Topcon PC-CDU User manual

PC-CDU
User’s Manual
Reflects PC-CDU Version 2.1.10 MS (Build: pril 1, 2002)
Last Updated: ugust 6, 2002
Copyright  Topcon Positioning Systems, Inc 2002
ll rights reserved

ii
INTRODUCTION / TERMS AND CONDITIONS
Thank you for purchasing your Topcon receiver. The materials available in this Manual (the "Manual") have
been prepared by Topcon Positioning Systems, Inc. (“TPS”) for owners of Topcon products. It is designed
to assist owners with the use of PC-CDU software (which may be used with the Topcon receiver) and its use
is subject to these terms and conditions (the “Terms and Conditions”).
PLEASE READ THESE TERMS AND CONDITIONS CAREFULLY.
PROFESSIONAL USE. Topcon receivers are designed to be used by a professional. The user is required to
be a professional surveyor or have a good knowledge of surveying, in order to understand the user and
safety instructions before operating, inspecting or adjusting. Always wear the required protectors (safety
shoes, helmet, etc.) when operating the receiver.
COPYRIGHT. All information contained in this Manual is the intellectual property of, and copyrighted mate-
rial of TPS. All rights are reserved. One 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 the express written consent of TPS and may only use such information for the
care and operation of your Receiver. The information and data in this Manual are a valuable asset of TPS
and are developed by the expenditure of considerable work, time and money, and are the result of original
selection, coordination and arrangement of TPS.
TRADEMARKS. Topcon® is a registered trademark of Topcon Corporation. Windows® is a registered
trademark of Microsoft Corporation. WinZip® is a registered trademark of Nico Mak Computing, Inc. Prod-
uct and company names mentioned herein may be trademarks of their respective owners.
DISCLAIMER OF WARRANTY: EXCEPT FOR ANY WARRANTIES IN A WARRANTY CARD ACCOMPANYING
THE RECEIVER, THIS MANUAL AND THE RECEIVER ARE PROVIDED “AS-IS.” THERE ARE NO OTHER WAR-
RANTIES. TPS DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PAR-
TICULAR USE OR PURPOSE. TPS AND ITS DISTRIBUTORS SHALL NOT BE LIABLE FOR TECHNICAL OR
EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN; NOR FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE OR USE OF THIS MATERIAL, THE SOFT-
WARE OR THE RECEIVER. SUCH DISCLAIMED DAMAGES INCLUDE BUT ARE NOT LIMITED TO LOSS OF
TIME, LOSS OR DESTRUCTION OF DATA, LOSS OF PROFIT, SAVINGS OR REVENUE, OR LOSS OF THE
PRODUCT’S USE. IN ADDITION TPS IS NOT RESPONSIBLE OR LIABLE FOR DAMAGES OR COSTS IN-
CURRED IN CONNECTION WITH OBTAINING SUBSTITUTE PRODUCTS OR SOFTWARE, CLAIMS BY OTH-
ERS, 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 RECEIVER.
LICENSE AGREEMENT.Use of the PC-CDU Software and any other computer programs or software supplied
by TPS or downloaded from a TPS website (the “Software”) in connection with a Topcon receiver consti-
tutes acceptance of these Terms and Conditions in this Manual and an agreement to abide by these Terms
and Conditions. The user is granted a personal, non-exclusive, non-transferable license to use such Soft-
ware under the terms stated herein and in any case only with a single receiver or single computer. You
may make one (1) backup copy of the Software. Otherwise, the Software may not be copied or repro-
duced. You may not assign or transfer the Software or this license without the express written consent of
TPS. This license is effective until terminated. You may terminate the license at any time by destroying the
Software and Manual. TPS may terminate the license if you fail to comply with any of the Terms or Condi-
tions. You agree to destroy the Software and manual upon termination of your use of the receiver. All
ownership, copyright and other intellectual property rights in and to the Software belong to TPS. If these li-
cense terms are not acceptable, return any unused Software and manual.
CONFIDENTIALITY. This Manual, its contents and the Software (collectively, the “Confidential Informa-
tion”) are the confidential and proprietary information of TPS. You agree to treat Confidential Information of
TPS with a degree of care no less stringent that the degree of care you would use in safeguarding your own
most valuable trade secrets. Nothing in this paragraph shall restrict you from disclosing Confidential Informa-
tion to your employees as may be necessary or appropriate to operate or care for the receiver. Such employ-
ees must also keep the Confidential 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 protec-
tive order or other appropriate remedy.

