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Javad Prego Operator's Manual

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Prego
Operator's Manual
©Copyright Javad Navigation Systems, Inc.
May, 2005
All contents in this manual are copyrighted by Javad Navigation Systems, Inc. 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 JNS.

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  • Page 1 ©Copyright Javad Navigation Systems, Inc. May, 2005 All contents in this manual are copyrighted by Javad Navigation Systems, Inc. All rights reserved. The information contained herein may not be used, accessed, copied, stored, displayed, sold, modified, published, or distributed, or otherwise reproduced...

  • Page 3: Table Of Contents

    Getting Acquainted ........1-8 Internal Components....... 1-9 www.javad.com Prego Operator’s Manual I...
  • Page 4 Chapter 2: Configuration Powering the Prego ........2-2 Internal batteries .
  • Page 5 Prego Setup ........
  • Page 6 Appendix B: Specifications Prego Specifications........B-1 Connector Specifications .......B-8 Power Connector .
  • Page 7 Warranty Terms ........E-1 Index www.javad.com Prego Operator’s Manual V...
  • Page 8 Notes: VI Prego Operator’s Manual www.javad.com...
  • Page 9 Prego Top Panel ........1-12...
  • Page 10 Antenna Offset Measurements ......3-3 Antenna Offset Measurements ......3-4 VIII Prego Operator’s Manual www.javad.com...
  • Page 11 Base Configuration – Ports ......3-17 Prego Rover Station Setup ......3-18 Rover Tab Configuration .
  • Page 12 ETHR Connector ........B-12 X Prego Operator’s Manual...
  • Page 13 Key Combinations ........4-9 www.javad.com Prego Operator’s Manual XI...
  • Page 14 Appendix B: Specifications Prego Specifications ........B-1 Power Connector Specifications ......B-8 RS232 Connector Specifications .

  • Page 15: Preface

    Manual (the “Manual”) have been prepared by Javad Navigation Systems, Inc. (“JNS”) for owners of JNS products. It is designed to assist owners with the use of the Prego receiver and its use is subject to these terms and conditions (the “Terms and Conditions”).
  • Page 16 Software under the terms stated herein and in any case only with a single Prego or single computer. You may not assign or transfer the Software or this license without the express written consent of JNS.

  • Page 17: Regulatory Information

    Conditions (including the Software license, warranty and limitation of liability). SAFETY – Improper use of the Prego can lead to injury to persons or property and/or malfunction of the product. The Prego should only be repaired by authorized JNS warranty service centers. Users should review and heed the safety warnings in Appendix C.

  • Page 18: Fcc Class B Compliance

    Canadian Emissions Labeling Requirements This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Réglement sur le matériel brouilleur du Canada. XVI Prego Operator’s Manual www.javad.com...

  • Page 19: Manual Conventions

    WARNING: Notification that an action will result in system damage, loss of data, loss of warranty, or personal injury. ANGER NDER NO CIRCUMSTANCES SHOULD THIS ACTION BE PERFORMED www.javad.com Prego Operator’s Manual XVII...
  • Page 20 Notes: XVIII Prego Operator’s Manual www.javad.com...

  • Page 21: Chapter 1: Introduction

    NTRODUCTION This chapter describes: • The Prego (Figure 1-1) • Common Prego features and functions • Standard package contents • Getting acquainted with Prego components • The Option Authorized File (OAF) Figure 1-1. Prego www.javad.com Prego Operator’s Manual 1-1...

  • Page 22: Overview

    I N T R O D U C T I O N Overview Overview The Prego is a geodetic dual-frequency, dual-system receiver manufactured by Javad Navigation Systems, Inc. This receiver uses navigational signals from the United States’ Global Positioning System (GPS) and Russia’s GLObal Navigation Satellite System (GLONASS) to calculate positions.

  • Page 23: Calculating Positions

    –Differential GPS (DGPS) strongly mitigates atmospheric and orbit errors, and counteracts anti-spoofing signals the US Department of Defense transmits with GPS signals. –The more satellites in view, the stronger the signal, the lower the DOP number, providing more accurate positioning. www.javad.com Prego Operator’s Manual 1-3...

  • Page 24: Conclusion

    The combination GPS and GLONASS (GPS+) antenna receives the different signals for processing. An external GPS+ antenna equipped with an optional low noise amplifier (LNA) and the receiver’s radio frequency (RF) device are connected with an 1-4 Prego Operator’s Manual www.javad.com...
  • Page 25 RTK mode, raw data measurements are recorded into the receiver’s internal memory. This allows the operator to double check real-time results obtained in the field. The Prego receiver has the following operation modes: • Stand-alone positioning • Relative (differential) positioning with two or more receivers running simultaneously and post-processing of collected raw data measurements.
  • Page 26 This board uses digital mobile telephone system features to transmit and receive data. The coverage area is limited by the abilities of GSM, which are called roaming and routing, and the SIM card enabled for 1-6 Prego Operator’s Manual www.javad.com...

  • Page 27: Standard Package Components

    Roaming refers to the ability to move from one coverage area to another without interruption in service or loss in connectivity. A complete list of the Prego specifications can be found in Appendix B. Standard Package Components The standard Prego package components include: •...

