Trimble 5580090 GPS Receiver with 900 MHz FHSS Transceiver User Manual Trimble SPSx50 Modular GPS Receiver User Guide

Trimble Navigation Ltd GPS Receiver with 900 MHz FHSS Transceiver Trimble SPSx50 Modular GPS Receiver User Guide

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Version 1.0Revision BMarch 2006 USER GUIDETrimble® SPSx50 Modular GPS Receiver

iv SPSx50 Modular GPS Receiver User Guide

SPSx50 Modular GPS Receiver User Guide vSafety InformationBefore you use your Trimble® SPS GPS receiver, make sure that you have read and understood all safety requirements.Regulations and safetyThe receivers contain an internal radio-modem and can send signals through Bluetooth® wireless technology (SPSx50 Modular GPS receiver and the SPSx80 Smart GPS antenna only) or through an external data communications radio. Regulations regarding the use of the radio-modems vary greatly from country to country. In some countries, the unit can be used without obtaining an end-user license. Other countries require end-user licensing. For licensing information, consult your local Trimble dealer.Before operating an SPSx50 Modular GPS receiver or SPSx80 Smart GPS antenna, determine if authorization or a license to operate the unit is required in your country. It is the responsibility of the end user to obtain an operator’s permit or license for the receiver for the location or country of use.For FCC regulations, see Notices, page iii.Type approvalType approval, or acceptance, covers technical parameters of the equipment related to emissions that can cause interference. Type approval is granted to the manufacturer of the transmission equipment, independent from the operation or licensing of the units. Some countries have unique technical requirements for operation in particular radio-modem frequency bands. To comply with those requirements, Trimble may have modified your equipment to be granted Type approval. Unauthorized modification of the units voids the Type approval, the warranty, and the operational license of the equipment.Exposure to radio frequency radiationFor 450 MHz radioSafety. Exposure to RF energy is an important safety consideration. The FCC has adopted a safety standard for human exposure to radio frequency electromagnetic energy emitted by FCC regulated equipment as a result of its actions in General Docket 79-144 on March 13, 1986.Proper use of this radio modem results in exposure below government limits. The following precautions are recommended:•DO NOT operate the transmitter when someone is 20 cm (7.8 inches) of the antenna.•DO NOT operate the transmitter unless all RF connectors are secure and any open connectors are properly terminated.

Safety Informationvi SPSx50 Modular GPS Receiver User Guide•DO NOT operate the equipment near electrical blasting caps or in an explosive atmosphere.•All equipment must be properly grounded according to Trimble installation instructions for safe operation.•All equipment should be serviced only by a qualified technician.For license-free 900 MHz radioCCAUTION – For your own safety, and in terms of the RF Exposure requirements of the FCC, always observe the precautions listed here.•Always maintain a minimum separation distance of 20 cm (7.8 inches) between yourself and the radiating antenna on the SPSx50 radio-modem.•Do not co-locate the antenna with any other transmitting device.For Bluetooth radioThe radiated output power of the internal Bluetooth wireless radio is far below the FCC radio frequency exposure limits. Nevertheless, the wireless radio shall be used in such a manner that the Trimble receiver is 20 cm or further from the human body. The internal wireless radio operates within guidelines found in radio frequency safety standards and recommendations, which reflect the consensus of the scientific community. Trimble therefore believes the internal wireless radio is safe for use by consumers. The level of energy emitted is far less than the electromagnetic energy emitted by wireless devices such as mobile phones. However, the use of wireless radios may be restricted in some situations or environments, such as on aircraft. If you are unsure of restrictions, you are encouraged to ask for authorization before turning on the wireless radio.Installing antennasCCAUTION – For your own safety, and in terms of the RF Exposure requirements of the FCC, always observe these precautions:– Always maintain a minimum separation distance of 20 cm (7.8 inches) between yourself and the radiating antenna.– Do not co-locate the antenna with any other transmitting device.This device has been designed to operate with the antennas listed below, and having a maximum gain of 5 dBi. Antennas not included in this list, or having a gain greater than 5 dBi, are strictly prohibited for use with this device. The required antenna impedance is 50 ohms.The antennas to be used with the 450 MHz radio are 0 dBi and 5 dBi whip antennas. The antennas to be used with the 900MHz radio are 0dBi, 3dBi, and 5dBi whip antennas.To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that permitted for successful communication.

SPSx50 Modular GPS Receiver User Guide viiSafety InformationBattery safetyCWARNING – Do not damage the rechargeable Lithium-ion battery. A damaged battery can cause an explosion or fire, and can result in personal injury and/or property damage. To prevent injury or damage: – Do not use or charge the battery if it appears to be damaged. Signs of damage include, but are not limited to, discoloration, warping, and leaking battery fluid.– Do not expose the battery to fire, high temperature, or direct sunlight. – Do not immerse the battery in water. – Do not use or store the battery inside a vehicle during hot weather. – Do not drop or puncture the battery. – Do not open the battery or short-circuit its contacts.CWARNING – Avoid contact with the rechargeable Lithium-ion battery if it appears to be leaking. Battery fluid is corrosive, and contact with it can result in personal injury and/or property damage.To prevent injury or damage:– If the battery leaks, avoid contact with the battery fluid. – If battery fluid gets into your eyes, immediately rinse your eyes with clean water and seek medical attention. Do not rub your eyes! – If battery fluid gets onto your skin or clothing, immediately use clean water to wash off the battery fluid.CWARNING – Charge and use the rechargeable Lithium-ion battery only in strict accordance with the instructions. Charging or using the battery in unauthorized equipment can cause an explosion or fire, and can result in personal injury and/or equipment damage. To prevent injury or damage: – Do not charge or use the battery if it appears to be damaged or leaking.– Charge the Lithium-ion battery only in a Trimble product that is specified to charge it. Be sure to follow all instructions that are provided with the battery charger. – Discontinue charging a battery that gives off extreme heat or a burning odor.– Use the battery only in Trimble equipment that is specified to use it. – Use the battery only for its intended use and according to the instructions in the product documentation.

Safety Informationviii SPSx50 Modular GPS Receiver User Guide

SPSx50 Modular GPS Receiver User Guide ixContentsSafety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vRegulations and safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vType approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vExposure to radio frequency radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vFor 450 MHz radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vFor license-free 900 MHz radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viFor Bluetooth radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viInstalling antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viBattery safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13About the SPSx50 receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13SPS550 GPS receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13SPS550H GPS receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13SPS750 GPS receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13SPS850 Extreme GPS receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Your Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Features and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15SPS550 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16SPS550H features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17SPS750 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17SPS750 standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17SPS750 Basic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19SPS750 Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19SPS850 Extreme features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Base station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Rover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Use and care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21COCOM limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Keypad and display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Rear connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 Batteries and Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25External power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Battery safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Battery performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Charging the Lithium-ion battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Storing the Lithium-ion battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Removing the rechargeable Lithium-ion battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Contentsx SPSx50 Modular GPS Receiver User GuideOperating the receiver with a Trimble controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284 Setup Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Base station operation guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Base station components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Base station setup guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Permanent installation antenna cabling for the SPSx50 Modular GPS receiverand SPS770 GPS receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Rover operation guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Rover receiver components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Rover receiver setup guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355 Setting up the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39Connecting the receiver to external devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Trimble controller with SCS900 Site Controller software . . . . . . . . . . . . . . . . . . . . 40External radio-modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Common ways to set up a base station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Setting up a base station for permanent or semi-permanent installation. . . . . . . . . . 42Setting up a base station for daily site use: T-Bar . . . . . . . . . . . . . . . . . . . . . . . . . 43Setting up a mobile base station: Tripod and fixed height tripod . . . . . . . . . . . . . . . 44Common ways to set up a rover receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Setting up the rover receiver on a jobsite vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 47Setting up the rover receiver on a rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Setting up a rover receiver on a belt or in a backpack . . . . . . . . . . . . . . . . . . . . . . 50Setting up a pair of SPSx50 GPS receivers to provide heading . . . . . . . . . . . . . . . . . . . . . 51The Moving Baseline RTK positioning technique. . . . . . . . . . . . . . . . . . . . . . . . . 51Mounting a pair of SPSx50 GPS receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Assembling the receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Installing the receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Mounting the antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Configuring the receiver pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Interfacing using the NMEA protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 586 Configuring the SPSx50 Using the Keypad and Display . . . . . . . . . . . 59Button functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Power button operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Home screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Status screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Configuring the SPSx50 as a base receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Configuring the receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62Configuring the SPSx50 as a rover receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64Configuring the receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64Configuring system settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

SPSx50 Modular GPS Receiver User Guide xiContents7 Configuring the Receiver Settings . . . . . . . . . . . . . . . . . . . . . . . 67Using the SCS900 Site Controller software to configure the base station, the rover,and the radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68Configuring the receiver to log data for postprocessing . . . . . . . . . . . . . . . . . . . . . . . . . 69Configuring Ethernet settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69Configuring the SPSx50 receiver using a web browser . . . . . . . . . . . . . . . . . . . . . . . . . . 72Supported browsers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72Changing the settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 748 Automatically Setting up a Mobile Base Station Using AutoBaseTechnology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87AutoBase Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88Working with AutoBase technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88Scenario One: First visit to a site with AutoBase Warning turned off . . . . . . . . . . . . 88Scenario Two: First visit to a site with AutoBase Warning turned on . . . . . . . . . . . . 89Scenario Three: Repeat visit to a site with AutoBase Warning turned off . . . . . . . . . . 89Scenario Four: Repeat visit to a site with AutoBase Warning turned on . . . . . . . . . . 90Flowchart showing the AutoBase process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 919 Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93Default receiver settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94Resetting the receiver to factory defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94Data Logging option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94Logging data after a power loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9510 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100Communication specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101GPS satellite signal tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102Integrated radio options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102Variable configuration options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103Upgrading the receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103A NMEA-0183 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105NMEA-0183 message overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106Common message elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107Message values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107NMEA messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107B GSOF Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123Supported message types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124GSOF message definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Contentsxii SPSx50 Modular GPS Receiver User GuideLLH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125ECEF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125ECEF DELTA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126NEU DELTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127PDOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127SIGMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127SV Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128SV Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129UTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130Batt/Mem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130Attitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132Data collector report structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134C Adding Internal Radio Frequencies . . . . . . . . . . . . . . . . . . . . . 135Adding receive frequencies for the 450 MHz internal radio. . . . . . . . . . . . . . . . . . . . . . .136D Real-Time Data and Services . . . . . . . . . . . . . . . . . . . . . . . . . 137RT17 Streamed Data service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Using the keypad and display to configure RT17 outputs. . . . . . . . . . . . . . . . . . . .138Using the web interface to configure RT17 outputs . . . . . . . . . . . . . . . . . . . . . . .138E Upgrading the Receiver Firmware . . . . . . . . . . . . . . . . . . . . . . 139The WinFlash utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140Installing the WinFlash utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140Upgrading the receiver firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140Forcing the receiver into Monitor mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141F Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143Receiver issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

CHAPTER1SPSx50 Modular GPS Receiver User Guide 13Introduction 1Welcome to the SPSx50 Modular GPS Receiver User Guide. This manual describes how to set up and use the Trimble® SPSx50 Modular GPS receivers. The SPS GPS receivers is a family of receivers that comprise the SPSx50 Modular GPS receivers, SPS770 GPS receivers, and the SPSx80 Smart GPS antennas. Where necessary, this manual contains references to specific receivers in the product family. When information is specific to a particular model, then the specific model name is used. 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.About the SPSx50 receiversThe SPSx50 Modular GPS receiver family comprises the following receivers:•SPS550•SPS550H•SPS750 Basic base•SPS750 Basic rover•SPS750 Max•SPS850 ExtremeSPS550 GPS receiverThe Trimble SPS550 is a dual-frequency location GPS receiver. The SPS550 can operate as a DGPS reference station or as a DGPS rover receiver, and can use Satellite Based Augmentation Systems (SBAS). The receiver can also function as a rover receiver that uses OmniSTAR XP or HP correction services. The SPS550 is ideal for mobile applications on marine vessels and site vehicles where Real-Time Kinematic (RTK) accuracy is not needed. The SPS550 can be used with the SPS550H GPS receiver to provide both position and precise heading solutions for marine applications.SPS550H GPS receiverThe Trimble SPS550H is an add-on receiver that can be combined with the SPS550, SPS750 Max, or SPS850 Extreme to provide a precise heading capability using Trimble moving base technology. SPS750 GPS receiverThe Trimble SPS750 is a dual-frequency GPS receiver with the ability to receive OmniSTAR corrections. The receiver is available in the following configurations:•SPS750 Basic base•SPS750 Basic rover•SPS750 MaxThe SPS750 can be configured using the keypad and display, a web browser, or the Trimble SCS900 Site Controller software. The SPS750 makes it easy to set up a mobile base station or a

1 Introduction14 SPSx50 Modular GPS Receiver User Guidepermanent base station for continuous operation. The SPS750 is also an ideal mobile receiver for semi-permanent mounting on vehicles and marine vessels.SPS850 Extreme GPS receiverThe Trimble SPS850 Extreme is a triple-frequency GPS plus GLONASS receiver with the ability to receive OmniSTAR corrections. The SPS850 Extreme can operate as a base station or rover. The receiver can be configured using the keypad and display, web browser, or Trimble SCS900 Site Controller software. The SPS850 Extreme makes it easy to set up a mobile base station or a permanent base station for continuous operation. The SPS850 Extreme is also an ideal mobile receiver for semi-permanent mounting on vehicles and marine vessels.Related InformationSources of related information include the following:•Help – The SCS900 Site Controller software has built-in, context-sensitive help that lets you quickly find the information you need. Access it from the Help menu. Alternatively, click the ? button in a dialog, or press [F1]. On a Microsoft® Windows® CE device, select Start / Help.•Release notes – The release 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 Trimble SPS GPS Receiver CD. •Trimble training courses – Consider a training course to help you use your GPS system to its fullest potential. For more information, go to the Trimble website at www.trimble.com/training.html.Technical SupportIf you have a problem and cannot find the information you need in the product documentation, contact your local dealer. Alternatively, go to the Support area of the Trimble website (www.trimble.com/support.shtml). Select the product you need information on. Product updates, documentation, and any support issues are available for download.If you need to contact Trimble technical support, complete the online inquiry form at www.trimble.com/support_form.asp. Your CommentsYour feedback about the supporting documentation helps us to improve it with each revision. E-mail your comments to ReaderFeedback@trimble.com.