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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 contractor of TPS
modifies these Terms and Conditions (including the Software license, warranty and limitation of liability).
SAFETY. Improper use of a Topcon receiver can lead to injury to persons or property and/or malfunction of
the product. The receiver should only be repaired by authorized TPS warranty service centers. Users
should review and heed the safety warnings in the manual accompanying the receiver.
MISCELLANEOUS. The above Terms and Conditions may be amended, modified, superseded, or canceled,
at any time by TPS. The above Terms and Conditions will be governed by, and construed in accordance
with, the laws of the State of California, without reference to conflict of laws.

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Contents
1. PC-CDU SOFTWARE ........................................................................................................................1
1.1. PC-CDU’s purposes and functions...............................................................................................1
1.2. Typographic conventions...........................................................................................................2
1.3. Terminology and notation..........................................................................................................3
1.4. What information can be found in this document? .......................................................................4
1.5. System requirements ................................................................................................................4
1.6. Full- and limited-functionality versions of PC-CDU........................................................................4
1.7. Technical Support.....................................................................................................................5
2. SETTING UP PC-CDU .......................................................................................................................6
2.1. Installing PC-CDU .....................................................................................................................6
2.2. Removing PC-CDU ....................................................................................................................8
3. STARTING PC-CDU .........................................................................................................................9
3.1. How to start up PC-CDU............................................................................................................9
3.1.1. Direct Mode.....................................................................................................................10
3.1.2. ‘Internet Server’ Mode ...................................................................................................... 11
3.1.3. ‘Internet Client’ Mode .......................................................................................................13
3.2. How to close PC-CDU.............................................................................................................. 14
4. LEARNING PC-CDU IN DETAIL .......................................................................................................... 16
4.1. Main window..........................................................................................................................16
4.1.1. Geo tab...........................................................................................................................18
4.1.2. XYZ tab...........................................................................................................................20
4.1.3. Target tab ....................................................................................................................... 20
4.2. The Main window’s menu ........................................................................................................ 21
4.2.1. ‘File Manager’ window ...................................................................................................... 21
4.2.1.1. Download files........................................................................................................... 22
4.2.1.2. The ‘Current log file’ tab.............................................................................................25
4.2.1.3. ‘Download path’ tab................................................................................................... 27
4.2.2. ‘Real-Time Logging’ dialog window ....................................................................................27
4.2.2.1. ‘Single file’ tab........................................................................................................... 28
4.2.2.2. ‘Multiple files’ tab....................................................................................................... 29
4.2.3. ‘Manual Mode’ window...................................................................................................... 33
4.2.4. ‘Receiver Configuration’ window ........................................................................................34
4.2.4.1. General..................................................................................................................... 35
4.2.4.2. MINTER....................................................................................................................39
4.2.4.3. Positioning ................................................................................................................42
4.2.4.4. Base......................................................................................................................... 47
4.2.4.5. Rover .......................................................................................................................50
4.2.4.6. Ports ........................................................................................................................54
4.2.4.7. Events ......................................................................................................................57
4.2.4.8. Advanced.................................................................................................................. 59
4.2.5. Site Configuration window ................................................................................................66
4.2.6. Target Position window ....................................................................................................66
4.2.7. RFM96 Configuration window ............................................................................................67
4.2.8. Initialize file system..........................................................................................................69
4.2.9. Clear NVRAM ...................................................................................................................70
4.2.10. Reset receiver ..............................................................................................................70
4.2.11. Option Manager window................................................................................................ 71
4.2.12. Scatter window............................................................................................................. 72
4.2.13. Satellites window ..........................................................................................................74
4.2.14. Position window............................................................................................................ 75
4.2.15. Plots Configuration window............................................................................................ 76
4.2.16. About PC-CDU ..............................................................................................................77