  • Page 28: Literature

    The Prego is also versatile and can be configured in many different ways. The casing allocates space for two nonremovable, on-board Li-Ion batteries, and two Euro cards.

  • Page 29: Internal Components

    GGD with Pacific Crest PDL (UHF) modem (450-470 MHz), receiving only, with integrated Windows® CE controller. The Prego can be controlled using a variety of external controllers and different software. The standard Prego package includes PCView Lite software (downloadable from JNS website) that can be run from a Windows-based computer.

  • Page 30: Radio Modem

    (i.e., location and description) to the rover modem. In its most common configuration, the Prego has an on-board PDL (Positioning Data Link) radio receiver that allows the receiver to capture RTK corrections a PDL Base station broadcasts.

  • Page 31: Power Board

    Prego GPS receiver should run at least 20 hours with fully charged on-board batteries. The Li-Ion batteries used in the Prego should run at no less than 98% capacity after 500 charging cycles. These batteries do not need to be drained before recharging.

  • Page 32: External Components

    I N T R O D U C T I O N Getting Acquainted External Components The Prego receiver has three main panels used for data collection and user interface, and to provide connections for external devices (Figure 1-2). Figure 1-2. Prego Panels...

  • Page 33: Front Panel

    1PPS signals with programmable reference time, period, and offset; synchronized to a specified reference time. Front Panel Figure 1-4 shows the front panel components: Figure 1-4. Prego Front Panel For more information on using the touch screen and keypad, see “Using the Integrated Controller” on page 4-7.

  • Page 34: Bottom Panel

    See “Using the MinPad” on page 4-1 for more information on the Reset key. • A – This serial port is used for communication between the Prego and the external controller, computer, external radio modem, or other devices.

  • Page 35: Gps/Glonass Antenna

    The internal LNA (low noise amplifier) of this antenna accepts voltages between 2.7 V to 12 V. If you decide to use a third-party antenna, make sure that the antenna’s LNA can handle the 5 V of power the Prego provides.
  • Page 36 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 JNS website (www.javad.com) or consult your JNS dealer. • Type of signal (standard L1; optional L2) •...

  • Page 37: Chapter 2: Configuration

    • Collecting almanacs Before you can use your Prego, you need to: 1. Charge the batteries. See “Powering the Prego” on page 2-2. Configure and calibrate (as needed) the various parts of your receiver. See: • “Connecting the Prego and a Computer” on page 2-4, •...

  • Page 38: Powering The Prego

    See “Power Management” on page 2-10 for more information. The Li-Ion batteries used in the Prego should run at no less than 98% capacity after 500 charging cycles. These batteries do not need to be drained before recharging.

  • Page 39: Battery Charger

    2. Plug the power cable into the Prego power port 3. Attach the battery to the battery clip. A single external 12 V and 2.3 A*h battery should run the Prego for about 7 hours and the Prego and modem for no less than 5 hours.

  • Page 40: Receiver

    Connecting the Prego and a Computer To configure, manage files, or maintain the Prego, you need to connect the receiver and a computer using an RS232 cable, and start PCView. PCView is a software used to manage the various functions of your receiver.

  • Page 41: Pcview Main Screen

    C O N F I G U R A T I O N Connecting the Prego and a Computer Start PCView on your computer. The PCView main screen displays (Figure 2-1). Figure 2-1. PCView Main Screen Click File->Connect (Figure 2-2).

  • Page 42: Prego Configuration

    Prego Configuration You use PCView to configure the various parts of the Prego receiver. Any settings you make using PCView will be saved in the Prego receiver’s memory, and will be reflected when you use the MinPad. You can change the receiver’s configuration in the field using the integrated Windows®...

  • Page 43: Configuration->Receiver

    Click Apply after making any configuration change, otherwise your receiver will not accept the change. 1. Connect your receiver and computer. See “Connecting the Prego and a Computer” on page 2-4 for this procedure. Once connected, click on Configuration->Receiver (Figure 2-5).

  • Page 44: Receiver Configuration - Minpad Tab

    Click the Advanced tab on the Receiver Configuration screen (Figure 2-8). Figure 2-8. Receiver Configuration – Advanced Tab Click the Multipath Reduction tab, enable the following boxes, and click Apply (Figure 2-9): • Code multipath reduction • Carrier multipath reduction 2-8 Prego Operator’s Manual www.javad.com...

  • Page 45: Advanced Configuration - Multipath Reduction

    Click the Loop Management tab, enable the following boxes, and click Apply (Figure 2-10): • Enable Common tracking • Static Mode Figure 2-10. Advanced Configuration – Loop Management Click OK to close the Receiver Configuration screen. www.javad.com Prego Operator’s Manual 2-9...

  • Page 46: Power Management

    PCView User’s Manual. The latest copy of this manual can be downloaded from the JNS website. The Prego can be connected to a computer using an RS232 serial cable and the PCView software program. To access the tab controlling the power settings of your receiver, take the following steps: 1.
  • Page 47 • Off – receiver will not charge batteries. • Charge A – receiver will charge only battery A. • Charge B – receiver will charge only battery B. • Auto – receiver will automatically detect and charge batteries. www.javad.com Prego Operator’s Manual 2-11...

