RX 400p User Guide Midwest Technologies Illinois, LLC 2733 E. Ash St. Springfield, IL 62703 Telephone number: 217-753-8424 Fax number: 217-753-8426 E-mail address: custserve@mid-tech.com Web Site: www.mid-tech.
RX 400p 98-05044 R1 2
RX 400p Copyright Notice Copyright 2001 Midwest Technologies Illinois, LLC. All rights reserved. No part of this manual may be stored in a retrieval system, transmitted, or reproduced by any means, including, but not limited to photocopy, photograph, digitizing, or otherwise, without the prior written permission from MID-TECH Inc. Trademarks MID-TECH and the MID-TECH logo are registered trademarks of Midwest Technologies Illinois, LLC. All other trademarks are the property of their respective owners.
RX 400p MID-TECH Limited Warranty MIDWEST TECHNOLOGIES ILLINOIS, LLC (herein called MID-TECH) warrants to the original purchaser that the product purchased shall be free of defect in material or workmanship. If the product proves to be defective within the warranty period the purchaser must return, freight prepaid, said product to MID-TECH within thirty (30) days after such defect is discovered.
RX 400p WARRANTY LIMITATIONS AND EXCLUSIONS MID-TECH will have no warranty obligation hereunder if the product is subjected to abuse, misuse, improper or abnormal usage, acts of God, faulty installation, improper maintenance as outlined in MID-TECH’s product operator manual or service bulletins. Consumable items (items that are used during normal operation) such as light bulbs, batteries, etc., and expendable items (items which wear out in normal use) such as injection pump tubes, flow meter bearings, etc.
RX 400p MID-TECH does not warrant or guarantee the precision or accuracy of positions obtained when using MID-TECH products.
RX 400p Table of Contents List of Figures.............................................................................................................xi List of Tables .............................................................................................................xii Preface.......................................................................................................................xiii Organization ......................................................................................
RX 400p 1.4.5 1.5 2 2.2 2.3 2.4 2.5 4 Mounting Accessories ........................................................................... 1-11 1.5.1 Magnetic Mount........................................................................ 1-11 1.5.2 Survey Adapter ......................................................................... 1-11 RX 400p Overview.......................................................................................... 2-1 2.1 3 Connecting the CDA-2B Antenna ..............
RX 400p 4.4 Receiver Status Icons ...............................................................................4-2 4.4.1 Position Fix Status Icon ...............................................................4-3 4.4.2 WAAS Lock Icon ........................................................................4-3 4.4.3 OmniSTAR Lock Icon.................................................................4-4 4.4.4 Beacon Lock Icon ........................................................................
RX 400p 4.12 Beacon Menu......................................................................................... 4-54 4.12.1 Beacon Signal Status Menu ...................................................... 4-56 4.12.2 Beacon Configure Menu ........................................................... 4-59 4.13 External RTCM Menu........................................................................... 4-61 4.14 Autonomous Menu ................................................................................
RX 400p 6.2 NMEA Message Elements .......................................................................6-1 6.3 RX 400p Serial Port Configuration..........................................................6-2 6.4 SLXMon...................................................................................................6-2 6.5 GPS NMEA Data Messages.....................................................................6-3 6.5.1 GGA Data Message .............................................................
RX 400p 11 Appendix D - Beacon Information..................................................... 11-1 12 Index .....................................................................................................
RX 400p List of Figures Figure 2-1 Cable Interface ......................................................................................1-2 Figure 2-2 RX 400P Socket Connector Pin Numbering .......................................1-6 Figure 2-3 RX 400P Interface .................................................................................1-6 Figure 5-1 RX 400P Display and Keypad ..............................................................4-1 Figure 5-2 Menu Access Icon ...............................
RX 400p List of Tables Table 2-1 Power Requirements of the RX 400P ................................................... 1-3 Table 2-2 MAIN Port Pin-out, RS-232C Interface Level .................................... 1-5 Table 2-3 AUX Port Pin-out, RS-232C Interface Level....................................... 1-5 Table 3-1 Beacon Receiver Performance - SNR Reading.................................... 2-7 Table 3-2 Preset DGPS Mode.................................................................................
RX 400p Preface Welcome to the RX 400p User Guide and congratulations on purchasing this highperformance positioning tool. This is the third generation all-in-one receiver, which incorporates a number of improvements over the previous generation including support of the Wide Area Augmentation System (WAAS) and other Space Based Augmentation Systems (SBAS), and an improved menu system.
RX 400p Organization This manual contains the following chapters: Chapter 1: Installation - describes how to install the RX 400p receiver and antenna, and provides a foundation for interfacing the RX 400p with an external data logging or monitoring device. Chapter 2: RX 400p Overview - provides details on the fundamental operating modes of the internal sensors of the RX 400p. Chapter 3: RX 400p Architecture - provides a description of the integration of the RX 400p.
RX 400p Appendix C: Activating OmniSTAR DGPS Service - provides you with information on how to enable an OmniSTAR subscription within your receiver. Appendix D: Beacon Information - provides a reference for DGPS beacon transmitter sites and general information. Appendix E: Post-Processing - describes how the RX 400p may be used as a post-processing DGPS tool. The Further Reading section provides a listing of GPS/DGPS sources for further information.
RX 400p before returning any product to MID-TECH. If you are returning a product for repair, you must also provide a fault description before MID-TECH will issue an RMA number. When providing the RMA number, MID-TECH will provide you with shipping instructions to assist you in returning the equipment. World Wide Web Site MID-TECH maintains a World Wide Web home page at the following address: www.mid-tech.com A corporate profile and product information are available at this site.
RX 400p Document Conventions Bold is used to emphasize certain points. This font indicates information presented on the display of the receiver. This icon indicates that you should press the up arrow button of the receiver keypad. This icon indicates that you should press the Enter button of the receiver keypad. This icon indicates that you should press the down arrow button of the receiver keypad.
RX 400p 1 Installation This chapter contains instructions and recommendations for the installation of the RX 400p receiver and CDA-2B antenna. 1.1 System Parts List The following list of standard equipment is included with the RX 400p Receiver system: RX 400p CDA-2B Antenna Power Cable Antenna Cable Data Cable Magnetic Mount Kit User Guide 1.2 Receiver Layout and Connections The RX 400p receiver is easily installed requiring only power, data, antenna, and ground connections.
RX 400p Figure 1-1 Cable Interface 1.3 Installing the RX 400p Receiver To ensure optimum receiver performance and ease of operation, follow the guidelines presented in the following sections. 1.3.1 Receiver Placement The flange mounting bracket supplied with the RX 400p is used to secure the receiver to the selected mounting surface.
RX 400p the bottom of the RX 400p. Use the mounting brackets as a template when planning and drilling mounting holes. When selecting a location to install the receiver, you should ensure that: The receiver is within reach of power, data, and antenna cable connections. Sufficient room is available at the back of the receiver to connect and disconnect the power, data, antenna, and ground cables. Once you have installed the receiver, cables will not be bent excessively or pinched.
