Trimble 48480-SNB900 Trimble® SNB900 Radio Modem User Manual Trimble SNB900 Radio Modem User Guide

Trimble Navigation Ltd Trimble® SNB900 Radio Modem Trimble SNB900 Radio Modem User Guide

Manual revised

Version 1.0Revision AJuly 2004 Trimble® SNB900Radio ModemUser Guide
Contact InformationTrimble Geomatics and Engineering Division5475 Kellenburger RoadDayton, Ohio 45424-1099USA800-538-7800 (toll free in USA)+1-937-233-8921 Phone+1-937-233-9004 Faxwww.trimble.comCopyright and Trademarks© 2004, Trimble Navigation Limited. All rights reserved.Trimble and the Globe & Triangle logo are trademarks of Trimble Navigation Limited, registered in the United States Patent and Trademark Office and other countries. CMR, CMR+, SiteNet, and MS750 are trademarks of Trimble Navigation Limited.Microsoft, Windows, and Windows NT are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.All other trademarks are the property of their respective owners.Release NoticeThis is the July 2004 release (Revision A) of the SNB900 User Guide. It applies to version 1.0 of the Trimble SNB900 radio modem.The following limited warranties give you specific legal rights. You may have others, which vary from state/jurisdiction to state/jurisdiction.Hardware Limited WarrantyTrimble Navigation Limited warrants that this hardware product (the “Product”) will perform substantially in accordance with published specifications and be substantially free of defects in material and workmanship for a period of one (1) year starting from the date of delivery. The warranty set forth in this paragraph shall not apply to software products.Software License, Limited WarrantyThis Trimble software product, whether provided as a stand-alone computer software product, built into hardware circuitry as firmware, embedded in flash memory, or stored on magnetic or other media, (the “Software”) is licensed and not sold, and its use is governed by the terms of the relevant End User License Agreement (“EULA”) included with the Software. In the absence of a separate EULA included with the Software providing different limited warranty terms, exclusions and limitations, the following terms and conditions shall apply. Trimble warrants that this Trimble Software product will substantially conform to Trimble’s applicable published specifications for the Software for a period of one (1) year, starting from the date of delivery.Warranty RemediesTrimble's sole liability and your exclusive remedy under the warranties set forth above shall be, at Trimble’s option, to repair or replace any Product or Software that fails to conform to such warranty ("Nonconforming Product") or refund the purchase price paid by you for any such Nonconforming Product, upon your return of any Nonconforming Product to Trimble in accordance with Trimble’s standard return material authorization procedures. Warranty Exclusions and DisclaimerThese warranties shall be applied only in the event and to the extent that (i) the Products and Software are properly and correctly installed, configured, interfaced, maintained, stored, and operated in accordance with Trimble's relevant operator's manual and specifications, and; (ii) the Products and Software are not modified or misused. The preceding warranties shall not apply to, and Trimble shall not be responsible for defects or performance problems resulting from (i) the combination or utilization of the Product or Software with hardware or software products, information, data, systems, interfaces or devices not made, supplied or specified by Trimble; (ii) the operation of the Product or Software under any specification other than, or in addition