CHAPTER2SPSx50 Modular GPS Receiver User Guide 15Features and Functions 2In this chapter:QSPS550 featuresQSPS550H featuresQSPS750 featuresQSPS850 Extreme featuresQUse and careQCOCOM limitsQKeypad and displayQRear connectorsTrimble SPSx50 Modular GPS receivers are ideal for the following infrastructure development, site development, and marine construction applications:•Mobile base station for RTK or DGPS applications•Permanent base station for Virtual Reference Station (VRS™), RTK, or DGPS applications (SPS550, SPS750, and SPS850 only).Note – The permanent base station for VRS requires an option to be enabled. For more information, please contact your Trimble dealer.•RTK rover on rod, backpack, site vehicle, or marine vessel•Site and marine location applications using OmniSTAR HP or XP corrections•Site and marine location applications using DGPS RTCM correctionsYou can use the SPSx50 Modular GPS receivers with the Trimble SCS900 Site Controller software.These receivers all feature a keypad and display so you can configure the receiver without using a controller or computer.All the receivers can record GPS data to the internal memory, and optionally transfer the data over a USB or serial connection, or download data through an Ethernet connection.

2 Features and Functions16 SPSx50 Modular GPS Receiver User GuideSPS550 featuresThe receiver provides the following features:•Location GPS – Sub-meter DGPS rover and base station capability•Decimeter accuracy when using RTK corrections by radio link or VRS•OmniSTAR XP/HP for a base station free service•Optional internal 450 MHz (3 frequency bands) radio with transmit and receive capability (SPS550 only)•Optional internal 900 MHz radio with transmit and receive capability (SPS550 only)•WAAS/EGNOS and MSAS Satellite Based Augmentation (SBAS) compatibility•24-channel L1/L2 GPS receiver – Single-frequency GPS for DGPS position solution and dual-frequency GPS for OmniSTAR XP/HP and heading solution•Long-life integrated battery, typically 10 hours operation as a base station or 12 hours as a rover•Integrated display and keypad for rapid system configuration and status checking, without the need for a controller •Integrated Bluetooth wireless technology for cable-free configuration and operation with a controller•Ethernet support, so that the receiver can be configured remotely across an Ethernet network or the Internet•Attached or external radio antenna option for rover or “High Gain” base station operation•Small, lightweight design – 1.65 kg (3.64 lbs) receiver only, with battery•Permanent/semi-permanent and mobile quick setup DGPS base station capability•The ability to broadcast corrections through multiple radio links from one base station receiver (for example, through an internal 450 MHz radio and an external 900 MHz radio)•Tough aluminum housing•IP67 environmental rating•–40°C to +65°C (–40°F to +149°F) operating temperature range•9 V to 30 V DC input power range, with over-voltage protection•Two-line, 16-character VFD (Vacuum Fluorescent Display) display

SPSx50 Modular GPS Receiver User Guide 17Features and Functions 2SPS550H featuresThe SPS550H receiver provides the following features:•Precise Heading Add-on GPS receiver•24-channel L1/L2 GPS receiver for heading solution•Long-life integrated battery, typically 12 hours as a rover•Integrated display and keypad for rapid system configuration and status checking, without the need for a controller •Integrated Bluetooth wireless technology for cable-free configuration and operation with a controller•Ethernet support, so that the receiver can be configured remotely across and Ethernet network or the Internet•Dual-frequency antenna, dual SPS receiver mounting frame, and interconnecting cable•Small, lightweight design – 1.65 kg (3.64 lbs) receiver only, with battery•Tough aluminum housing•IP67 environmental rating•–40°C to +65°C (–40°F to +149°F) operating temperature range•9 V to 30 V DC input power range, with over-voltage protection•Two-line, 16-character VFD (Vacuum Fluorescent Display) displaySPS750 featuresThe SPS750 receiver provides the following standard features. For features specific to each model, see below.SPS750 standard features•Integrated GPS receiver and radio•450 or 900 MHz radio:– SPS750 Max has transmit and receive capabilities– Basic base has transmit capabilities only–Basic rover has receive capabilities only•24-channel L1/L2 GPS receiver•OmniSTAR XP and HP service capability

2 Features and Functions18 SPSx50 Modular GPS Receiver User Guide•WAAS/EGNOS (Wide Area Augmentation System/European Geo-Stationary Navigation System), and MSAS Satellite Based Augmentation (SBAS) compatibility•Long- life integrated battery, typically 10 hours operation as a base station or 12 hours as a rover•Operation parameters configured using the WinFlash utility, Trimble SCS900 Site Controller software, the integrated display and keyboard for system configuration with a controller, or the Web receiver interface•Integrated Bluetooth wireless technology for cable-free configuration and operation with a controller•External GPS antenna choice for base station or rover operation•Attached or external radio antenna option for rover or high-gain base station radio operation•Small, lightweight design – 1.65 kg (3.64 lbs) receiver only, with battery; 4 kg (8.82 lbs) complete system weight (rover including controller and rod)•Permanent/semi-permanent and mobile quick setup base station capability•Backpack, belt, rod, truck, and marine vessel mounting options for rover applications•Capable of all site measurement and stakeout operations within 1.5 km (SPS750 Basic) and typically >5 km (SPS750 Max)•Easy-to-use menu system for rapid configuration and status checking•AutoBase™ technology for rapid and automated repeated daily base station setups•Ethernet support, so that the receiver can be configured remotely across and Ethernet network or the Internet•The ability to broadcast corrections via multiple radio links from one base station receiver (for example, via an internal 450 MHz radio and an external 900 MHz radio)•Two-line, 16-character VFD (Vacuum Fluorescent Display) display•CAN (Controller Area Network) support•Rugged, weatherproof construction with an IP67 environmental rating•–40°C to +65°C (–40°F to +149°F) operating temperature range•9 V DC to 30 V DC input power range, with over-voltage protection

SPSx50 Modular GPS Receiver User Guide 19Features and Functions 2SPS750 Basic•Base station only, or Rover only, operationSPS750 Basic base•Entry-level, low cost RTK base station•Unrestricted operational range for rovers and grade control systems•Integrated transmit-only radio•Easily upgraded to the SPS750 MaxSPS750 Basic rover•Entry-level, low cost RTK rover receiver•2 Hz measurement update rate•2.4 km (1.5 mile) operational range from the base station•Integrated receive-only radio•Ideal for contractors new to GPS as a starter system or for operating multiple small projects •Easily upgraded to the SPS750 MaxSPS750 Max•RTK base station and rover operation in a single receiver•Integrated receive/transmit radio•5 or 10 Hz measurement update rate•Unrestricted rover operation range from a base station•Operates within a VRS network, for base station-free rover capability•For marine applications: Moving baseline and heading capability when a Max or Extreme receiver is combined with an SPS550H GPS receiver or an RTK rover-capable SPSx50 GPS receiverSPS850 Extreme featuresThe SPS850 Extreme receiver provides the following features:•Integrated GPS receiver and radio•450 or 900 MHz radio with transmit/receive capability•72-channel L1/L2/L2C/L5 GPS plus L1/L2 GLONASS receiver•OmniSTAR XP and HP service capability

2 Features and Functions20 SPSx50 Modular GPS Receiver User Guide•WAAS/EGNOS, and MSAS Satellite Based Augmentation (SBAS) compatibility•Long- life integrated battery, typically 10 hours operation as a base station or 12 hours as a rover•Integrated display and keypad for system configuration without a controller•Integrated Bluetooth wireless technology for cable-free configuration and operation with a controller•External GPS antenna choice for base station or rover operation•Attached or external radio antenna option for rover or "High Gain" base station operation•Small, lightweight design – 1.65 kg (3.64 lbs) receiver only, with battery; 4 kg (8.82 lbs) complete system weight (rover including controller and rod)•Permanent/semi-permanent and mobile quick setup base station capability•Backpack, belt, rod, truck, and marine vessel mounting options for rover applications•Within radio or cellular phone coverage, full site measurement and stakeout capability•Rover operation capability within a VRS (Virtual Reference Station) network•Easy-to-use menu system for rapid configuration and status checking•AutoBase technology for rapid and automated repeated daily base station setups•The ability to broadcast corrections via multiple radio links from one base station receiver (for example, via an internal 450 MHz radio and an external 900 MHz radio)•Two-line, 16-character VFD (Vacuum Fluorescent Display) display•Rugged, weatherproof construction with an IP67 environmental rating•–40° C to +65° C (–40° F to +149° F) operating temperature range•9 V to 30 V DC input power range, with over-voltage protectionBase station•Unrestricted operational range for rovers and grade control systems•Base station and rover operation in a single receiver•Integrated receive/transmit radio•Integrated Ethernet and IP capability facilitates base station and receiver configuration over the Internet or via Ethernet connection on a computer network

SPSx50 Modular GPS Receiver User Guide 21Features and Functions 2•For marine applications: Moving baseline and heading capability when a Max or Extreme receiver is combined with an SPS550H GPS receiver or an RTK rover-capable SPSx50 GPS receiverRover•5, 10, or 20 Hz measurement update rate•Unrestricted rover operation range from a base station•Base station-free rover capability within a VRS network•Base station-free rover capability using OmniSTAR HP or XP services, with <30 cm (1 ft) accuracy•Ideal for contractors who operate mid to large size projects with machine controlUse and careThis product is designed to withstand the rough treatment and tough environment that typically occurs in construction applications. However, the receiver is a high-precision electronic instrument and should be treated with reasonable care.CCAUTION – Operating or storing the receiver outside the specified temperature range can damage it. For more information, see Chapter 10, Specifications.COCOM limitsThe U.S. Department of Commerce requires that all exportable GPS products contain performance limitations so that they cannot be used in a manner that could threaten the security of the United States. The following limitations are implemented on this product:•Immediate access to satellite measurements and navigation results is disabled when the receiver velocity is computed to be greater than 1000 knots, or its altitude is computed to be above 18 000 meters. The receiver GPS subsystem resets until the COCOM situation clears. As a result, all logging and stream configurations stop until the GPS subsystem is cleared.

2 Features and Functions22 SPSx50 Modular GPS Receiver User GuideKeypad and displayFigure 2.1 Front view of the SPSx50 GPS receiverFeature Description1 Power LED Indicates if the receiver is turned on or off.2 Buttons Used to turn on and configure the receiver (see Button functions, page 60).3 Display The receiver has a Vacuum Fluorescent Display. This display allows you to see how the receiver is operating and view the configuration settings. 4 Bluetooth antenna Location of the Bluetooth antenna.13422

SPSx50 Modular GPS Receiver User Guide 23Features and Functions 2Rear connectorsFigure 2.2 Rear view of the SPSx50 GPS receiverConnector type Description1 TNC Connect to the GPS antenna2 • TNC (450 MHz Internal radio) • Reverse polarity TNC (900 MHz internal radio)• Not installed, system without internal radioConnect to the radio antenna3 Vent plug External venting plug for pressure equalization4 High Density DB26• Ethernet connectivity to a 10/100 Base-T network through an RJ45 jack on a multiport adaptor (P/N 57167)• 'Slave' USB communications through the USB type B connector on the Multiport adaptor (P/N 57167)• 'Host' USB communications through the USB type A connector on the 26-pin to Hirose adaptor (P/N 56653) and Hirose to USB type A cable (P/N 73841001)• Primary power from a Trimble AC/DC power supply (P/N 48800-00) using the multiport adaptor (P/N 57167)• Power input from an SPS700 total station battery cradle system using the adaptor (P/N 56653)• Full 8 wire RS-232 serial communications using the 26-9-pin multiport adaptor (P/N 57168) or a 26-pin serial communications cable• 3 wire RS-232 serial adaptor5 Lemo (7-pin/ 0-shell) • 3 wire RS-232 serial communications using a 7-pin/ 0 shell Lemo cable• Secondary power from a Trimble battery (P/N 32364-00 or 32365-00) or a 12 V battery using the Fused Lemo Power Cable (P/N 46125-00)•CAN14352

2 Features and Functions24 SPSx50 Modular GPS Receiver User Guide

CHAPTER3SPSx50 Modular GPS Receiver User Guide 25Batteries and Power 3In this chapter:QExternal powerQBattery safetyQBattery performanceQCharging the Lithium-ion batteryQStoring the Lithium-ion batteryQRemoving the rechargeable Lithium-ion batteryQOperating the receiver with a Trimble controllerThe SPSx50 GPS receiver uses an internal rechargeable Lithium-ion battery, which can be replaced only at an Authorized Trimble Service Center.The receiver can also be powered by an external power source that is connected to the Lemo or modem port.The operational time provided by the internal battery depends on the type of measurement and operating conditions. Typically, the internal battery provides 10 hours operation as a base station and 12 hours as a rover during measurement operations using the internal radio.Note – All battery operation tests are carried out with new, fully charged batteries at room temperature and full receiver configuration operational. Older batteries, at temperatures significantly higher or lower than room temperature, will have a reduced performance. Receivers operating with reduced configuration will have a higher performance.

3 Batteries and Power26 SPSx50 Modular GPS Receiver User GuideExternal powerThe GPS receiver uses an external power source in preference to its internal batteries. If the receiver is not connected to an external power source, or if the external power supply fails, the internal batteries are used. While carrying out static measurements for postprocessed computations using the internal memory, if no external power is supplied and the internal battery is drained, the receiver shuts down. No data is lost and when power is restored, the receiver restarts in the same status as it was when power was lost.Battery safetyThe receiver is powered by a rechargable internal Lithium-ion battery. Charge and use the battery only in strict accordance with the instructions below.CWARNING – Do not damage the rechargeable Lithium-ion battery. A damaged battery can cause an explosion or fire, and can result in personal injury and/or property damage. To prevent injury or damage: – Do not use or charge the battery if it appears to be damaged. Signs of damage include, but are not limited to, discoloration, warping, and leaking battery fluid.– Do not expose the battery to fire, high temperature, or direct sunlight. – Do not immerse the battery in water. – Do not use or store the battery inside a vehicle during hot weather. – Do not drop or puncture the battery. – Do not open the battery or short-circuit its contacts.CWARNING – Avoid contact with the rechargeable Lithium-ion battery if it appears to be leaking. Battery fluid is corrosive, and contact with it can result in personal injury and/or property damage.To prevent injury or damage:– If the battery leaks, avoid contact with the battery fluid. – If battery fluid gets into your eyes, immediately rinse your eyes with clean water and seek medical attention. Do not rub your eyes! – If battery fluid gets onto your skin or clothing, immediately use clean water to wash off the battery fluid.Battery performanceTo optimize battery performance and extend battery life:•Fully charge all new batteries before use. •Batteries perform best when they are not used at extreme temperatures. The receiver is designed to operate at –40 °C to +65 °C (–40 °F to +149 °F). However, operation at temperatures of less than 0 °C (32 °F) can cause a rapid drop in battery life. •Do not allow a battery that is in storage to discharge to below 5 V.