RX 400p 1.3.4 Turning the RX 400p On When connected to a suitable power source, the RX 400p may be turned on and off using the On/Off switch located on the rear panel. To turn the RX 400p on: Connect the red wire of the supplied power cable to DC positive (+). Connect the black wire of the supplied power cable to DC negative (-). Connect the keyed, two-conductor socket connector of the power cable to the RX 400p.
RX 400p on the rear panel, labeled ‘MAIN’ and ‘AUX’ to transmit and receive data (refer to Appendix B Interface Information). MAIN is the primary interface port for differentially corrected GPS data. The AUX port is a secondary port designed for input of external RTCM correction data. In the case that an external differential source is required, you may configure the RX 400p using the menu system to accept the external correction data through the AUX port.
RX 400p 54 321 987 6 Figure 1-2 RX 400p Socket Connector Pin Numbering Figure 1-3 illustrates the standard interface for the RX 400p when interfaced to an external device: M A IN ExternalD evice 5GND GND 3 RX N M E A /B inary T X 2TX N M E A /B inary R X Figure 1-3 RX 400p Interface Refer to Appendix B for further interface information when operating in the RX 400p with various correction sources.
RX 400p 1.4 Installing the CDA-2B Antenna The location chosen for installation of the CDA-2B antenna will influence the overall performance of the RX 400p receiver. When installing the antenna: Choose a location with a clear, unobstructed view of the sky. This is important for GPS, WAAS, and OmniSTAR signal reception. Choose a location that is at least three feet away from all forms of transmitting antennas, communications, and electronic equipment.
RX 400p 1.4.2 Antenna Installation – 1-14-UNS Threaded Mount The CDA-2B uses a 1-14-UNS-2B thread for mounting, which is not compatible with ¾ NPT or pipe threads. A magnetic mount accompanies the standard RX 400p system. An adapter to convert the 1-14-UNS thread to a 5/8th inch survey-style thread is available from MID-TECH, discussed in Section 1.5.3. Thread the CDA-2B Antenna onto the mount, tightening by hand only. Do not use any tools for tightening, and do not over-tighten.
RX 400p Note - The screw holes are not symmetric so that the PVC base cannot be improperly installed on the antenna. As such, you will have to place the base on the bottom face of the mounting surface when marking the screw holes, before drilling. Do not place the base upside down on the top face of the mounting surface, as the resulting screw holes will not line up correctly. 1.4.
RX 400p Thread the other end of the antenna extension cable to the TNC socket connector on the rear panel of the RX 400p, labeled CDA-2B. Caution - Be sure to always connect the antenna to the RX 400p before you turn the receiver on.
RX 400p 1.5 Mounting Accessories MID-TECH offers various mounting accessories as discussed in the following sections. 1.5.1 Magnetic Mount Included with a standard system, the magnetic mount (PN 725-0007-012) can be used to install the CDA-2B antenna on any ferrous surface including the roof of a vehicle. It consists of a mounting extension two inches long, attached to a circular metal disk, housing a magnet.
RX 400p 2 RX 400p Overview For your convenience, all internal sensors within the RX 400p feature automatic tuning algorithms, which are in operation by default. When powered for the first time, the RX 400p receiver will perform a ‘cold start’, which involves acquiring the available GPS satellites in view and the WAAS differential service. If WAAS is not available in your area, either of the other two internal differential sensors, the beacon or L-band receiver, may be used.
RX 400p The estimated positioning precision is accessible through the menu system of the RX 400p receiver. Although this feature is intended for advanced users, it will provide the real-time estimates of precision. As the receiver is not able to determine accuracy with respect to a known location in real time (this is traditionally performed in postmission analyses), the precision numbers are relative in nature. More about this feature is discussed in Section 4.9.1.1.
RX 400p The BER number indicates the number of unsuccessfully decoded symbols in a moving window of 2048 symbols. Due to the use of forward error correction algorithms, one symbol is composed of two bits. A lower BER indicates that data is being successfully decoded with fewer errors, providing more consistent throughput. The BER numbers for both satellites, if available in your region, are presented in the menu system of the RX 400p. The bit error rate has a default, no-lock value of 500 or more.
RX 400p The CDA-2B Antenna is designed with sufficient gain at low elevation angles to perform well at higher latitudes where the signal power is lower and the satellite appears lower on the horizon. The BER number indicates the number of unsuccessfully decoded symbols in a moving window of 2048 symbols. Due to the use of forward error correction algorithms, one symbol is composed of two bits. The bit error rate has a default, no-lock value of 500.
RX 400p default, selecting and tuning to the most appropriate beacon without operator intervention. The RX 400p’s internal beacon receiver uses its two independent beacon channels to identify and lock to DGPS beacons without interrupting the continuous flow of RTCM data to the GPS receiver. ABS mode is ideal for navigation applications over considerable areas, eliminating the need for operator intervention when transitioning from one beacon coverage zone to another.
RX 400p The RX 400p stores the current primary beacon in memory so that it is available upon subsequent power-up. You may force a new Global Search at any time using the display and keypad by selecting the Auto Tune@ menu item as discussed in Section 4.12.2. 2.4.1.4 Manual Tracking In Manual tune mode, you may select a specific frequency and bit rate for the receiver to tune, or specify the frequency only, allowing the RX 400p to identify the correct MSK bit rate on its own.
RX 400p Table 2-1 Beacon Receiver Performance - SNR Reading SNR Reception Description Approximate Data Throughput >25 20 to 25 15 to 20 10 to 15 7 to 10 <7 Excellent Very Good Good Stable Intermittent No Lock 100% data throughput 100% data throughput Good data throughput up to 100% Moderate to good data throughput Low data throughput No data throughput A graphical presentation of the reception quality is provided in the signal tracking bar chart. Refer to Section 4.7 for further information. 2.
RX 400p Table 2-2 Preset DGPS Mode DGPS Mode WAAS Table 2-3 Preset Port Settings Serial Port Baud Rate Data Bits Parity Stop Bit Interface Level MAIN 9600 8 None 1 RS-232C AUX 9600 8 None 1 RS-232C Table 2-4 Preset GPS NMEA Message Output GPS NMEA Messages GGA, GSV, VTG, ZDA 98-05044 R1 Update Rate 1 Hz Max DGPS Age 1800 seconds 2-8 Elevation Mask 5°
RX 400p 3 RX 400p Architecture The RX 400p receiver is comprised of two main components – hardware and software. This chapter provides an overview of the hardware and software architecture of the RX 400p receiver in order to provide further insight into the operation of the product. As the RX 400p receiver supports the following services, it requires receiving capability for each: GPS WAAS OmniSTAR Beacon 3.
RX 400p As the software that operates the internal components of the RX 400p operates at a low level, it is often referred to as firmware. There are three types of firmware within the SLX - DSP, ARM, and menu system firmware. Each of these types of firmware may be upgraded in the field through the MAIN serial port, as new revisions become available. The SBX beacon receiver that resides on-board the SLX incorporates its own version of firmware.
RX 400p 4 Operation This chapter introduces the display and keypad features of the RX 400p, operating modes, menu structure, and receiver default operating parameters. 4.1 Front Display and Keypad The RX 400p features a 2-line by 16-character LCD and 3-button keypad. The keypad is composed of an up arrow , enter , and down arrow key. Figure 41 shows the display and keypad of the RX 400p receiver.
