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Analyzing Signal-to-Noise Ratio

P/N 7010-0935

3-27

Generally, single-frequency receivers are used for baselines with
lengths that do not exceed 15 kilometers (9.32 miles). For baselines of
15 kilometers or greater, use dual-frequency receivers.

Dual-frequency receivers have two major benefits. First, dual-
frequency receivers can estimate and remove almost all ionospheric
effect from the code and carrier phase measurements, providing much
greater accuracy than single-frequency receivers over long baselines
or during ionospheric storms. Secondly, dual-frequency receivers
need far less observation time to reach the desired accuracy
requirement.

After the survey completes, data the receivers collect can be
downloaded onto a computer and processed using post-processing
software (for example, Topcon Tools).

Analyzing Signal-to-Noise
Ratio

Knowing the strength and reliability of the ranging signal transmitted
from the satellites will help determine the quality of the satellite
signals. Use Table 3-4 to help estimate signal quality from a satellite
vehicle.

If the SNR value of a satellite signal is less than the threshold value
from the table, then pay close attention to this satellite because it can

Table 3-4. Typical SNR Values

SV

a

Elevation

(degrees)

a. SV = satellite vehicle

C/A channel

(dB*Hz)

P1 channel

(dB*Hz)

P2 channel

(dB*Hz)

10–20

>35

>10

>10

20–40

>40

>20

>20

40–60

>45

>30

>30

60–90

>50

>40

>40

Net-G3A_OM_Book.book Page 27 Thursday, May 14, 2009 8:49 AM

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Содержание Net-G3A

Страница 1: ... 4 PERATORlS ANUAL 2EFERENCE 3TATION 33 2ECEIVER Net G3A_OM_Book book Page 1 Thursday May 14 2009 8 49 AM ...

Страница 2: ...Net G3A_OM_Book book Page 2 Thursday May 14 2009 8 49 AM ...

Страница 3: ...ber 7010 0935 Rev A Copyright Topcon Positioning Systems Inc May 2009 All contents in this manual are copyrighted by Topcon All rights reserved The information contained herein may not be used accessed copied stored displayed sold modified published or distributed or otherwise reproduced without express written consent from Topcon Net G3A_OM_Book book Page 1 Thursday May 14 2009 8 49 AM ...

Страница 4: ...ECO 3568 Net G3A_OM_Book book Page 2 Thursday May 14 2009 8 49 AM ...

Страница 5: ... 16 Mounting Holes 1 18 Cables and Power Supply 1 18 Other Kit Accessories 1 20 Option Authorization File OAF 1 21 Chapter 2 Pre setup Preparation 2 1 Determining the Reference Station Site 2 2 Consider the Net G3A Reference Station Application 2 2 Perform a Site Inspection for the Net G3A Reference Station 2 3 Installing Topcon Software 2 5 Installing PC CDU 2 6 Installing FLoader 2 7 Installing ...

Страница 6: ...ver 3 2 MINTER Description and Configuration 3 9 MINTER Operation 3 16 Using the Web Interface 3 18 Accessing the Net G3A through the Web Interface 3 18 Understanding the Web Interface 3 20 Building an Antenna Cabling System 3 20 Receiver Setup as a Temporary Reference Station 3 21 Step 1 Set up the Receiver 3 22 Step 2 Measure Antenna Height 3 23 Step 3 Collect Data 3 25 Stopping Data Logging 3 2...

Страница 7: ...8 Using PC CDU to Clear the NVRAM 4 19 Changing Receiver Modes 4 19 Entering Extended Information Mode 4 19 Sleep Off Mode 4 21 Loading New Firmware 4 21 Chapter 5 Troubleshooting 5 1 Check This First 5 1 Troubleshooting Quick List 5 2 Powering Problems 5 2 Receiver Problems 5 3 Obtaining Customer Support 5 7 Phone 5 7 E mail 5 7 Website 5 8 Appendix A Specifications A 1 Net G3A Dimensions A 2 Rec...

Страница 8: ...equency Connector A 14 CF Cards Compatible with the Net G3A A 15 Appendix B Safety Warnings B 1 General Warnings B 1 Usage Warnings B 2 Appendix C Regulatory Information C 1 FCC Compliance C 1 Community of Europe Compliance C 2 WEEE Directive C 2 Appendix D Warranty Terms D 1 Net G3A_OM_Book book Page iv Thursday May 14 2009 8 49 AM ...

Страница 9: ...ty of and copyrighted material of TPS All rights are reserved You may not use access copy store display create derivative works of sell modify publish distribute or allow any third party access to any graphics content information or data in this Manual without TPS express written consent and may only use such information for the care and operation of your receiver The information and data in this ...

Страница 10: ...TION TPS IS NOT RESPONSIBLE OR LIABLE FOR DAMAGES OR COSTS INCURRED IN CONNECTION WITH OBTAINING SUBSTITUTE PRODUCTS OR SOFTWARE CLAIMS BY OTHERS INCONVENIENCE OR ANY OTHER COSTS IN ANY EVENT TPS SHALL HAVE NO LIABILITY FOR DAMAGES OR OTHERWISE TO YOU OR ANY OTHER PERSON OR ENTITY IN EXCESS OF THE PURCHASE PRICE FOR THE PRODUCT LICENSE AGREEMENT Use of any computer programs or software supplied by...

Страница 11: ...tiality Information confidential In the event you become legally compelled to disclose any of the Confidential Information you shall give TPS immediate notice so that it may seek a protective order or other appropriate remedy WEBSITE OTHER STATEMENTS No statement contained at the TPS website or any other website or in any other advertisements or TPS literature or made by an employee or independent...

Страница 12: ...maintenance or setup of a system TIP Supplementary information that can help you configure maintain or set up a system NOTICE Supplementary information that can have an affect on system operation system performance measurements or personal safety CAUTION Notification that an action has the potential to adversely affect system operation system performance data integrity or personal health WARNING N...

Страница 13: ...gnals improving the accuracy and reliability of the solution especially under difficult job site conditions The following features combine to provide a positioning system efficient secure and appropriate for any survey or application that requires highly accurate timing and positioning solutions GNSS Multiple frequency detection One Pulse Per Second 1PPS output and external event time tagging Exte...

Страница 14: ...and apply basic operating principles allowing you to get the most out of your receiver GNSS Overview Currently the following three global navigation satellite systems GNSS offer line of site radio navigation and positioning velocity and time services on a global all weather scale to any user equipped with a GNSS tracking receiver on or near the earth s surface GPS the Global Positioning System mai...

Страница 15: ...ese satellites broadcast ranging signals and various digital information ephemerides almanacs time frequency corrections etc Control Ground stations located around the earth that monitor the satellites and upload data including clock corrections and new ephemerides satellite positions as a function of time to ensure the satellites transmit data properly User The community and military that use GNS...