SPSx50 Modular GPS Receiver User Guide 27Batteries and Power 3Charging the Lithium-ion batteryThe rechargeable Lithium-ion battery is supplied partially charged. Charge the battery completely before using it for the first time. If the battery has been stored for longer than three months, charge it before use.The internal battery charges fully in 8 hours when connected to a suitable power source. CWARNING – Charge and use the rechargeable Lithium-ion battery only in strict accordance with the instructions. Charging or using the battery in unauthorized equipment can cause an explosion or fire, and can result in personal injury and/or equipment damage. To prevent injury or damage: – Do not charge or use the battery if it appears to be damaged or leaking.– Charge the Lithium-ion battery only with a Trimble product that is specified to charge it. Be sure to follow all instructions that are provided with the battery charger. – Discontinue charging a battery that gives off extreme heat or a burning odor.– Use the battery only in Trimble equipment that is specified to use it. – Use the battery only for its intended use and according to the instructions in the product documentation.Storing the Lithium-ion batteryIf you must store a Lithium-ion battery for long periods, make sure that it is fully charged before it is stored, and that you charge it at least once every three months while it is stored. Do not allow a battery that is in storage to discharge to below 5 V. A battery that reaches deep discharge level (5 V or less) cannot be recharged and must be replaced. (To protect a battery that is in use from deep discharge, the receiver switches power sources or stops drawing power when the battery pack discharges to 5.9 V.)All batteries discharge over time when not in use, and they discharge faster in colder temperatures. Do not store the receiver at temperatures outside the range –40 °C to +70 °C (–40 °F to +158 °F). The SPSx50 receiver has an internal Lithium-ion battery. The internal battery will only charge from an external power source that delivers more than 15 volts, for example, an AC power adaptor. The receiver is supplied with a mains power supply unit that recharges the battery inside the receiver when it is connected through the adaptor to the modem port or the Lemo port. When you use the receiver on large projects, from a permanent or semi-permanent base station location in a site trailer, Trimble recommends that you use this power supply at all times to keep the internal battery charged. This provides an uninterrupted power supply and will keep the site operational for more than 10 hours after a power failure.Keep all batteries on continuous charge when not in use. You can keep batteries on charge indefinitely without damage to the receiver or to the batteries.

3 Batteries and Power28 SPSx50 Modular GPS Receiver User GuideRemoving the rechargeable Lithium-ion batteryThe internal Lithium-ion battery should be removed only at an authorized Trimble Service Center. If the battery is removed at an unauthorized service center, the remaining warranty on the product will be void. Operating the receiver with a Trimble controllerYou can operate an SPS GPS receiver with any Trimble controller, for example, a TSC2 or TCU controller, that is running the SCS900 software. Typically, the receiver and the controller operate from their own individual power sources. The receiver and controller can communicate through Bluetooth wireless technology and can be connected without a cable. However, if a cable is required, the following information indicates which cable to use with which controller:Controller Cable Controller connector Receiver connectorTSC2 P/N 18532 DSub9 DSub9TCU P/N 5302007 6H (Marked “Com” on the controller GPS holder)DSub9TCU (alternative connection)P/N 53004007 6H (Marked “Com” on the controller GPS holder)7OS

CHAPTER4SPSx50 Modular GPS Receiver User Guide 29Setup Guidelines 4In this chapter:QBase station operation guidelinesQRover operation guidelinesGPS Real-Time Kinematic (RTK) operation provides centimeter-level accuracy by eliminating errors that are present in the GPS system. For all RTK operations, you require both a base station and a rover receiver.This chapter introduces the concepts of base station and rover operation, provides information to help you identify good setup locations, describes best practices for setting up the equipment, and outlines the precautions that you need to take to protect the equipment.Note – This chapter provides setup information for all the receivers in the SPS GPS receiver family.

4 Setup Guidelines30 SPSx50 Modular GPS Receiver User GuideBase station operation guidelinesA base station consists of a receiver that is placed at a known (and fixed) position. The receiver tracks the same satellites that are being tracked by the rover receiver, at the same time that the rover is tracking them. Errors in the GPS system are monitored at the fixed (and known) base station, and a series of position corrections are computed. The corrections are sent through a radio link to the rover receiver, where they are used to correct the real time positions of the rover.Base station componentsThe base station has the following components:•GPS receiver•GPS antenna•Base station radio•Power supplyGPS receiver and GPS antennaThe base station GPS receiver can be one of following types:•A Smart GPS antenna, such as the SPSx80, which incorporates a GPS receiver, GPS antenna, power supply, and base station radio into a single compact unit. A Smart GPS antenna can be rapidly set up on a tripod, fixed height tripod, or T-Bar anywhere that is convenient on the jobsite.•A Modular GPS receiver, such as the SPSx50, which incorporates a GPS receiver, power supply, and base station radio in a single unit. The GPS antenna (and, optionally, the base station radio antenna) is separate from the receiver. Because the GPS antenna is separate, you can use the following optimized components: – a geodetic antenna with large ground plane, to eliminate multipath (the major source of GPS errors) at the base station– a high gain or directional radio antenna, to increase broadcast range and to provide maximum coverageYou can also place a modular GPS receiver in an easily accessible and secure location, safe from theft and the weather, while the antennas are placed high on a tower or building, clear of obstructions and able to deliver maximum performance.You can use either type of receiver in a permanent, semi-permanent, or daily quick setup configuration. If semi-permanent or permanent operation is required, however, the modular receiver delivers significant advantages.

SPSx50 Modular GPS Receiver User Guide 31Setup Guidelines 4Base station setup guidelinesFor good performance, observe the following base station setup guidelines:•Place the GPS receiver in a location on the jobsite where equal range in all directions provides full coverage of the site. This is more important on larger jobsites, where the broadcast range of the base station radio may limit the operations of the GPS system.•Place the GPS antenna in a location that has a clear line of sight to the sky in all directions. Do not place the GPS antenna near vertical obstructions such as buildings, deep cuttings, site vehicles, towers, or tree canopy.•Place the GPS and radio antennas as high as practical. This minimizes multipath from the surrounding area, and enables the radio to broadcast to the maximum distance. Note – The GPS antenna must have a clear line of sight to the sky at all times during operation. •Choose the most appropriate radio antenna for the size and footprint of the site. The higher the gain on the antenna, the longer the range. If there is more focus on the transmission signal, there is a reduced coverage area. A 3 db or 5 db gain antenna provides a mix of good range and reasonable directional coverage.•Make sure that the GPS receiver does not lose power. The GPS receiver has an integrated battery, which has to be charged. To operate for the full day without loss of power at the base station, provide external power. Sources of external power include:–AC power– 12 V car or truck battery– Trimble custom external battery pack– Generator power–Solar panelWhen you use an external power supply, the integrated battery provides a backup power supply, enabling you to maintain continuous operation through a mains power failure. When the GPS receiver is connected to a power source greater than 15 V, the integrated battery is continuously charged from the connected power source. This helps to ensure that the battery stays charged (SPS770 and SPSx50 only).•Do not locate a GPS receiver, GPS antenna, or radio antenna within 400 meters (about 1312 feet) of: – a powerful radar, television, or cellular communications tower–another transmitter– another GPS antenna

4 Setup Guidelines32 SPSx50 Modular GPS Receiver User GuideCellular phone towers can interfere with the base station radio broadcast and can stop corrections from reaching the rover receiver. High-power signals from a nearby radio or radar transmitter can overwhelm the receiver circuits. This does not harm the receiver, but can prevent the receiver electronics from functioning correctly.Low-power transmitters, such as those in cellular phones and two-way radios, do not interfere with receiver operations. •Do not set up the base station directly beneath or close to overhead power lines or electrical generation facilities. The electromagnetic fields associated with these utilities can interfere with GPS receiver operation. Other sources of electromagnetic interference include:– Gasoline engines (spark plugs)– Televisions and computer monitors– Alternators and generators– Electric motors–Equipment with DC-to-AC converters– Fluorescent lights–Switching power supplies•Place the GPS receivers in a protected and secure location. If the base station is in the center of a jobsite where heavy machinery is operating, place flags around the base station to warn operators of its existence.•If you place the SPSx50 Modular GPS receiver or SPS770 GPS receiver in a lock box on the jobsite to protect the receiver from theft or from the weather, shield the lock box from direct sunlight and provide ventilation for the receiver through an inlet and extractor fan. A receiver that has a broadcast radio generates significant heat. Do not allow the temperature in the box to exceed 65 ºC (149 ºF). If working in a cold climate, you may need to provide heat to the receiver. Do not operate the receiver below –40 ºC (–40 ºF).•Trimble recommends that, wherever possible, you keep GPS receiver equipment dry. The receivers are designed to withstand wet weather, but keeping them dry prolongs their life and reduces the effects of corrosion on ports and connectors. If the equipment gets wet, use a clean dry cloth to dry the equipment, and then leave the equipment open to the air to dry. Do not lock wet equipment in a transport case for prolonged periods. Avoid exposing the GPS receiver to corrosive liquids and salt water wherever possible.

SPSx50 Modular GPS Receiver User Guide 33Setup Guidelines 4•Trimble recommends that you install lightning protection equipment at permanent base station locations. Equipment should include a gas capsule lightning protector in the GPS and radio antenna feed line and appropriate safety grounding. A static dissipater near the antennas can reduce the likelihood of a direct lightning strike. Also protect any communications and power lines at building entry points. For more information, contact your local Trimble dealer, or go to the Huber and Suhner website (www.hubersuhnerinc.com).•Trimble recommends that you use surge protection equipment on all permanently installed equipment.Permanent installation antenna cabling for the SPSx50 Modular GPS receiver and SPS770 GPS receiverMany permanent base station installations have unique cabling requirements. Depending on the available infrastructure, you may need to mount the antenna a considerable distance from the receiver.The SPSx50 and SPS770 can withstand a loss of 12 dB between the GPS antenna and the receiver. The degree of loss in a coaxial cable depends on the frequency of the signal passing through it. Table 4.1 lists some common cable types and the maximum length you can use before an inline amplifier for GPS frequencies is required.Rover operation guidelinesThe second part of the RTK GPS system is the rover receiver.The rover receiver is mounted on a pole, vehicle, marine vessel, or in a backpack, and is moved between the points that require measurement or stakeout. The rover receiver is connected to a base station or to a source of RTK corrections such as a Virtual Reference Station (VRS) system. The connection is provided by an integrated radio, a Table 4.1 Maximum cable lengthsCable type Maximum length (for use without an inline amplifier)RG-214 30 m (100 ft)LMR-400 70 m (230 ft)LMR-500 85 m (280 ft)LMR-600 106 m (350 ft)Heliax LDF4/50 165 m (540 ft)Heliax LDF4.5/40 225 m (740 ft)

4 Setup Guidelines34 SPSx50 Modular GPS Receiver User Guidecellular modem in the controller, or through an external cellular phone that is connected to the receiver either by Bluetooth wireless technology or by means of a cable.The correction stream for some other positioning solutions, such as SBAS (WAAS/EGNOS, and MSAS) and the OmniSTAR XP or HP service1, is broadcast through geostationary satellites, and detected by the GPS antenna itself. No integrated radio or base station is required.Rover receiver componentsThe rover receiver has the following components:•GPS receiver•GPS antenna•Optional integrated radio receiver and antenna for RTK operations•Optional items for the different mounting options (see below)In most rover applications, the receiver operates entirely from its own integrated battery unit. On a vehicle or on a marine vessel, however, an external power supply can be used. Use an external power supply if one is provided. The internal battery then acts as a uninterruptible power supply, covering any external power failures.Choose a rover receiver according to the needs of the job:•A Smart GPS antenna, such as the SPSx80, incorporates the GPS receiver, GPS antenna, power supply, and receive radio into a single compact unit. A Smart GPS antenna can be rapidly set up on a pole, vehicle, or backpack. This makes it easy to carry when you are measuring around the jobsite. •A Modular GPS receiver, such as the SPSx50, incorporates the GPS receiver, receive radio, and power supply into a single unit. The GPS antenna and, optionally, the receive radio antenna, is separate from the receiver. When you use a modular GPS receiver as a rover, you can use optimized components placed in the best locations for your application. For example:– A small, lightweight rover antenna can be mounted on a pole or backpack; placed in a high, inaccessible location on a marine vessel mast or cabin; or placed on a site vehicle roof or truck bed.– A rubber duck radio antenna, or an external radio antenna, can be mounted on a vehicle or vessel roof to provide maximum coverage.A Modular GPS receiver can be placed in a location that is both easily accessible and safe from theft and the weather. The antennas can be placed high on a vehicle or vessel roof, clear of obstructions and able to deliver maximum performance.1. OmniSTAR is only available with the SPSx50 Modular GPS receiver.

SPSx50 Modular GPS Receiver User Guide 35Setup Guidelines 4Rover receiver setup guidelinesFor good rover operation, observe the following setup guidelines:•Place the GPS antenna in a location that has a clear line of sight to the sky in all directions. Do not place the antenna near vertical obstructions such as buildings, deep cuttings, site vehicles, towers, or tree canopy. GPS rovers and the base station receive the same satellite signals from the same satellites: if you obscure the signals at times, the system will be unable to provide RTK Fixed positions.•Place the GPS and radio antennas as high as possible to minimize multipath from the surrounding area. The receiver must have a clear line of sight to the sky at all times during operation.•GPS satellites are constantly moving. Because you cannot measure at a specific location now does not mean that you will not be able to measure there later, when satellite coverage or location improves. Use GPS planning software to identify the daily best and worst satellite coverage times for your location, and then choose measurement times that coincide with optimal GPS performance. This is especially important when operating in the worst GPS locations.•The SPS770 Extreme, the SPS850 Extreme, and SPS880 Extreme can track the GPS L2C modernization signal. Additionally, the SPS850 Extreme and SPS880 Extreme can track the GPS L5 modernization signal and the GLONASS satellite constellation. These signals help you to get positions at the worst times of the day and in the worst GPS locations, but do not guarantee that you will.•To get a fixed position solution with centimeter accuracy, initialize the rover receiver. For initialization to take place, the receiver must track at least five satellites that the base station is also tracking. In a dual-satellite constellation operation, for example, GPS and GLONASS, the receiver must track at least six satellites.•To maintain a fixed position solution, the rover must continuously track at least four satellites that the base station is also tracking. In a dual-satellite constellation operation, for example, GPS and GLONASS, the receiver must track at least five satellites.The radio link between the base and rover receivers must also be maintained.•Loss of the satellite signals or loss of the radio link results in a loss of centimeter position accuracy. From Fixed, the receiver changes to Float or Autonomous mode:– In Float mode, the rover has connection to the base station through a radio, but has not yet initialized. – In Autonomous mode, the rover has lost radio contact with the base station receiver, and is working by itself with the available GPS signals.