RX 400p 4.2 Navigating the Menu System The keypad on the front of the RX 400p allows you to navigate through the intuitive menu system, configuring operating parameters and viewing status information. The top line of the display is the active Focus Line for keypad operations. Menu items that are being accessed must be on the top line of the display for the desired effect to occur. Note - The top line of the RX 400p display is the Focus Line.
RX 400p 4.4.1 Position Fix Status Icon The RX 400p provides an indication of the GPS lock status, as contained within the GPGGA data message string output from the data port of the receiver. This indicator is located in the lower right hand corner of the RX 400p display. Figure 43, illustrates the three states of the GPS status icon.
RX 400p a A No WAAS Lock WAAS Lock Figure 4-4 WAAS Lock Icon 4.4.3 OmniSTAR Lock Icon When operating using the internal L-band receiver as the differential source, the RX 400p receiver indicates the OmniSTAR DGPS lock status in the upper right corner of the display. The lock symbol, illustrated in Figure 4-5, remains in the ‘No L-band’ DGPS Lock state until the receiver has acquired the DGPS satellite transmission at which point the symbol changes to the ‘L-band Lock’ icon.
RX 400p 4.4.4 Beacon Lock Icon When using the internal beacon sensor as the differential source, the RX 400p indicates beacon lock status in the upper right hand corner of the display. The lock symbol, illustrated in Figure 4-6, remains in the closed position when the RX 400p is locked to a valid beacon signal, and open, when no broadcast is available for the specified frequency and/or MSK bit rate.
RX 400p 4.4.6 Autonomous Mode Icon The Icon shown in the following figure indicates that the receiver is configured to position autonomously, with no DGPS correction source. @ Figure 4-8 Autonomous Mode Icon 4.5 RX 400p Menu System Overview This section shows you how to navigate through the menu system of the RX 400p receiver, change operating modes, monitor position and status information, and change receiver configuration. Figures 4-9 to 4-15 illustrate the various menus in the menu system.
RX 400p `??51!00.131035A ~_114!00.273158^ Hgt?1030.40m Hdg 187.3!t Vel 10.5?kph Time?11:32:45.2 Age?? 5.6?s SV Count 07 HDOP 1.3 Precision@ NavCnd@ ABBABB DSP_ARM@1F_1F Back@ Top Menu@ ENTER Res rms: 0.3m?A =_a:??????0.2m?^ =_b:??????0.1m Azimuth:163.1! =_Lat:????0.2m? =_Lon:????0.2m =_Alt:????0.
RX 400p Figure 4-10 WAAS Menu ^123321333123+32 444444444444 44 ENTER ENTER ENTER GPS@???????????+ OmniSTAR@ ? ^ Config Wizard@ System Setup@ ENTER Signal Status@ + Configure@ ^ Back@ Top Menu@ F 1551489/1200 + BER?001 AA ^ Difstatus@ LN?? _101.0! Elevation?31.6! Azimuth??163.
RX 400p ^123321333124$32 444444444444 44 ENTER Diff@Beacon ENTER F? Auto/Auto AA$ SS 54?SNR?26? ^ MTP?100>?Q?25? Unselected?Bx ID?0001??H?01 Back@ Top?Menu@ < Tune@ Auto Auto< Beacon Receiver Auto Scanning ENTER ENTER GPS@???????????$ Beacon@ ? ^ Config Wizard@ System Setup@ ENTER Signal Status@ $ Configure@ ^ Back@ Top Menu@ ENTER ENTER Diff@Beacon? $ Tune@Auto?Auto?^ Auto Tune@ TuneBeaconName@ Table Version@ Back@ Top?Menu@ ENTER Africa Asia Australia Central?America Europe North?America S
RX 400p ^12332133312? 444444444444 ENTER GPS@???????????@ Autonomous@ ^ Config Wizard@ System Setup@ ENTER No Diff Source @ Diff@Autonomous^ Back@ Top Menu@ Figure 4-14 Autonomous Menu In Use: WAAS Other : OmniSTAR ENTER GPS@???????????A WAAS@ ? ^ Config Wizard@ System Setup@ ENTER ENTER Display Apps@ A Display Format@^ Baud Rates@ Software Disp@ Back@ Top Menu@ DispUpdate@5 HzA LL Unit@DM.
RX 400p 4.6 Start-Up Sequence When you turn the RX 400p on, it will sequence through a startup screen followed by a prompt asking if you’d like to use the Configuration Wizard. This prompt has a 3second timeout where the receiver will proceed to the Position Status menu unless the button is pressed. If is pressed, the menu system will begin the Configuration Wizard. Consult Chapter 6 for further information on the Configuration Wizard. 4.
RX 400p 4.7.1 WAAS Mode Bar Chart When operating the RX 400p receiver in WAAS mode, the portion of the bar chart to the right of the WAAS mode indicator, A, reflects WAAS tracking performance. The WAAS bar chart will reflect the quality of the bit error rate (BER) for WAAS signal reception. A higher bar is indicative of a better BER. A good BER is zero and no lock is 500 or greater.
RX 400p ^1233213331 4444444444 4.7.3 +4 4 Beacon Mode Bar Chart When operating the RX 400p receiver in beacon mode, the portion of the bar chart to the right of the beacon mode indicator, $, reflects tracking performance. The beacon bar chart will reflect the quality of the signal strength (SS) and the signal to noise ration (SNR) for beacon signal reception. A higher bar is indicative of better signal variables.
RX 400p ^1233213331 4444444444 4.7.5 ? Autonomous Mode Bar Chart When operating the RX 400p receiver in autonomous mode, the portion of the bar chart to the right will display the autonomous icon @. No associated status data is provided for this mode of operation. ^1233213331 4444444444 @ 4.8 Main Menu The RX 400p will display the following menu when the boot sequence has been completed upon startup. This is the top, or Main menu.
RX 400p GPS@ When this menu is accessed using the button, the menu system displays the contents of the GPS menu, providing access to position and satellite information, and access to GPS setup parameters. WAAS@ When this menu is accessed using the button, the RX 400p menu displays the contents of the DGPS menu. Depending on the differential mode of operation, this menu will be named WAAS, OmniSTAR, Beacon, Extern RTCM, or Autonomous.
RX 400p The GPS@ menu contains sub-menus that provide access to position and satellite status information, and GPS receiver configuration parameters. Please note that the icon in the lower corner of the display will change according to the GPS fix as shown in Figure 4-3. This portion of the menu system, including submenus, is detailed in Figure 4-9. PositionStatus@+ Satellites@????^ Configure@ Back@ Top Menu@ Pressing the and keys in this menu allows you to scroll through the available menu items.
RX 400p Configure@ Entering this menu using the button will allow you to change various configuration parameters related to the GPS receiver inside the RX 400p. This includes NMEA message output settings, elevation cut-off mask, differential time-out, and UTC offset. Back@ When accessed using the button, this menu item returns the menu system to the previous menu. Top Menu@ When accessed using the button, this menu item returns the menu system to the main menu. 4.9.