  • Page 48: Select Power Output Modes - Ports

    Figure 2-16. Select Power Output Modes – Slots • On – all slots are powered if the receiver is turned on. • Off – internal slots will not be powered even if the receiver is turned on. 2-12 Prego Operator’s Manual www.javad.com...
  • Page 49 • Battery B – displays the voltage of battery B. • Charger – displays the charger’s output voltage during battery charging. 8. Select and check each of the Turn on/off Slots check boxes to enable the corresponding internal slots (Figure 2-18 on page 2-14). www.javad.com Prego Operator’s Manual 2-13...

  • Page 50: Charging Internal Batteries

    Power Mode (see “Zero Power Mode” on page 4-20 for more information). 4.Leave overnight. An eight-hour charge will charge the batteries about 90%. A ten-hour charge will fully charge the receiver. The internal batteries cannot be overcharged. 5.When finished charging, set Power Mode to Auto. 2-14 Prego Operator’s Manual www.javad.com...

  • Page 51: Checking Internal Battery Status

    A fully charged battery should indicate 8.2 to 8.4 V. Radio Configuration The internal PDL radio in your Prego and the base radio can be configured differently depending of your needs and working conditions. Use PCView and the PDL configuration program (from Pacific Crest; included with the base station) to: •...
  • Page 52 Radio Configuration Once connected, click on File->Manual Mode to create a daisy chain between the receiver’s port (A or D) and the Prego PDL modem. Figure 2-19. File->Manual Mode Write each of the following commands, pressing Enter (or clicking Send command) after each command (Figure 2-20 on page 2-17).

  • Page 53: Manual Mode Command Responses

    Run the PDL Radio Configuration Program (pdlconf.exe) from Pacific Crest. Make sure you have the latest version (2.10 or higher). This software is also available at www.paccrst.com (Figure 2-21). Figure 2-21. PDL Radio Configuration Main Screen www.javad.com Prego Operator’s Manual 2-17...
  • Page 54 Figure 2-22. PDL Top Left Corner Icon Menu From the pop-up menu, click Set Capture Method->Soft Break (Figure 2- 23). Figure 2-23. PDL Set Capture Method->Soft Break Click Load to connect to the radio (Figure 2-24). Figure 2-24. Click Load 2-18 Prego Operator’s Manual www.javad.com...
  • Page 55 On the Identification tab, type Owner information (Figure 2-25). Figure 2-25. PDL Identification Tab The Identification screen supplies current information concerning firmware revision, serial number, frequency and power. It also allows for the input of Owner information. www.javad.com Prego Operator’s Manual 2-19...
  • Page 56 • Digisquelch – set on High for Rover; Low for Base station • Forward Error Correction – disable • Scrambling – enable • Local Address – leave at 0 Figure 2-26. PDL Radio LInk Tab 2-20 Prego Operator’s Manual www.javad.com...
  • Page 57 Figure 2-27. PDL Serial Interface Tab If you made changes, click the Program button on the left of the screen to save setting changes to the modem’s memory (Figure 2-28). Figure 2-28. PDL – Click Program www.javad.com Prego Operator’s Manual 2-21...

  • Page 58: Connection Parameters - Manual Mode Only

    Click Close and then Exit to quit the program (Figure 2-29). Figure 2-29. Click Close then Exit Notice: The Base station and internal Prego PDL radios must be configured with the same Channels, Radio Link characteristics (except Digisquelch), and Serial Interface parameters.

  • Page 59: Manual Mode Command Responses

    C O N F I G U R A T I O N Radio Configuration • QUIT • %%set,cur/term/imode,cmd • %%set,dev/ser/c/echo,/dev/null • %%set,dev/ser/c/imode,cmd • %%set,dev/ser/c/rate,38400 • %%set,cur/term/rate,115200 Figure 2-31. Manual Mode Command Responses Click Disconnect. Continue with other configuration or operation functions. www.javad.com Prego Operator’s Manual 2-23...

  • Page 60: Minpad Configuration

    C O N F I G U R A T I O N MinPad Configuration MinPad Configuration The Prego simple user interface (MinPad) consists of two keys (Power and FN) and two LEDs (STAT and REC) that control and display the receiver’s operation (Figure 2-32).

  • Page 61: Connection Parameters - Minpad Settings

    • Files Creation mode on page 2-27 • Automatic File Rotation Mode (AFRM) on page 2-27 • FN key mode on page 2-28 • Initial data collection dynamic mode on page 2-28 • Data recording auto-start on page 2-28 www.javad.com Prego Operator’s Manual 2-25...

  • Page 62: Receiver Configuration - Minpad

    <prefix><month><day><sequential alphabet letter> The file name depends on both the file creation time (month and day) and additional letter suffixes to avoid confusion between files created on the same day. Always Append to the File parameter 2-26 Prego Operator’s Manual www.javad.com...

  • Page 63: Files Creation Mode

    AFRM counter will not decrement. Values are 0 to [2 -1]. The default value is 0 (zero). Zero means that an unlimited number of log files will be created. www.javad.com Prego Operator’s Manual 2-27...