Страница 16: ...further divided according to the source of differential data and the communication link used With DGPS in its most traditional approach one receiver is placed at a known surveyed location and is referred to as the reference receiver or base station Another receiver is placed at an unknown location and is referred to as the remote receiver or rover receiver The reference station collects the code p...

Страница 17: ... is at an unknown location Rover The Base receiver collects carrier phase measurements generates RTK corrections and sends this data along with the coordinates of the reference station to the Rover receiver The Rover processes this transmitted data with its own carrier phase observations to compute its relative position with high accuracy achieving an RTK accuracy of up to 1 cm horizontal and 1 5 ...

Страница 18: ...e latest in GNSS capable technology This receiver provides greater value by virtue of its ability to keep up with changes in GNSS signal enhancements through simple firmware upgrades protecting your investment to the highest possible degree When power is turned on and the receiver self test is completed the receiver s 144 channels initialize and begin tracking visible satellites Each of the receiv...

Страница 19: ...lash memory or a UMS This allows the operator to double check real time results obtained in the field The Net G3A offers a unique collection of features and capabilities in a single design They include 144 universal tracking channels Multipath reduction Adjustable phase locked loop PLL and delay lock loop DLL parameters Anti jamming suppressor 1PPS and event marker External oscillator input GNSS d...

Страница 20: ...G3A Receiver The Net G3A receiver s advanced and feature packed design provides greater versatility reliability and efficiency to implement a cost effective and productive network infrastructure in a timely manner Managed with the GNSS Receiver Interface Language GRIL and equipped with various hardware interfaces this receiver offers unchallenged flexibility a 144 channel GNSS receiver four serial...

Страница 21: ...face used to display and control data input and output Figure 1 2 on page 1 10 The STAT LED displays the status of tracked satellites Red blink receiver is on but no satellites are being tracked Green blink receiver is on and tracking satellites one blink per tracked GPS satellite Orange blink receiver is on and tracking satellites one blink per tracked GLONASS satellite The LINK LED displays Ethe...

Страница 22: ...urce connected to the corresponding PWR port and this power is within an allowed operating voltage range 6 28 V DC but is not being used to power the receiver Solid Red A power failure has occurred with the connected power source or power is not supplied to the corresponding PWR port For details see Powering Problems on page 5 2 Green blinks plus red blinks The receiver accepts power from an exter...

Страница 23: ...ing This operation may require from fractions of a second to several minutes depending on the circumstances and the amount of memory on the CF card If the LED blinks orange every second this also indicates that raw data is being transferred to a UMS device Solid Red This indicates a fault condition with the receiver memory full no CF card installed a hardware problem or an improper OAF Table 1 1 o...

Страница 24: ...econd If FN key mode is LED blink mode switch Orange Release to change information mode If FN key mode is Occupation mode switch Orange No function Pressed for 1 5 seconds If FN key mode is LED blink mode switch Green Release to start data recording post processing occupation mode undefined If FN key mode is Occupation mode switch Green Release to start recording Kinematic or Static post processin...

Страница 25: ...atic post processing occupation mode Pressed for 1 second If FN key mode is LED blink mode switch Orange Release to change information mode If FN key mode is Occupation mode switch Orange Release to toggle between Static and Kinematic post processing modes Pressed for 1 5 seconds No light Release to stop data recording Pressed for 5 8 seconds Red Release to turn serial port A baud rate to 9600 bps...

Страница 26: ...unication between the receiver and an external device This is the receiver s serial port A Figure 1 3 Net G3A Front Panel Ports The back panel has the following 10 ports Figure 1 5 on page 1 16 Serial ports 9 pin D shell connector used for communication between the receiver and an external device FN STAT LINK PWR 1 REC RX TX PWR 2 Serial Port Net G3A_OM_Book book Page 14 Thursday May 14 2009 8 49 ...

Страница 27: ...Antenna port Type N connector used for detecting GNSS signals External Frequency port BNC connector used for an external frequency input or the receiver s internal frequency output Power ports 5 pin ODU MINI SNAP used to connect the receiver to an external power source USB Mini B used for high speed data transfer and communication between the receiver and an external device This port is located on...

Страница 28: ... Before using any other CF cards consult with Topcon customer support about compatibility See Obtaining Customer Support on page 5 7 The receiver recognizes up to 2 GB of memory The recognizable capacity is controlled through the corresponding receiver option Once installed the CF card usually remains inside the receiver The data that resides on the CF card can be accessed via the serial USB or Et...

Страница 29: ...e installed CF card before the first use The initialization procedure is described in Initializing File System on page 4 12 Figure 1 6 Net G3A CF Card Slot FN STAT LINK PWR 1 REC RX TX PWR 2 CF Card Slot Card Slot Button Net G3A_OM_Book book Page 17 Thursday May 14 2009 8 49 AM ...

Страница 30: ...e Net G3A package includes standard communication and power cables for configuring the receiver and providing a power source to the receiver Table 1 2 lists these cables Table 1 2 Net G3A Package Cables Cable Description Cable Illustration USB Cable Connects the receiver to an external device controller or computer for high speed data transfer and receiver configuration p n 14 008081 01 This can a...

Страница 31: ...cy In Out Cable Connects the receiver s 1PPS EVENT or EXT FREQ connector with the corresponding connector on an external device p n 14 008010 01LF Null Modem Cable Connects the receiver with an external device controller or computer for data transfer and receiver configuration p n 14 008086 01 Can also be purchased at any local computer store Power Cable Connects the power supply unit to a grounde...

Страница 32: ...pplied from an electrical outlet to a direct current DC for powering the receiver The unit connects to the receiver via the receiver power cable see the power related sections in Chapter 2 p n 22 034101 01 Receiver Power Cable Connects the receiver and the power supply unit via SAE connectors Body of connector is red p n 14 008016 04LF Fused Pigtail Cable Connects the receiver power cable via SAE ...

Страница 33: ...rmanently activates desired purchased options Receiver options remain intact when clearing the NVRAM or resetting the receiver The OAF enables the following kinds of functions For a complete list of available options and details visit the TPS website at www topconpositioning com or consult your TPS dealer Type of signal standard L1 optional L2 L5 GPS GLONASS GALILEO External CF memory card Update ...

Страница 34: ...Introduction NET G3A Operator s Manual Notes 1 22 Net G3A_OM_Book book Page 22 Thursday May 14 2009 8 49 AM ...

Страница 35: ...in the Net G3A After determining the application use the selected software to configure the receiver for your application Finally collect almanacs and ephemerides to begin working with the Net G3A in its intended application The following sections describe these steps in detail Determining the Reference Station Site on page 2 2 Installing Topcon Software on page 2 5 Installing the CF Card on page ...