RX 400p `??51!00.131035A ~_114!00.273158^ Hgt?1030.40m Hdg 187.3!t Vel 10.5?kph Time?11:32:45.2 Age?? 5.6?s SV Count 07 HDOP 1.3 Precision@ NavCnd@ ABBABB DSP_ARM@1B_1F Back@ Top Menu@ Pressing the and keys allows you to scroll through the available menu items. Pressing the button anywhere in this menu will provide a bar chart of signal tracking information.
RX 400p `??51!00.131035 This menu item displays the current antenna latitude in degrees / minutes / decimal minutes (DM.M) by default. Other display formats are possible, including degrees / decimal degrees (D.D) and degrees / minutes / seconds (DMS). These other display formats are discussed in further detail in Section 4.15.2. Latitude information is parsed from the GPGGA NMEA message.
RX 400p Longitude information is parsed from the GPGGA NMEA message. The longitude, measured to the phase center of the antenna, is usually referenced to the WGS-84 ellipsoid, however, some DGPS services result in a position relating to the North American Datum 1983 (NAD-83). This datum is essentially equivalent to this ellipsoid, considering the level of accuracy of this product. Hgt 1030.
RX 400p Time 11:32:45.2 This item displays the current UTC Time. If a local offset has been specified, the time will reflect your local time instead. See Section 5.15.2 for further details on setting a UTC offset. This information is parsed from the GPZDA NMEA message. Age This item displays the current DGPS age of corrections in seconds. This information is parsed from the GPGGA NMEA message. 5.
RX 400p Precision@ Accessing this menu by pressing the button with this item in focus will provide access to estimated real-time precision values of computed positions. The contents of this menu are described in Section 4.9.1.1. NavCnd@ ABBABB This menu item displays satellite tracking information and is called the navigation condition. Each character following the NavCnd@ prompt is the number of satellites that meet certain criteria.
RX 400p 4.9.1.1 Precision Menu The Precision@ menu provides information relating to the estimated real-time precision of position computations. Please note that these are not absolute accuracy estimates, but only relative measures. This menu is detailed in Figure 4-9. Res rms: 0.3m?A =_a:??????0.2m?^ =_b:??????0.1m Azimuth:163.1! =_Lat:????0.2m? =_Lon:????0.2m =_Alt:????0.3m Back@ Top Menu@ Pressing the and keys allows you to scroll through the available menu items.
RX 400p azimuth:163.1! This menu item indicates the azimuth of the semi-major axis of the horizontal position’s error ellipse. =_Lat: 0.2m This menu item indicates length of the latitude component of the horizontal error ellipse to a confidence of one standard deviation. =_Lon: 0.2m This menu item indicates length of the longitude component of the horizontal error ellipse to a confidence of one standard deviation.
RX 400p =_Alt: 0.3m This menu item indicates height of the altitude component of a 3D error ellipse to a confidence of one standard deviation. Back@ When accessed using the button, this menu item returns the menu system to the previous menu. Top Menu@ When accessed using the button, this menu item returns the menu system to the main menu. 4.9.1.
RX 400p in focus will take the menu system to the previous menu or the Main menu, respectively. Car?Smooth???9?+ This menu item displays the number of satellites currently being tracked that have carrier phase smoothing active. Carrier phase smoothing uses the instantaneous carrier phase to smooth the code measurements to remove measurement noise and improving the consistency and accuracy of the position solution. This feature is automatic in nature.
RX 400p NotUsed?Prev?9 This menu item is the number of satellites that are currently being tracked by the GPS engine, have an ephemeris, are healthy, and are above the elevation mask. Above?Ele????9 This menu item indicates how many satellites are above the current elevation mask setting. An elevation mask is used to ignore satellites that are low on the horizon, but still usable, as they will have more significant tropospheric refraction errors.
RX 400p Back@ When accessed using the button, this menu item returns the menu system to the previous menu. Top Menu@ When accessed using the button, this menu item returns the menu system to the main menu. 4.9.1.3 DSP-ARM Menu The DSP-ARM status menu provides information relating to the status of the internal DSP and ARM processors of the internal SLX receiver of the RX 400p. This menu is detailed in Figure 4-9.
RX 400p Pressing the and keys allows you to scroll through the available menu items. Pressing the button anywhere in this menu will provide a bar chart of signal tracking information. Pressing the button with the Back@ or Top Menu@ item in focus will take the menu system to the previous menu or the Main menu, respectively. DSP:CarLock The DSP:CarLock is a description of the L-band carrier lock. Under normal operation, this field should indicate YES.
RX 400p ARM:DifData This menu item indicates if differential data is being successfully decoded by the GPS receiver. Under normal operation, this field should indicate YES. ARM:ARMLock Under normal operation, this field should indicate YES. ARM:DGPS Under normal operation, this field should indicate YES. ARM:Soution This menu item indicates if the GPS solution is deemed correct by the processor.
RX 400p 4.9.2 GPS Satellites Menu This section of the menu tree provides access to GPS satellite tracking information on a channel-by-channel basis. This menu is detailed in Figure 4-9. CH01_SV23?EL?37+ AZ??092?SNR??45^ ???????. ???????. ???????. CH12_SV09?EL?45+ AZ??183?SNR??47^ Back@ Pressing the and keys allows you to scroll through the available GPS receiver channels, numbered Ch01 through Ch12.
RX 400p CHxx_SVxx This is the receiver channel (0 to 12) and the satellite number being tracked by that channel. This information is parsed from the GPGSV NMEA message. EL xx This is the elevation (0° - horizon to 90°- vertical) of the satellite for the particular receiver channel referenced on the top line of the display. This information is parsed from the GPGSV NMEA message.
RX 400p Top?Menu@ 4.9.3 When accessed using the button, this menu item returns the menu system to the main menu. GPS Configure Menu This menu provides access to various configurable GPS parameters. This portion of the menu system, including submenus, is detailed in Figure 4-9. NMEA Output@???A Elev?Mask@??05! MaxDGPSAge@1800s UTC?Offset@_7hr Back@ Top Menu@ Pressing the and keys allows you to scroll through the available options.
RX 400p Elev?Mask@?? 5! When accessed, this menu allows you to adjust the elevation cutoff mask of the internal GPS receiver, from 0° to 45°, using the and keys, followed by pressing . MaxDGPSAge@1800s When accessed, this menu allows you to adjust the maximum age that the GPS receiver will accept of differential corrections before leaving differential mode and entering standalone mode.
RX 400p 4.9.3.1 NMEA Output Menu This menu allows you to toggle the output of various NMEA messages that are output from the MAIN port of the RX 400p. This menu is detailed in Figure 4-9. The NMEA messages within this menu are described in detail within Chapter 7. GPGGA@?5?Hz GPGGA@?1?Hz GPGLL@?Off GPGSA@?Off GPGST@?Off GPGSV@?1?Hz GPRMC@?1?Hz GPRRE@ Off GPVTG@?5?Hz GPZDA@?Off Bin95@?Off Bin96@ Off RTCM @?On Back@ Top?Menu@ A ^ Pressing the and keys allows you to scroll through the available options.