  • Page 64: Fn Key Mode

    Kinematic to specify that the corresponding log file will start with a static (STOP) or kinematic (GO, Trajectory) occupation, respectively. Data Recording Auto-start parameter These radio buttons allow you to program your receiver’s behavior in the event of a power failure. 2-28 Prego Operator’s Manual www.javad.com...
  • Page 65 (to a newly created or an existing file) in the following three cases: • After pressing the MinPad power key. • After resetting the receiver (with PCView or the Reset key). • After taking the receiver out of sleep mode. www.javad.com Prego Operator’s Manual 2-29...

  • Page 66: Calibrating The Windows® Ce Controller

    If the calibration fails, repeat the procedure. Once it succeeds, the unit will tell you to press the Enter key on the controller’s keypad to accept the new calibration settings. Press the Esc key to discard this calibration (to keep the old settings) and repeat the procedure. 2-30 Prego Operator’s Manual www.javad.com...

  • Page 67: Setting The Clock

    Microsoft ® ActiveSync™ on your computer and establish a partnership. Microsoft® ActiveSync™ allows data exchange between your PC and your Prego receiver’s integrated controller, i.e., copying your personal files or measuring jobs, installing programs on the controller from the PC and so If Microsoft ®...

  • Page 68: Ms Activesync - File->Get Connected

    C O N F I G U R A T I O N Calibrating the Windows® CE Controller 4. Connect the Prego receiver’s integrated controller (RNGR port) to a computer using the Receiver-to-computer serial RS232 cable and a connection adapter (if required).

  • Page 69: Collecting Almanacs

    Each satellite broadcasts a message (almanac) which gives the approximate orbit for itself and all other satellites. If the receiver has an almanac, you can considerably reduce the time needed to search for and lock on to satellite signals. www.javad.com Prego Operator’s Manual 2-33...
  • Page 70 • After loading a new OAF. • After loading new firmware. • After clearing the NVRAM. • Before measuring. The collection and/or update can take as long as 15 minutes. 2-34 Prego Operator’s Manual www.javad.com...

  • Page 71: Prego Setup

    • RTK Base station setup • RTK Rover setup Prego Setup To set up the Prego for measuring you need to: 1. Set up the antenna and measure its height. See “Setup Antenna” on page 3-1 and “Measure the Antenna Height” on page 3-2.

  • Page 72: Measure The Antenna Height

    3-4) antenna offset lines of measurement are shown in the following drawings. The measurements for these offsets follow each drawing (Table 3-1 on page 3-3 for Antenna-2 and Table 3-2 on page 3-4 for Antenna-3). 3-2 Prego Operator’s Manual www.javad.com...

  • Page 73: Antenna Offset Measurements

    S E T U P A N D M E A S U R I N G Prego Setup Figure 3-1. Antenna Offset Measurements Table 3-1. Antenna-2 Offset Measurements A, Vertical C, Slant Offset Antenna Radius Offset (L1) (L1) Antenna-2 0.122m 0.054m 0.021m 0.399 ft 0.176 ft 0.069 ft www.javad.com Prego Operator’s Manual 3-3...
  • Page 74 Phase Center of the antenna. This is analogous to the point at which a distance meter measures in a prism. A user must enter the prism offset to compensate for this point not being at a physical surface of the prism. 3-4 Prego Operator’s Manual www.javad.com...

  • Page 75: Setup Receiver

    This indicates that a file has opened and data collection has started. The REC LED blinks each time data is saved to the internal memory. Tip: You can use PCView to log data. See the PCView User’s Manual for this procedure. www.javad.com Prego Operator’s Manual 3-5...

  • Page 76: Measuring With The Prego

    11. Press and hold the power key until all lights go out, then release. Measuring with the Prego The Prego receiver can be used to perform the following types of measuring: • Static (see “Static Measuring” on page 3-6) • Kinematic (see “Kinematic Measuring” on page 3-8) •...

  • Page 77: Configuration->Receiver->Minpad

    The procedure that follows describes the steps the operator should take to perform a static measuring using MinPad. 1. Connect your receiver and computer. See “Connecting the Prego and a Computer” on page 2-4 for this procedure. 2. Using PCView, click Configuration->Receiver ->MinPad and specify the following parameters, or specify parameters...

  • Page 78: Kinematic Measuring

    • Static mode – enablel Figure 3-5. Advanced->Loop Management 5. Set up the receiver, or an external antenna and receiver, as described in “Prego Setup” on page 3-1. Kinematic Measuring You can use the kinematic measuring method in two ways: •...

  • Page 79: Stop And Go Measuring

    S E T U P A N D M E A S U R I N G Measuring with the Prego Stop and Go measuring The stationary receiver (Base station) is set up at a known point such as a measuring monument. The receiver continually tracks the satellites and logs the raw data into the memory.
  • Page 80 S E T U P A N D M E A S U R I N G Measuring with the Prego Figure 3-6. Rover MinPad Configuration Notice: Remember, both receivers must collect data from the same satellites at the same data recording rate and with the identical elevation mask angles.