to, Trimble's standard specifications for its products; (iii) the unauthorized, installation, modification, or use of the Product or Software; (iv) damage caused by accident, lightning or other electrical discharge, fresh or salt water immersion or spray; or (v) normal wear and tear on consumable parts (e.g., batteries). Trimble does not warrant or guarantee the results obtained through the use of the Product.THE WARRANTIES ABOVE STATE TRIMBLE'S ENTIRE LIABILITY, AND YOUR EXCLUSIVE REMEDIES, RELATING TO PERFORMANCE OF THE PRODUCTS AND SOFTWARE. EXCEPT AS OTHERWISE EXPRESSLY PROVIDED HEREIN, THE PRODUCTS, SOFTWARE, AND ACCOMPANYING DOCUMENTATION AND MATERIALS ARE PROVIDED “AS-IS” AND WITHOUT EXPRESS OR IMPLIED WARRANTY OF ANY KIND BY EITHER TRIMBLE NAVIGATION LIMITED OR ANYONE WHO HAS BEEN INVOLVED IN ITS CREATION, PRODUCTION, INSTALLATION, OR DISTRIBUTION INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NONINFRINGEMENT. THE STATED EXPRESS WARRANTIES ARE IN LIEU OF ALL OBLIGATIONS OR LIABILITIES ON THE PART OF TRIMBLE ARISING OUT OF, OR IN CONNECTION WITH, ANY PRODUCTS OR SOFTWARE. SOME STATES AND JURISDICTIONS DO NOT ALLOW LIMITATIONS ON DURATION OR THE EXCLUSION OF AN IMPLIED WARRANTY, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
TRIMBLE NAVIGATION LIMITED IS NOT RESPONSIBLE FOR THE OPERATION OR FAILURE OF OPERATION OF GPS SATELLITES OR THE AVAILABILITY OF GPS SATELLITE SIGNALS.Limitation of LiabilityTRIMBLE’S ENTIRE LIABILITY UNDER ANY PROVISION HEREIN SHALL BE LIMITED TO THE AMOUNT PAID BY YOU FOR THE PRODUCT OR SOFTWARE LICENSE. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL TRIMBLE OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES WHATSOEVER UNDER ANY CIRCUMSTANCE OR LEGAL THEORY RELATING IN ANY WAY TO THE PRODUCTS, SOFTWARE AND ACCOMPANYING DOCUMENTATION AND MATERIALS, (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR ANY OTHER PECUNIARY LOSS), REGARDLESS WHETHER TRIMBLE HAS BEEN ADVISED OF THE POSSIBILITY OF ANY SUCH LOSS AND REGARDLESS OF THE COURSE OF DEALING WHICH DEVELOPS OR HAS DEVELOPED BETWEEN YOU AND TRIMBLE. BECAUSE SOME STATES AND JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE LIMITATION MAY NOT APPLY TO YOU.NOTE: THE ABOVE LIMITED WARRANTY PROVISIONS MAY NOT APPLY TO PRODUCTS OR SOFTWARE PURCHASED IN THE EUROPEAN UNION. PLEASE CONTACT YOUR TRIMBLE DEALER FOR APPLICABLE WARRANTY INFORMATION.NoticesClass B Statement – Notice to Users. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules, and Part 90 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communication. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:– Reorient or relocate the receiving antenna.– Increase the separation between the equipment and the receiver.– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.– Consult the dealer or an experienced radio/TV technician for help.Changes and modifications not expressly approved by the manufacturer or registrant of this equipment can void your authority to operate this equipment under Federal CommunicationsPrior to operating these radio modems, users are legally required to obtain frequency licenses, as required by the country-of-use. Please contact your local communications governing agency for the licensing requirements for each of these radio modems.SafetyYou must maintain a minimum separation distance of 21 cm (approximately 8 in) between yourself and the radiating antenna for this device to satisfy the RF Exposure requirements of the FCC and Industry Canada. The antenna may not be co-located with any other transmitting device. For mobile operation, the maximum gain of the antenna must not exceed 5 dBi.