RX 400p GPGGA@ 1 Hz This menu item allows you to toggle the output of the GPGLL message through the MAIN port of the RX 400p receiver. To change the current update button followed by adjusting the rate, press the or key, then press . This rate using the message may be set for output at 5 Hz, 1 Hz, 5 s updates or may be turned off. GPGSA@ Off This menu item allows you to toggle the output of the GPGSA message through the MAIN port of the RX 400p receiver.
RX 400p GPGST@ Off This menu item allows you to toggle the output of the GPGST message through the MAIN port of the RX 400p receiver. To change the current update button followed by adjusting the rate, press the rate using the or key, then press . This message may be set for output at 1 Hz only. GPGSV@1 Hz This menu item allows you to toggle the output of the GPGSV message through the MAIN port of the RX 400p receiver.
RX 400p GPRRE@ Off This menu item allows you to toggle the output of the GPRRE message through the MAIN port of the RX 400p receiver. To change the current update button followed by adjusting the rate, press the rate using the or key, then press . This message may be set for output at 1 Hz only. GPVTG@ 5 Hz This menu item allows you to toggle the output of the GPVTG message through the MAIN port of the RX 400p receiver.
RX 400p 4.10 Bin96@ Off This menu item allows you to toggle the output of the Binary 96 message (contains raw measurement data) through the MAIN port of the RX 400p receiver. To change the current update rate, press button followed by adjusting the rate using the the or key, then press . This message may be set for output at 5 Hz, 1 Hz, 5 s updates or may be turned off. RTCM @ Off This menu item allows you to toggle the output of the RTCM data through the MAIN port of the RX 400p receiver.
RX 400p Signal Status@ A Configure@ ^ Back@ Top Menu@ Pressing the and keys allows you to scroll through the available options. Pressing the button with any item in focus will take the menu system to that submenu. Pressing the button with the Back@ or Top Menu@ item in focus will take the menu system to the previous menu or the Main menu, respectively. Signal?Status@ A Pressing the button with this menu item in focus will take the menu system to the WAAS signal status menu.
RX 400p BER?122:?? 0?A BER?134:?? 9?^ LN? 122: _54.0! LN? 134: 178.0! Elev122:? 9.8! Elev134:? 5.0! Az? 122: 114.0! Az? 134: 252.6! Back@ Top?Menu@ Pressing the and keys allows you to scroll through the available options. Pressing the button with any status information in focus will display the signal tracking bar chart. Pressing the button with the Back@ or Top Menu@ item in focus will take the menu system to the previous menu or the Main menu, respectively.
RX 400p LN 122: _54.0! This menu item provides the longitude of the PRN 122 AOR-W (Atlantic Ocean Region - West) WAAS satellite. As the satellite is geosynchronous, this value will not change. LN 134: 178.0! This menu item provides the longitude of the PRN 134 POR (Pacific Ocean Region - West) WAAS satellite. As the satellite is geosynchronous, this value will not change. Elev122: 9.
RX 400p Az 134: 252.6! This menu item provides you with the current azimuth, referenced to North, of the PRN 134 POR (Pacific Ocean Region) WAAS satellite. The azimuth value depends on your current latitude and longitude in relation to the satellite’s longitude. If the satellite is directly South of your current location, the satellite will have an azimuth of 180°. Back@ When accessed using the button, this menu item returns the menu system to the previous menu.
RX 400p 4.10.2 WAAS Configure Menu This menu allows you to change from the current WAAS mode to a different DGPS mode. This portion of the menu system is detailed in Figure 4-10. Diff@WAAS < Pressing the and keys allows you to scroll through the differential options. Pressing the button will change to the specified mode. If you do not wish to change from the current differential mode, simply select WAAS and press the button. 4.
RX 400p Signal?Status@ Accessing this submenu by pressing the button with this item in focus allows you to monitor signal status information from the internal OmniSTAR DGPS receiver. Configure@ When in focus, accessing this menu using button allows you to configure the internal OmniSTAR receiver. Back@ When accessed using the button, this menu item returns the menu system to the previous menu. Top?Menu@ When accessed using the button, this menu item returns the menu system to the main menu. 4.11.
RX 400p F 1551489/1200 + BER?001 AA ^ Difstatus@ LN?? _101.0! Elevation?31.6! Azimuth??163.4! Back@ Top?Menu@ Pressing the and keys allows you to scroll through the available options. Pressing the button with any status information in focus will display the signal tracking bar chart. Pressing the button with the Back@ or Top Menu@ item in focus will take the menu system to the previous menu or the Main menu, respectively.
RX 400p Difstatus@ The differential status menu provides an indication of the status of the L-band DGPS receiver. This value is in hexadecimal, however, the submenu that button, when may be accessed by pressing the this item is focus, decodes this into more intuitive information. LN?? This menu item provides the longitude of the currently acquired OmniSTAR DGPS communication satellite. As the satellite is geosynchronous, this value will not change. _101.0! Elevation?xx.
RX 400p Back@ When accessed using the button, this menu item returns the menu system to the previous menu. Top?Menu@ When accessed using the button, this menu item returns the menu system to the main menu. 4.11.1.1 Difstatus Menu This menu provides details on the OmniSTAR differential service. This menu is detailed in Figure 4-11.
RX 400p Region This menu item indicates if the receiver is currently operating within the intended region. If the receiver is operating in the subscribed region, this item will display ‘OK’, otherwise it will display ‘BAD’. Sat?Link This menu item indicates if the OmniSTAR satellite uplink is operating correctly. If the link is operating correctly, this item will display ‘OK’, otherwise it will display ‘BAD’.
RX 400p Remote Site When the RX 400p displays ‘OK’, this menu item indicates that the remote site in use as part of the DGPS correction source is operating correctly. If the site is not operating correctly, the receiver will display ‘BAD’. Almanac This menu item indicates if the almanac provided by the OmniSTAR services has been downloaded successfully. If a valid almanac is present with the RX 400p, it will display ‘OK’, otherwise the receiver will display ‘BAD’.
RX 400p Back@ When accessed using the button, this menu item returns the menu system to the previous menu. Top?Menu@ When accessed using the button, this menu item returns the menu system to the main menu. 4.11.2 OmniSTAR Configure Menu This menu contains two menus related to the selection of the differential source, OmniSTAR receiver tuning, and a facility to monitor the subscription status of the OmniSTAR receiver inside the RX 400p. This menu is detailed in Figure 4-11.
RX 400p F@1551489/1200 ^ When accessed using the button, you will be able to tune the OmniSTAR receiver manually. A screen will confirm that you wish to proceed with the manual tune. If you do, adjust this to read ‘Yes’ button. and press the When prompted to tune the frequency, adjust each character using the and keys, followed by pressing the button to advance the cursor to the next position. Continue unit you have entered the desired frequency.
RX 400p Back@ When accessed using the button, this menu item returns the menu system to the previous menu. Top?Menu@ When accessed using the button, this menu item returns the menu system to the main menu. 4.11.2.1 Subscription Menu When operating the RX 400p with an OmniSTAR subscription, this menu provides information relating to the expiry of the subscription. Additionally, the OmniSTAR unit number is provided in this menu, which is required by OmniSTAR for subscribing to their service.