  • Page 81: Kinematic Continuous

    S E T U P A N D M E A S U R I N G Measuring with the Prego Kinematic Continuous Kinematic continuous measuring allows the Rover to move without having to stand still, record data, move to another point, and do it all again.

  • Page 82: Real-Time Kinematic Measuring

    10.Stop data logging and turn off the Base station receiver. Real-time Kinematic Measuring Real-time kinematic (RTK) is a differential GPS process where information, such as differential corrections, is transmitted in real-time from a Base station to one or more Prego Rover stations. 3-12 Prego Operator’s Manual www.javad.com...

  • Page 83: Setting Up An Rtk Base Station

    S E T U P A N D M E A S U R I N G Measuring with the Prego Setting up an RTK Base Station To configure a RTK Base station using PCView, take the following steps: 1.Set up the Base station receiver’s antenna as described in “Setup Antenna”...
  • Page 84 Measuring with the Prego 4.Press the power key on the receiver. 5.Check the STAT light for tracked satellites. 6.Connect your receiver and computer. See “Connecting the Prego and a Computer” on page 2-4 for this procedure. 7.Click Configuration->Receiver. 8.Restore the receiver’s default settings. Click the Set all parameters to defaults button located at the bottom of the Receiver Configuration screen (Figure 3-9).

  • Page 85: Receiver Configuration - Positioning

    S E T U P A N D M E A S U R I N G Measuring with the Prego 10.Select the Positioning tab and set the Position Masks, Elevation mask parameter to 15 (Figure 3-10). Figure 3-10. Receiver Configuration – Positioning 11.Select the Base tab and set the following parameters (Figure 3-11 on...
  • Page 86 S E T U P A N D M E A S U R I N G Measuring with the Prego Notice: The reference geodetic coordinates you specify on this tab will relate to the antenna L1 phase center. Figure 3-11. Base Tab Configuration 12.Select the Ports tab and set the following port parameters (Figure 3-...
  • Page 87 S E T U P A N D M E A S U R I N G Measuring with the Prego Figure 3-12. Base Configuration – Ports 13.Click Apply. The receiver begins generating data on the selected port. When using a Pacific Crest PDL (UHF) external modem, follow these steps to configure this modem: 14.When finished with the previous steps, press the power button on...

  • Page 88: Setting Up An Rtk Rover

    Measuring with the Prego Setting up an RTK Rover Use the following steps to set up an Prego RTK Rover station. You should already have programmed the modem. Figure 3-13 shows the hardware setup for a Rover station with the Prego on a bipod.
  • Page 89 S E T U P A N D M E A S U R I N G Measuring with the Prego 5.Select the Rover tab and set the desired Positioning Mode (Figure 3- 14). Figure 3-14. Rover Tab Configuration If you selected RTK Float or RTK Fixed, adjust the following RTK Parameters settings: •...

  • Page 90: Pcview Main Screen

    S E T U P A N D M E A S U R I N G Measuring with the Prego • Input drop-down list – select desired differential correction format. • Period (sec) – leave as is. • Baud rate drop-down list – select a baud rate (i.e., the rate with which differential messages will be transmitted from modem to receiver).
  • Page 91 S E T U P A N D M E A S U R I N G Measuring with the Prego The geodetic coordinates displayed on the Geo tab are always computed in WGS84 and have four solution types: • Standalone •...
  • Page 92 Notes: 3-22 Prego Operator’s Manual www.javad.com...

  • Page 93: Chapter 4: Operation

    PERATION Once you have configured your Prego receiver, operation is simple. This chapter describes standard Prego operating procedures: • Using the MinPad • Using the touch screen and keypad • Downloading Prego files to a computer • Deleting receiver files •...

  • Page 94: Status Led

    Release the FN key while the REC LED is red (during the next three seconds). Pressing the FN key for more than eight seconds has no impact. • After loading new firmware or clearing the receiver’s NVRAM, the receiver checks its internal file system. 4-2 Prego Operator’s Manual www.javad.com...
  • Page 95 Table 4-1 on page 4-4 summarizes FN key functions and REC LED statuses. See “FN Key Mode parameter” on page 2-28 for information on setting FN key modes. www.javad.com Prego Operator’s Manual 4-3...
  • Page 96 If FN key mode is “Occupation mode switch” Release to start recording Green (Kinematic or Static post-processing occupation mode) Press 5–8 Release to turn serial port A baud seconds rate to 9600 bps. Press > 8 No light No function. seconds 4-4 Prego Operator’s Manual www.javad.com...

  • Page 97: Information Modes

    Release to turn serial port A baud seconds rate to 9600 bps. Press > 8 No light No function (data recording still on). seconds Information Modes The Prego MinPad has two information modes: Normal and Extended Information Mode (EIM). www.javad.com Prego Operator’s Manual 4-5...

  • Page 98: Normal

    • Oscillator frequency offset is not more than 3 ppm. • Oscillator's Allan Variance is better than 2.7e-10. • Continuous tracking time is more than 15 minutes. Table 4-2. Signal-to-Noise (S/N) “Good” Ratios CA/L1 P/L1 P/L2 GLONASS 4-6 Prego Operator’s Manual www.javad.com...

