use it? This signal will be strobing at 1 Hz, so it should not be connected. What should I do with the manual mark input if I am not going to use it? Do not connect the pin because this signal is active low. Do I need to use the lock indicators? No, these are present for applications where it is desirable to have an LED visible to the user. These signals need to be transistor‐buffered, as these lines can only offer 1 mA. Depending on the product and the application, LEDs can be very useful to the end user. These signals are active low. Do I need to use a shield‐can for the Crescent? Not necessarily...but you may need to if there are RF interference issues, such as if the Crescent interferes with other devices. A shield‐can would be a good start in terms of investigating the benefit. If you are designing a smart antenna system, one is likely needed. Hemisphere GNSS recommends that you always conduct an RF prescan when integrating OEM boards. If my company wishes to integrate this product, what type of engineering resources will I need to do this successfully? Hemisphere GNSS recommends you have sufficient engineering resources with the appropriate skills in and understanding of the following: • Electronic design (including power supplies and level t ranslation) • RF implications of working with GPS equipment • Circuit design and layout • Mechanical design and ...
Appendix A: Frequently Asked Questions Support and Repair How do I solve a problem I cannot isolate? Hemisphere GNSS recommends contacting the dealer first. With their experience with this product, and other products from Hemisphere GNSS, they should be able to help isolate a problem. If the issue is beyond the capability or experience of the dealer, Hemisphere GNSS Technical Support is available from 8:00 AM to 5:00 PM Mountain Standard Time, Monday through Friday. See “Technical Support” on page i (just before the Contents page) for Technical Support contact information. What do I do if I cannot resolve a problem after trying to diagnose it myself? Contact your dealer to see if they have any information that may help to solve the problem. They may be able to provide some in‐person assistance. If this is not viable or does not solve the problem, Hemisphere GNSS Technical Support is available from 8:00 AM to 5:00 PM Mountain Standard Time, Monday through Friday. See “Technical Support” on page i (just before the Contents page) for Technical Support contact information. Can I contact Hemisphere GNSS Technical Support directly regarding technical problems? Yes, however, Hemisphere GNSS recommends speaking to the dealer first as they would be the local support. They may be able to solve the problem quickly, due to their closer location and experience with our e quipment. Crescent Integrator Guide 27 PN 875‐0344‐0 Rev A2 ...
Appendix A: Frequently Asked Questions Power, Communication, and Configuration My Crescent system does not appear to be communicating. What do I do? This could be one of a few issues: • Examine the Crescent cables and connectors for signs of damage or offset. • Ensure the Crescent system is properly powered with the correct voltage. • Ensure there is a good connection to the power supply since it is required to terminate the power input with the c onnector. • Check the documentation of the receiving device, if not a PC, to ensure the transmit line from the Crescent is connected to the receive line of the o ther device. Also, ensure the signal grounds are c onnected. • If the Crescent is connected to a custom or special device, ensure the s erial connection to it does not have any incompatible signal lines present that prevent proper communication. • Make sure the baud rate of the Crescent matches the other device. The other device must also support an 8 data bit, 1 stop bit, no parity port configuration (8‐N‐1). Some devices support different settings that may be user configurable. Ensure the settings match. • Consult the troubleshooting section of the other device’s documentation to determine if there may be a problem with the e quipment. ...
Appendix A: Frequently Asked Questions How do I change the baud rate of a port from that port? Connect at the current baud rate of the Crescent port and then issue a $JBAUD command to change the port baud rate to the desired rate. Now change the baud rate in your application to the desired rate. What is the best software tool to use to communicate with the Crescent and configure it? Hemisphere GNSS uses three different software applications: ® • HyperTerminal™ ‐ Available on all Windows 95, 98, ME, and XP. This tool allows you to configure the Crescent by directly typing commands into the terminal window. The output from the Crescent is simultaneously shown. When using HyperTerminal, ensure it is configured to use the correct PC communication port and baud rate, and that the local echo feature is on ( to see what is being typed). • SLXMon ‐ Available at www.hemispheregnss.com. This application is a very useful tool for graphically viewing tracking performance and position accuracy, and for recording data. It can also configure message output and port settings. SLXMon runs on Windows 95 or higher. • PocketMax ‐ Available at www.hemispheregnss.com. Similar to SLXMon, you can use this application to graphically view tracking performance and position accuracy, record data, and configure message output and port settings. PocketMax runs on multiple Windows platforms using the Windows .NET framework. GNSS Reception and Performance How do I know what the Crescent is doing? The Crescent supports standard NMEA data messages. The $GPGSV and Bin99 data messages contain satellite tracking and SNR information. If available, the computed position is contained in the $GPGGA message. Additionally, the Crescent has surface‐mounted status LEDs that indicate receiver status. Do I have to be careful when using the Crescent to ensure it tracks properly? ...