4 Setup Guidelines36 SPSx50 Modular GPS Receiver User Guide•On a vehicle or marine vessel, place the GPS antenna in a location as free from shock and vibration as possible. For the modular receivers, a single magnetic mount is normally sufficient to hold the antenna in a suitable location, whereas for the larger smart antenna, a triple magnetic mount is normally recommended. Good alternatives include a 5/8" thread bolt in a suitable location on the roof bars, or a door-mounted pole bracket.CCAUTION – The SPS880 Extreme is not suited to on-vehicle operation where it will be subject to heavy vibration, that is, operation in rough ungraded terrain. Use in these conditions can damage the SPS880 Extreme.•To mount the modular receiver on a pole, use two pole mounting brackets and a second tripod clip (P/N 571 204 300). See Figure 4.1. Figure 4.1 Rod mount for modular receiverTo mount the modular receiver on a marine vessel, use the receiver bracket (P/N 56830-00). For marine moving base and heading applications, use the receiver bracket to mount two receivers together.

SPSx50 Modular GPS Receiver User Guide 37Setup Guidelines 4•Make sure that the rover receiver does not lose power. An SPSx50 is typically powered by its internal battery for the entire day. You cannot change the battery, but the charge lasts for longer than a day. The batteries in the SPSx80 can be changed when flat. (See Chapter 3, Batteries and Power). If you do not use the rover receiver very often, ensure that it is charged at least every three months. For vehicle operation or marine vessel operation, Trimble recommends that you use an external power source so that the internal battery can be saved for times when the receiver is being used off the vehicle or vessel. •Do not locate the receiver or antenna within 400 meters (1312 ft) of powerful radar, television, cellular communications tower, or other transmitters or GPS antennas. Low-power transmitters, such as those in cellular phones and two-way radios, normally do not interfere with receiver operations. Cellular towers can interfere with the radio and can interfere with GPS signals entering the receiver. High-power signals from a nearby radio or radar transmitter can overwhelm the receiver circuits. This does not harm the receiver, but it can prevent the receiver electronics from functioning correctly.•Do not use the rover receiver directly beneath or close to overhead power lines or electrical generation facilities. The electromagnetic fields associated with these utilities can interfere with GPS receiver operation. Other sources of electromagnetic interference include:– gasoline engines (spark plugs)– televisions and computer monitors– alternators and generators– electric motors–equipment with DC-to-AC converters– fluorescent lights– switching power supplies•Trimble recommends that, wherever possible, all GPS receiver equipment is protected from rain or water. Although, the receivers are designed to withstand all wet weather conditions, keeping the receivers dry prolongs the life of the equipment and reduces the effects of corrosion on ports and connectors. If the equipment gets wet, use a clean dry cloth to dry the equipment, and then leave the equipment open to the air to dry. Do not lock wet equipment in a transport case for prolonged periods. Wherever possible, avoid exposing the GPS receiver to corrosive liquids and salt water.•If you are using the rover receiver in open spaces, Trimble recommends that you stop work during electrical storms where the risk of lightning strike is high.•Where cables are involved, Trimble recommends that you use cable ties to secure the cables to the rod or other equipment to avoid inadvertent snagging while moving about the jobsite. Be careful not to kink, twist, or unnecessarily extend cables, and avoid trapping them in vehicle doors or windows. Damage to cables can reduce the performance of GPS equipment.

4 Setup Guidelines38 SPSx50 Modular GPS Receiver User GuideInternal radio setup for rover operationsThe internal radio of the SPS GPS receiver is delivered with the transmit (Tx) radio frequencies preprogrammed into the receiver. To add receive (Rx) radio frequencies to 450 MHz radios, use the WinFlash utility (see Appendix C, Adding Internal Radio Frequencies). Radio frequences cannot be added to the 900 MHz radios.Once the radio frequencies are configured, use the controller or receiver to select channel frequencies during base station or rover setup operations.

CHAPTER5SPSx50 Modular GPS Receiver User Guide 39Setting up the Receiver 5QConnecting the receiver to external devicesQCommon ways to set up a base stationQCommon ways to set up a rover receiverQSetting up a pair of SPSx50 GPS receivers to provide headingThis chapter provides guidelines for setting up the SPSx50 receiver as a base station, or as a rover receiver in a range of common use scenarios.This chapter also describes the procedure for setting up a pair of receivers for heading and moving base marine construction applications.Note – This chapter provides setup information for all the receivers in the SPS GPS receiver family.

5 Setting up the Receiver40 SPSx50 Modular GPS Receiver User GuideConnecting the receiver to external devicesYou can connect an SPSx50 to the following devices:•a Trimble controller running Trimble SCS900 Site Controller software•an external radio-modem•HYDROpro™ softwareTrimble controller with SCS900 Site Controller softwareTo connect a Trimble controller that is running the SCS900 Site Controller software to an SPS GPS receiver, use Bluetooth wireless technology ( for all except the SPS770 GPS receiver) or a serial cable. Table 5.1 shows how to connect the cables for each combination of SPS GPS receiver and Trimble controller.Table 5.1 Connecting to a Trimble controller running the SCS900 Site Controller softwareUse this cable connector …and connect the cable to …Cable part numberTo connect a SPSx50 Modular GPS receiver to a …TSC2 DB9 TSC2 32960Lemo SPSx50TCU 6-pin Hirose TCU 53004007Lemo SPSx50TSCe™ Lemo TSCe 31288-xxLemo SPSx50 This cable is available in different lengths. The -xx indicates the length of the cable, in meters.ACU 4-pin Hirose ACU 44147Lemo SPSx50To connect a SPS770 GPS receiver to a …TSC2 DB9 TSC2 32960Lemo (Port 1) SPS770TCU 6-pin Hirose TCU 53004007Lemo (Port 1) SPS770TSCe Lemo TSCe 31288-xxLemo (Port 1) SPS770 This cable is available in different lengths. The -xx indicates the length of the cable, in meters. ACU 4-pin Hirose ACU 44147Lemo SPSx50To connect a SPSx80 Smart GPS antenna to a …TSC2 DB9 TSC2 32960Lemo (Port 1) SPSx80TCU 6-pin Hirose TCU 53004007Lemo (Port 1) SPSx80

SPSx50 Modular GPS Receiver User Guide 41Setting up the Receiver 5External radio-modemsThe most common data link for Real-Time Kinematic (RTK) operation is a radio. The SPSx50 is available with the following internal radios:•410–430 MHz (Tx/Rx, Rx only, or Tx only)•430–450 MHz (Tx/Rx, Rx only, or Tx only)•450–470 MHz (Tx/Rx, Rx only, or Tx only)•900 MHz (Tx/Rx, Rx only, or Tx only)Note – “Tx” indicates that the radio transmits corrections. “Rx” indicates that the receiver receives corrections. “Tx/Rx” indicates that the radio both transmits and receives corrections.If the SPSx50 does not have an internal transmit radio, or you want to connect to higher power or to a secondary external transmit radio or cellular modem, use the 26-pin port, the Lemo port, or Bluetooth wireless technology.The SPSx50 supports the following Trimble base radios:•TRIMMARK™ 3•Trimble SNB900•Trimble PDL450•Trimble HPB450The SPSx50 receiver also supports third-party transparent radios and third-party cellular modems.When used with an SPSx50 GPS receiver, most external radios require an external power source. Only the Trimble SNB900 radio-modem has an internal battery and does not require external power.Configure the external radio separately, using either the configuration program for the external radio or the radio display and keypad.To configure the SPSx50 for RTK operation, follow the base setup procedure to set the following parameters:•Set the base station coordinates•Enable the RTCM or CMR+™ corrections stream on the selected serial port.TSCe Lemo TSCe 31288-xxLemo (Port 1) SPSx80 This cable is available in different lengths. The -xx indicates the length of the cable, in meters. ACU 4-pin Hirose ACU 44147Lemo SPSx80Table 5.1 Connecting to a Trimble controller running the SCS900 Site Controller softwareUse this cable connector …and connect the cable to …Cable part number

5 Setting up the Receiver42 SPSx50 Modular GPS Receiver User GuideCommon ways to set up a base stationYou can set up a base station in different ways depending on the application, coverage area, degree of permanence versus mobility, and available infrastructure. Before you set up a base station, please read Chapter 4, Setup Guidelines.Setting up a base station for permanent or semi-permanent installationFor construction applications, where machine and site positioning operations using GPS will be carried out over a long time (weeks, months, or years), ensure that you choose the base station location carefully. A semi-permanent or permanent base station helps to eliminate the types of error that can result from repeated daily setups, and ensures that you always use the GPS antenna at the exact original location. The requirement for a permanent base station setup increases as more receivers that use the base station as a source of corrections, increases the cost of any base station downtime. On the largest jobsites, and on those that remain operational for the longest time, a permanent or semi-permanent installation is a popular solution. An SPSx50 or SPS770 GPS receiver is typically used as the base station, located in a site office or trailer where it is easy to access (to check or configure), and where it is secure from theft and the weather. The GPS and radio antennas are normally mounted on a permanent structure on the roof of the building, where they are high and clear from obstructions and where the radio antenna can provide the maximum range of operation. The GPS antenna most commonly used is the Trimble Zephyr Geodetic™ Model 2. This antenna has a large ground plane that eliminates multipath, providing the best GPS performance at the base location. The antennas are connected to the receiver by high quality RF cables.The receiver is connected to a permanent power supply (mains or generator power). The internal battery of the receiver is always being charged, and acts as an uninterruptible power supply if there is a power failure. In some cases, the receiver may also be connected by an Ethernet cable to the Internet, so that it can be monitored and configured from a remote location, and can warn an administrator by e-mail or text message if there is a change to the configuration. In these situations, the receiver can transmit GPS RTK corrections to a remote radio or receiver over the Internet, for rebroadcast requirements, without using repeaters.

SPSx50 Modular GPS Receiver User Guide 43Setting up the Receiver 5 Figure 5.1 SPSx50 receiver permanent installationSetting up a base station for daily site use: T-BarFor construction applications where a daily setup and takedown of equipment is required for security reasons, Trimble recommends that you use a T-Bar setup. The T-Bar consists of a post mounted in concrete (so it cannot move), which has a solid metal T-Bar mounted to it to provide lateral separation between the GPS antenna and radio antenna. The T piece of the T-Bar has a vertical rod at each end. Each end terminates in a 5/8"×11 thread to which the antennas can be mounted. Trimble recommends that one end is clearly marked GPS and the other end is clearly marked Radio so that at each daily setup, the GPS and radio antennas are mounted at the same location. Switching antennas by mistake introduces a position error in all resulting measurements. You can buy the parts you need to make a T-Bar from any reputable hardware store. Make certain that the T-Bar cannot rotate after construction. Rotation of the T-Bar can introduce a position error into all subsequent measurements.On the upright post, mount either a bracket (to which the GPS receiver can be mounted), or a well-ventilated lockbox (in which the GPS receiver itself can be secured).

5 Setting up the Receiver44 SPSx50 Modular GPS Receiver User GuideEach day, mount the GPS antenna on the GPS end of the T-Bar and the radio antenna on the Radio end of the T-Bar. Connect the antennas to the receiver using the appropriate cables.The receiver uses its own integrated battery, or an external 12 V battery through the 12 V crocodile clips cable that are provided with the receiver. If you choose to use AC power, remember that the heat generated by the charging process and the radio transmitter increases the need for good ventilation around the receiver.In such scenarios, an SPSx80 Smart GPS antenna is also often used. Simply mount the SPSx80 on the T-Bar, and optionally connect to an external battery or radio unit.AdvantagesUse of a T-Bar setup ensures that the base station is set up with exactly the same position and height every day. This helps eliminate the errors typically associated with daily tripod setup. For example, wrong antenna height, base not set up over the point, base set up in the wrong location.Figure 5.2 System set up on a T-bar showing an external radio antenna to gain longer rangeSetting up a mobile base station: Tripod and fixed height tripodIf you are repeatedly moving between jobsites, or if you are visiting a jobsite for the first time before a T-Bar or similar setup can be established, Trimble recommends that you use either a tripod and tribrach setup, or a fixed height tripod.The fixed height tripod is quicker and easier to set up over a control point. Take great care to ensure that the GPS antenna is set up accurately over the control point, and that the GPS antenna height is measured accurately, in the right way (vertical or slope GPSRadio

SPSx50 Modular GPS Receiver User Guide 45Setting up the Receiver 5height) to the right location on the antenna (base of antenna or to a specified location on the antenna). When you start the rover receiver, it is extremely important to check in, at one or more known locations, to check for possible position or height errors. Checking in at a known location is good practice and can avoid costly errors caused by a bad setup.Typically, the tripod and fixed height tripod methods do not give significant height clearance above the ground, and can reduce the range of operation caused by radio limitations.Tripod and tribrach setupIn the tripod setup, the tripod is located over the control point, and the tribrach and tribrach adaptor is mounted on the tripod and centered over the point. 1. Mount the GPS antenna on the tribrach adaptor. – If you are using a SPSx80 Smart GPS antenna, use the 25 cm spacer rod provided with the SPSx80 base station accessory kit. This allows the radio antenna in the receiver to clear the head of the tripod. 2. Clip the GPS receiver to the tripod (SPSx50 and SPS770 only).3. Connect the GPS antenna to the receiver using the appropriate cable (SPSx50 and SPS770 only). 4. If necessary, connect the GPS receiver to an external 12 V power supply. Use the crocodile clip cable or the Trimble custom power pack.Figure 5.3 Tripod and tribrach setup for the SPSx50 and the SPSx80SPSx80 with an internal 450 MHz TX radioSPSx50 with an external high-gain antennaSPSx50 with a low-gain “rubber duck” antenna

5 Setting up the Receiver46 SPSx50 Modular GPS Receiver User GuideFixed height tripod setupA fixed height tripod setup is similar to a tripod setup, but is simplified by the central leg of the tripod, that is placed directly on the control point. If the central leg is leveled accurately, the fixed height tripod is quick and easy to set up, and provides an accurate way to measure the true antenna height.1. Set up the tripod over the control point.2. Attach the GPS antenna to the head of the tripod.3. If using an external high-gain radio antenna, mount the radio antenna to the radio antenna bracket that is attached to the head of the tripod (beneath the GPS antenna). See Figure 5.4.4. If using the SPSx50 Modular GPS receiver, hook the receiver to the center leg of the tripod, using the tripod clip. 5. If using the SPSx80 Smart GPS antenna, you can mount the antenna using the 25 cm spacer rod (supplied with the SPSx80 Base Station Accessory kit) so that the radio antenna clears the head of the tripod. Figure 5.4 Fixed height tripod setup for the SPSx50 and SPSx80SPSx80 with an internal 450 MHz TX radio on a fixed height tripodSPSx50 with an external high-gain radio antennaSPSx50 with a low-gain “rubber duck” antennaRadio antenna bracket

SPSx50 Modular GPS Receiver User Guide 47Setting up the Receiver 5Common ways to set up a rover receiverYou can set up a rover receiver in different ways depending on the application. The components that make up a rover receiver are:•GPS receiver•GPS antenna•controller/computer•rod mounting equipment, including a rod, receiver bracket, and controller bracket•vehicle mounting equipment, including a suction cup and ball joint, extension arm, controller bracket, magnetic antenna mount, and necessary cables.•backpack equipment, including backpack and antenna-mounting rod•marine vessel mounting equipment, including receiver bracket, cables, antenna, and radio antenna brackets.Setting up the rover receiver on a jobsite vehicleCCAUTION – This following rover setup is suited only to offroad (jobsite) vehicle use. Do not use this method on a vehicle that is driven at speed or in traffic.1. Do one of the following, depending on your receiver:– SPSx50 or SPS770: Mount the GPS antenna for the receiver on the roof of the vehicle. Use a single magnetic mount or a 5/8"×11 thread bolt attached to the roof bars. Run the GPS antenna cable for the receiver into the vehicle either through a rubber grommet in the roof, or through the passenger door window, which needs to be left slightly open during operation.– SPSx80: Mount the receiver on the roof of the vehicle. Use a triple magnetic mount or a 5/8"×11 thread bolt attached to the roof bars.2. Place and secure the GPS receiver in a convenient location in the vehicle.The GPS receiver can be controlled through the controller connected using Bluetooth wireless technology (SPSx50 or SPSx80) or a cable connected to a port on the receiver (SPS770).The receiver needs to be accessed only to turn it on at the start of each measurement session. It may be more convenient if the SPSx50 is placed in a location where the vehicle operator can see the keypad and display, to monitor receiver status and to configure settings as required. Most receiver capability can be controlled using the SCS900 Site Controller software.3. Attach the suction cup to the front windscreen, dashboard, or other convenient location in the vehicle, making sure that it does not obstruct the driver’s view.