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APPENDIX A. PC-CDU SCRIPTS ..................................................................................................................79
Introduction to PC-CDU scripts ..........................................................................................................79
Variables .........................................................................................................................................80
PC-CDU commands...........................................................................................................................80
Receiver commands..........................................................................................................................82
Running scripts from Windows Explorer..............................................................................................83
APPENDIX B. OUTPUT PERIOD SETUP WIZARD ................................................................................................ 84
APPENDIX C. CHANNEL NAVIGATION STATUS CODES ......................................................................................... 87

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List of Figures
Figure 1. Dialog box “Enter Network Password” ................................................................................6
Figure 2. Dialog box “File Download”.......................................................................................................7
Figure 3. Select a destination for the archive pccdu_ms.zip ..........................................................................7
Figure 4. Copying data from the website to your computer’s disk drive.......................................................8
Figure 5. “Connection Parameters” dialog ..............................................................................................10
Figure 6. “Connection Parameters” window in Internet Server mode ........................................................12
Figure 7. “Connection Parameters” window in Interne t Client mode ...................................................14
Figure 8. “Chat” window.......................................................................................................................14
Figure 9. Main window .........................................................................................................................16
Figure 10. “Geo” tab ............................................................................................................................18
Figure 11. “XYZ” tab ............................................................................................................................20
Figure 12. “Target” tab ........................................................................................................................20
Figure 13. The Main window’s menu......................................................................................................21
Figure 14. “Download files” tab.............................................................................................................22
Figure 15. Message notifying that a file with the same name already exists ..............................................23
Figure 16. Message notifying that a problem occurred while retrieving the current block of data from the
receiver........................................................................................................................................23
Figure 17. “Current log file” tab.............................................................................................................25
Figure 18. “Site Configuration” dialog box ..............................................................................................26
Figure 19. “Download path” tab ............................................................................................................27
Figure 20. “Real-Time Logging” dialog window .......................................................................................28
Figure 21. “Multiple files” tab ................................................................................................................29
Figure 22. Generation of multiple files ...................................................................................................30
Figure 23. “Overwrite existing files?” warning........................................................................................31
Figure 24. “Converter to RINEX Setup” window ......................................................................................32
Figure 25. “Manual Mode” window ........................................................................................................33
Figure 26. “General” tab.......................................................................................................................35
Figure 27. “MINTER” tab ......................................................................................................................39
Figure 28. “Positioning” tab ..................................................................................................................42
Figure 29. “<DATUM ID> Datum Parameters” window ...........................................................................43
Figure 30. “GPS” tab.........................................................................................................................45
Figure 31. “GLONASS” tab ....................................................................................................................45
Figure 32. “WAAS” tab .........................................................................................................................46
Figure 33. “Base” tab ...........................................................................................................................47
Figure 34. “Rover” tab..........................................................................................................................50
Figure 35. “Ports” tab...........................................................................................................................54
Figure 36. “Parallel” subtab ..................................................................................................................56
Figure 37. “Modem” subtab ..................................................................................................................56
Figure 38. “Events” tab ........................................................................................................................57
Figure 39. “Advanced” subtab...............................................................................................................59
Figure 40. “Multipath Reduction” tab .....................................................................................................60
Figure 41. “Loops Management” subtab.................................................................................................61
Figure 42. “External Frequency” subtab .................................................................................................62
Figure 43. “Raw Data Management” subtab ...........................................................................................64
Figure 44. “Options” subtab..................................................................................................................66
Figure 45. “Target Position” window......................................................................................................66
Figure 46. RFM96 item .........................................................................................................................67
Figure 47. “Connect” tab ......................................................................................................................67
Figure 48. Operations the user should take in Power cycle mode .............................................................68
Figure 49. “Configuration” tab. PDL configuration settings....................................................................... 68
Figure 50. “Configuration” tab. Recommended settings. ..........................................................................69
Figure 51. “Initialize File System?” warning ............................................................................................69