Declaration of Conformity (Canada)Company name Trimble Navigation LimitedCompany number 1756Company address Trimble Geomatics and Engineering Division5475 Kellenburger RoadDayton, Ohio 45424-1099USA800-538-7800 (toll free in USA)+1-937-233-8921 Phone+1-937-233-9004 Fax Model number SNB900Approval dateSpecification code 17561031902A3 17Specification RSS210Issue 3Band 650KG1DPower 740mFrom frequency 902MTo frequency 928M
SNB900 Radio Modem User Guide vContents1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Your Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Use and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Equipment Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8SNB900 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Power and I/O cables. . . . . . . . . . . . . . . . . . . . . . . . . 10Default settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Configuration and Installation . . . . . . . . . . . . . . . 11Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Configuring the serial I/O port . . . . . . . . . . . . . . . . . . . . 12Connecting to an office computer . . . . . . . . . . . . . . . . . . 13Getting started with WinFlash . . . . . . . . . . . . . . . . . . . . 13Firmware updates . . . . . . . . . . . . . . . . . . . . . . . . . . 16Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Installing an SNB900 as a base . . . . . . . . . . . . . . . . . . . 17Installing an SNB900 as a repeater . . . . . . . . . . . . . . . . . 18
Contentsvi SNB900 Radio Modem User GuideInstalling antennas . . . . . . . . . . . . . . . . . . . . . . . . . . 194 Characteristics and Specifications . . . . . . . . . . . . . 21Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Antenna Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Omni-directional antennas . . . . . . . . . . . . . . . . . . . . . . 225 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 25Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
CHAPTER1SNB900 Radio Modem User Guide 1Introduction 1In this chapter:QWelcomeQRelated InformationQTechnical AssistanceQYour Comments
1 Introduction2 SNB900 Radio Modem User Guide1.1 WelcomeThis manual describes how to set up and use a Trimble® SNB 900 radio modem.Even if you have used other Global Positioning System (GPS) products before, Trimble recommends that you spend some time reading this manual to learn about the special features of this product. If you are not familiar with GPS, visit the Trimble website (www.trimble.com) for an interactive look at Trimble and GPS.This manual assumes that you know how to use your current Microsoft® Windows® operating system.1.2 Related InformationSources of related information include the following:• Release notesRelease notes describe new features of the product, information not included in the manuals, and any changes to the manuals. They are provided as a .pdf file on the CD and installed in the program directory (typically C:\Program Files\Trimble\<Folder>) when you install the software. • Update notesThere is a warranty activation sheet with this product. Send it in to automatically receive update notes containing important information about software and hardware changes. Contact your local Trimble dealer for more information about the support agreement contracts for software and firmware, and an extended warranty program for hardware.• Trimble training coursesConsider a training course to help you use this GPS system to its fullest potential. For more information, go to the Trimble website at www.trimble.com/training.html.
SNB900 Radio Modem User Guide 3Introduction 11.3 Technical AssistanceIf you have a problem and cannot find the information you need in the product documentation, contact your local dealer. Alternatively, do one of the following:• Request technical support using the Trimble website at www.trimble.com/support.html• Send an e-mail to trimble_support@trimble.com1.4 Your CommentsYour feedback about the supporting documentation helps us to improve it with each revision. Send an e-mail with your comments to ReaderFeedback@trimble.com.
1 Introduction4 SNB900 Radio Modem User Guide
CHAPTER2SNB900 Radio Modem User Guide 5 Overview 2In this chapter:QIntroductionQFeaturesQUse and CareQEquipment SetsQOptional AccessoriesQSNB900 Description
2 Overview6 SNB900 Radio Modem User Guide2.1 IntroductionThe rugged Trimble® SNB900 radio modem is ideal for harsh environments, such as those associated with construction, seismic, and mining surveys. It is convenient and versatile: When used with a Trimble rover GPS receiver that has an internal radio modem, the SNB900 can be used to establish a robust wireless data broadcast network for real-time differential and real-time kinematic GPS applications.2.2 FeaturesThe SNB900 has the following standard features:•900MHz ISM• +30 dBm• 902–928 MHz frequency hopping on 50 channels (USA)• High-speed wireless data rate• Interfaces with Trimble survey-grade GPS receivers• Supports up to two repeaters in a single network, three if an access point is used• Rugged, weatherproof construction• Two-line, 16-character VFD display• Compatible with Trimble CMR+™ and RTCM SC-104• Operational parameters configured using the WinFlash utility, a handheld controller, or the front panel• Can be configured as a base, repeater, or rover• Compatible with SNR900 and SiteNet™ 900 external radios, and Trimble 5700 and 5800 internal radios• When connected to a Trimble Network Router (TNR) provides two-way IP connectivity to machine grade control systems.