RX 400p 4.12 SerialNum Disp@ When accessed using the button, this menu will provide you with the OmniSTAR unit number for your RX 400p. OmniSTAR uses this number for subscription purposes. Please have it ready when subscribing your receiver when contacting OmniSTAR. Countdown?Tmr@ When accessed using the button, this menu item will display the time left, if a countdown timer has been subscribed to your receiver.
RX 400p Pressing the and keys allows you to scroll through the available options. Pressing the button with any item in focus will take the menu system to that submenu. Pressing the button with the Back@ or Top Menu@ item in focus will take the menu system to the previous menu or the Main menu, respectively. Signal?Status@ Using the button, this menu item allows you to access a menu that provides Signal Status information from the internal beacon DGPS receiver.
RX 400p 4.12.1 Beacon Signal Status Menu This section of the menu tree provides access to information related to the status of the beacon receiver primary channel. This submenu is detailed in Figure 4-12. F? Auto/Auto AA$ SS 54?SNR?26? ^ MTP?100>?Q?25? Unselected?Bx ID?0001??H?01 Back@ Top?Menu@ Pressing the and keys allows you to scroll through the available options. Pressing the button with any status information in focus will display the signal tracking bar chart.
RX 400p floor, measured in decibels (dB). This value effectively describes the reception quality, as a signal is ‘louder’ if it is higher above the noise floor. Interpretation of the SNR reading is discussed further in Section 2.4.2. MTP?100>?Q?25? The menu item provides an indication of the amount of successfully decoded differential data. Two figures are provided – message throughput (MTP) and quality (Q). If reception is strong, all data will be decoded, providing a 100% MTP.
RX 400p ID?0001??H?01 This menu item displays the identification number of the reference Station as contained within the RTCM header words of the correction data. Usually, beacon sites have redundant base stations, so it the number displayed will be one of two that identify the beacon. The identification number that is being transmitted will identify which base station is currently transmitting correction data.
RX 400p Table 4-1 Beacon Health Status Values Health Code 0-5 6 7 4.12.2 Indication Reference Station Transmission Broadcast – Monitored Reference Station Transmission Broadcast – Unmonitored Reference Station Not Working Beacon Configure Menu This menu provides access to the various methods to tune the internal SBX beacon sensor inside the RX 400p. This submenu is detailed in Figure 4-12.
RX 400p When using an external source, be sure that it is providing RTCM SC-104 compliant data and not a proprietary binary format. Tune@Auto Auto When accessed using the button, this menu item allows you to manually tune the beacon receiver using the or key. When manually selecting a tuning frequency, you will need to specify the MSK modulation rate. You may choose 100 bps, 200 bps, or automatic MSK rate detection.
RX 400p Top?Menu@ When accessed using the button, this menu item returns the menu system to the main menu. 4.12.2.1 TuneBeaconName Menu This menu allows you to tune the beacon receiver inside the RX 400p by selecting the desired station from a global list. When this menu item is accessed using the button, the menu allows you to choose the beacon from a list by continent, country, and finally by beacon name.
RX 400p Pressing the and keys allows you to scroll through the available options. Pressing the button with any status information (items without the menu access indicator, @) in focus will display the signal tracking bar chart. Pressing the button on any item in focus with the menu access indicator will take the menu system button with the Back@ or Top Menu@ item in to that submenu. Pressing the focus will take the menu system to the previous menu or the Main menu, respectively.
RX 400p Top?Menu@ 4.14 When accessed using the button, this menu item returns the menu system to the main menu. Autonomous Menu This menu displays the current mode of operation and a menu item to change the current DGPS mode. This submenu is detailed in Figure 4-14. No Diff Source @ Diff@Autonomous^ Back@ Top Menu@ Pressing the and keys allows you to scroll through the available options.
RX 400p 4.15 Diff@Autonomous^ Accessing this menu item using the button allows you to choose the source of differential corrections. Correction source options include the WAAS demodulator, internal OmniSTAR receiver, the internal beacon receiver, the use of external corrections, or autonomous operation. Autonomous operation uses no differential corrections. Back@ When accessed using the button, this menu item returns the menu system to the previous menu.
RX 400p Display Apps@ A When accessed using the button, this menu item will display the current application in use and the other application not in use. The current applications present for the SLX are WAAS and OmniSTAR. Both the WAAS and OmniSTAR applications support Beacon DGPS mode, external RTCM input, or autonomous operation. It does not matter if which of OmniSTAR or WAAS is currently in use when choosing to use one of the other DGPS modes.
RX 400p Baud Rates@ When accessed using the button, this menu will provide access to the baud rates submenu where the speed of the external MAIN and AUX ports may be changed. Software Disp@ When accessed using the button, this menu will provide access to a submenu that allows you to query the RX 400p for each version of firmware. Back@ When accessed using the button, this menu item returns the menu system to the previous menu.
RX 400p DispUpdate@5 HzA LL Unit@DM.M Hgt Unit@meters Vel Unit@km/h Back@ Top Menu@ Pressing the and keys allows you to scroll through the available options. Pressing the button with any item in focus will take the menu system to that submenu. Pressing the button with the Back@ or Top Menu@ item in focus will take the menu system to the previous menu or the Main menu, respectively.
RX 400p Hgt Unit@meters Accessing this menu using the button allows you to adjust the height units used to display the antenna altitude. Two formats are available: meters and feet. Vel Unit@km/h Accessing this menu using the button allows you to adjust the velocity units used to display the speed of the antenna. Three formats are available: km/h, mph, and knots. Back@ When accessed using the button, this menu item returns the menu system to the previous menu.
RX 400p NMEA I/O@ 9600 A Accessing this using the button allows you to adjust the baud rate of the external MAIN port, referred to as the NMEA I/O port within the menu system due to its primary functionality. Available baud rates are 4800, 9600, and 19200. RTCM In @ 9600 ^ Accessing this using the button allows you to adjust the baud rate of the external AUX port, referred to as the RTCM In port within the menu system due to its primary functionality. Available baud rates are 4800, 9600, and 19200.
RX 400p Pressing the and keys allows you to scroll through the available options. Pressing the button with any item in focus will take the menu system to that submenu. Pressing the button with the B Back@ or Top Menu@ item in focus will take the menu system to the previous menu or the Main menu, respectively. 4.16 Menu System@ A Accessing this menu item using the button will display the version of firmware for the menu system.
RX 400p 4.16.1 Changing the Source of DGPS Corrections To change the source of corrections used by the internal GPS sensor within the RX 400p receiver: Using the and press Press or key, move the DGPS menu, located in the root menu, into focus . For example, when in WAAS mode, this menu will be called WAAS@. to move the Configure@ menu item in focus and press . If required, press to move the Diff@ menu item into focus and press .
RX 400p Depending on which baud rate you with to change, Use the either the DATA?1@ or DATA?2@ menu into focus and press Scroll with the 4.16.4 or or key to move . keys to the required baud rate and press . Monitoring the OmniSTAR Subscription Status When in OmniSTAR DGPS mode, to view the subscription status of the OmniSTAR engine inside the RX 400p receiver: Using the or key, move the OmniSTAR@ menu, located in the root menu, into focus and press Using the Use the or or .