Страница 36: ...Reference Stations CORS Consider the Net G3A Reference Station Application Several decisions about the reference station application need to be determined before considering both the physical location and the receiver setup These decisions affect virtually all the associated project planning site inspection hardware software setup and data gathering activities Among the questions to consider are t...

Страница 37: ...in the vicinity The location of the receiver Receiver should be indoors placed on a flat surface such as a table or stable shelf provide free access to the receiver s front and rear panels and be easy to reach and handle for maintenance activities Equipment connectivity and antenna cabling system The site should provide appropriate routings for connecting the various equipment Cables should be uno...

Страница 38: ...r operational PWR 1 can be connected to the main power using the Universal Power Supply included with the Net G3A PWR 2 can be connected to any alternative power source capable of supplying 6 to 28 V DC including an Uninterrupted Power Supply If the main power fails then the unit automatically switches from PWR 1 to PWR 2 When power is restored on PWR 1 the Net G3A reverts to PWR 1 maintaining con...

Страница 39: ...ncludes the following software programs used for configuring and maintaining the receiver This software is also available on the Topcon website www topconpositioning com to registered users If you are installing the program s from the GPS CD insert the CD into the computer s CD ROM drive If you are downloading the program s from the website then extract the program s files into a folder on the com...

Страница 40: ...RS 232C or USB port Use PC CDU version 7 12 or newer to correctly configure the receiver 1 Create a PC CDU folder on your computer s hard drive and place the compressed PC CDU zip file retrieved from either the Topcon website or the GPS CD in this folder 2 Navigate to the PC CDU folder and double click the PC CDU zip file 3 Extract the PCCDU EXE and associated dll file to the PC CDU folder Figure ...

Страница 41: ...7 or newer to correctly configure the receiver 1 Create an FLoader folder on your computer s hard drive and place the compressed FLoader zip file retrieved from either the website or the GPS CD in this folder 2 Navigate to the FLoader folder and double click the FLoader zip file 3 Extract the FLoader exe file to the FLoader folder Figure 2 2 4 Create a shortcut on the computer s desktop for quick ...

Страница 42: ...install the CF card prior to operating the Net G3A The door also provides quick access to the card for removal 1 Ensure the receiver is turned off 2 Turn the two door screws to the left to open the door 3 Carefully insert the CF card label side up into the CF card slot Figure 2 3 on page 2 8 Figure 2 3 Install the CF Card CAUTION To preserve data integrity only install or remove the CF card when t...

Страница 43: ...sferring raw data files from the receiver s CF card The Net G3A supports flash based UMS devices as well as hard drive based UMS devices with USB 1 1 2 0 interface A UMS device can be purchased at your local computer supply store Before using the UMS device it should be formatted to a FAT32 file system properly connected to the NET G3A receiver and activated For more details see Formatting the UMS...

Страница 44: ...icrosoft Help and Support at www support microsoft com If you want more than 32 GB of disk space on the UMS device then use external disk partition software Connecting and Activating the UMS Device 1 Connect the adapter cable to the Ethernet USB port on the rear panel of the Net G3A receiver Figure 2 4 Connecting the UMS Device 2 Connect the UMS device to the type A USB port on the adapter cable S...

Страница 45: ...e on page 4 4 To remove the UMS device Carefully take out the UMS device from the USB port Powering the Receiver The Net G3A receiver is designed to derive power from external power sources Figure 2 5 on page 2 12 or its backup batteries iBEST When setting up the receiver consider the following powering requirements Never use an extension cord for permanent power supply This kind of setup can crea...

Страница 46: ...tware The power LEDs on the receiver indicate the following power status Solid Green power within the acceptable range 6 28 V DC is present on this PWR port and is being used to power the receiver The corresponding backup battery is fully charged Solid Yellow power within the acceptable range 6 28 V DC is present on this PWR port but is not being used to power the receiver Solid Red either a power...

Страница 47: ... and the REC LEDs are off This delay about 1 second prevents the receiver from being turned off by mistake Charging the Backup Batteries The charging circuitry of the iBEST system automatically charges the backup batteries whenever the Net G3A is plugged into an external power source via any PWR connector The receiver has to be on to charge the batteries An approximately 8 hour charge cycle fully ...

Страница 48: ...her satellites in the same system only GPS and GLONASS satellites broadcast ephemeris data cyclically within 30 seconds GPS satellites broadcast almanac data cyclically within 12 5 minutes GLONASS satellites broadcast almanac data cyclically within 2 5 minutes When the receiver has an almanac you can considerably reduce the time needed to search for and lock onto satellite signals The receiver reg...

Страница 49: ...CDU and TopNET provide an interface for various configuration monitoring and management functions for the receiver Other software such as FLoader are used to update maintain or configure the components of a connected receiver The Net G3A uses the following types of cables to connect with a computer RS232 cable See Establishing an RS232 Cable Connection on page 2 16 USB cable the TPS USB driver mus...

Страница 50: ...e 2 22 1 Using the RS232 cable connect the serial port of your computer usually COM1 to the receiver s serial port either ODU or DE 9 Use the serial port most convenient for you because both are equal in functionality but simply require different cables Figure 2 6 Net G3A Serial Ports 2 Press the power buttons on the receiver and computer to turn them on FN FN STA T LIN K PW R 1 REC RX TX PW R 2 A...

Страница 51: ...on the rear panel via the adapter cable Figure 2 7 Net G3A USB Ports 2 Press the power buttons on the receiver and computer to turn them on Establishing an Ethernet Connection Make sure the IP settings of the receiver have been configured before connecting the receiver and computer using an Ethernet connection This configuration requires connecting the receiver and computer using an RS232 cable be...

Страница 52: ...ysical connection of the cables receiver and computer PC CDU Connection Parameters on page 2 22 describes a software connection with the receiver 1 Insert the 12 pin connector of the Ethernet adapter into the receiver s ETHR port 2 Connect the other end of this adapter to either end of the Ethernet crossover or straight through cable 3 Plug the second end of the Ethernet cable into the Ethernet ja...

Страница 53: ...A network connection requires a unique static IP address whether or not a Dynamic Host Configuration Protocol DHCP is used on the network a subnet mask and a default gateway for each receiver The following procedure describes how to connect the receiver to a computer using Ethernet ports and how to configure the receiver to be recognized in a network The example in this procedure uses a protocol w...

Страница 54: ...r by one The last number must differ from the computer s IP address but be within the 0 to 255 range for example 192 168 0 2 IP Mask enter the same number used for the computer Gateway enter the same number used for the computer 5 In the Telnet Settings area leave all settings at the defaults but ensure that TCP port is set to 8002 Figure 2 9 on page 2 21 TCP port 8002 default value This is the po...

Страница 55: ...nds the receiver allows an inactive connection to remain open After this time the receiver terminates the unused connection 7 If required enter a Network Password to access the FTP server Figure 2 9 Figure 2 9 Ethernet Connection Settings FTP Network Example 8 Click Apply and then OK to set the parameters 9 Click Tools Reset receiver to restart the receiver 10 Click File Disconnect 11 Connect the ...