5 Setting up the Receiver48 SPSx50 Modular GPS Receiver User Guide4. Attach the RAM extension arm to the suction cup, and the controller bracket to the RAM extension arm. 5. Lock the controller into the controller bracket and then adjust the bracket until the controller is in the most convenient location. Make sure that the controller does not restrict visibility through the front windscreen during vehicle use.6. Lock the brackets so that the controller is held securely. If required, connect either the GPS receiver or the controller to an in-vehicle power supply as needed.Figure 5.5 Configuring SPSx50 from the cab. A Zephyr Model 2 antenna is mounted on the roof

SPSx50 Modular GPS Receiver User Guide 49Setting up the Receiver 5Setting up the rover receiver on a rodFor rod-based operation, mount the SPSx50 Modular GPS receiver as follows: 1. Mount the two rod brackets on the rod.2. Tighten the top bracket, making sure that it is at a convenient height for the receiver.3. Place the receiver in the slot in the rod bracket, and secure with the tripod clip.4. Move the lower rod bracket down until it is over the second tripod clip on the receiver, and then tighten the rod bracket onto the rod. The receiver is held in place between the two brackets.5. Insert the controller into the controller bracket as shown opposite.6. Use the 5/8" thread to attach the GPS antenna to the top of the rod. 7. Use the GPS antenna cable to connect GPS antenna to the receiver.For rod-based operation, mount the SPSx80 Smart GPS antenna as follows:1. Mount the receiver on the top of the rod using the 5/8"×11 thread in the base of the SPSx80.2. Insert the controller into the controller bracket.3. The SPSx80 and controller communicates through Bluetooth wireless technology. However, if a cable is required, connect the cable between the controller and receiver (see Figure 5.6 through Figure 5.7).

5 Setting up the Receiver50 SPSx50 Modular GPS Receiver User GuideFigure 5.6 Connections for a rover SPSx80 setup, a TSC2 or TCU controller, and a 450 Mhz base stationFigure 5.7 Cabled connections for an SPSx80 setup, a TSC2 or TCU controller, and a 900 Mhz base station (with external power)Setting up a rover receiver on a belt or in a backpackIf you prefer to work free of the weight of a pole, you can mount the rover receiver on a belt (SPS770 or SPSx50 only) or carry it in/on a backpack (all receivers). When you wear the receiver on a belt, ensure that the display is always visible so that you can easily check the status of the receiver. If you carry the receiver in a backpack, use an external radio antenna mount to allow for optimal radio signal reception. If you use a low gain antenna mounted directly on the receiver in a backpack, it may affect the radio signal reception and reduce the likelihood of obtaining an RTK Fixed solution.Cabled connections Bluetooth connectionsP/N 53002007P/N 32960<<diagram being updated>>P/N 53002007P/N 32960P/N 312888-02P/N 46125-00

SPSx50 Modular GPS Receiver User Guide 51Setting up the Receiver 5Setting up a pair of SPSx50 GPS receivers to provide headingThe SPS550H receiver is permanently in Heading mode and, when combined with a suitable Trimble receiver, provides GPS heading. Other SPSx50 GPS receivers can be used for heading only if they can operate in Heading mode (see Configuring the receiver pair, page 57).The SPS550H is a dual-frequency GPS receiver with a dual-frequency antenna, but it does not operate as a stand-alone DGPS receiver. To compute a true north heading and to be capable of positioning, the receiver requires an output message from another SPSx50 receiver. To determine the precise vector between two moving objects, pair the SPS550H Heading add-on with any one of the following SPSx50 receivers: •SPS550•SPS750 Max•SPS850Connect the antenna on the SPS550H to the other SPSx50 receiver to determine the precise GPS heading between the two antennas. The SPS550H GPS receiver shows the heading on the two-line display, and outputs the heading data in NMEA or binary format.BTip – To create a single, compact GPS position and heading unit, use the mounting frame provided to stack the SPS550H GPS receiver on top of another SPSx50 GPS receiver. See below. Use the Marine Heading Cable (P/N 57169) provided.The Moving Baseline RTK positioning techniqueIn most RTK applications, the reference receiver remains stationary at a known location and the rover receiver can move. However, Moving Baseline RTK is an RTK positioning technique in which both reference and rover receivers can move about. Moving Baseline RTK is useful for GPS applications that require vessel orientation.Figure 5.8 Vessel heading from Moving Baseline RTK Vessel headingAntennaAntenna

5 Setting up the Receiver52 SPSx50 Modular GPS Receiver User GuideWith Moving Baseline RTK, the reference receiver broadcasts Compact Measurement Record (CMR™) data every epoch, while the rover receiver performs a synchronized baseline solution at 10 Hz. The resultant baseline solution has centimeter-level accuracy. To increase the accuracy of the absolute location of the two antennas, the Moving Reference receiver can use differential corrections from a static source, such as a shore-based reference station.Mounting a pair of SPSx50 GPS receiversTo obtain a position and heading solution, you need to connect two SPSx50 receivers to make one compact unit. A mounting bracket and interconnecting cable is supplied with the SPS550H receiver. Set up the receivers, antennas, and cables as shown in Figure 5.9. Figure 5.9 Installation setup for the SPS550H with another SPSx50 receiver for position and headingDual-frequency rover antenna Dual-frequency rover antennaSPS550HSPSx50Antenna cableMarine headingcable (P/N 57169)Serial Port 2SPS550HSerial Port 2SPSx50 DC power Mounting bracket(P/N 56830-00)

SPSx50 Modular GPS Receiver User Guide 53Setting up the Receiver 5Assembling the receiversFigure 5.10 shows an SPS550 and an SPS550H set up to provide a Heading solution. To assemble the receivers, you need a Phillips head #1 screwdriver and a 1/4" socket set or wrench (spanner).Figure 5.10 Completed assembly with the SPS550H GPS receiver on topTo assemble the receivers using the mounting frame that is provided:1. Invert the SPSx50 GPS receiver and then remove the rubber endcaps.2. Prepare the flat black plate and the four Posi screws. (These are part of the mounting frame.)3. Position the black plate on the SPSx50 GPS receiver.SPS550H GPS receiverOther SPSx50 GPS receiver

5 Setting up the Receiver54 SPSx50 Modular GPS Receiver User Guide4. Use the four Posi screws to secure the plate to the receiver. (Secure two screws at each end.) The black plate is now attached to the bottom of the SPSx50 GPS receiver.5. Replace the rubber endcaps.6. Invert the SPSx50 receiver again. This returns the receiver to its normal orientation.7. Set aside the SPSx50 receiver.8. Invert the SPS550H receiver and then remove the rubber endcaps.9. Position the black cradle on the SPS550H GPS receiver. (The black cradle is part of the mounting frame.)10. Use the four Posi screws to attach the black cradle to the receiver. The black cradle is now attached to the bottom of the SPS550H.

SPSx50 Modular GPS Receiver User Guide 55Setting up the Receiver 511. Replace the rubber endcaps. 12. Place the black cradle on the black base plate. This places the SPS550H GPS receiver on top of the SPSx50 GPS receiver.13. Make sure that the display is facing in the same direction on both receivers.14. Prepare the eight nuts, spring washers, and flat washers.

5 Setting up the Receiver56 SPSx50 Modular GPS Receiver User Guide15. Insert the first bolt. Attach the flat washer, the spring washer, and finally the nut and then tighten firmly. Secure all eight bolts in this way.16. Attach one connector from the Marine Heading Cable (P/N 57169) to the 26-pin connector on the rear of the SPS550H GPS receiver. Attach the other connector from the cable to the 26-pin connector on the rear of the SPSx50 receiver. The cable can be connected either way around. The cable connects the two GPS receivers so that the Heading solution is available. The DC power lead on the cable supplies power to both receivers in the stack. The two DB9 female connectors on the cable access serial port 2 on each receiver.

SPSx50 Modular GPS Receiver User Guide 57Setting up the Receiver 5Installing the receiverSelect a location at which all of the following conditions are met:•the receiver is not exposed to temperature extremes•the receiver is not exposed to moisture extremes (such as rain, snow, water blasters, or wash systems)•the receiver is protected from mechanical damage•you can connect and disconnect cables without placing undue stress on themMounting the antennasYou must install each antenna at the correct location. Poor or incorrect placement can influence accuracy and reliability.Ideally, mount the two antennas as far apart as possible and at about the same height on the structure. Mount the antennas fore and aft along the vessel centerline or on a line that is at a known orientation to the centerline. Always mount an antenna at a location that ensures a good view of the sky. Follow these guidelines to select the antenna location:•Choose an area with a clear view of the sky. The antenna must be above any metallic objects.•Do not mount the antenna close to stays, electrical cables, metal masts, or other antennas.•Do not mount the antenna near a transmitting antenna, a radar array, or near satellite communication equipment.•Avoid areas with high vibration, excessive heat, electrical interference, and strong magnetic fields.Use a 5/8"×11 stainless steel bolt to mount each of the antennas. There is a threaded bolt hole in the base of the antenna.Configuring the receiver pairOne of the receivers must be nominated as a Heading unit. The other receiver is nominated as a Moving Base unit. For this configuration to work, you must use the Marine heading cable (P/N 57169). To set up the Heading unit:1. From the Home screen, press L twice. The Mode screen appears.

5 Setting up the Receiver58 SPSx50 Modular GPS Receiver User Guide2. Select Heading mode. The SPSx50 display shows two extra settings for heading: –Heading Adjustment. Enter a positive value in decimal degrees. The value is applied to the raw heading value before it is output in the NMEA HDT message or displayed on the front panel of the receiver. This value is used when the two antennas are not mounted parallel to the vessel axis.–Minimum Heading Solution. Enter the minimum requirement for the GPS solution that will provide the heading value. The default of RTK Fixed provides the highest precision, but in conditions of extreme multipath or obstruction, an RTK Fixed solution may not be continuously available. In such conditions, select RTK Float if a lower precision is acceptable. To set up the Moving Base unit:1. From the Home screen, press L twice. The Mode screen appears. 2. Select Moving Base mode.Interfacing using the NMEA protocolThe SPS550H GPS receiver can output messages such as NMEA HDT for heading, and NMEA GGA for position. The SPS550H always reports the solution status of the moving baseline solution that is being used to compute the heading. For example, the Modem (serial port 2) on the SPS750, which is typically RTK Fixed Integer. However, if the external computer must know the exact quality of the position, you can use the NMEA output from the base receiver. The base receiver reports the solution status of the position, for example, Fixed Integer, Floating, or DGPS.

CHAPTER6SPSx50 Modular GPS Receiver User Guide 59Configuring the SPSx50 Using the Keypad and Display 6In this chapter:QButton functionsQPower button operationsQHome screenQStatus screensQConfiguring the SPSx50 as a base receiverQConfiguring the SPSx50 as a rover receiverQConfiguring system settingsThe receiver features a keypad and display (see Keypad and display, page 22) so that you can configure the receiver without using a controller or computer.

6 Configuring the SPSx50 Using the Keypad and Display60 SPSx50 Modular GPS Receiver User GuideButton functionsThe SPSx50 has seven buttons on the front panel to control the receiver. Use the buttons to turn the receiver on and off and to check or change the receiver settings. Power button operationsPress the Power button E to turn the receiver on and off. In addition, you can tap the Power button to return to the Home screen, or hold down the Power button to perform the following operations: Button Name FunctionEPower Turns the receiver on and off. To turn the receiver off, hold the Power button for two seconds.FEscape Returns to the previous screen or cancels changes being made on a screen.LEnter Advances to the next screen or accepts changes made on a screen.JUp Moves the cursor between multiple fields on a screen or makes changes to an editable field.KDown Moves the cursor between multiple fields on a screen or makes changes to an editable field.ILeft Moves the cursor between characters in a field that can be changed.GRight Moves the cursor between characters in a field that can be changed. Press this button to enter Edit mode.To … Hold the E button for …Notesturn off the receiver two seconds The display shows a countdown timer. When the display goes blank, release the Power button.clear the almanac, ephemeris, and SV information15 seconds The display show a countdown timer. When the display goes blank, continue to hold the Power button. The display shows a countdown time to clear the almanac and ephemeris. When the counter reaches 0, release the Power button.reset the receiver to its factory defaults and the default application file35 seconds The display show a countdown timer. When the display goes blank, continue to hold the Power button. The display show a countdown to clear the almanac and ephemeris. When the counter reaches 0, continue to hold the Power button. The display indicates a countdown to resetting the receiver. When the counter reaches 0, release the Power button.force the receiver to power downat least 60 secondsIf the method above does not work, use this method to force the receiver to turn off. When the Power LED goes off, release the Power button.