SNB900 Radio Modem User Guide 7Overview 2Note – In this manual, CMR™ and CMR+ formats are both represented by CMR+.2.3 Use and CareThe SNB900 is configured as a base or rover, and can be connected to most Trimble survey-grade GPS receivers through a single serial I/O cable and power cable. When used as a repeater, the SNB900 operates autonomously and requires only a power and antenna connection, with no connection to the serial port.To achieve line-of-sight (LOS) coverage to all points in a survey area, an SNB900 radio modem network can include up to two repeaters, depending on data format and output data rate. The rovers use the data packet from the base or repeater, whichever the rover receives first.The radio modem is designed to withstand rough treatment typical of equipment used in the field. However, it is a precision electronic instrument and should be treated with reasonable care. It operates at temperatures from –40 °C to +65 °C (–40 °F to 149 °F). The casing is sealed and weatherproof.CCaution – Operating or storing the SNB900 outside the specified temperature range can damage the instrument.2.4 Equipment SetsThe SNB900 is supplied as a stand-alone product, but additional parts are available. For example, additional parts enable you to connect the SNB900 to a Trimble MS750™, 5700, 5800, R7, or R8 GPS receiver.
2 Overview8 SNB900 Radio Modem User Guide2.5 Optional AccessoriesThe following accessories can be purchased in addition to the standard system:• 18 Ah battery with carry pouch (P/N 44103-18)• Battery charger, 18 Ah (P/N 44111-00)• 6 Ah battery with carry pouch and charger (P/N 34106-00)• 10 Ah battery with carry pouch and charger (P/N 34107-00)2.6 SNB900 DescriptionThe SNB900 is packaged in a weatherproof housing. The front panel has a VFD display for network frequency, radio status, and error messages. See Figure 2.1.Figure 2.1 SNB900 front panelThe following main menus are available through the front panel:• NETWORK – Network number• MODE – Base, Repeater, or Rover modes• DATA PORT CONFIG – Data port baud rate settings• DEVICE STATUS – Radio programming information
SNB900 Radio Modem User Guide 9Overview 2When you start the radio modem, the Network menu opens automatically. Use the front panel control keys to select these additional menus:• NEXT – Browse though the menu screens• UP / DOWN – Scroll through items within the menusTable 2.1 describes the main menu items and the selections they provide. Certain items displayed on the front panel will differ according to your units settings.Figure 2.2 shows the three electrical connectors on the rear panel:• ANTENNA connector (reverse polarity female TNC)• Power/Data connector (26-pin D Sub connector)• Power/Data connector (seven-pin LEMO, 0-shell)Figure 2.2 SNB900 rear panelTable 2.1 SNB900 menu hierarchyMain menuMenu selectionNetwork (up to 4 networks)Mode Base w/No RptBase w/One RptBase w/Two RptRepeater 1 Repeater 2 RoverData Port Config38400 8–none–138400 8–odd–19600 8–none–19600 8–odd–1576008–none–1
2 Overview10 SNB900 Radio Modem User Guide26.1 Power and I/O cablesThe SNB900 base equipment set comes with:• Radio-to-receiver I/O cable• Antenna cable with antenna mount•Power supply• Configuration cable, office computer to radio modem (this enables you to use WinFlash to modify the SNB900 configuration)When configured as a base, the radio modem receives data at the DATA connector through the Lemo-to-Lemo cable that plugs into a Trimble GPS receiver, or using the 26-pin cable. When the unit is configured as a repeater, data connection is not required.Power is connected to the unit at the POWER connector from a suitable power source, either a stable DC power supply or a battery.26.2 Default settingsThe SNB900 radio modem is shipped from the factory with the following default settings:• NETWORK – Network 1• MODE – Base with No Repeater• DATA PORT CONFIG – 38400 8–None–1
CHAPTER3SNB900 Radio Modem User Guide 11Configuration and Installation 3In this chapter:QIntroductionQConfigurationQInstallation
3 Configuration and Installation12 SNB900 Radio Modem User Guide3.1 IntroductionThe SNB900 contains both a data modem and a radio. It can be used in a variety of configurations to form a complete wireless data network.For example, you can configure the SNB900 to operate as:• a base radio modem, broadcasting directly to a Trimble MS750, 5700, 5800, R7, or R8 rover GPS receiver that contains an internal radio modem• a repeater• an access point3.2 ConfigurationFor a list of the settings that an SNB900 arrives with, see Default settings, page 10. The default settings are stored in nonvolatile memory and serve as the initial settings each time you start the radio modem. Use WinFlash to reconfigure the settings as often as necessary. You can also use the front panel menus to change some of them.32.1 Configuring the serial I/O portTo use WinFlash, connect the radio modem to a computer that is running a Microsoft Windows 95, 98, Me, Windows NT® 4.0 or later, Windows 2000, or Windows XP operating system.Connect the SNB900 to the computer, install WinFlash, and configure the serial I/O settings as described in the following sections. Alternatively, configure the serial port communication settings from the front panel, using the Data Port Config menu.Note – The office computer must support a 38400 bps serial port data rate.