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Figure 52. “Reset receiver?” warning ..................................................................................................... 70
Figure 53. “Option Manager” window .................................................................................................... 71
Figure 54. “Scatter” window .................................................................................................................72
Figure 55. “Satellites” window...............................................................................................................74
Figure 56. Pop-up menu, reflecting the information about the selected satellite......................................... 75
Figure 57. “Position” window ................................................................................................................ 75
Figure 58. “Plots Configuration” window ................................................................................................ 76
Figure 59. “About PC-CDU” window.......................................................................................................77
Figure 60. Wizard’s 1st window.............................................................................................................84
Figure 61. Wizard’s 2nd window............................................................................................................85
Figure 62. Wizard’s 3rd window ............................................................................................................ 85
Figure 63. Wizard’s 4th window ............................................................................................................ 86
Figure 64. Wizard’s 5th window ............................................................................................................ 86

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List of abbreviations, acronyms and other notation used in
this manual
ARP – Antenna Reference Point
CMR – A format used to transmit differential corrections and related data from the Base receiver to
the Rover receiver in DGPS and RTK applications
C/A – Coarse Acquisition code
DGPS – Differential GPS
DLL – Delay Lock Loop
DNS – Domain Name System
GUI – Graphical User Interface
IP – Internet protocol
LO – Local Oscillator
MINTER – Minimum INTERface. A dedicated user interface designed for TPS receivers
NS – Navigation Satellite
P – Precise code
PC – Personal Computer
PLL – (Carrier) Phase Lock Loop
PLLC – (Carrier) Phase Lock Loop Control
PS – Pseudorandom Sequence
Receiver – Satellite Navigation User Receiver developed and manufactured by TPS
RMS – Root-mean-square
RNSS – Radio Navigational Satellite System
RTCM – (Radio Technical Commission for Maritime Services). This format is used to transmit
differential corrections and related data from the Base receiver to the Rover receiver in DGPS and
RTK applications
RTK – Real-time kinematic
SW – software
VCO – Voltage Control Oscillator

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1. PC-CDU software
1.1. PC-CDU’s purposes and functions
PC-CDU is a windows application for controlling radio navigation receivers developed and manufac-
tured by the Topcon Positioning Systems company.
The most current version of PC-CDU MS (as of 2.1.10, April 1, 2002) provides the following func-
tions:
• Connects a PC to a TPS receiver via the computer’s serial or parallel ports (
Direct Con-
nection Mode
).
• Configures a TPS receiver as an “Internet Server”. To do this, the user must run PC-
CDU in
Internet Server Mode .
• Connects a PC to a TPS receiver that has been configured and is being run in
Server
Mode
via the Internet. In this case the user must run his/her PC-CDU in Internet Client
Mode
.
• Keeps track of the total number and the status of all visible satellites.
• Displays the receiver’s current position and time in real time.
• Controls the recording of raw data measurements into the receiver’s internal memory.
• Downloads collected raw data measurements (log files) from the receiver’s internal
memory onto the computer’s disk drives.
• Records, in real time, the receiver’s raw data measurements on the computer’s disk in
JPS and RINEX formats (using the executable file jps2rin.exe).
• Displays, in real time, the graph of the receiver’s current position and the satellite sky
plot.
• Allows displaying and programming the receiver’s main settings (such as
Data Re-
cording Interval
, Position Computation Mode , etc.).
• Allows display of the current receiver options and loading of
Option Authorization Files .

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1.2. Typographic conventions
Table 1 specifies all typographic conventions used in this manual.
Table 1. Document conventions
Example Description
Clock offset This format is used in definitions or when it is
necessary to emphasize that the marked term
is technical jargon.
Select from the File… menu Titles of dialog windows/boxes, names of menu
options and other GUI components.
Press CTRL+V This format is used to specify keys and key
combinations.
Type the string 194.85.135.59. This format is used to enter various string in-
formation (e.g., file and directory names) as
well as user commands.
To clear the NVRAM:
1. Select the option Clear NVRAM from
the Tools menu…
This format is used to describe the sequence of
steps that the user must take.
Note…
The user is recommended to take note of the
given information.
Some good hints…
These hints and tips will help the user learn the
program faster.
Caution! By no means use…
The user is warned about possible errors.