SPSx50 Modular GPS Receiver User Guide 61Configuring the SPSx50 Using the Keypad and Display 6Home screenThe Home screen is the main screen displayed on the SPSx50 receiver. If the receiver is displaying another screen and is left idle for 60 seconds, you are returned to the Home screen. It shows the following information:•Number of satellites being tracked•Internal battery power remaining•Current mode configuration•Internal radio activity•Internal radio channel or networkStatus screensThe SPSx50 GPS receivers have several view-only status screens that allow you to review the current settings of the receiver. The status screens provide the following information:•Position solution•CMR and RTCM IDs•Base name and code•Latitude, longitude, and height•Antenna height•Horizontal and vertical precision•Receiver firmware version•Receiver serial number•Receiver IP addressTo access these screens from the Home screen, press J or K . Configuring the SPSx50 as a base receiverTo set up the SPSx50 as a base receiver, use AutoBase technology, the Trimble SCS900 Site Controller software, or the receiver keypad. The AutoBase feature automatically configures the receiver settings for you; there is no need to use the keypad. The receiver obtains a position and outputs RTK corrections on the internal radio (if available) or on the LEMO port. See Chapter 8, Automatically Setting up a Mobile Base Station Using AutoBase Technology. The receiver is configured step-by-step to ensure that all appropriate settings are configured. To move between steps in the configuration process, press L .

6 Configuring the SPSx50 Using the Keypad and Display62 SPSx50 Modular GPS Receiver User GuideConfiguring the receiver1. In the Home screen, press L . Use the Operation Mode screen to configure system settings, mode settings, or to view the SV (satellite) status. Mode Settings is the default setting.2. Press L . Use the Mode screen to select whether the receiver will operate as a base or rover. Base is the default setting.3. Press L . Use the Base Station screen to select whether the receiver is going to use a “Here” position or if the current coordinates in the receiver will be changed.4. Press G . When Edit Current begins to flash, the receiver is in Edit mode and you can change the current setting.5. Press K . The setting changes to New Base (Here).6. Press L to accept the change.7. Press L again. The Base Name screen appears. See next.Changing the name and description of the base stationIn the Base Name screen:1. Press G . When the first character of the base name begins to flash, the receiver is in Edit mode and you can change the current setting.2. Press J or K  to change the value of the character.3. Press G to move the cursor to the next character.4. Repeat Step 2 through Step 3 to enter the name of the base station. The name can be up to 16 characters. Press L to accept the change.5. Press L again. Use the Base Code screen to change the code (description) for the base station.6. Press G . When the first character of the base code begins to flash, the receiver is in Edit mode and you can change the current setting.7. Press J or K  to change the value of the character.8. Press G to move the cursor to the next character.9. Repeat Step 7 through Step 8 to enter the code of the base station. The code can be up to 16 characters. 10. Press L to accept the change.11. Press L again. The Base Latitude screen appears. See next.

SPSx50 Modular GPS Receiver User Guide 63Configuring the SPSx50 Using the Keypad and Display 6Setting the reference latitude, longitude, and height of the base stationIn the Base Latitude screen:1. The base was set up with a “Here” position, so press L . 2. The Base Longitude screen is used to change the reference longitude of the base station. The base was set up with a “Here” position, so press L . 3. The Point Height screen is used to change the reference height of the base station. The base was set up with a “Here” position, so press L . 4. Use the Antenna Type screen to select the type of antenna used with the receiver. Press G . When the antenna name begins to flash, the receiver is in Edit mode and you can select an antenna.5. Press K  to scroll through the antenna models. 6. Once the correct antenna name appears, press L to accept the change.7. Press L again. The Measured To screen appears. See next.Measuring and changing the antenna heightIn the Measured To screen:1. Press G . When the antenna measurement method begins to flash, the receiver is in Edit mode and you can select an antenna measurement method.2. Press K  to scroll through the measurement methods. Once the correct measurement method appears, press L to accept the change.3. Press L . 4. Use the Antenna Height screen to change the height of the antenna. Press L . When the first character of the antenna height begins to flash, the receiver is in Edit mode and you can change the antenna height.5. Press J or K  to change the value of the character.6. Press G to move the cursor to the next character.7. Repeat Step 5 through Step 6 to enter the height of the antenna.8. Press L to accept the change.9. Press L again. The Output screen appears. See next.Outputting correctionsIn the Output screen:1. Press G to enter Edit mode for the port.2. Press J or K  to change which port will be used to output corrections.3. Press L to accept the change.4. Press K  to move the cursor to the Format field.

6 Configuring the SPSx50 Using the Keypad and Display64 SPSx50 Modular GPS Receiver User Guide5. Press G to enter Edit mode for the format.6. Press J or K  to change which correction message will be output on the port.7. Press L to accept the change.8. Press L again. 9. Use the NMEA screen to set up NMEA outputs from the receiver. Press L to accept the default of no NMEA messages. 10. Use the GSOF screen to set up GSOF outputs from the receiver. Press L to accept the default of no GSOF messages. 11. Use the RT17 screen to set up RT17 outputs from the receiver. Press L to accept the default of no RT17 messages. The Home screen appears and the base setup is complete. Configuring the SPSx50 as a rover receiverYou can use the Trimble SCS900 Site Controller software or the receiver keypad to set up the SPSx50 base receiver. The receiver is configured step by step to ensure that all appropriate settings are configured. To move between steps in the configuration process, press L .Configuring the receiver 1. In the Home screen, press L . Use the Operation Mode screen to configure system settings, mode settings, or to view the SV (satellite) status. Mode Settings is the default setting.2. Press L . Use the Mode screen to select whether the receiver will operate as a base or rover.3. Press G . When the mode begins to flash, the receiver is in Edit mode and you can change this setting.4. Press K  to change to Rover.5. Press L to accept the change.6. Press L again to move to the Elevation mask and RTK mode screen. See next.Changing the elevation mask and RTK mode1. Press G . When the value for the current elevation mask begins to flash, the receiver is in Edit mode and you can change the setting.2. Press K  to change the elevation mask to the required value.Note – Trimble recommends that you do not set the elevation mask to a value lower than 10 degrees.3. Press L to accept the change.

SPSx50 Modular GPS Receiver User Guide 65Configuring the SPSx50 Using the Keypad and Display 64. Press K .5. In the Mode field, press G . When the current mode begins to flash, the receiver is in Edit mode and you can change this setting.6. Press K  to change the desired RTK mode of the receiver.7. Press L to accept the change.8. Press L again. The Antenna Type screen appears. See next.Selecting the antennaIn the Antenna Type screen:1. Press G . When the antenna name begins to flash, the receiver is in Edit mode and you can select the type of antenna that is to be used with the receiver.2. Press K  to scroll through the antenna models.3. Once the correct antenna name appears, press L to accept the change.4. Press L again. The NMEA screen appears. See next.Outputting correctionsIn the NMEA screen, set up outputs from the receiver:1. Press L to accept the default of no NMEA messages. 2. Use the GSOF screen to set up GSOF outputs from the receiver. Press L to accept the default of no GSOF messages.3. Use the RT17 screen to set up RT17 outputs from the receiver. Press L to accept the default of no RT17 messages. The Home screen appears, and the base setup is complete.Configuring system settingsYou can use the keypad and display of the SPSx50 receiver to configure the following receiver settings:•Display language•Display and input units•Baud rate, parity, data bits, and stop bits for serial ports•Display power saver•AutoBase warning

6 Configuring the SPSx50 Using the Keypad and Display66 SPSx50 Modular GPS Receiver User GuideTo access the system settings:1. In the Home screen, press L . Use the Operation Mode screen to configure system settings or mode settings, and to view the SV (satellite) status. Mode Settings is the default setting.2. Press G . When the operation mode begins to flash, the receiver is in Edit mode and you can change this setting.3. Press K  to change to System Setup. 4. Press L to accept the change.5. Press L again. 6. Use the Display Language screen, if necessary, to change the language. Choose English, French, German, Italian, or Spanish. Press L to accept the change.7. Press L again. Use the Display and Input Units screen, if necessary, to change the units to Meters or Feet. 8. Press L to accept the change.9. Press L again. Use the Port Settings screen, if necessary, to change the port.10. Press L to accept the change.11. Press L again. Use the Screen Pwr Savr screen to choose On, Off, or Auto. If you use the Auto setting, the screen turns off after 60 seconds of inactivity. The Power LED remains lit so that you can tell if the receiver is on or off. If an error message appears, the screen comes back on. Press L to accept the change and then press L again to move to the next screen.12. If you are using an SPS750 or SPS850, the Autobase warning screen appears. See Chapter 8, Automatically Setting up a Mobile Base Station Using AutoBase Technolog y. 13. Press L to accept the change.14. Press L again. When the Home screen appears, the system setup is complete.

CHAPTER7SPSx50 Modular GPS Receiver User Guide 67Configuring the Receiver Settings 7In this chapter:QUsing the SCS900 Site Controller software to configure the base station, the rover, and the radiosQConfiguring the receiver to log data for postprocessingQConfiguring Ethernet settingsQConfiguring the SPSx50 receiver using a web browserYou can configure the SPS GPS receiver family in a variety of ways. This chapter describes the different configuration methods, and explains when and why each method is used.The SCS900 Site Controller software is likely to be your main tool to set up and operate the receiver on a daily basis. All necessary field configurations are handled through the SCS900 software running on a TSC2 or TCU controller. For more information, refer to the Trimble SCS900 Site Controller Software Getting Started Guide or the Trimble SCS900 Site Controller Software Office Guide.The external software detailed in this chapter is primarily used to update the receiver firmware and to configure upgrades or radio channels.

7 Configuring the Receiver Settings68 SPSx50 Modular GPS Receiver User GuideUsing the SCS900 Site Controller software to configure the base station, the rover, and the radios As part of a total system solution for construction applications, the SPS GPS receivers are operated by a TSCe, ACU, TCU, or TSC2 controller running the SCS900 Site Controller software. The SCS900 Site Controller software provides the tools to configure and start the GPS receiver in the modes used by the SCS900 system: Base Station, RTK Rover, DGPS Rover, OmniSTAR rover, SBAS Rover (using WAAS/EGNOS and MSAS). Wizards help you through the process and, where possible, assign suitable default operational parameters to the system. This eliminates the need for an operator to know how to configure the receiver with the right settings.The SCS900 Site Controller software manages:•the radio, whether internal or external•all cellular communications components, such as modems and cellphones•the use of the Bluetooth wireless technologyThe software also scans communication ports on the receiver to identify connected devices. If the software cannot automatically identify the connected component, for example, a GPS antenna, it offers options (often with graphics) to help you manually select the correct component.The SCS900 Site Controller software allows you to set operational tolerances and settings (such as those shown below), which must be achieved before measurements can be accepted. When outside of these tolerances, the SCS900 Site Controller software warns you through on-screen messages or indications, and the non-automatic acceptance of recorded positions. To set operational tolerances, go to the the Settings menu in the SCS900 Site Controller software.Example 2: Use the Sky Plot screen toExample 1: From the Sky Plot screen, press Ctrl+M to open this screen and change the anglebelow which the receiver will not track satellitesset if the receiver will track GLONASS satellites

SPSx50 Modular GPS Receiver User Guide 69Configuring the Receiver Settings 7Configuring the receiver to log data for postprocessing The SPS GPS receivers do not come equipped with the Data Logging option. The receivers can have this added either at the time of purchase, or at a later date as an option. With the Data Logging option enabled, the receiver has available memory that facilitates the collection of GPS observations over a period of time, and that can be used with GPS postprocessing software such as the Trimble Geomatics Office™ for the computation of control networks and baselines.Note – The SCS900 system does not support postprocessed applications. Trimble recommends that you use either the front panel keypad and display, the Web User Interface, or (SPS770, SPSx80 only) the GPS Configurator software to configure the receiver for postprocessed measurement sessions. Configuring Ethernet settingsThe SPSx50 receiver has an Ethernet port so that the receiver can connect to an Ethernet network. You can use the Ethernet network to access, configure, and monitor the receiver. No serial cable connection to the receiver is necessary. The SPSx50 receiver requires the following Ethernet settings:•IP setup: Static or DHCP•IP address•Netmask•Broadcast•Gateway•DNS address•HTTP portThe default setting for the HTTP port is 80. The HTTP port is not assigned by the network. HTTP port 80 is the standard port for web servers. This allows you to connect to the receiver by entering only the IP address of the receiver in a web browser. If the SPSx50 receiver is set up to use a port other than 80, you will need to enter the IP address followed by the port number in a web browser. Example of connecting to the receiver using port 80: http://169.254.1.0Example of connecting to the receiver using port 4000: http://169.254.1.0:4000The default setting of the SPSx50 receiver is to use DHCP. Using DHCP enables the receiver to obtain the IP address, Netmask, Broadcast, Gateway, and DNS address from the network.

7 Configuring the Receiver Settings70 SPSx50 Modular GPS Receiver User GuideWhen an SPSx50 receiver is connected to a network using DHCP, an IP address is assigned to the receiver by the network. To verify the IP address of the receiver, select the up button from the keypad when the Home screen is displayed. The Ethernet IP address appears as shown.If your network installation requires the receiver to be configured with a static IP address, you can configure the Ethernet settings using the web server or the WinFlash utility. The web server can be only used when the receiver is connected to a network and has a valid Ethernet configuration.Use the WinFlash utility to configure the Ethernet settings of a receiver that is to be connected to a network that requires static IP addresses:1. Contact the network administrator for the correct settings for the SPSx50 receiver.2. Connect the SPSx50 receiver to a computer running the WinFlash utility using the serial cable provided with the receiver.3. Turn on the SPSx50 receiver.4. On the computer, start the WinFlash utility.5. From the Device Configuration screen, select Trimble SPSx50 Receiver. From the PC serial port list, select the appropriate PC serial port. Click Next:

SPSx50 Modular GPS Receiver User Guide 71Configuring the Receiver Settings 76. From the Operation Selection screen, select Configure ethernet settings, and then click Next:7. From the Settings Review screen, click Finish:Once the WinFlash utility connects to the receiver, the Ethernet Configuration dialog appears.

7 Configuring the Receiver Settings72 SPSx50 Modular GPS Receiver User Guide8. Enter the network settings in the Ethernet Configuration dialog. Click OK:The Broadcast setting is the IP address that is used to broadcast to all devices on the subnet. This is usually the highest address (usually 255) in the subnet.Configuring the SPSx50 receiver using a web browserThe SPSx50 receiver can be configured using the keypad and display, Trimble SCS900 Site Controller software, or a web browser. This section describes how to set up the receiver using a web browser. Supported browsers •Mozilla Firefox version 1.07 or later (version 1.50 is recommended for Windows, Macintosh, and Linux operating systems)•Microsoft Internet Explorer version 6.00 or later for Windows operating systems

SPSx50 Modular GPS Receiver User Guide 73Configuring the Receiver Settings 7To connect to the receiver using a web browser:1. Enter the IP address of the receiver into the address bar of the web browser as shown:2. If security is enabled on the receiver, the web browser prompts you to enter a username and password: The default login values for the SPSx50 receiver are:– User Name: admin– Password: passwordIf you cannot connect to the receiver, the password for the root account may have been changed, or a different account may be being used. Contact your receiver administrator for the appropriate login information.