SNB900 Radio Modem User Guide 13Configuration and Installation 332.2 Connecting to an office computer1. Connect the SNB900 adaptor from the I/O port to a serial COM port on the computer.2. Connect the power cable from the POWER connector to a suitable power source.30.1 Getting started with WinFlashTo configure the SNB900, run the WinFlash communications setup utility on an office computer. A Microsoft Windows 95, 98, Me, Windows NT 4.0 or later, Windows 2000, or Windows XP operating system is required.Installing WinFlashPlease refer to the release notes on the SNB900 CD.Using WinFlash1. Click the WinFlash icon on the office computer desktop. The Device Configuration dialog appears:
3 Configuration and Installation14 SNB900 Radio Modem User Guide2. To connect to the radio modem, follow the instructions shown in the dialog:a. Select the appropriate PC serial port (COM port).b. Select SNB900 and click Next. The Operation Selection dialog appears:3. Select an operation to perform and click Next. The Settings Review dialog appears.
SNB900 Radio Modem User Guide 15Configuration and Installation 34. Confirm your selected operation and click Finish. A connection status window appears, and counts to 100%, and then displays the SNB900 Configuration dialog:Use the SNB900 Configuration dialog to modify configuration settings:1. In the Mode field, select the appropriate operating mode depending on intended use. For example, Base with No Repeaters.2. In the Data Port group select the Baud Rate and Parity. This is the setting for communications between the receiver and radio.Note – The default GPS Port settings for the SNB900 is 38400 baud rate with None parity. The default Mode setting is Base with No Repeaters. 3. In the Wireless Settings group, select the current network. Note – All radios in the network must be configured with the same network, or the radios will not communicate.
3 Configuration and Installation16 SNB900 Radio Modem User Guide4. To update the configuration, click Set. When the status dialog confirms that the configuration is complete, return to the main menu or exit WinFlash.Click the RadioInfo button to view a text list of all radio information, including the current configuration settings.BTip – You can print or save to file the radio configuration information for future reference, or to send to Trimble Support to aid in troubleshooting radio problems.30.1 Firmware updatesSNB900 firmware upgrades are periodically available from the Trimble website (www.trimble.com). The radio firmware can also be upgraded using WinFlash.3.1 InstallationBefore setting up the equipment in the field, verify that each radio modem is set to the same network.Note – High-power signals from a nearby radio station or radar transmitter can overwhelm the radio modem circuits. This does not harm the instrument, but can prevent it from functioning correctly. To avoid problems, try not to use the radio modem within 400 meters (1300 feet) of powerful radar, television, or other transmitters. Low-power transmitters, such as those in portable phones and walkie-talkies, do not normally interfere with SNB900 operation.