Страница 56: ...nection types Figure 2 10 PC CDU Connection Settings RS232 and USB Table 2 1 PC CDU Connection Parameters for RS232 and USB Parameter RS232 USB Connection Mode Direct Port Port connecting the computer and receiver typically COM1 COM2 for RS232 USB Baud Rate Communication rate between the receiver and the computer usually 115200 n a Rec ID n a Receiver s identification number RS232 USB Net G3A_OM_B...

Страница 57: ...hernet Direct Example Table 2 2 PC CDU Connection Parameters for Ethernet Parameter Direct Network Connection Mode Direct Port ETHR TCP port 8002 default Host name IP address assigned to the receiver Password n a Assigned during initial setup Net G3A_OM_Book book Page 23 Thursday May 14 2009 8 49 AM ...

Страница 58: ...eceiver PC CDU displays the current voltage for the power source 1 Connect your receiver and computer See Connecting the Receiver and a Computer on page 2 15 for this procedure 2 Once connected click Configuration Receiver 3 View the Voltages information Figure 2 12 External and On Board display the voltage drawn by the receiver Figure 2 12 View Voltages Information Net G3A_OM_Book book Page 24 Th...

Страница 59: ...arios including the following permanent and semi permanent Reference Station temporary campaign receiver RTK or DGPS rover for monitoring a fixed location system monitoring or mobile data collecting This chapter contains information on the basic configuration of the Net G3A for some of these applications Further configuration information is contained in the PC CDU manual as well as the TopNET soft...

Страница 60: ...n on any of the procedures in this section or on PC CDU or TopNET refer to the appropriate manual available from Topcon Once you have established a connection between the receiver and the computer you will be able to configure the receiver and its components send commands to the receiver download files from the receiver s memory load a new OAF and other configuration files to a receiver The follow...

Страница 61: ...ns settings such as port name baud rate if applicable and flow control if applicable display in the lower left corner of the main window of PC CDU A timer begins to count up in the lower right corner as well Figure 3 1 Figure 3 1 PC CDU Connection Established 3 Click Configuration Receiver NOTICE Click Apply after making any configuration change otherwise the receiver will not register the change ...

Страница 62: ...ameters for the MINTER Tab Parameter Setting Recording interval Enter 15 seconds This variable depends on post processing requirements Elevation mask angle Enter 15 degrees Five degrees default value is recommended for base operations File name prefix Enter the last 3 digits of the receiver s serial number FN key mode starts stops data recording using the FN key For Static data recording select LE...

Страница 63: ...e Base tab set the following parameters Figure 3 5 on page 3 6 and then click Apply Base Station Coordinates Select the point to which the entered coordinates are referred Phase Center L1 or Antenna Reference Point Antenna Type select the desired antenna type from the list of NGS standard antenna names Antenna position enter Lat Lon and Alt values using one of the following methods If known type i...

Страница 64: ...lick Apply Figure 3 6 on page 3 7 NOTICE The reference geodetic coordinates specified on this tab relate to the antenna L1 phase center NOTICE For post processed surveys keep the default values for these parameters Table 3 2 Receiver Parameters for the Ports Tab Parameter Base Receiver Input n a Leave the default Command Output Select the type and format of differential corrections Period sec Ente...

Страница 65: ... Figure 3 7 Code multipath reduction enable Baud rate Select a baud rate to use for transmitting differential messages from the receiver board to the modem module The baud rate must match the modem s serial port speed RTS CTS Select to enable handshaking Table 3 2 Receiver Parameters for the Ports Tab Continued Parameter Base Receiver Net G3A_OM_Book book Page 7 Thursday May 14 2009 8 49 AM ...

Страница 66: ...r the NVRAM For more details on the settings available for configuring the Base and Rover receivers refer to the PC CDU Reference Manual 12 Continue with other configuration activities or click File Disconnect and then File Exit to quit PC CDU Disconnecting before exiting ensures proper port management NOTICE Disconnect the receiver from PC CDU before exiting to eliminate possible conflicts with t...

Страница 67: ...ions For more information about using the MINTER see MINTER Operation on page 3 16 Turns the receiver on or off puts it in Sleep mode Turns data recording on or off FN button Changes the receiver s information mode Shows the number of GPS green and GLONASS orange satellites being tracked STAT LED Shows the data recording status REC LED Shows each time data is recorded to the memory REC LED FN STAT...

Страница 68: ...for this procedure 2 On the Connection Parameters dialog box enable RTS CTS handshaking Figure 3 9 See PC CDU Connection Parameters on page 2 22 for details on setting other parameters 3 Click Connect Figure 3 9 Connection Parameters MINTER Settings 4 Click Configuration Receiver and then click the MINTER tab Set the following parameters and click Apply Figure 3 10 See the following pages for para...

Страница 69: ... data logging This setting is used for both logging a single log file and logging receiver data in AFRM mode Values are 1 86400 seconds The default value is one second Elevation Mask for Log File parameter This parameter specifies the minimum elevation angle for the satellites whose data will be put in the receiver files logged when pressing FN The default value is five degrees File Name Prefix pa...

Страница 70: ...mode Automatic File Rotation Mode AFRM parameters TPS receivers are capable of automatically rotating log files During a file rotation event the receiver closes the current file and opens a new one according to a user defined schedule The Period and Phase parameters specify this schedule File rotation launches the moment the receiver time module Period is equal to Phase More precisely a new log fi...

Страница 71: ... earliest log file If this parameter is enabled your receiver will erase the file with the earliest file creation time date AFRM must be enabled to use this FIFO First In First Out feature The default value is off disabled FN Key Mode parameter Use these two radio buttons to program how the receiver will react when pressing the FN key LED blink mode switch pressing FN will toggle between the MINTE...

Страница 72: ...me entered in the Always append to file field Table 3 3 Data Recording Parameter Behavior Before Power Failure Enabled Radio Button Results Off On Always Receiver data logged to file specified Data logging will not resume when power is restored Receiver will resume data logging to the same file when power is restored Receiver will resume data logging to the same file when power is restored Receive...

Страница 73: ... PC CDU After taking the receiver out of Sleep Mode Figure 3 11 MINTER Tab No file specified receiver data logging off Data logging will not start when power is restored Data logging will not start when power is restored A log file with a default name will open and data logging will start after power is restored Table 3 3 Data Recording Parameter Behavior Continued Before Power Failure Enabled Rad...

Страница 74: ...rval See Recording Interval parameter on page 3 11 for details The REC LED blinks green each time data is written to the receiver s memory If the REC LED is red the receiver has run out of memory has a hardware problem or contains an improper OAF see Option Authorization File OAF on page 1 21 for more information Use PC CDU to enable the desired FN key mode in the receiver either LED blink mode sw...