7 Configuring the Receiver Settings74 SPSx50 Modular GPS Receiver User GuideOnce you are logged in, the welcome web page (see Figure 7.1) appears.Figure 7.1 SPS GPS receiver Home webpageChanging the settingsUse the webpage to configure the receiver settings. The web interface shows the configuration menus on the left of the browser window, and the settings on the right. Each configuration menu contains related submenus to configure the receiver and monitor receiver performance.Note – The configuration menus available vary based on the version of the SPSx50 receiver.A summary of each configuration menu is provided here. For more detailed information about each of the receiver settings, select the Help menu.To display the web interface in another language, click the corresponding country flag. The web interface is available in the following languages:•English •Italian•German •Russian•French •Chinese•Spanish •JapaneseModel name of receiverSerial number of receiverMenusAvailablelanguages

SPSx50 Modular GPS Receiver User Guide 75Configuring the Receiver Settings 7Receiver Status menuThe Receiver Status menu provides a quick link to review the receiver’s available options, current firmware version, IP address, temperature, runtime, satellites tracked, current outputs, available memory, position information, and more.This figure shows an example of the screen that appears when you select Receiver Status / Identity.

7 Configuring the Receiver Settings76 SPSx50 Modular GPS Receiver User GuideSatellites menuUse the Satellites menu to view satellite tracking details and enable/disable GPS, GLONASS, and SBAS (WAAS/EGNOS and MSAS) satellites. Note – To configure the receiver for OmniSTAR, use the OmniSTAR menu. See page 82.This figure shows an example of the screen that appears when you select Satellite / Tracking (Sky Plot).

SPSx50 Modular GPS Receiver User Guide 77Configuring the Receiver Settings 7Data Logging menuUse the Data Logging menu to set up the SPSx50 receiver to log static GPS data. This menu is available only if the receiver has the Data Logging option enabled. You can also configure settings such as observable rate, position rate, continuous logging, continuous logging rate, and whether to auto delete old files if memory is low.This figure shows an example of the screen that appears when you select Data Logging / Configuration.

7 Configuring the Receiver Settings78 SPSx50 Modular GPS Receiver User GuideReceiver Configuration menuUse the Receiver Configuration menu to configure such settings as elevation mask and PDOP mask, the antenna type and height, the reference station position, and the reference station name and code.This figure shows an example of the screen that appears when you select Receiver Configuration / Summary.

SPSx50 Modular GPS Receiver User Guide 79Configuring the Receiver Settings 7I/O Configuration menuUse the I/O Configuration menu to set up all outputs of the SPSx50 receiver. The receiver can output CMR, RTCM, NMEA, GSOF, RT17, or BINEX messages. These messages can be output on TCP/IP, UDP, serial, Bluetooth, or radio ports.This figure shows an example of the screen that appears when you select I/O Configuration / Port Summary.

7 Configuring the Receiver Settings80 SPSx50 Modular GPS Receiver User GuideBluetooth menuUse the Bluetooth menu to configure the receiver to connect to other Trimble devices that use Bluetooth wireless technology. These devices can be used to configure the receiver, and generate or receive corrections. The following Trimble devices can be connected to the SPSx50 receiver using Bluetooth wireless technology:•TSC2 controller•TCU controller•TSCe controller•ACU controller•SNB900 radio-modem•Other Bluetooth-enabled SPS GPS receiversThis figure shows an example of the screen that appears when you select Bluetooth / Info.

SPSx50 Modular GPS Receiver User Guide 81Configuring the Receiver Settings 7Radio menuUse the Radio menu to configure the internal radio of the receiver, if applicable. The SPSx50 receivers are available with 410–430 MHz, 430–450 MHz, 450–470 MHz, or 900 MHz radios. The SPS550H receiver does not have an internal radio.This figure shows an example of the screen that appears when you select Radio.

7 Configuring the Receiver Settings82 SPSx50 Modular GPS Receiver User GuideOmniSTAR menuAll SPSx50 receivers, except the SPS550H, can receive OmniSTAR corrections. By default, OmniSTAR tracking is turned on in the receiver. To receive OmniSTAR corrections, you must set the receiver to track OmniSTAR satellites and it must have a valid OmniSTAR subscription. The receiver can position with OmniSTAR XP or HP. To purchase a subscription for your receiver, contact OmniSTAR at:www.OmniSTAR.comNorth & South America, 1-888-883-8476 or 1-713-785-5850Europe & Northern Africa, 31-70-317-0900Australia & Asia, 61-8-9322 5295Southern Africa, 27 21 552 0535This figure shows an example of the screen that appears when you select OmniSTAR / Configuration.

SPSx50 Modular GPS Receiver User Guide 83Configuring the Receiver Settings 7Internet Configuration menuUse the Internet Configuration menu to configure Ethernet settings, e-mail alerts, PPP connection, HTTP port, FTP port, and VFD port settings of the receiver. For information on the Ethernet settings, see Configuring Ethernet settings, page 69.The VFD port allows you to use the SPSx50 Remote Control application to view and navigate the SPSx50 receiver through a mock display and keypad interface. To allow the SPSx50 Remote Control to connect to the receiver, you need to enable the VFD port. To do this, select Internet Configuration / VFD.This figure shows an example of the screen that appears when you select Internet Configuration / Ethernet.

7 Configuring the Receiver Settings84 SPSx50 Modular GPS Receiver User GuideSecurity menuUse the Security menu to configure the login accounts for all users who will be permitted to configure the SPSx50 receiver using a web browser. Each account consists of a username, password, and permissions. Administrators can use this feature to limit access to other users. Security can be disabled for a receiver. However, Trimble discourages this as it makes the receiver susceptible to unauthorized configuration changes.This figure shows an example of the screen that appears when you select Security / Configuration.

SPSx50 Modular GPS Receiver User Guide 85Configuring the Receiver Settings 7Firmware menuUse the Firmware menu to verify the current firmware and load new firmware to the SPSx50 receiver. You can upgrade firmware across a network or from a remote location without having to connect to the receiver with a serial cable.This figure shows an example of the screen that appears when you select Firmware.

7 Configuring the Receiver Settings86 SPSx50 Modular GPS Receiver User GuideHelp MenuThe Help menu provides information on each of the receiver settings available in a web browser. Selecting the Help menu opens new windows. Select the section of the Help that you want to view. The Help files are stored on the Trimble Internet site and are updated between firmware releases. If you do not have access to the Internet, there is also a copy of the receiver Help files on the Trimble SPS GPS Receiver CD. (This copy shows the Help files as they were when the CD was published).This figure shows an example of the screen that appears when you select Help.

CHAPTER8SPSx50 Modular GPS Receiver User Guide 87Automatically Setting up a Mobile Base Station Using AutoBase Technology 8In this chapter:QAutoBase WarningQWorking with AutoBase technologyQScenario One: First visit to a site with AutoBase Warning turned offQScenario Two: First visit to a site with AutoBase Warning turned onQScenario Three: Repeat visit to a site with AutoBase Warning turned offQScenario Four: Repeat visit to a site with AutoBase Warning turned onQFlowchart showing the AutoBase processThe AutoBase technology is a feature of the Trimble SPSx50 receivers that enables you to reduce daily setup time for mobile base stations and to reduce the likelihood of using incorrect base station coordinates during setup. The AutoBase feature allows you to set up a SPSx50 receiver as a base station receiver and save you time so you do not need to reconfigure the receiver at the start of each day. It also allows you to set up the base station on a new site without needing to configure the settings in the receiver.Even if you have used the AutoBase feature in other Trimble receivers, Trimble recommends that you read this chapter carefully because new functions in this feature provide greater benefit to you.

8 Automatically Setting up a Mobile Base Station Using AutoBase Technology88 SPSx50 Modular GPS Receiver User GuideAutoBase WarningThe AutoBase Warning, when enabled, prevents the receiver from creating a new base station position and begin operating as an RTK base station when no previous base station position exists that corresponds to the current position of the receiver. When the AutoBase Warning is on, the receiver will not begin transmitting RTK corrections from a base position (latitude, longitude, and height) that is not a part of the GPS site calibration. When the AutoBase Warning is off, the receiver begins transmitting RTK corrections from a new base position. You need only turn on the receiver the first time on a point, and you do not need to manually configure the base station settings.By default, the SPSx50 receivers have the AutoBase Warning turned on. The receiver uses the AutoBase Warning setting to control how the receiver performs when different criteria are met. You can turn the AutoBase Warning on or off using the keypad and display. For more information, see Configuring system settings, page 65.Working with AutoBase technologyThis section contains some example scenarios. In each section, there is a step-by-step process that explains what you will experience in each scenerio.Scenario One: First visit to a site with AutoBase Warning turned offThe following actions occur when you set up the base station for the first time on a new point and the AutoBase Warning is turned off:1. Turn on the receiver.2. The receiver begins tracking satellites.3. The receiver determines the current position.4. The receiver reviews the previous base station positions stored in the receiver.5. The receiver does not find any base station that corresponds to the current position.6. The receiver creates a new base station location for the current location.7. The receiver sets the antenna height to 0. The antenna height is measured to the antenna phase center.CCAUTION – On each reoccupation of the point, you must ensure that the receiver antenna is set up in exactly the same location and at exactly the same height. Trimble also recommends that you use a T-bar or Fixed height tripod so that the position is easy to re-establish. Failure to achieve the same height position for the antenna results in errors in heights in subsequent measurements.

SPSx50 Modular GPS Receiver User Guide 89Automatically Setting up a Mobile Base Station Using AutoBase Technology 8Where you set up each time with potentially different antenna heights, Trimble recommends that on the first setup after AutoBase has completed its process, that you edit the antenna height (using the receiver keypad and display). The updated antenna height changes the AutoBase setup, so that on subsequent setups, when you again change the antenna height, you will get correct height information during measurement. At the first setup, Trimble recommends that you change the AutoBase setup and antenna height before you carry out a site calibration.8. The receiver begins generating RTK CMR+ corrections.9. The RTK corrections begin streaming over the internal radio. If there is no internal radio, the receiver defaults to streaming the corrections on the Lemo port.Scenario Two: First visit to a site with AutoBase Warning turned onThe following actions occur when you set up the base station for the first time on a point, and the AutoBase Warning is turned on:1. Turn on the receiver.2. The receiver begins tracking satellites.3. The receiver determines the current position.4. The receiver reviews the base positions stored in the receiver.5. The receiver does not find any base station that corresponds to the current position.6. The receiver displays a warning that AutoBase has failed.7. No RTK corrections are streamed until the base station is set up using the keypad and display or an SCS900 controller.Scenario Three: Repeat visit to a site with AutoBase Warning turned offThe following actions occur when you repeat a base station setup on a point, and the AutoBase Warning is turned off:1. Turn on the receiver.2. The receiver begins tracking satellites.3. The receiver determines the current position.4. The receiver reviews the base station positions stored in the receiver.5. The receiver finds a base station position that corresponds to the current position.6. The receiver loads the previous base information.

8 Automatically Setting up a Mobile Base Station Using AutoBase Technology90 SPSx50 Modular GPS Receiver User Guide7. The antenna type, antenna height and measurement method used in the previous setup of this base station are applied.CCAUTION – If the antenna height is different to the previous setup, then you must enter the corrected height for the antenna (using the keypad and display) before starting measurements. Failure to achieve the correct antenna height position for the antenna results in errors in heights in subsequent measurements. 8. The receiver begins generating RTK CMR+ corrections.9. The RTK corrections begin streaming on the radio or port defined in the application file.Scenario Four: Repeat visit to a site with AutoBase Warning turned onThe following actions occur when you repeat a base station setup on a point, and the AutoBase Warning is turned on:1. Turn on the receiver.2. The receiver begins tracking satellites.3. The receiver determines the current position.4. The receiver reviews the base station positions stored in the receiver.5. The receiver finds a base station position that corresponds to the current position.6. Since a base station position is found, the AutoBase warning does not appear.7. The receiver loads the previous base information.8. The antenna type, antenna height, and measurement method used in the previous setup of this base station are applied.CCAUTION – If the antenna height is different from the previous setup, then you must enter the corrected height for the antenna (using the keypad and display) before starting measurements. Failure to achieve the correct antenna height position for the antenna results in errors in heights in subsequent measurements.9. The receiver begins generating RTK CMR+ corrections.10. The RTK corrections begin streaming on the radio or port defined in the previous setup of this base station.Note – Autobase recalls base station positions that are stored in the receiver. If the receiver has been previously set up on a control point but the stored base station position is not found in the receiver, it is possible that the information may have accidently been deleted. In this case, use the display and keypad or the SCS900 system to manually set up the base station. Make sure that you use the same base station latitude, longitude, and height as in the previous setup otherwise you will experience position or height errors in all subsequent measurements.

SPSx50 Modular GPS Receiver User Guide 91Automatically Setting up a Mobile Base Station Using AutoBase Technology 8Trimble recommends that after any new base station setup, or at the start of each measurement session, you measure a known point to verify that position and height errors are within tolerance. This is good practice and it takes just a few seconds to eliminate potentially gross errors typically associated with repeated daily base station setups.Flowchart showing the AutoBase processFigure 8.1 shows the AutoBase process. Figure 8.1 Autobase featureOnDisplay AutoBase WarningNoIs AutoBase Warning On or Off?Create new application fileSave new application file with “Auto” base nameMake new “Auto” application file activePower OnReceiverReceiver looks for application filesDo application files exist?OffNoYe sAny application file that corresponds with the current position?NoYe sYe sMake most recently created application activeMake corresponding applicationfile activeIs there more than one acceptable application file?

8 Automatically Setting up a Mobile Base Station Using AutoBase Technology92 SPSx50 Modular GPS Receiver User Guide

CHAPTER9SPSx50 Modular GPS Receiver User Guide 93Default Settings 9In this chapter:QDefault receiver settingsQResetting the receiver to factory defaultsQData Logging optionAll settings are stored in application files. The default application file, Default.cfg, is stored permanently in the receiver, and contains the factory default settings for the SPSx50. Whenever the receiver is reset to its factory defaults, the current settings (stored in the current application file, Current.cfg) are reset to the values in the default application file.