RX 400p 4.16.5.2 Select a Beacon By Name To tune to a specific beacon by name: Using the or key, move the Beacon@ menu, located in the root menu, into . focus and press Using the or key, move the Configure@ menu into focus and press . Using the or key, move the TuneBeaconName@ menu into focus and press .
RX 400p The first method erases any previous search information and performs a new Global Search. The second method will resume from where the last automatic search algorithm left off. 4.17 Firmware Updates Please contact MID-TECH Customer Service for the latest firmware update for your RX 400p receiver. Firmware releases include a Field Upgrade Program, installation instructions, and release notes.
RX 400p 5 Configuration Wizard The Configuration Wizard is an easy, efficient way of configuring your receiver. Using the Wizard, you may configure your receiver in just a few keystrokes by selecting from a list of previously saved configurations. The Configuration Wizard is composed of two main parts - a step-by-step process of configuration, plus the ability to store a new configuration in one of five memory locations for future use.
RX 400p GPS@???????????A WAAS@ ? ^ Config Wizard@ System Setup@ Use prev saved Yes < congifs\ No ENTER ENTER ENTER No Configuration Wizard @My Config @Not Used 2 @Not Used 3 @Not Used 4 @Not Used 5 Return@ Exit Wizard@ Choose the DGPS Source...
RX 400p 5.1 Start-up Sequence When you turn the RX 400p on, it will sequence through a startup screen followed by a prompt asking if you’d like to use the Configuration Wizard. To access the button within the 3-second timeout period. Configuration Wizard, press the Once the menu system enters into the Configuration Wizard mode, the following prompts will be presented, starting with the more important settings followed by settings of decreasing importance.
RX 400p When choosing ‘Yes’, the menu system will display the five memory locations and allow you to choose one configuration, or exit the Wizard with no changes to the current configuration. 5.4 Bypassing a Configuration Step The Wizard process prompts you for each step by asking if you wish to configure the specific parameter mentioned. You may choose ‘No’ and go on to the next step, thus bypassing the current step.
RX 400p If you wish to save the configuration, simply move the memory location to which you would like to save it, into focus and press the button. You will then be prompted to enter in each alpha-numeric character of the new configuration’s name. The name may be up to 14-characters long. Simply adjust the current character using or button, followed by pressing the button. The character choices are the alphanumeric, including only capitalized letters. You do not need to enter all 14 characters.
RX 400p 6 NMEA 0183 Messages This chapter identifies the selection of valid NMEA 0183 output messages for the RX 400p receiver. 6.1 Description of NMEA 0183 NMEA 0183 is a communications standard established by the marine industry. It has found use in a variety of electronic devices, including GPS and beacon receivers. The National Marine Electronics Association publishes updates to the NMEA 0183 message standard.
RX 400p Table 6-1 NMEA Message Elements Element $ XX YYY zzz Description Message header character NMEA Talker field. GP indicates a GPS talker Type of GPS NMEA Message Variable Length Message Fields Carriage Return Line Feed Null, or empty fields occur when no information is available for that field. 6.3 RX 400p Serial Port Configuration The RX 400p may be configured using a selection of NMEA commands, however, these commands are beyond the scope of this document.
RX 400p 6.5 GPS NMEA Data Messages The following subsections describe the data messages listed in Table 6-2 in detail. Table 6-2 GPS NMEA Messages 6.5.
RX 400p Table 6-3 GGA Data Message Defined Field hhmmss.ss ddmm.mmmmm s dddmm.mmmmm s n qq pp.p saaaa.aa M ±xxxx.xx M sss aaa *cc 6.5.
RX 400p Table 6-4 GLL Data Message Defined Field ddmm.mmmmm s dddmm.mmmmm s hhmmss.ss s *cc 6.5.
RX 400p 6.5.4 GST Data Message The GST message contains Global Navigation Satellite System (GNSS) psuedorange error statistics. Table 6-6, breaks down the GST message into its components. This message has the following format: $GPGST,hhmmss.ss,a.a,b.b,c.c,d.d,e.e,f.f,g.g *cc Table 6-6 GST Data Message Defined Field hhmmss.ss a.a b.b c.c d.d e.e f.f g.g *cc 6.5.
RX 400p Table 6-7 GSV Data Message Defined Field t m n ii ee aaa ss *cc 6.5.6 Description Total number of messages Message number, m = 1 to 3 Total number of satellites in view Satellite number Elevation in degrees, ee = 0 to 90 Azimuth (true) in degrees, aaa = 0 to 359 SNR (dB), ss = 0 to 99 Checksum Carriage return and line feed RMC Data Message The RMC message contains recommended minimum specific GPS data. Table 6-8 breaks down the RMC data message into its components.
RX 400p Table 6-8 RMC Data Message Defined Field hhmmss.ss a ddmm.mmmmm n dddmm.mmmmm w z.z y.y ddmmyy d.d v *cc 6.5.
RX 400p 6.5.8 VTG Data Message The VTG message contains velocity and course information. Table 6-10 breaks down the VTG data message into its components. This message has the following format: $GPVTG,ttt,c,ttt,c,ggg.gg,u,ggg,gg,u*cc Table 6-10 VTG Data Message Defined Field ttt c ttt c ggg.gg u ggg.gg u *cc 6.5.
RX 400p Table 6-11 ZDA Data Message Defined Field hh mmss.
RX 400p 7 Troubleshooting Use the following checklist to troubleshoot erroneous RX 400p receiver operation. Table 7-1 provides a problem symptom, followed by a list of possible solutions. Table 7-1 Troubleshooting Symptom Possible Solution Receiver fails to power • • • • • No data from RX 400p • • • • Random data from RX 400p • • • • No GPS lock No WAAS lock No OmniSTAR lock • • • • • • • • • • • Verify polarity of power leads Check 1.
RX 400p No Beacon lock • • • • No DGPS position in external RTCM mode • • Low beacon SNR Non-differential GPS output 98-05044 R1 • • • • • Check antenna connections Verify MSK rate is set correctly or choose Auto MSK rate (100 200, or Auto) Verify frequency of transmitting beacon, or choose Auto?Tune@ Verify RX 400p antenna port output voltage (5 VDC) Verify that the baud rate of the RTCM In (AUX) port matches the baud rate of the external source Verify the pin-out between the RTCM source and the AU
RX 400p 8 Appendix A - Specifications This appendix provides the operational, mechanical, electrical, physical, and environmental specifications for the RX 400p receiver and CDA-2B antenna. Table A-1 RX 400p Specifications Item Internal GPS Engine Operational Specifications Specification Frequency Channels Horizontal Accuracy Max Position Update Rate Item Internal OmniSTAR Engine Operational Specifications Specification Frequency Frequency Tuning Modes Item 1.575 GHz 12 parallel tracking < 1.
RX 400p Item Serial Interface Specifications Specification Serial Port Interface Level MAIN Connector AUX Connector MAIN Baud Rate AUX Baud Rate MAIN Output Protocol MAIN Input Protocol AUX Input Protocol Item RS-232C DB9 Socket DB9 Socket 4800, 9600, or 19200 Baud 4800, 9600, or 19200 Baud NMEA 0183 NMEA 0183 RTCM SC-104 (Extrnl mode only) Power Specifications Specification Input Voltage Power Consumption with CDA-2B Power Connector Item 9.2-48 VDC <6.