Страница 75: ...s been enabled using PC CDU To change the information mode of the receiver press the FN button three times for less than 3 second when LED blink mode switch has been enabled using PC CDU To change the baud rate of the receiver s serial port press the FN button for 5 to 8 seconds This is useful if the data collector does not support the rate that the receiver port is set to After about five seconds...

Страница 76: ...essing the Net G3A using the Web interface determine whether the valid network parameters IP address gateway etc are specified in the receiver Refer to Configuring an Ethernet Connection Using PC CDU on page 2 19 for details regarding the network parameters 1 Open a recommended Web browser The browser window appears 2 In the Address or Location bar of the Web browser type one of the following addr...

Страница 77: ...gin 4 Click Enter After logging in to the Web interface you can view and modify the receiver parameters NOTE When accessing the Web interface via SSL communications a warning may appear stating the security certificate was issued by a company you have not chosen to trust You can safely ignore this warning and continue with the login procedure Your communications will use SSL NOTE You can access th...

Страница 78: ...ng an Antenna Cabling System A cable system running between the antenna s and the receiver must meet certain requirements to provide the minimum level of signal loss thus delivering a quality signal These requirements include the following Cable length should be kept to a minimum Topcon offers cables of various lengths from 3 to 100 meters Use only low loss coaxial cables For distances of up to 10...

Страница 79: ...ith this splitter For applications where power is supplied from a separate source consider using the bias tee The bias tee typically has two coaxial connectors and a connector to power the antenna s LNA from an external power supply One of the coax connectors is usually marked RF DC and will have DC appearing on its center pin The other connector is marked RF and it is DC blocked The remaining con...

Страница 80: ...ount drill four screws through the mounting location shelf and into the receiver s mounting holes 3 Connect the power cable to an available and grounded outlet See Powering the Receiver on page 2 11 for more details and precautions 4 Connect the antenna cable If recording data to an external device such as a USB hard drive connect it to the receiver using the required communication cable NOTE See ...

Страница 81: ...than can reliably fit on a flat plane therefore the antenna adjustment must be done in three dimensions and then projected onto a two dimensional plane The receiver calculates the coordinates of the antenna s phase center To determine the coordinates of the station marker the user must specify the following Measured height of the antenna above the station marker Method of measuring the antenna hei...

Страница 82: ...red depending on the type of measurement taken For vertical the offset is simply added to the measured vertical height to produce a true vertical height For slant height the vertical height must first be calculated using the radius of the antenna then the offset can be added The offsets are different because of the difference in location between the slant measuring point and the vertical measuring...

Страница 83: ...nce the short red blink is gone the receiver has a position and surveying can begin wait for green and orange lights before beginning data collection This ensures that the receiver has the correct date and time and is locked on to enough satellites to ensure good quality data The process of locking on to satellites normally takes less than one minute In a new area or after resetting the receiver i...

Страница 84: ...suited for all kinds of base station surveys One receiver over a survey marker collects raw data during a certain period of time The length of the observation sessions can vary from a few minutes to several hours The optimal observation session length depends on the surveyor s experience as well as the following factors the number of satellites in view the satellite geometry DOP the antenna s loca...

Страница 85: ...accuracy requirement After the survey completes data the receivers collect can be downloaded onto a computer and processed using post processing software for example Topcon Tools Analyzing Signal to Noise Ratio Knowing the strength and reliability of the ranging signal transmitted from the satellites will help determine the quality of the satellite signals Use Table 3 4 to help estimate signal qua...

Страница 86: ...ning accuracy or loss of lock to the satellites in areas affected by RFI To enable AJS 1 Run PC CDU 2 Click Configure Receiver Advanced Anti Interference and then select Auto 3 Click Apply OK To view textual information about detected in band interference signals enable the JI message using the Manual Mode window Working with External Devices The Net G3A receiver can be connected with various exte...

Страница 87: ...ity The GPS board inside the receiver requires firmware to properly operate and provide appropriate functionality As Topcon releases firmware updates loading these updates into the receiver will ensure that the receiver operates at its full potential Downloading Data Files from an Installed Memory Card After completing a survey download data files from the memory card installed in the receiver to ...

Страница 88: ...n Parameters dialog box open If this dialog box is not open then click File File Manager on the PC CDU main page 2 On the Connection Parameters dialog box enable RTS CTS handshaking and then click Connect Figure 4 1 on page 4 2 Figure 4 1 Connection Parameters RTS CTS Handshaking 3 Click File File Manager and then click the Download path tab on the File Manager dialog box Figure 4 2 Figure 4 2 Fin...

Страница 89: ...page 4 3 To select multiple files hold down the shift key and click on sequential files to select several files at once or hold down the Ctrl key and click on individual files Figure 4 3 Download Files 6 Click the Download button During the download status indicators display next to each file Figure 4 4 Blue indicator file in queue for downloading Red indicator file currently downloading Net G3A_O...

Страница 90: ...nnect your receiver and computer See Connecting the Receiver and a Computer on page 2 15 for information about this procedure 2 Connect the UMS device as described in Connecting and Activating the UMS Device on page 2 10 3 Run PC CDU The Connection Parameters dialog box appears If this dialog box is not open then click File File Manager on the PC CDU main page 4 On the Connection Parameters dialog...

Страница 91: ...y Card P N 7010 0935 4 5 Figure 4 5 Connection Parameters RTS CTS Handshaking 5 Click File File Manager 6 In the File Manager dialog box click the USB Copy tab Figure 4 6 Figure 4 6 USB Copy Net G3A_OM_Book book Page 5 Thursday May 14 2009 8 49 AM ...

Страница 92: ...uential files to select several files at once or hold down the Ctrl key and click on individual files NOTICE The selected files also appear in the USB Storage box with color coded names A black file name indicates that the file already resides on the UMS device A gray file name indicates that the file is selected and is ready for copying A red file name indicates that the file cannot be copied for...

Страница 93: ...the computer is required to access the data on the card Before Topcon Link can read data on a Memory Card the card must be formatted for Topcon devices The device icon for a formatted card will be red The device icon for an unformatted card will be gray To format a memory card 1 Insert the memory card into the card reader CAUTION During the copying process the REC LED will blink yellow every secon...

Страница 94: ...ing Data Files from an Installed Memory Card A memory card holds a finite amount of collected data To free up space for more or new data delete old data For more information on managing the receiver s memory see Managing Receiver Memory on page 4 10 The following steps use PC CDU to delete files but any Topcon receiver management software can be used You can also configure the receiver to automati...

Страница 95: ...o delete on the Download files tab Figure 4 11 on page 4 10 To select multiple files hold down the shift key and click on sequential files to select several files at once or hold down the Ctrl key and click on individual files 4 Click Delete Figure 4 11 on page 4 10 5 Click Yes on the delete files confirmation dialog box PC CDU deletes the selected files 6 Click Exit on the File Manager screen Net...