SNB900 Radio Modem User Guide 17Configuration and Installation 3An SNB900 can be installed in a network as a base station, access point, or repeater.31.1 Installing an SNB900 as a base1. If necessary, reconfigure the serial port settings on the unit to those of the GPS receiver.Configure the unit as a base with no repeaters, or with one or two repeaters. Ensure that all units in your network are configured according to their specific task within the network.2. Before connecting the power cable:a. Attach the base antenna onto the mounting pole.b. Mount the entire antenna assembly on a tripod using the tripod mounting plate and connect the antenna cable to the SNB900 radio modem.c. Attach the antenna cable to the ANTENNA port on the unit.3. Connect the power cable from the SNB900 POWER port to an appropriate 12 V DC power source.CCaution – Make sure that the polarity is correct when you connect the power cable. The base radio modem will not turn on if you reverse the polarity.4. If the GPS receiver is outputting data, the base should now be in operation. Check the display on the SNB900 to make sure that the TRAN (transmitting) message is flashing.5. Make sure that you are on the correct channel and power output.
3 Configuration and Installation18 SNB900 Radio Modem User Guide30.1 Installing an SNB900 as a repeaterTo achieve coverage to all points in a survey area, an SNB900 network can include up to two repeaters. The repeaters retransmit data packets in a way that avoids mutual interference with the base and each other. The operation of the repeaters is transparent to the rovers. The rover will use the data packets from the base or repeater, whichever it receives first.To install a SNB900 as a repeater:1. If using only one repeater, make sure that the SNB900 is configured for Repeater 1. If using a second repeater, make sure that it is configured for Repeater 2.2. Before connecting the power cable:a. Assemble the repeater antenna, attach it to its mount, and then connect the complete assembly to the antenna mounting pole.b. Use the tripod mounting plate to mount the antenna assembly and pole on a tripod, and then connect the antenna cable to the SNB900 at the Radio Antenna port.3. Connect the power cable from the SNB900 POWER port to an appropriate 12 V DC power source. The Network menu that appears on the front panel shows which network is in use.CCaution – Connect the power cable with the correct polarity. Reversing polarity does not damage the base radio modem, but will blow the protective 10 Amp fuse in the power cable.4. Select the repeater radio modem channel to match the base radio modem channel. To do this, press the UP or DOWN key until the appropriate channel setting is displayed.5. Verify that the channel assignments are the same for all base, rover, and repeater units.
SNB900 Radio Modem User Guide 19Configuration and Installation 3The repeater should now be in operation. When the repeater receives data broadcast from the base, RPT (Repeat) flashes in the top right corner of the SNB900 display.30.1 Installing antennasSafetyYou must maintain a minimum separation distance of 20 cm (approximately 8 in) between yourself and the radiating antenna for this device to satisfy the RF Exposure requirements of the FCC. For mobile operation, the maximum gain of the antenna must not exceed 0 dBi.HeightWhen installing and locating antennas, place them as high as legally possible above the ground and surrounding obstructions, such as trees, vehicles, buildings, and hills.Note – Antenna height is the most important factor in achieving maximum range with radio modems. Doubling the antenna height results in a 40% increase in line-of-sight range. Use low loss cable if you have to increase the length of the antenna cable to accommodate your installation. Consult your license for the legal limits on antenna height.Line-of-sight obstructionsIf you place an antenna near an object, especially a metal object, you can severely limit its efficiency. When an antenna is mounted on an antenna mast, try to make sure that the radiating element of the antenna is above any possible obstruction.
3 Configuration and Installation20 SNB900 Radio Modem User Guide
CHAPTER4SNB900 Radio Modem User Guide 21Characteristics and Specifications 4In this chapter:QIntroductionQAntenna Gain
4 Characteristics and Specifications22 SNB900 Radio Modem User Guide4.1 IntroductionThis chapter summarizes the general characteristics and specifications of the SNB900.4.2 Antenna GainThe antennas supplied with an SNB900 do not increase the energy radiated by the radio modem. They concentrate the energy from the radio modem in a particular direction. The degree to which they concentrate radio frequency energy in any particular direction is called directivity and is measured in decibels (dB). The greater the antenna gain in dB, the higher the directivity and the more the radiated energy from the antenna is concentrated in some direction.42.1 Omni-directional antennasAn antenna that radiates energy equally in all directions (that is, at every azimuth) in the horizontal plane is called omni-directional. An omni-directional antenna is not omni-directional in the vertical plane, and must be oriented vertically.