9 Default Settings94 SPSx50 Modular GPS Receiver User GuideDefault receiver settingsThese settings are defined in the default application file. Resetting the receiver to factory defaultsTo reset the receiver to its factory defaults, press E for 35 seconds.Data Logging optionBy default, the Data Logging option is turned off in SPS GPS receivers. If you choose to log data using a GPS receiver, you must enable the option and acquire suitable GPS postprocessing software, such as the Trimble Geomatics Office software. For more information, please contact your Trimble dealer.Postprocessed GPS data is typically used for control network measurement applications and precise monitoring. GPS measurement data is collected over a period of time at a static point or points and then postprocessed to accurately compute baseline information. Function Factory defaultSV Enable All SVs enabledGeneral Controls: Elevation mask 10°PDOP mask 7RTK positioning mode Low LatencyMotion KinematicLemo Port: Baud rate 38,400Format 8-None-1Flow control NoneModem Port: Baud rate 38,400Format 8-None-1Flow control NoneInput Setup: Station AnyNMEA/ASCII (all supported messages) All ports OffStreamed output All types OffOffset = 00RT17/Binary All ports OffReference position: Latitude 0°Longitude 0°Altitude 0.00 m HAE (Height above ellipsoid)Antenna: Type Zephyr Geodetic Model 2Height (true vertical) 0.00 mMeasurement method True vertical

SPSx50 Modular GPS Receiver User Guide 95Default Settings 9Logging data after a power lossIf power is unexpectedly lost while the receiver is logging data, once power is restored, the receiver tries to return to the state it was in immediately before the power loss. The receiver does not reset itself to default settings.If the receiver was logging data when power was lost, data logging is not resumed. To resume data logging after a power loss:1. Restart the receiver. When power is cycled on the receiver, the receiver will turn on but with data logging off. 2. Use the web browser or the keypad and display to turn data logging back on.

9 Default Settings96 SPSx50 Modular GPS Receiver User Guide

CHAPTER10SPSx50 Modular GPS Receiver User Guide 97Specifications 10In this chapter:QGeneral specificationsQPhysical specificationsQElectrical specificationsQCommunication specificationsQGPS satellite signal trackingQIntegrated radio optionsQVariable configuration optionsThis chapter details the specifications for the SPSx50 GPS receiver.Specifications are subject to change without notice.

10 Specifications98 SPSx50 Modular GPS Receiver User GuideGeneral specificationsPhysical specificationsFeature SpecificationKeyboard and display VFD display 16 characters by 2 rowsOn/Off key for one button startup using AutoBase technologyEscape and Enter key for menu navigation4 arrow keys (up, down, left, right) for option scrolls and data entryReceiver type Modular GPS receiverAntenna type Base station RoverZephyr Geodetic Model 2Zephyr Model 2Also supports legacy antennas Zephyr, Zephyr Geodetic, Micro-Centered™, Choke ring, Rugged Micro-Centered.Feature SpecificationDimensions (LxWxH) 24 cm (9.4 in) x 12 cm (4.7 in) x 5 cm (1.9 in) including connectorsWeight 1.65 kg (3.64 lbs) receiver with internal battery and radio1.55 kg (3.42 lbs) receiver with internal battery and no radioTemperature1OperatingStorage–40 °C to +65 °C (–40 °F to +149 °F)–40 °C to +80 °C (–40 °F to +176 °F)Humidity 100%, condensingWaterproof IP67 for submersion to depth of 1 m (3.28 ft)Shock and vibrationShock, non operatingShock, operatingVibrationTested and meets the following environmental standards:Designed to survive a 2 m (6.6 ft) pole drop onto concreteMIL-STD-810F, Fig.514.5C-17To 40 G, 10 msec, saw-toothMIL-STD-810F, FIG.514.5C-17Measurements • Advanced Trimble Maxwell™ Custom GPS chip• L2C Civil signal and L5 signal for GPS modernization (SPS850 Extreme only)• Very low noise L1, L2, and L5 carrier phase measurements with <1 mm precision in a 1 Hz bandwidth• Proven Trimble low elevation tracking technology• 72 Channels L1 C/A Code, L2C, L5C, L1/L2/L5 Full Cycle Carrier, GLONASS L1/L2 (L2C, L5 and GLONASS L1/L2 tracking capability available only in the SPS850 Extreme only)• WAAS/EGNOS, and MSASCode differential GPS positioning2Horizontal accuracyVertical accuracyWAAS/EGNOS, and MSASHorizontal accuracy3Vertical accuracy2±(0.25 m + 1 ppm) RMS, ± (9.84 in + 1 ppm) RMS±(0.50 m + 1 ppm) RMS, ± (19.68 in + 1 ppm) RMSTypically <1 m (3.28 ft)Typically <5 m (16.40 ft)

SPSx50 Modular GPS Receiver User Guide 99Specifications 10OmniSTAR PositioningXP Service AccuracyHP Service AccuracyHorizontal 20 cm (7.87 in), Vertical 30 cm (11.80 in)Horizontal 10 cm (3.93 in), Vertical 15 cm (5.90 in)Real Time Kinematic (RTK) positioningHorizontalVerticalInitialization timeRegular RTK operation with base stationRTK operation with Scalable GPS infrastructureInitialization reliability4±(10 mm + 1 ppm) RMS, ± (0.38 in +1 ppm) RMS±(20 mm + 1 ppm) RMS, ± (0.78 in +1 ppm) RMSSingle/Multi-base minimum 10 sec + 0.5 times baseline length in km, <30 km<30 seconds typical anywhere within coverage areaTypically >99.9%1 Receiver will operate normally to –40 °C. Bluetooth module and internal batteries are rated to –20 °C.2 Accuracy and reliability may be subject to anomalies such as multipath, obstructions, satellite geometry, and atmospheric conditions. Always follow recommended practices.3 Depends on WAAS/EGNOS, and MSAS system performance.4 May be affected by atmospheric conditions, signal multipath, and satellite geometry. Initialization reliability is continuously monitored to ensure highest qualityFeature Specification

10 Specifications100 SPSx50 Modular GPS Receiver User GuideElectrical specificationsFeature SpecificationPowerInternalExternalIntegrated internal battery 7.4 V, 7800 mA-hr, Lithium-ionInternal battery operates as a UPS in the event of external power source outageInternal battery will charge from external power source when input voltage is >15 VIntegrated charging circuitryPower input on Lemo 7P0S is optimized for lead acid batteries with a cut off threshold of 10.5 VPower input on the 26-pin DSub connector is optimized for Trimble Lithium-ion battery input (P/N 49400) with a cut-off threshold of 9 VPower source supply (Internal / External) is hot swap capable in the event of power source removal or cut-off9 V to 30 V DC external power input with over-voltage protectionReceiver will auto power on when connected to external power of 15 V or greaterPower consumption <6 W, in RTK rover mode with internal receive radio<8 W in RTK Base mode with internal transmit radioBase station operation times on internal batteryTypically 8–10 hours based on transmitter power, types of messages transmitted, and temperatureRover operation time on internal battery 450 MHz 900 MHz12 hours; varies with temperature12 hours; varies with temperatureBase station operation times on internal battery450 MHz900 MHz10 hours; varies with temperature10 hours; varies with temperatureCertification Part 15.247 and Part 90 FCC certifications Class B Device FCC Part 15 and ICES-003 certificationsRSS-310, RSS-210 and RSS-119 Industry Canada certifications ACMA AS/NZS 4295 approval CE mark compliance C-tick mark complianceUN ST/SG/AC.10.11/Rev. 3, Amend. 1 (Li-Ion Battery)UN ST/SG/AC. 10/27/Add. 2 (Li-Ion Battery)WEEE

SPSx50 Modular GPS Receiver User Guide 101Specifications 10Communication specificationsFeature SpecificationCommunicationsPort 1 (7-pin 0S Lemo)Port 2 (DSub 26-pin)Bluetooth3-wire RS-232 CANFull RS-232 (via multi-port adaptor)3-wire RS-232USB (On the Go)EthernetFully integrated, fully sealed 2.4 GHz Bluetooth11 Bluetooth type approvals are country specific. Contact your local Trimble office or representative for more information.Integrated radiosChannel spacing (450 MHz)Frequency approvals (900 MHz)450 MHz transmitter radio power output900 MHz transmitter radio power outputFully integrated, fully sealed internal 450 MHz, Tx, Rx, or Tx/RxFully integrated, fully sealed internal 900 MHz, Tx, Rx, or Tx/Rx12.5 KHz or 25 KHz spacing availableUSA (-10), Australia (-30), New Zealand (-20)0.5 W / 2.0 W (2 watt upgrade only available in certain countries)1.0 WExternal GSM/GPRS, cellular phone support Supported for direct dial and Internet-based VRS correction streamsCellular phone or GSM/GPRS modem inside TSC2 controllerReceiver position update rate 1 Hz, 2 Hz, 5 Hz, 10 Hz, and 20 Hz positioning (varies by receiver model)Data Input and Output CMR, CMR+, RTCM 2.0, RTCM 2.1, RTCM 2.3, RTCM 3.0 Outputs NMEA, GSOF, and RT17

10 Specifications102 SPSx50 Modular GPS Receiver User GuideGPS satellite signal trackingThis table shows the GPS satellite signal tracking capability for each receiver in the SPSx50 Modular GPS receiver family.Integrated radio optionsExcept for the SPS550H, all the receiver configurations are available with or without internal radios with 450 MHz or 900 MHz frequency ranges. The SPS550H is not available with a radio. This table shows the radio options available for each receiver type in the SPSx50 Modular GPS receiver family.GPS signal type Class SPS550 SPS550H SPS750 Basic baseSPS750 Basic roverSPS750 MaxSPS850 ExtremeGPS signals L1/L2 999 9 9 9L2C 88 8 8 8 9L5 88 8 8 8 9GLONASS signals L1/L2 88 8 8 8 9GPS SBAS corrections WAAS 99 9 9 9 9EGNOS 99 9 9 9 9MSAS 99 9 9 9 9OmniSTAR correctionsXP 98 9 9 9 9HP 98 9 9 9 9Radio option SPS550 SPS550H SPS750 Basic baseSPS750 Basic roverSPS750 MaxSPS850 ExtremeNo radio 999999450 MHz Transmit 989 8 99450 MHz Receive 98 8 9 99900 MHz Transmit 989 8 99900 MHz Receive 98 8 9 99External 450 MHz Transmit Optional 8Optional Optional Optional OptionalExternal 900 MHz Transmit Optional 8Optional Optional Optional Optional

SPSx50 Modular GPS Receiver User Guide 103Specifications 10Variable configuration optionsThis table lists the default options for each receiver type in the SPSx50 Modular GPS receiver family.Upgrading the receiverYou can upgrade the SPS750 Basic base and SPS750 Basic rover to the SPS750 Max at any time. The upgrade changes all standard options to SPS750 Max capability, and includes the radio option upgrade. When you purchase the receiver upgrade, your Trimble dealer will provide you with a set of codes to change the receiver configuration. See also Appendix E, Upgrading the Receiver Firmware.The SPS550 and SPS750 Max receivers cannot be upgraded further.Radio option SPS550 SPS550H SPS750 Basic baseSPS750 Basic roverSPS750 MaxSPS850 ExtremeCMR inputs (Rover) 911Float solution only.922Moving base CMRs only.8999CMR outputs (Base) 933Moving base CMR output only.89 8 99RTCM inputs (Rover) 988 999RTCM outputs (DGPS Base) 889899Moving Base (Position/Heading) 99889910 Hz measurements 99889920 Hz measurements 888 8 89Data logging (postprocessed) 88Optional Optional Optional OptionalVRS capable 9Location GPS 89 8 99Internet/IP enabled 999 9 99RTK range limit None 2.4 km (1.5 miles)None 2.4 km (1.5 miles)None None

10 Specifications104 SPSx50 Modular GPS Receiver User Guide

APPENDIXASPSx50 Modular GPS Receiver User Guide 105NMEA-0183 Output AIn this appendix:QNMEA-0183 message overviewQCommon message elementsQNMEA messagesThis appendix describes the formats of the subset of NMEA-0183 messages that are available for output by the receivers. For a copy of the NMEA-0183 Standard, go to the National Marine Electronics Association website at www.nmea.org.

A NMEA-0183 Output106 SPSx50 Modular GPS Receiver User GuideNMEA-0183 message overviewWhen NMEA-0183 output is enabled, a subset of NMEA-0183 messages can be output to external instruments and equipment connected to the receiver serial ports. These NMEA-0183 messages let external devices use selected data collected or computed by the GPS receiver.All messages conform to the NMEA-0183 version 3.01 format. All begin with $ and end with a carriage return and a line feed. Data fields follow comma (,) delimiters and are variable in length. Null fields still follow comma (,) delimiters but contain no information.An asterisk (*) delimiter and checksum value follow the last field of data contained in an NMEA-0183 message. The checksum is the 8-bit exclusive of all characters in the message, including the commas between fields, but not including the $ and asterisk delimiters. The hexadecimal result is converted to two ASCII characters (0–9, A–F). The most significant character appears first.The following table summarizes the set of NMEA messages supported by the receiver, and shows the page that contains detailed information about each message. To enable or disable the output of individual NMEA messages, do one of the following:•Create an application file in the GPS Configurator software that contains NMEA output settings and then send the file to the receiver.•Add NMEA outputs in the Serial outputs tab of the GPS Configurator software and then apply the settings. (You cannot use the GPS Configuration software to load application files to the SPSx50 Modular GPS receivers.)•For SPSx50 Modular GPS receivers, set up the NMEA output using the keypad and display or a web browser.Message Function PageADV Position and Satellite information for RTK network operations 108GGA Time, position, and fix related data 109GSA GPS DOP and active satellites 110GST Position error statistics 111GSV Number of SVs in view, PRN, elevation, azimuth, and SNR 112HDT Heading from True North 113PTNL,AVR Time, yaw, tilt, range, mode, PDOP, and number of SVs for Moving Baseline RTK114PTNL,GGK Time, position, position type and DOP values 115PTNL,PJK Local coordinate position output 116PTNL,VGK Time, locator vector, type and DOP values 117PTNL,VHD Heading Information 118RMC Position, Velocity, and Time 119ROT Rate of turn 120VTG Actual track made good and speed over ground 121ZDA UTC day, month, and year, and local time zone offset 122

$SPSx50 Modular GPS Receiver User Guide 107NMEA-0183 Output ACommon message elementsEach message contains:•a message ID consisting of $GP followed by the message type. For example, the message ID of the GGA message is $GPGGA.•a comma•a number of fields, depending on the message type, separated by commas•an asterisk•a checksum valueBelow is an example of a simple message with a message ID ($GPGGA), followed by 13 fields and a checksum value:$GPGGA,172814.0,3723.46587704,N,12202.26957864,W,2,6,1.2,18.893,M,-25.669,M,2.0,0031*4FMessage valuesNMEA messages that the receiver generates contains the following values.Latitude and longitudeLatitude is represented as ddmm.mmmm and longitude is represented as dddmm.mmmm, where:•dd or ddd is degrees•mm.mmmm is minutes and decimal fractions of minutesDirectionDirection (north, south, east, or west) is represented by a single character: N, S, E, or W.TimeTime values are presented in Universal Time Coordinated (UTC) and are represented as hhmmss.cc, where:•hh is hours, from 00 through 23•mm is minutes•ss is seconds•cc is hundredths of secondsNMEA messagesWhen NMEA-0183 output is enabled, the following messages can be generated.$