  • Page 99: Using The Integrated Controller

    • Red – some tests failed 3.To switch back to normal, press and quickly release the FN key. Using the Integrated Controller The Prego includes an integrated controller that allows you to change settings, enter data, and make selections in the field. Touch Screen Functions The integrated Windows CE controller uses a touch sensitive screen to assist with using the receiver’s software.

  • Page 100: Keypad Functions

    Table 4-3 lists particular keys and their function. Table 4-3. Special Keys and Functions Function Turns the receiver on/off Cancels the current task Activates function in yellow ctrl Shift key Shift key For future implementation For future implementation 4-8 Prego Operator’s Manual www.javad.com...

  • Page 101: Downloading Files To A Computer

    Display Windows CE Task Manager Downloading Files to a Computer The Prego stores files in its on board memory. This memory holds a finite amount of files and information, so downloading the files to your PC or laptop ensures that no files are lost.

  • Page 102: Connection Parameters - Rts/Cts Handshaking

    When your survey finishes, you can download your survey files to a computer for storage, post-processing, or backup. 1. Connect your receiver and computer. See “Connecting the Prego and a Computer” on page 2-4 for this procedure. Enable RTS/CTS handshaking (Figure 4-3).

  • Page 103: Download Files

    To select multiple files, hold down the Shift key and click on nonsequential files to select several files at once; or hold down the Ctrl key and click in individual files. Figure 4-6. Download Files www.javad.com Prego Operator’s Manual 4-11...

  • Page 104: Deleting Files

    Figure 4-7. File Download in Progress Click Exit on the File Manager screen. Click File->Disconnect, then File->Exit to quit PCView (Figure 4-8). Figure 4-8. File->Disconnect then File->Exit Deleting Files Use the following steps to delete files from the Prego receiver. 4-12 Prego Operator’s Manual www.javad.com...

  • Page 105: Connection Parameters - Rts/Cts Handshaking

    O P E R A T I O N Deleting Files 1. Connect your receiver and computer. See “Connecting the Prego and a Computer” on page 2-4 for this procedure. Enable RTS/CTS handshaking (Figure 4-9). Figure 4-9. Connection Parameters – RTS/CTS Handshaking Click File->File Manager (Figure 4-10).

  • Page 106: File->Disconnect Then File->Exit

    Figure 4-11. Delete Files Click Delete. Click Yes at the delete files confirmation dialog box. The selected files will be deleted. Click Exit. Click File->Disconnect, then File->Exit to quit PCView (Figure 4-12). Figure 4-12. File->Disconnect then File->Exit 4-14 Prego Operator’s Manual www.javad.com...

  • Page 107: Checking Options

    RS232 cable, a laptop or PC, and PCView. Refer to the PCView User’s Manual for a more complete description of the PCView software. 1. Connect your receiver and computer. See “Connecting the Prego and a Computer” on page 2-4 for this procedure.

  • Page 108: Option Manager

    • 0 – the receiver option is disabled. • positive integer – the option is enabled. When finished, click Exit on the Option Manager screen, then click File- >Disconnect to prevent conflicts with serial port management. 4-16 Prego Operator’s Manual www.javad.com...

  • Page 109: Loading An Oaf

    >Disconnect to prevent conflicts with serial port management. Managing Prego Memory When using your Prego in static or dynamic applications, it is useful to know the amount of memory occupied by the receiver’s log file. The specific memory size depends on the type of data being recorded. Use the formulas below to compute the approximate size of the receiver’s log files.

  • Page 110: Clearing The Nvram

    (around 15 minutes). Clearing the NVRAM of your receiver will not delete any of the files already recorded in your Prego’s memory. However, it will reset your receiver to factory default values. In addition, the NVRAM is used to keep information about the receiver file system.

  • Page 111: Use Pcview To Clear Nvram

    6. Release the FN key while LEDs blink orange. Use PCView to Clear NVRAM 1. Connect your receiver and computer. See “Connecting the Prego and a Computer” on page 2-4 for this procedure. 2. Click Tools->Clear NVRAM (Figure 4-16). The REC LED rapidly flashes green and red;...

  • Page 112: Sleep Mode

    Checking Firmware Version Sleep Mode Follow these steps to put the Prego into sleep mode. In sleep mode, the power board will continue to draw power from the batteries, causing the batteries to drain over time. Put the receiver in Zero Power Mode to prevent this (see “Zero Power Mode”...

  • Page 113: Help->About

    The Prego receiver should be loaded with firmware version 2.2p1 or newer. CAUTION: Do not use firmware versions 2.2r or older. 1. Connect your receiver and computer. See “Connecting the Prego and a Computer” on page 2-4 for this procedure. Click on Help->About (Figure 4-17). Figure 4-17. Help->About The About PCView dialog box opens (Figure 4-18).

  • Page 114: Loading New Firmware

    You must load all three files when loading new firmware. These files must come from the same firmware package. The Prego uses FLoader, a Windows®-based utility, to load firmware onto the receiver board. You can download FLoader to your computer from the JNS website.

  • Page 115: Set Device Type

    (usually 115200) (Figure 4-19). Click the Device tab and set the Device Type as Receiver (Figure 4-20). Figure 4-20. Set Device Type Click Get from Device for Device Information. www.javad.com Prego Operator’s Manual 4-23...