Страница 96: ...ype of data being recorded Use the formulas below to compute the approximate size of the receiver s log files These equations are based on the default set of messages SS the estimated size of one epoch of raw data in the receiver s log file expressed in bytes N the number of observed satellites per epoch When recording only L1 data SS 183 22 N When recording L1 and L2 data SS 230 44 N Table 4 1 sh...

Страница 97: ...ngle frequency dual system receiver Memory needed to record data 6 11 MB 1 1 MB 221 KB 74 KB 37 KB 10 14 MB 1 4 MB 283 KB 94 KB 47 KB 14 17 MB 1 7 MB 345 KB 115 KB 57 5 KB 18 20 MB 2 MB 407 KB 136 KB 68 KB Dual frequency dual system receiver Memory needed to record data 6 17 MB 1 7 MB 347 KB 116 KB 58 KB 10 23 MB 2 3 MB 471 KB 157 KB 78 5 KB 14 29 MB 2 9 MB 595 KB 198 KB 99 KB 18 35 MB 3 5 MB 720 ...

Страница 98: ...e receiver s memory size Figure 4 12 Initializing the File System When the receiver s memory is initialized information on the file system and physical memory displays Refresh reloads the information Save to file saves the files system and physical memory information to a text file First confirmation to initialize file system Second confirmation to initialize file system Initialization in progress...

Страница 99: ...ly Raw Measurement Update Rate Update Rate set to 20 ms Position Update Rage Update Rate set to 20 ms 5 Click Refresh and examine the values in the Current Update Rate fields They should display 20 6 Once verified click OK When requesting any data recording or output with a period that is a recording or output not directly supported by the current state of the receiver PC CDU will launch the Outpu...

Страница 100: ...con receiver management software The following steps use PC CDU to view options 1 Connect your receiver and computer See Connecting the Receiver and a Computer on page 2 15 for this procedure 2 Click Tools Receiver Options The Options Manager dialog box Figure 4 13 on page 4 15 contains the following information Option name a name description of the option Current the current status of the option ...

Страница 101: ...he option is either enabled or disabled 3 When finished click Exit on the Option Manager dialog box and then click File Disconnect to disconnect from PC CDU and prevent conflicts with serial port management Figure 4 13 View Option Manager Net G3A_OM_Book book Page 15 Thursday May 14 2009 8 49 AM ...

Страница 102: ...r and a Computer on page 2 15 for this procedure 2 Click Tools Receiver Options 3 Click Load at the bottom of the Option Manager dialog box see Figure 4 13 on page 4 15 4 Navigate to the location of the new Option Authorization File OAFs have jpo or tpo extensions and are unique to each receiver Figure 4 14 Figure 4 14 Load OAF 5 Select the appropriate file and click Open Figure 4 14 The new recei...

Страница 103: ... front door 2 Insert a paper clip or any pointed stick small enough to fit into the pinhole Figure 4 15 3 Gently press the reset button for about one second until the unit powers off Figure 4 15 Reset the Receiver NOTICE A hard reset simply cycles the receiver s power It does not erase information stored in the receiver s memory A RX TX FN STAT LINK PWR 1 PWR 2 A RX TX FN STAT LINK PWR 1 PWR 2 REC...

Страница 104: ... and almanacs around 15 minutes Clearing the NVRAM of your receiver will not delete any files already recorded in your receiver s memory however it will reset your receiver to factory default values In addition the NVRAM keeps information about the receiver file system Note that after clearing the NVRAM the receiver s STAT LED will flash orange for a few seconds indicating that the receiver is sca...

Страница 105: ... purposes during normal operation Sleep Mode turns the receiver off but keeps it powered on in standby and ready to activate via any input on a serial port Entering Extended Information Mode Extended Information Mode EIM is used for receiver testing purposes In this mode the receiver continues to work as usual but the STAT LED indicates extended information using a delimiter The delimiter is a dis...

Страница 106: ... 6 Continuous tracking time is more than 15 minutes The color of the blink indicates that information for the test is unavailable orange the receiver passed the test green or the receiver failed the test red 1 To switch to EIM press and quickly release the FN key three times within three seconds on the MINTER 2 Watch for the delimiter double blink With good receiver antenna and observation conditi...

Страница 107: ...receiver has the most recent updates Receiver board firmware is released as a compressed file that you download and decompress This file contains the following two files ramimage ldr the Receiver board RAM file main ldp the Receiver board Flash file NOTE If you press the power key for more than 14 seconds it will be ignored This protects the receiver operation against stuck keys NOTICE The Net G3A...

Страница 108: ...ebsite See Installing FLoader on page 2 7 for installing FLoader on the computer 1 If needed download the new firmware package to your computer 2 Connect your receiver and computer See Connecting the Receiver and a Computer on page 2 15 for this procedure 3 Start FLoader 4 On the Connection tab select the COM port on your computer that connects with your receiver and then select its speed usually ...

Страница 109: ...ect Soft Break Capture from the Capture Method drop down list recommended Figure 4 19 Figure 4 19 Program Tab Settings 8 Browse for and select the receiver board s RAM file and Flash file Figure 4 19 9 Click Load and wait until every file loads into the receiver NOTICE If you selected an incorrect file an error message displays at the bottom of the dialog box Select the correct file Net G3A_OM_Boo...

Страница 110: ...ual 4 24 10 Click File Exit 11 Clear the receiver s NVRAM see Clearing the NVRAM on page 5 9 and update the almanac see Collecting Almanacs and Ephemerides on page 2 23 after loading new firmware Net G3A_OM_Book book Page 24 Thursday May 14 2009 8 49 AM ...

Страница 111: ...e is loaded into the receiver Check the Topcon website at www topconpositioning com for the latest updates Then try the following Reset the receiver using PC CDU Tools Reset receiver Restore default settings using PC CDU Configuration Receiver and then click Set all parameters to defaults Clear the NVRAM see Clearing the NVRAM on page 4 18 Initialize the file system click Tools Initialize file sys...

Страница 112: ...ing are some of the most commonly encountered power problems The receiver does not power up D An external power source may be improperly connected Check that the power source is correctly connected Check that the power source contacts are clean and dust free D The power source may be discharged if a battery is used or may not provide enough power Connect attach a fully charged battery or a correct...

Страница 113: ...r information about the receiver s connectors D The cable is damaged Use an undamaged cable Contact your Topcon dealer to replace the cable Generic problems D The receiver port used for connection is not in Command mode 1 Connect your receiver and a computer using a free port see Connecting the Receiver and a Computer on page 2 15 and start PC CDU 2 Click Configuration Receiver Ports 3 Change the ...