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1.3. Terminology and notation
Table 2 shows what terminology and notation are used for standard Windows GUI components in
this manual.
Table 2. Тerms used in this manual to describe standard Windows GUI components
GUI component Term
Button
Edit box or indicator
Selected checkbox
Unselected checkbox
Selected radio button
Unselected radio button
Progress bar
Status bar
Spin button
File List box
Drop-down list box
Menu
Tab Control

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1.4. What information can be found in this document?
This document provides all information necessary for the user to comprehensively learn PC-CDU be-
fore installing and using this software.
In Chapter 2, the reader will find detailed instructions about how to install PC-CDU on a PC.
Chapter 3 explains how to launch the program.
Chapter 4, which is intended as a
user’s reference manual , focuses on the particular functions this
program features.
The appendixes provide supplementary information about PC-CDU:
Appendix A. PC-CDU Scripts introduces readers to the scripts and describes how to use them.
Appendix B. Output Period Setup Wizard presents the windows, which are used to adjust the peri-
ods of generating raw data and position.
Appendix C. Channel Navigation status codes shows the list of all available satellite navigation
status codes.
1.5. System requirements
Check that you have the following required (or recommended) items before installing and using PC-
CDU.
• PC-compatible with Intel® Pentium® 100 MHz or faster.
• 5 Мbyte free disk space.
• 16 Мbyte RAM or more (32 Мbyte recommended).
• 32-bit operating system such as MS Windows 95/98/Me/NT/2000.
• Color monitor at 640x480 screen resolution.
• Internet Server/Client applications require that your computer has an internet connec-
tion.
If run on a Windows NT/2000 computer, PC-CDU does not allow connection to the
receiver via the computer’s parallel ports.
1.6. Full- and limited-functionality versions of PC-CDU
PC-CDU exists in two implementations: the full-functionality version called PC-CDU MS, and the
reduced-functionality version called PC-CDU Lite. Differences between PC-CDU MS and PC-CDU
Lite are listed in Table 3.

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Table 3. Differences between PC-CDU MS and PC-CDU Lite
Function PC-CDU MS PC-CDU Lite
Connect to a receiver via the Internet Yes No
Record data on a PC’s disk drive in real time
(“Real-Time Data Logging”) Yes No
Graphical presentation
of the receiver’s current position &
the satellite sky plot
Yes No
Each version of PC-CDU MS has a limited lifetime as a full-functionality tool. After
the current version of PC-CDU MS expires, its extended functions (see Table 2)
are automatically disabled so that PC-CDU MS “turns into” PC-CDU Lite.
1.7. Technical Support
Occasionally, PC-CDU users encounter problems during installation or use of the program.
Should you have any problems with PC-CDU, please contact TPS Customer Support.
Please be ready to provide TPS Customer Support with the following information:
• Did you try to fix the problem(s) on your own based on the troubleshooting tips avail-
able in the manual?
• System/hardware specifications of the computer on which you are running (installing)
your PC-CDU.
• ASCII file with a complete list of the receiver options/receiver parameters enabled in
your receiver.
For how to obtain a text file listing all receiver options and parameters, please
refer to 4.2.16.
To get in contact with TPS Customer Support, please use the following e-mail addresses:
[email protected] or [email protected].

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2. Setting up PC-CDU
2.1. Installing PC-CDU
There is no special installer for the current version of PC-CDU. This tool is a ready-to-run executa-
ble.
To install PC-CDU on you computer, take the following steps:
1. Visit the TPS section (http://www.topcongps.com/) of the Topcon website page. Click on
the Software link in the top-left corner of the window. Next, select the Software
Downloads link. Finally, click on the link Click here to download pccdu_ms.zip to start
data downloading.
To download PC-CDU Lite, select the Utilities link on the Software
Center page.
2. You will see the dialog box Enter Network Password appears on the screen. You are
prompted to enter a username and password. After you type in this information, press OK
(Figure 1).
Figure 1. Dialog box “Enter Network Password”
PC-CDU Lite is a freely available software. Thus, when you install PC-CDU Lite, the
Enter Network Password prompt will not appear on the screen.