Appendix A: Frequently Asked Questions SBAS Reception and Performance How do I know if the Crescent has acquired an SBAS signal? The Crescent outputs the $RD1 message that contains the SBAS Bit Error Rate (BER) for each SBAS channel. The BER value describes the rate of errors received from SBAS. Ideally, this should be zero. However, the Crescent performs well up to 150 BER. The SLXMon and PocketMax utilities provide this information without needing to use NMEA commands. How do I know if the Crescent is offering a differentially‐corrected or RTK‐corrected position? The Crescent outputs the $GPGGA message as the main positioning data message. This message contains a quality fix value that describes the GPS status. If this value is 2, the position is differentially corrected; if this value is 5, the position is RTK‐corrected. The SLXMon and PocketMax utilities provide this information without needing to use NMEA commands. How do I select an SBAS satellite? By default the Crescent will automatically attempt to track the appropriate SBAS satellites. If multiple satellites are available, the one with the lowest BER value is selected to be used to decode the c orrections. You can manually select which SBAS satellites to track—refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GPS Reference Guide) for more information; however, this is not recommended. Should I be concerned if the Crescent is frequently losing lock on SBAS due to obstructions or low satellite elevation angles at my geographic location? No, provided the receiver is receiving a full set of corrections relatively often. Using COAST technology, the Crescent is able to perform well for 40 minutes or more with aging correction data. Similar to DGPS corrections, accuracy degrades over time and distance. To obtain a full set of corrections the Crescent antenna receives the ionospheric map over a period of a few minutes. This is the minimum amount of time required to get a full set of corrections for SBAS operation. After this, the receiver can coast until the next set of corrections have been received. Accuracy is a function of correction age and current ionospheric activity, which will increase in the coming years. ...
Appendix A: Frequently Asked Questions External Corrections My Crescent system does not appear to be using DGPS or RTK corrections from an external correction source. What could be the problem? This could be due to a number of factors. To isolate the issue: • Make sure DGPS corrections are RTCM v2.3 p rotocol. • Make sure RTK corrections are either ROX, RTCM v3, CMR, or CMR+ protocol. • Verify the baud rates used by the Crescent match that of the e xternal correction source. • The external correction should be using an 8 data bit, no parity, 1 stop bit (8‐N‐1) serial port configuration. • Inspect the cable connection to ensure there is no d amage. • Check the pinout information for the cables to ensure the transmit line of the external correction source is connected to the receive line of the Crescent’s serial port and that the signal grounds are c onnected. • Make sure the Crescent has been set to receive external corrections by issuing the $JDIFF command. Refer to the Hemisphere GNSS Technical Reference (go to www.hemispheregnss.com and follow the links to Resources, GPS Reference Guide) f or more information. ...
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Appendix B: Troubleshooting Use the following checklist to troubleshoot anomalous Crescent operation. Table B‐1 provides a list of issues with possible solutions. Refer to Appendix C, “Technical Specifications” if necessary. Table B‐1: Troubleshooting Issue Possible Solution What do I do initially if I have a Try to isolate the source of the problem. Problems are likely problem with the operation of the to fall within one of the following categories: Crescent? • Power, communication, and configuration • GPS reception and performance • Beacon reception and performance • SBAS reception and p erformance • External corrections • Installation • Shielding and isolating i nterference It is important to review each category in detail in order to eliminate it as a problem. Receiver fails to power • Verify polarity of power leads •...