SNB900 Radio Modem User Guide 23Characteristics and Specifications 4Figure 4.1 shows the radiated energy patterns of the omni-directional antennas.Figure 4.1 Omni-directional antenna gain patternsThe top view shows radiated energy patterns in the horizontal, or azimuth plane of the antennas, the plane that perpendicularly bisects the length of the antenna. For omni-directional antennas, all azimuths receive equal energy, but the 5 dB antenna radiates almost four times more power in the horizontal plane than the 0 dB antenna. In an open field, four times more power approximately doubles the range.Much of the energy from the 5 dB antenna is concentrated in elevation to within ±12° of horizontal. A rover antenna within this sector receives stronger signals from a 5 dB antenna. However, at angles greater than 12° from horizontal, the 0 dB gain antenna radiates more energy.Antenna gain has exactly the same effect on signal reception as it does on signal transmission. A high gain rover antenna can increase range performance as long as it is oriented correctly with respect to the transmitting antenna. For high gain antennas, this means keeping the antenna element vertical and at the same elevation as the transmitting antenna. Otherwise, it may be better to use an antenna with less gain.
4 Characteristics and Specifications24 SNB900 Radio Modem User Guide
CHAPTER5SNB900 Radio Modem User Guide 25Troubleshooting 5In this chapter:QIntroductionQServicingQStatus Messages
5 Troubleshooting26 SNB900 Radio Modem User Guide5.1 IntroductionThis chapter lists status messages and describes how you can use these to isolate and correct system configuration or operational issues.5.2 ServicingThere are no user-serviceable parts in an SNB900 radio modem. Contact your Trimble representative or local service provider for assistance.5.3 Status MessagesA status message can appear as a one or two line message on the front panel. Message Description ActionBattery Low The battery voltage is below 11.6 volts. Replace the battery as soon as possible.Battery Low, Radio Tu r n e d O f fThe battery voltage has dropped below 10.8 volts and the radio has stopped transmitting. Replace the battery. The SNB900 resets and starts to transmit again.Note – Battery low voltage levels are approximate and may vary according to factors such as battery condition, radio modem operating mode, and environmental factors.Comm Port Error, Check Data RateThe communications settings between the GPS receiver and the radio modem are incompatible. Use the controller or the front panel to reconfigure the GPS receiver and radio modem to the same settings.
SNB900 Radio Modem User Guide 27Troubleshooting 5Warning: Radio HotThe radio is nearing its maximum operating temperature.Reduce the data rate.Shade the radio modem from direct sunlight.CCaution – The housing of the SNB900 is hot to touch if the Radio Hot message is displayed. Use caution and reasonable care when handling an SNB900 that is in this state.Warning: Radio Hot Output OffThe unit has exceeded its maximum internal operating temperature of +85 °C (+185 °F) and has stopped transmitting.Allow the SNB900 to cool down. Reduce the power output and the data rate.Shade the SNB900 from direct sunlight.C Warning – Operating or storing an SNB900 outside the specified temperature range can damage the instrument.Connect Antenna to RadioThe radio modem is attempting to transmit but does not sense an antenna connected to the antenna port. Connect the radio antenna to the SNB900. If these are already connected, the cable and/or antenna may have failed.Note – This message never appears if the SNB900 is configured as a rover.ERROR: Bad Radio ConfigThe radio was configured incorrectly. This can occur when the radio firmware is upgraded.Reconfigure the radio modem using WinFlash or the controller.HARDWARE ERROR: XX (code number)This is a fatal error. Return the SNB900 for servicing.Write down the error code and contact your Trimble representative or local service provider for assistance.