Страница 114: ...degrees Lower the elevation mask See page 3 5 for information about setting the elevation mask D The survey is conducted near obstructions tree canopy tall buildings etc Check that the Multipath Reduction boxes have been enabled 1 Connect your receiver and a computer and start PC CDU See Connecting the Receiver and a Computer on page 2 15 2 Click Configuration Advanced and the Multipath Reduction ...

Страница 115: ...al for a detailed description of options D There are not enough common satellites In order to obtain a fixed solution the Base and Rover should track at least five common satellites Ensure that both the Base and Rover receivers use the same updated almanac See Collecting Almanacs and Ephemerides on page 2 14 Check the elevation masks of the Rover and Base receivers they should be the same See page...

Страница 116: ...ed or expired Check that the card is properly inserted For details see Installing the CF Card on page 2 8 Check that the memory option is enabled For details see Checking the Receiver s OAF on page 4 14 D The receiver s memory card has no free space Download and or delete data files to free up space for new files see Downloading Data Files from an Installed Memory Card on page 4 1 and Deleting Dat...

Страница 117: ...stomer support via e mail use TopconTechnicalSupport topcon com When e mailing Topcon customer support provide the following information for better faster service 1 The receiver model and configuration settings In PC CDU click Help About and then click Save to file Enter a file name and save it to your computer Attach this file to the email 2 The system hardware specifications for the computer run...

Страница 118: ...stomer support representative will reply within 24 hours depending on the severity of the problem Website The Topcon Positioning Systems website provides current information about Topcon s line of products The support area of the website provides access to frequently asked questions configuration procedures manuals e mail support etc To access the Topcon website visit www topconpositioning com Net...

Страница 119: ...cations assume a minimum of 6 GPS satellites above 15 degrees in elevation and adherence to the procedures recommended in this manual NOTICE In areas of high multipath during periods of large PDOP and during periods of increased ionospheric activity performance may degrade NOTICE Use robust checking procedures in areas of extreme multipath or under dense foliage Net G3A_OM_Book book Page 1 Thursda...

Страница 120: ...he placement of the screw holes Figure A 1 Net G3A Dimensions Use these dimensions when drilling holes into a permanent mount using four 8 32 screws to attach the receiver NOTE Dimensions are in inches 8 32 UNC 4X Ø0 135 4 960 6 5 6 693 11 0 1 244 FN STAT LINK PWR 1 REC RESET PWR 2 3 75 A Net G3A_OM_Book book Page 2 Thursday May 14 2009 8 49 AM ...

Страница 121: ...ensions W 166 mm x H 93 mm x D 275 mm 6 54 x 3 66 x 10 83 Weight 3 0 kg 6 61 lbs Antenna External Controller External MINTER Keys Two keys Power On Off FN start stop data logging switch information mode LEDs Six LEDs STAT satellite and receiver status REC record and data status RX TX modem status LINK network connection status currently n a PWR x 2 power status Environment Operating temperature 40...

Страница 122: ...te 460800 230400 115200 Default 57600 38400 19200 9600 4800 2400 1200 600 300 Flow control RTS CTS Length 7 8 default Stop bit 1 default 2 Parity None default Odd Even USB port Full speed 12 Mb s Ethernet port 10 100 Mb Half Full Duplex Connectors 2x PWR 4x RS232 Serial USB Host Device Ethernet GPS antenna 1PPS Event Marker Ext Frequency MINTER Six external LEDs see LEDs on page A 3 for details ON...

Страница 123: ...rval 1Hz standard 5 10 20 and 50 Hz optional DGPS Correction format RTCM SC104 Ver 2 1 2 2 2 3 RTCM message type 1 3 9 31 32 34 user selectable Process interval 1Hz standard 5 10 20 50 Hz optional Output interval for RTCM correction data 1Hz standard 5 10 20 50 Hz optional Elevation mask 0 to 90 deg independent of data logging Multi base DGPS Differential correction select mode Nearest Mix Best op...

Страница 124: ...rapolation 20 to 30 msec Raw Data logging Receiver can record raw data at another interval during RTK operation Status Fix Float DOP Data Link Status Modem Latency Common satellites Percentage of fixing Results RTK coordinates HRMS VRMS Covariance Matrix Ambiguity fixing level Selectable thresholds Low 95 Medium 99 5 High 99 9 Survey Modes Base Rover optional Static Kinematic Stop and Go RTK Real ...

Страница 125: ...1 L2 both code and phase GALILEOa Tracking Specifications Standard Channels 144 universal channels G GG GD GGD Optional Cinderella days see page A 8 for details Tracked Signals GPS GLONASS L1 L2 C A L5 GALILEO and P Code and Carrier WAAS EGNOS Tracking Functions Multi path reduction C A Code phase and Carrier phase PLL DLL setting Bandwidth order adjustable Smoothing interval Code user selectable ...

Страница 126: ... O Multiple Base RTCM Geoid and Magnetic Variation models Different DATUMs support Output of grid coordinates CMR and CMR support Memory Internal Memory CF card removable Capacity Dependent on capacity of the installed CF card currently up to 2 GB The capacity is extended by several hundred gigabytes when using a mass storage device connected to the USB host Logging Size 3 5 MB per hour 18 SVs 1se...

Страница 127: ... power connector specifications Power x 2 Serial RS232C 1xODU and 3xDE 9 USB Host Device Ethernet GPS antenna 1PPS Event marker External Frequency Table A 3 Power Connector Specifications Number Signal Name Dir Details 1 Power_INP P 6 to 28 volts DC input 2 Power_INP P 6 to 28 volts DC input 3 Power_GND P Ground power return 4 Power_GND P Ground power return 5 Aux_Power P 6 to 28 volts DC input 1 ...

Страница 128: ...specifications The back panel serial RS232 connectors Figure A 4 are a sealed receptacle 9 pin D shell connector Figure A 4 Serial RS232 Connector Table A 4 RS232 Connector Specifications Number Signal Name Dir Details 1 Ext_PWR O 6 to 28 volts DC output at max load 0 5 A 2 GND Signal ground 3 CTS I Clear to send 4 RTS O Request to send 5 RXD I Receive data 6 TXD O Transmit data 7 Not used 1 2 3 4...

Страница 129: ...ODU MINI SNAP Figure A 5 Figure A 5 Ethernet Connector Table A 5 RS232 Connector Specifications Number Signal Name Dir Details 1 Not used 2 RXD I Receive data 3 EXD O Transmit data 4 Not used 5 GND Signal ground 6 Not used 7 RTS O Request to send 8 CTS I Clear to send 9 Not used 2 4 5 1 3 6 9 7 12 11 10 8 Net G3A_OM_Book book Page 11 Thursday May 14 2009 8 49 AM ...