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Appendix B: Troubleshooting Table B‐1: Troubleshooting Issue Possible Solution No GPS lock • Check integrity of antenna c able • Verify antenna’s view of the sky • Verify the lock status and signal to noise ratio of GPS satellites (this can often be done on the receiving device or by using SLXMon) No SBAS • Check antenna cable i ntegrity • Verify antenna’s view of the sky, e specially towards that SBAS satellites, south in the northern hemisphere • Verify the bit error rate and lock status of SBAS satellites (this can often be done on the receiving device or by using SLXMon ‐ monitor BER value) No DGPS position in external • Verify that the baud rate of the RTCM input port RTCM mode matches the baud rate of the external s ource •...
Appendix C: Technical Specifications P206 Specifications Table C‐21 through Table C‐25 provide specifications for the P206. Table C‐1: P206 sensor specifications Item Specification Receiver type GPS, GLONASS and BeiDou L1 RTK with carrier phase Channels 12 L1CA GPS 12 L1P GPS 12 L1 GLONASS 22 B1 BeiDou 3 SBAS or 3 additional L1CA GPS * with subscription code Note: L‐band support available with optional Hemisphere GNSS LX‐2 OEM board. GPS sensitivity ‐142 dBm SBAS tracking 3‐channel, parallel tracking Update rate 1 Hz standard, 10 Hz and 20 Hz available Horizontal accuracy RMS (67%) 2DRMS (95%) 1,2 10 mm + 1 ppm 20 mm + 2 ppm 1 SBAS (WAAS) 0.6 m 0.3 m 1 ...
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Appendix C: Technical Specifications Table C‐3: P206 power specifications Item Specification Input voltage 3.3 VDC +/‐ 5% Power consumption < 1.4 W nominal Current consumption 420 mA nominal GPS, GLONASS and BeiDou Antenna voltage input 15 VDC maximum Antenna short circuit protection Yes Antenna gain input range 10 to 40 dB Antenna input impedance 50 Table C‐4: P206 environmental specifications Item Specification Operating temperature ‐40°C to +85°C (‐40°F to +185°F) Storage temperature ‐40°C to +85°C (‐40°F to +185°F) Humidity 95% non‐condensing (when installed in an enclosure) Shock and vibration Vibration: EP455 Section 5.15.1 Random Mechanical Shock: EP455 Section 5.14.1 Operational (when mounted in an enclosure with screw mounting holes utilized) ...
Appendix C: Technical Specifications P207 Specifications Table C‐26 through Table C‐30 provide specifications for the P207. Table C‐6: P207 sensor specifications Item Specification Receiver type GPS, GLONASS and BeiDou L1 RTK with carrier phase Channels 12 L1CA GPS 12 L1P GPS 12 L1 GLONASS 22 B1 BeiDou 3 SBAS or 3 additional L1CA GPS * with subscription code Note: L‐band support available with optional Hemisphere GNSS LX‐2 OEM board. GPS sensitivity ‐142 dBm SBAS tracking 3‐channel, parallel tracking Update rate 1 Hz standard, 10 Hz and 20 Hz available Horizontal accuracy RMS (67%) 2DRMS (95%) 1,2 10 mm + 1 ppm 20 mm + 2 ppm 1 SBAS (WAAS) 0.6 m 0.3 m 1 ...
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Appendix C: Technical Specifications Table C‐8: P207 power specifications Item Specification Input voltage 3.3 VDC +/‐ 5% Power consumption < 1.4 W nominal Current consumption 420 mA nominal GPS , GLONASS and BeiDou Antenna voltage input 15 VDC maximum Antenna short circuit protection Yes Antenna gain input range 10 to 40 dB Antenna input impedance 50 Table C‐9: P207 environmental specifications Item Specification Operating temperature ‐40°C to +85°C (‐40°F to +185°F) Storage temperature ‐40°C to +85°C (‐40°F to +185°F) Humidity 95% non‐condensing (when installed in an enclosure) Shock and vibration Vibration: EP455 Section 5.15.1 Random Mechanical Shock: EP455 Section 5.14.1 Operational (when mounted in an enclosure with screw mounting holes utilized) ...
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Appendix C: Technical Specifications 1 Depends on multipath environment, number of satellites in view, satellite geometry, and ionospheric activity 2 Depends also on baseline length 3 Requires an L‐band subscription 4 Receive only, does not transmit this format 5 When integrated in conjunction with the recommended shielding and protection as outlined in this manual Crescent Integrator Guide 42 PN 875‐0344‐0 Rev A2 ...