  • Page 116: Program Tab Settings

    If you selected an incorrect RAM or Flash file, an error message will display at the bottom of the dialog box. Select the correct file. Click the Device tab and set the Device Type as Receiver’s Power Board (Figure 4-22). Figure 4-22. Set Device Type 4-24 Prego Operator’s Manual www.javad.com...

  • Page 117: Program Tab Settings

    Select the correct file. Click File->Exit. Clear the receiver’s NVRAM (see “Clearing the NVRAM” on page 4-18) and update the almanac (see “Collecting Almanacs” on page 2-33) after loading new firmware. www.javad.com Prego Operator’s Manual 4-25...
  • Page 118 Notes: 4-26 Prego Operator’s Manual www.javad.com...

  • Page 119: Chapter 5: Troubleshooting

    Power Problems All Prego receivers are preset in the factory as “Auto Mode” for both the power and charger. If you want to check these settings, connect your receiver to your computer and run PCView.

  • Page 120: Receiver Problems

    Press the Reset key. Zero Power Mode. If no external power Connect a fully charged external power source used, batteries source and retry. See “Powering the Prego” may be discharged. on page 2-2. The receiver has an Charge the batteries overnight. See external power source, “Powering the Prego”...

  • Page 121: Advanced->Multipath

    1. Connect your receiver and a computer for connection is not in using a free port (see “Connecting the Command mode. Prego and a Computer” on page 2-4) and start PCView. Click Configuration Receiver Ports. Change the Input for the serial port used for connection to Command.
  • Page 122 • If the receiver should function as a Base, configured as a Base or ensure it has the proper configuration. Rover. See “Measuring with the Prego” on page 3-6 for further information. • If the receiver should function as a Rover, ensure it has the proper configuration.
  • Page 123 1. Connect your receiver and a used at the Base and computer and start PCView. See Rover receivers. “Connecting the Prego and a Computer” on page 2-4. 2. Click Configuration Receiver Ports and set the same input/output format for both receivers.
  • Page 124 • Attach an external power source to the low. receiver. See “External Batteries” on page 2-2. • See “Powering the Prego” on page 2-2 The distance between • Close the distance between the Base and Base and Rover is too Rover.

  • Page 125: Creating Scripts

    Navigate to the folder in which you want to save the script file. Type a file name. All files have a .jpc extension. For example, Daisy_38400.jpc to enable the daisy chain and Daisy_Off.jpc to disable the daisy chain. Click Yes to create the file. www.javad.com Prego Operator’s Manual A-1...

  • Page 126: Click Load

    Click Close Editor. Once you have created a script file, 1. Click Load Script on the Manual Mode dialog box. Navigate to the folder that contains your script file. Select the appropriate script file and click Load. A-2 Prego Operator’s Manual www.javad.com...

  • Page 127: Prego Specifications

    Windows® CE controller with touch screen and keypad, internal PDL/UHF radio, two batteries, and a power board, all contained in a rugged aluminum housing complete with MinPad and cable connectors. Prego Specifications This section lists Prego component details. Table B-1. Prego Specifications Component Details Receiver Type Euro-GGD –...
  • Page 128 A P P E N D I X Prego Specifications Table B-1. Prego Specifications Component Details Measuring Mode Static Kinematic (Continuous, Stop and Go) RTK (Real-time Kinematic) DGPS (Differential GPS) Measuring Accuracy Static For L1+L2 – H: 3mm + 1ppm x D;...
  • Page 129 A P P E N D I X Prego Specifications Table B-1. Prego Specifications Component Details Data Collector Integrated Windows® CE controller w/touch screen and keypad Status Indicator Two, three-color LED’s and three-function keys Communication Up to four serial RS-232 ports, USB, and Ethernet...
  • Page 130 A P P E N D I X Prego Specifications Table B-1. Prego Specifications Component Details Change battery Not detachable battery Operating time ~15 hours with UHF PDL Radio ON ~20 hours with UHF PDL Radio OFF External power 1 port...
  • Page 131 A P P E N D I X Prego Specifications Table B-1. Prego Specifications Component Details Output interval for 1, 5, 10, 20 (5 to 20 Hz is optional) RTCM correction data Elevation mask 0 to 90 deg (independent with data logging...
  • Page 132 A P P E N D I X Prego Specifications Table B-1. Prego Specifications Component Details Ambiguity fixing Selectable the thresholds Low: 95%, Medium: level 99.5%, High: 99.9% PPS Output (optional) Number of PPS port Edge Rise, Fall Period 10–1000000000 ms Offset -500000000–500000000 msec...
  • Page 133 A P P E N D I X Prego Specifications Table B-1. Prego Specifications Component Details Input AC 90–264 V 1A (110 V AC) 47–63 Hz Output DC 12 V 2.5 A (30 W) Connector Input (AC): Outlet Output (DC): Fisher 5Pin...

  • Page 134: Connector Specifications

    A P P E N D I X Connector Specifications Connector Specifications This section lists Prego connector details. Power Connector The power connector (Figure B-1) is a sealed receptacle, 5 pin connector with ODU part number G80F1C-T05QF00-0000. Figure B-1. Power Connector Table B-2 gives power connector specifications.