Страница 130: ...AN TXD O Transmit data minus 3 LAN RXD I Receive data plus 4 LAN RXD I Receive data minus 5 USB_PWR_HOST P Power to the UMS device 6 USB_HOST_D I O Data minus 7 USB_HOST_D I O Data plus 8 GND Signal ground 9 USB_D I O Data minus 10 USB_D I O Data plus 11 GND Signal ground 12 USB_PWR P Bus power input Table A 7 External GPS Antenna Connector Specifications Type Signal Name Dir Details TNC Ant_IN I ...

Страница 131: ...m load Pulse Width 3 3 msec normal pulse 5 2 msec marked pulse Rise Time 3 nsec Fall Time 3 nsec Synchronization Edge Rising Falling user selectable Resolution 5 nsec Period 10 to 1000000000 msec Offset 500000000 to 500000000 msec 500000 to 500000 nsec Reference time GPS GLONASS UTC USNO UTC SU Table A 9 Event Marker Connector Specifications Connector BNC female Polarity Positive Negative Pulse Lo...

Страница 132: ...e Resolution 5 nsec Reference time GPS GLONASS UTC USNO UTC SU Table A 10 External Frequency Connector Specifications Output Connector BNC 50 Ohm impedance Frequency 20 MHz Amplitude 0 6 Vp p into 50 Ohm Waveform Sine wave Harmonics 19 dBc Spurious 70 dBc Input Connector BNC 50 Ohm impedance Frequency 5 10 20 MHz Sensitivity 0 5 3 Vp p into 50 Ohm Table A 9 Event Marker Connector Specifications Co...

Страница 133: ...art number SanDisk 16 22 006011 16 SDCFBI 16 101 32 22 006011 32 SDCFBI 32 101 SDCFBI 32 201 00 SDCFBI 32 201 00 64 22 006011 64 SDCFBI 64 101 SDCFBI 64 201 00 80 22 006011 80 SDCFBI 80 101 96 22 006011 96 SDCFBI 96 101 128 22 006011 128 SDCFBI 128 101 SDCFBI 128 201 00 160 22 006011 160 SDCFBI 160 101 192 22 006011 192 SDCFBI 192 101 256 22 006011 256 SDCFBI 256 201 00 512 22 006011 512 SDCFBI 51...

Страница 134: ...1024 22 006011 001 SSD C01GI 3012 White Electronics Designs 128 22 006011 128 WED7P128CFA7000I25 256 22 006011 256 WED7P256CFA7000I25 512 22 006011 512 WED7P512CFA7000I25 1024 22 006011 001 WED7P1G0CFA7000I25 Table A 11 Net G3A CF Cards Compatibility List Continued Capacity MB Topcon part number Manufacture part number Net G3A_OM_Book book Page 16 Thursday May 14 2009 8 49 AM ...

Страница 135: ...duct should never be used Without the user thoroughly understanding this manual After disabling safety systems or altering the product With unauthorized accessories Without proper safeguards at the survey site Contrary to applicable laws rules and regulations DANGER TPS receivers should never be used in dangerous environments Use in rain or snow for a limited period is permitted Net G3A_OM_Book bo...

Страница 136: ...rwise treated without care erroneous measurements may occur The owner should periodically test this product to ensure it provides accurate measurements Inform TPS immediately if this product does not function properly CAUTION Only allow authorized TPS warranty service centers to service or repair this product Net G3A_OM_Book book Page 2 Thursday May 14 2009 8 49 AM ...

Страница 137: ... installations This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio or television equipment reception which can be deter...

Страница 138: ...uct is disposed of correctly you will help prevent potential negative consequences for the environment and human health which could otherwise be caused by inappropriate waste handling of this product For more detailed information about the take back and recycling of this product please contact your supplier where you purchased the product or consult CAUTION Any changes or modifications to the equi...

Страница 139: ...ting from an accident disaster misuses abuse or modification of the product Warranty service may be obtained from an authorized TPS warranty service dealer If this product is delivered by mail purchaser agrees to insure the product or assume the risk of loss or damage in transit to prepay shipping charges to the warranty service location and to use the original shipping container or equivalent A l...

Страница 140: ...Warranty Terms NET G3A Operator s Manual Notes D 2 Net G3A_OM_Book book Page 2 Thursday May 14 2009 8 49 AM ...

Страница 141: ...MINTER 3 9 3 10 Connect receiver to computer using PC CDU 3 3 using RS232 cable 2 16 using USB cable 2 17 using Web interface 3 18 D Data recording auto start 3 14 Data save to SD CF card 2 8 Delete files 4 10 Delimiter 4 19 DGPS 1 4 Differential corrections 1 4 overview 1 4 Download files via PC CDU 4 1 4 4 files via Topcon Link 4 7 firmware 4 21 4 24 indicators 4 3 software 2 5 E EIM 4 19 4 20 L...

Страница 142: ... I Information mode EIM 4 19 sleep 4 21 STAT LED 4 19 Initial data collection dynamic mode 3 14 Install FLoader 2 7 PC CDU 2 6 SD CF card 2 8 Topcon software 2 5 2 7 USB driver 2 15 Internal antenna offset 3 24 L LED LINK 1 9 PWR 1 10 REC blink pattern 1 11 RX TX 1 11 STAT 1 9 LINK LED 1 9 blink pattern 1 9 Load firmware 4 21 4 24 M Memory 2 8 size of log files 4 10 MINTER configure 3 9 3 10 funct...

Страница 143: ...t 1 15 PWR LEDs 1 10 2 12 blink pattern 1 10 R RAM file 4 21 4 23 REC LED and FN button 1 12 blink pattern 1 11 1 12 Receiver modes 4 19 See also EIM See also Normal Mode extended 4 19 4 20 sleep mode 4 21 Recording interval 3 11 Reference station temporary 3 21 Remove CF card 2 9 RS232 connection parameters 2 22 RTK 1 5 RX TX LED 1 11 S SD CF card install 2 8 Serial number 3 4 Serial port 1 14 1 ...

Страница 144: ...Test 4 19 B 2 EIM 4 19 4 20 Topcon Link 2 5 Topcon Link download files 4 7 TopNET configure receiver 3 2 U Uninstall FLoader 2 7 PC CDU 2 7 USB connection parameters 2 22 USB driver 2 15 USB port 1 15 W Warnings B 1 general B 1 usage B 2 Web interface 3 18 Net G3A_OM_Book book Page 4 Thursday May 14 2009 8 49 AM ...

Страница 145: ...Net G3A_OM_Book book Page 1 Thursday May 14 2009 8 49 AM ...

Страница 146: ...rmore CA 94550 800 443 4567 www topconpositioning com ISO 9001 2000 FM 68448 NET G3A Operator s Manual P N 7010 0935 Rev A 05 09 2009 Topcon Corporation All rights reserved No unauthorized duplication Net G3A_OM_Book book Page 2 Thursday May 14 2009 8 49 AM ...

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