Index Index Numerics E , , , , , 1 PPS timing signal 4 e‐Dif 3 , 40 environmental specifications P302 board 39 B P303 board 41 event marker input 18 binary messages 22 board F communicating with 22 configuring 22 features common to all boards 3 connectors 9 firmware 23 firmware 23 headers 11 G integration 3 GPS LED indicator 18 GPS lock LED indicators 18 ...
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Index N R NMEA 0183 messages 22 receiver mounting 20 RF input 15 O RTCM input 24 , , RTK 6 31 OTHER port 23 S P saving board configuration 24 SBX‐ P200 board 4 beacon board 24 sensor mechanical layout 7 specifications pinouts 12 P302 board 38 P201 board P303 board 40 mechanical layout 8 serial ports 15 P202 board shielding 20 mechanical layout 7 signals pinouts 12 communication Port D 15 RF P300 board input 15 ...
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positioning and navigation accuracy obtainable with the Software as stated in the Product or Software documentation serves to provide only an estimate of achievable accuracy based on specifications provided by the US Department of Defense for GPS positioning and DGPS service provider performance specifications, where applicable. WARRANTY DISCLAIMER. EXCEPT AS EXPRESSLY SET OUT IN THIS AGREEMENT, HEMISPHERE MAKES NO REPRESENTATION, WARRANTY OR CONDITION OF ANY KIND TO LICENSEE, WHETHER VERBAL OR WRITTEN AND HEREBY DISCLAIMS ALL REPRESENTATIONS, WARRANTIES AND CONDITIONS OF ANY KIND INCLUDING FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, ACCURACY, RELIABILITY OR THAT THE USE OF THE SOFTWARE WILL BE UNINTERRUPTED OR ERROR‐FREE AND HEREBY DISCLAIMS ALL REPRESENTATIONS, WARRANTIES AND CONDITIONS ARISING AS A RESULT OF CUSTOM, USAGE OR TRADE AND THOSE ARISING UNDER STATUTE. LIMITS ON WARRANTY DISCLAIMER. Some jurisdictions do not allow the exclusion of implied warranties or conditions, so some of the above exclusions may not apply to Licensee. In that case, any implied warranties or conditions which would then otherwise arise will be limited in duration to ninety (90) days from the date of the license of the Software or the purchase of the Product. The warranties given herein give Licensee specific legal rights and Licensee may have other rights which may vary from jurisdiction to jurisdiction. CHANGE TO WARRANTY. No employee or agent of Hemisphere is authorized to change the warranty provided or the limitation or disclaimer of warranty provisions. All such changes will only be effective if pursuant to a separate agreement signed by senior officers of the respective parties. WARRANTY CLAIM. In the event Licensee has a warranty claim Licensee must first check for and install all Updates that are made available. The warranty will not otherwise be honored. Proof of purchase may be required. Hemisphere does not honor claims asserted after the end of the Warranty Period. LICENSEE REMEDIES. In all cases which involve a failure of the Software to conform in any material respect to the documentation during the Warranty Period or a breach of a warranty, Hemisphere's sole obligation and liability, and Licensee's sole and exclusive remedy, is for Hemisphere, at Hemisphere's option, to (a) repair the Software, (b) replace the Software with software conforming to the documentation, or (c) if Hemisphere is unable, on a reasonable commercial basis, to repair the Software or to replace the Software with conforming software within ninety (90) days, to terminate this Agreement and thereafter Licensee shall cease using the Software. Hemisphere will also issue a refund for the price paid by Licensee less an amount on account of amortization, calculated on a straight‐line basis over a deemed useful life of three (3) years. LIMITATION OF LIABILITY. IN NO EVENT WILL HEMISPHERE BE LIABLE TO LICENSEE FOR ANY INCIDENTAL, CONSEQUENTIAL, SPECIAL OR INDIRECT DAMAGES INCLUDING ARISING IN RELATION TO ANY LOSS OF DATA, INCOME, REVENUE, GOODWILL OR ANTICIPATED SAVINGS EVEN IF HEMISPHERE HAS BEEN INFORMED OF THE POSSIBILITY OF SUCH LOSS OR DAMAGE. FURTHER, IN NO EVENT WILL HEMISPHERE'S TOTAL CUMULATIVE LIABILITY HEREUNDER, FROM ALL CAUSES OF ACTION OF ANY KIND, EXCEED THE TOTAL AMOUNT PAID BY LICENSEE TO HEMISPHERE TO PURCHASE THE PRODUCT. THIS LIMITATION AND EXCLUSION APPLIES IRRESPECTIVE OF THE CAUSE OF ACTION, INCLUDING BUT NOT LIMITED TO BREACH OF CONTRACT, NEGLIGENCE, STRICT LIABILITY, TORT, BREACH OF WARRANTY, MISREPRESENTATION OR ANY OTHER LEGAL THEORY AND WILL SURVIVE A FUNDAMENTAL BREACH. LIMITS ON LIMITATION OF LIABILITY. Some jurisdictions do not allow for the limitation or exclusion of liability for incidental or consequential damages, so the above limitation or exclusion may not apply to Licensee and Licensee may also have other legal rights ...