5 Troubleshooting28 SNB900 Radio Modem User Guide
SNB900 Radio Modem User Guide 29IndexNumerics5700 GPS receiver see Trimble 5700 GPS receiver5800 GPS receiver see Trimble 5800 GPS receiverAaccessories 8antenna5 dB, 0 dB 23directional 23gain 22installing 19obstructions 19omni-directional 22orienting 22radiated energy 22safety 19antenna connector 9Bbaseinstalling SNB900 as 17SNB900 configured as 7battery charger, accessory 8Battery Low message 26Battery Low, Radio Turned Off message 26baud rate 9browsing menu screens 9Ccarry pouch, accessory 8cautionpolarity 17Radio Hot message 27temperature 7changing default settings 12characteristics 22Class B Statement iiiCMR, CMR+ 6, 7COM port 13Comm Port Error, Check Data Rate message 26comments, sending to Trimble 3compatibility 6configuring serial I/O port 12Connect Antenna to Radio message 27connecting to an office computer 13connectors 9copyright iiDdata connection, base configuration 10data connector 9, 10data modem in SNB900 12DATA PORT CONFIG menu 8data port configuration, default 10
Index30 SNB900 Radio Modem User GuideDeclaration of Conformity ivdefaultdata port configuration 10menu 9mode 10network 10settings, changing 12Device Configuration dialog 13DEVICE STATUS menu 8directional antenna 23display 8Eelectrical connectors 9electronic interference 16energy radiated by antenna 22error messages 8ERROR, Bad Radio Config message 27external radios 6Ffactory settings 10factory settings, changing 12features 6feedback on documentation 3firmware updates 16font panel, messages 26front panel display 8GGPS receivers 12grade control systems 6HHARDWARE ERROR, XX (code number) message 27Iinstallingantenna 19prerequisites 16SNB900 as a base 17SNB900 as a repeater 18SNB900 in a network 17interference, reducing electronic 16LLimitation of Liability iiiline-of-sight (LOS) 7, 19Mmachine grade control systems 6menu display 8menu hierarchy 9menu, browsing 9messageRPT (Repeat) 19TRAN 17messageserror 8troubleshooting 26Microsoft Windows 12MODE menu 8mode, default 10MS750 GPS receiver 7, 12Nnetwork frequency display 8NETWORK menu 8network, default 10network, installing SNB900 in 17network, same for all radio modems 16NEXT menu 9
IndexSNB900 Radio Modem User Guide 31Notice to Users iiiOobstructions, line-of-sight 19office computer, connecting to 12omni-directional antenna 22operating mode 15operating system 12Operation Selection dialog 14orienting the antenna 22overview 5Pparity 9polarity, power cable 17, 18power and I/O cables 10power cable polarity 17, 18POWER connector 10power connector 9power source 17power/data connector 9RR7 GPS receiver see Trimble R7 GPS receiverR8 GPS receiver see Trimble R8 GPS receiverradar interference 16radio in SNB900 12radio information 16radio interference 16radio modem networ 7radio modem network 16radio status display 8rear panel 9release notes 2repeaterinstalling SNB900 as 17, 18maximum number 7SNB900 used as 7router 6rover, SNB900 configured as 7RPT (Repeat) message flashing 19RTCM SC-104 6SSafety iiisafety, antenna 19scrolling 9serial I/O port, configuring 12setting up the equipment 16settingschanging default 12default 10Settings Review dialog 14setup utility, communications 13setup, interference 16SiteNet external radio 6SNB900 Configuration dialog 15SNR900 radio, compatible with 6specifications 22standard features 6status messages 26support 3survey-grade GPS receivers 6connecting to 7Ttechnical support 3temperature, operating 7trademarks iiTRAN message flashing 17Trimble 5700 GPS receiver 7, 12internal radio 6Trimble 5800 GPS receiver 7, 12
Index32 SNB900 Radio Modem User Guideinternal radio 6Trimble Network Router (TNR) 6Trimble R7 GPS receiver 7, 12Trimble R8 GPS receiver 7, 12Trimble website 2troubleshooting 26UUP/DOWN menu 9update notes 2updating firmware 16use and care 7VVFD display 8Wwarningradio hot 27temperature 27Warning, Radio Hot message 27Warning, Radio Hot Output Off message 27warranty iiwebsite, Trimble 2WinFlashconfiguration cable 10operating system requirements 12starting 13wireless settings 15

Navigation menu