  • Page 135: Serial Rs232 Connector

    Figure B-2. RS232 Connector Table B-3gives the RS232 connector specifications. Table B-3. RS232 Connector Specifications Number Signal Name Details Power_OUT Power Output (I<0.2 A) Signal ground Clear to send Request to send Receive data Transmit data Not used www.javad.com Prego Operator’s Manual B-9...

  • Page 136: Serial Rngr Connector

    The Pacific Crest PDL (UHF) modem connector type is a BNC Bulkhead Jack RF connector with an Applied Engineering Product part number of 6501-7051-003. Table B-5. Pacific Crest PDL (UHF) Modem Connector Specifications Type Signal Name Details Modem I/O RF input from PDL antenna B-10 Prego Operator’s Manual www.javad.com...

  • Page 137: Gps External Antenna Rf Connector

    The USB connector (Figure B-4) is a sealed receptacle, 5 pin connector with ODU part number G80F1C-T05QF00-0000. Figure B-4. USB Connector Table B-8 gives the USB connector specifications. Table B-8. USB Connector Specifications Number Signal Name Details Not used www.javad.com Prego Operator’s Manual B-11...

  • Page 138: Ethr Connector

    Table B-9. ETHR Connector Specifications Number Signal Name Details Not used Ground (Link LED cathode) TXD+ Transmit data plus TXD- Transmit data minus RXD+ Receive data plus RXD- Receive data minus LINKLED Link LED anode B-12 Prego Operator’s Manual www.javad.com...

  • Page 139: Event And 1Pps Connectors

    A P P E N D I X Connector Specifications EVENT and 1PPS Connectors The EVENT and 1PPS connectors are coaxial female receptacles of BNC series, Kings Electronics part number KC-79-108. These connectors are optional. www.javad.com Prego Operator’s Manual B-13...
  • Page 140 Notes: B-14 Prego Operator’s Manual www.javad.com...

  • Page 141: Safety Warnings

    – W ITHOUT PROPER SAFEGUARDS AT THE MEASURING SITE – C ONTRARY TO APPLICABLE LAWS RULES REGULATIONS REGO SHOULD NEVER BE USED IN DANGEROUS ENVIRONMENTS SE IN RAIN OR SNOW FOR A LIMITED PERIOD IS PERMITTED www.javad.com Prego Operator’s Manual C-1...

  • Page 142: Internal Battery Pack Warnings

    CAUTION: The owner should periodically test this product to ensure it provides accurate measurements. CAUTION: Inform JNS immediately if this product does not function properly. C-2 Prego Operator’s Manual www.javad.com...
  • Page 143 A P P E N D I X Safety warnings Only allow authorized JNS warranty service centers to CAUTION: service or repair this product. www.javad.com Prego Operator’s Manual C-3...
  • Page 144 Notes: C-4 Prego Operator’s Manual www.javad.com...

  • Page 145: Using The Radio

    RTK communications. A 35 Watt base radio will allow your Prego system to reach distances of up to 12 miles using the standard antenna, depending on the local conditions. Distances in the order of 4 to 7 miles (6 to 11 km) are easily reached.
  • Page 146 • Check out the JNS accessory line for various items to elevate your Base radio. • Check out the JNS accessory line for and external, “rubber-duck” UHF antenna. D-2 Prego Operator’s Manual www.javad.com...

  • Page 147: Warranty Terms

    1. The warranty against defects in JNS battery, charger, or cable is 90 days. www.javad.com Prego Operator’s Manual E-1...
  • Page 148 Notes: E-2 Prego Operator’s Manual www.javad.com...
  • Page 149 Charge internal batteries 2-20 Daisy chain 4-23 Check firmware version 2-34 Data recording auto-start 4-16 Checking options 4-14–4-15 Delete files 4-19, 4-28 Clear NVRAM 1-7, 3-15 Differential corrections 4-20 w/ MinPad 3-24, 3-25 LQ field www.javad.com Pego Operator’s Manual Index...
  • Page 150 1-18 Front panel static 3-10 stop and go Measuring 1-10, 2-21 3-10 GRIL reference manual kinematic 3-13 kinematic continuous 3-15 3-7–3-10 static Information mode 3-10 stop and go see also Receiver modes 4-19 Memory Index Pego Operator’s Manual www.javad.com...
  • Page 151 Set clock 1-13 SHMM 2-21 configuration Slant height measure mark 1-9, 2-19 software see SHMM 1-9, 2-19 PDLCONF 4-21 Sleep mode 2-21 program Software Power 1-9, 2-37–2-40 ActiveSync 1-14 board 1-9, 4-24, 4-25 FLoader charger www.javad.com Pego Operator’s Manual Index...
  • Page 152 System range 1-5, 4-6, C-3 Test 4-6–4-7 1-16 Top panel 1-18, 2-36, 4-7 Touch screen Trajectory measuring see Kinematic continuous measuring Turn on/off controller receiver Warnings battery pack xvii convention general usage 4-22 Zero power mode Index Pego Operator’s Manual www.javad.com...

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