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TERMINATION. Licensee may terminate this Agreement at any time without cause. Hemisphere may terminate this Agreement on 30 days notice to Licensee if Licensee fails to materially comply with each provision of this Agreement unless such default is cured within the 30 days. Any such termination by a party shall be in addition to and without prejudice to such rights and remedies as may be available, including injunction and other equitable remedies. Upon receipt by Licensee of written notice of termination from Hemisphere or termination by Licensee, Licensee shall at the end of any notice period (a) cease using the Software; and (b) return to Hemisphere (or destroy and provide a certificate of a Senior Officer attesting to such destruction) the Software and all related material and any magnetic or optical media provided to Licensee. The provisions of Sections 6), 7), 8), 9), 10), 15), 21), 26) and 27) herein shall survive the expiration or termination of this Agreement for any reason. EXPORT RESTRICTIONS. Licensee agrees that Licensee will comply with all export control legislation of Canada, the United States, Australia and any other applicable country's laws and regulations, whether under the Arms Export Control Act, the International Traffic in Arms Regulations, the Export Administration Regulations, the regulations of the United States Departments of Commerce, State, and Treasury, or otherwise as well as the export control legislation of all other c ountries. PRODUCT COMPONENTS. The Product may contain third party components. Those third party components may be subject to additional terms and conditions. Licensee is required to agree to those terms and conditions in order to use the Product. FORCE MAJEURE EVENT. Neither party will have the right to claim damages as a result of the other's inability to perform or any delay in performance due to unforeseeable circumstances beyond its reasonable control, such as labor disputes, strikes, lockouts, war, riot, insurrection, epidemic, Internet virus attack, Internet failure, supplier failure, act of God, or governmental action not the fault of the non‐performing party. FORUM FOR DISPUTES. The parties agree that the courts located in the State of Arizona and the courts of appeal there from will have exclusive jurisdiction to resolve any disputes between Licensee and Hemisphere concerning this Agreement or Licensee's use or inability to use the Software and the parties hereby irrevocably agree to attorn to the jurisdiction of those courts. Notwithstanding the foregoing, either party may apply to any court of competent jurisdiction for injunctive r elief. APPLICABLE LAW. This Agreement shall be governed by the laws of the State of Arizona, exclusive of any of its choice of law and conflicts of law jurisprudence. CISG. The United Nations Convention on Contracts for the International Sale of Goods will not apply to this Agreement or any transaction h ereunder. GENERAL. This is the entire agreement between Licensee and Hemisphere relating to the Product and Licensee's use of the same, and supersedes all prior, collateral or contemporaneous oral or written representations, warranties or agreements regarding the same. No amendment to or modification of this Agreement will be binding unless in writing and signed by duly authorized representatives of the parties. Any and all terms and conditions set out in any correspondence between the parties or set out in a purchase order which are different from or in addition to the terms and conditions set forth herein, shall have no application and no written notice of same shall be required. In the event that one or more of the provisions of this Agreement is found to be illegal or unenforceable, this ...
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Hemisphere GNSS Inc. 8515 E. Anderson Drive Scottsdale, AZ 85255, USA Phone: 1 480 348 6380 Fax:...
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