RX 400p Item Input Voltage Input Current Item Enclosure Mounting Thread Diameter Height Weight Antenna Connector Antenna Extension Cable Power Specifications Specification 3.6-15 VDC Supplied by Receiver 50-60 mA Mechanical Characteristics Specification Aluminum Base, Polycarbonate Top 1-14-UNS-2B 129 mm (5.08”) 98 mm (3.85”) 456 g (1.0 lb.
RX 400p 9 Appendix B - Interface This appendix provides information on interfacing the various aspects of your RX 400p receiver. The main purpose of the RX 400p receiver is to provide differentially corrected position and position-related information in the standard NMEA format. In addition to the RX 400p operating as a positioning sensor, you may also have a use for the correction data received by the internal WAAS, OmniSTAR, or beacon.
RX 400p M A IN ExternalD evice 5 GND 3 RX 2 TX GND NMEA NMEA TX RX Figure B-1 GPS Data Interface Note - For successful communications, the baud rate of the RX 400p MAIN port must be set to match that of the data logging or monitoring device. Additionally, you must interface the RX 400p to an RS-232C serial port of the external device. Refer to Section 4.15.3 for instructions related to setting the RX 400p baud rate. 9.
RX 400p Figure B-2 illustrates the required interface between the RX 400p and a separate GPS receiver: M A IN Separate G PS R eceiver 5 GND 2 TX GND RTCM RX Figure B-2 RTCM Data Interface Note - For successful communications, the baud rate of the RX 400p MAIN port must be set to match that of the separate GPS receiver. Additionally, you must interface the RX 400p to an RS-232C serial port of the separate GPS receiver. Refer to Section 4.15.3 for instructions related to setting the RX 400p baud rate.
RX 400p Figure B-3 illustrates the required interface between the RX 400p and an external GPS receiver: AU X ExternalC orrection Source 5 GND 3 RX GND RTCM TX Figure B-3 External Correction Source Interface Note - For successful communications, the baud rate of the RX 400p AUX port must be set to match that of the external correction source. Additionally, you must interface the RX 400p to an RS-232C serial port of the external source. Refer to Section 4.15.
RX 400p 10 Appendix C - Activating the OmniSTAR DGPS Service 10.1 L-band Receiver Unit Number To use the OmniSTAR service, your receiver must be operating in OmniSTAR mode with a valid subscription. In order to subscribe your RX 400p receiver’s internal OmniSTAR sensor, you must know its unit number.
RX 400p 10.2 OmniSTAR Service Activation You may activate the OmniSTAR DGPS service for your RX 400p receiver by contacting the service provider in your region. Contact OmniSTAR with your unit number and they will activate your subscription over the air. Please be ready to have your receiver ready to receive the OmniSTAR signal for subscription validation. If you have questions regarding the OmniSTAR service, please contact OmniSTAR for further information. Contact information is provided in Table C-1.
RX 400p Figure C-1 OmniSTAR Coverage Map Table C-1 OmniSTAR Contact Information Location Telephone Numbers Fax Numbers North America Europe and North Africa +1-888-883-8476 +31-70-311-1151 +1-713-780-9408 +31-71-581-4719 Asia, Australia, New Zealand, and South Africa +61-89-322-5295 +61-8-9322-4164 Central America and South America +1-713-785-5850 +1-713-780-9408 You may visit OmniSTAR’s Web site at the following address for further information. www.omnistar.
RX 400p 10.3 Over-Air Subscription Activation OmniSTAR will activate the subscription within your RX 400p receiver over the air. The OmniSTAR L-band DGPS receiver inside your RX 400p will automatically lock onto the OmniSTAR service even if your subscription has not yet been activated. This allows OmniSTAR to activate your subscription over the air. When you have powered the receiver, you must have the antenna in a location with an unobstructed view of the sky.
RX 400p 11 Appendix D - Beacon Information You can find an accurate listing of DGPS radiobeacons worldwide on the Internet at: www.csi-wireless.
RX 400p Further Reading National Marine Electronics Association, National Marine Electronics Association (NMEA 0183) Standard for Interfacing Marine Electronic Devices, Version 2.1, October 15, NMEA 1995, PO Box 50040, Mobile Alabama, 36605 USA Radio Technical Commission for Maritime Services, RTCM Recommended Standards for Differential NAVSTAR GPS Service, Version 2.2, Developed by Special Committee No.
RX 400p 12 Index $ $GPGGA, 6-3 $GPGLL, 6-4 $GPGSA, 6-5 $GPGST, 6-6 $GPGSV, 6-6 $GPRMC, 6-7 $GPRRE, 6-8 $GPVTG, 6-9 $GPZDA, 6-9 A Antenna Mounting Magnetic Mount, 1-8, 1-11 Surface Mount, 1-9 Survey Adapter, 1-11 Automatic Beacon Search (ABS), 4-77 AUX Baud Rate, 4-68, 4-70, 4-71, 4-72, 4-73, 474, 8-2, 9-3, 9-4 Connecting to External Devices, 1-5 Connector Type, 8-2 External RTCM Source, 9-3 Input Protocol, 8-2 Serial Port Defaults, 2-8 B Background Search (beacon), 2-6 Bar Chart Beacon Mode, 4-13 Externa
RX 400p Autonomous Mode Icon, 4-6 Autonomous@ Menu, 4-66 Baud?Rates@ Menu, 4-71 Beacon Configure@ Menu, 4-62 Beacon Lock Icon, 4-5 Beacon Signal?Status@ Menu, 4-58 Beacon@ Menu, 4-56 Configure@ Menu, 4-33 Difstatus@ Menu, 4-49 Display Apps@ Menu, 4-69 Display Format@ Menu, 4-69 DSP_ARM@ Menu, 4-28 External DGPS Source Icon, 4-5 Externl RTCM@ Menu, 4-64 GPS Position Fix Icon, 4-3 GPS@ Menu, 4-16 Menu Access Icon, 4-2 NavCnd@ Menu, 4-25 NMEA?Output@ Menu, 4-35 OmniSTAR Configure@ Menu, 4-52 OmniSTAR Lock Icon
RX 400p N NAD-83), 4-19, 4-20 NMEA 0183, 6-1 NMEA 0183 messages, 6-1 NMEA Data Message $GPGGA, 6-3 $GPGLL, 6-4 $GPGSA, 6-5 $GPGST, 6-6 $GPGSV, 6-6 $GPRMC, 6-7 $GPRRE, 6-8 $GPVTG, 6-9 $GPZDA, 6-9 O OmniSTAR Bit Error Rate, 2-4 Receiver Performance, 2-4 OmniSTAR DGPS Service, 10-2 OmniSTAR Subscription, 10-2, 10-4 P S Signal Bar Chart Autonomous Mode, 4-14 Beacon Mode, 4-13 External RTCM Input, 4-13 OmniSTAR Mode, 4-12 WAAS Mode, 4-12 Signal to Noise Ratio (SNR), 2-6 Survey Adapter, 1-11 SV Count, 4-27 T