7
3. The File Download dialog box will be opened. To continue the download process,
press Save (Figure 2).
Figure 2. Dialog box “File Download”
4. Use the dialog window Save As to specify the desired destination (disk drive/folder) for the ar-
chive pccdu_ms.zip (Figure 3).
Figure 3. Select a destination for the archive pccdu_ms.zip

8
5. Wait while the archive is being downloaded onto your system (Figure 4).
Figure 4. Copying data from the website to your computer’s disk drive.
6. Create a folder on your local disk drive1.
7. Unpack the archive into this folder with WinZip® or another appropriate software.
You will see the following files appear in the folder:
• Executable file Pccdu.exe;
• Auxiliary binary file lptaccess.vxd.
2.2. Removing PC-CDU
The simplest way to remove PC-CDU from a system is to delete the whole directory2that was cre-
ated when installing PC-CDU and in which Pccdu.exe and other PC-CDU related files reside. Also, do
not forget to delete the PC-CDU shortcut, if available.
1It is recommended to use C:\Program Files\TPS\PC-CDU
2Assuming this directory is not used for storing any other (i.e., PC-CDU-unrelated) data.

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3. Starting PC-CDU
3.1. How to start up PC-CDU
PC-CDU can be launched, as any other windows program, in one of the following ways:
WAY # 1.
Double-click on PC-CDU’s shortcut on the desktop (if it has been created).
WAY # 2.
In Windows Explorer go to the directory where Pccdu.exe resides and double-click on the corre-
sponding icon.
WAY # 3.
Press the Start button in the bottom-left corner of your computer’s screen and select Run
from the pull-up menu. In the Open box specifies the full path to Pccdu.exe. Press OK.
After you first run PC-CDU, you will see the file pccdu.ini appear in the directory
from which the executable has been launched. In this .INI file PC-CDU will store
all its settings.
If you want to have more than one copy of PC-CDU, each one with its own unique
settings, you will need to keep these copies in
different directories. Running dif-
ferent copies of PC-CDU from different directories will allow you to maintain
unique setting for each of the copies.
Once PC-CDU is launched, the Connection Parameters window will appear (Figure 5). In
this window the user first selects the desired
connection mode :
• Direct
• Internet Client
• Internet Server

10
Figure 5. “Connection Parameters” dialog
3.1.1. Direct Mode
This mode is used when it is required to connect a computer and a TPS receiver directly , (i.e., using
the computer’s serial or parallel port and an appropriate cable) (see Figure 5).
To connect your computer to the receiver in Direct mode:
1. Select from the Port list box the serial (COM1, COM2, ...) or parallel (LPT1, ...) port that you want
to use for the connection.
2. From the Baud Rate list box, select the desired baud rate.
The checkbox Infrared port is selected when you want to use an infra-red
adaptor to establish a connection between your computer and receiver over an in-
frared data-link.
Connection via an infrared port will be available only if the following conditions are
met:
• An appropriate external infrared adaptor is connected to the selected serial port on the
computer side.
• Your receiver supports the infrared port hardware-wise.
• The Infrared Port option is enabled in your receiver.

11
3. Select the RTS/CTS handshaking checkbox (optionally).
It is strongly recommended that you select the RTS/CTS checkbox as this makes
data exchange between the receiver and computer more reliable. Prior to select-
ing this option, make sure that:
• RTS/CTS handshaking is supported both at the computer and at the receiver.
• The cable used allows RTS/CTS handshaking.
4. Press Connect.
Along with the above listed options, the user may need to adjust some of the settings in the
Program Settings panel. This panel includes the following three options:
• Passive mode
• Manual mode only
• Restore the receiver’s original baud rate on Disconnect
In Passive mode PC-CDU is not allowed to change any receiver parameters. Note that in this
mode PC-CDU will display in the main window only those satellites whose elevation angles are lar-
ger than the elevation mask specified by the parameter Terminal Elevation Mask (see
4.2.4.1). Once Passive mode is off, PC-CDU will automatically force Terminal Elevation
Mask to -90º. Therefore the user will be able to view in PC-CDU’s main window (see 4.1) all of
the satellites that are being tracked. It is important to remember that this setting (-90º) will be ef-
fective as long as the main window remains open. Note however that the original value of
Terminal Elevation Mask will not be lost in this case; once the main window is closed, PC-
CDU will automatically restore the original mask.
If Manual mode only is on, PC-CDU will perform as an input/output terminal, which allows the
user to send commands to and receive information from the receiver.
If the user has selected the checkbox Restore the receiver’s original baud rate on
Disconnect, PC-CDU will determine and save the receiver’s original baud rate and then restore
this setting automatically on disconnecting the receiver (by pressing the Disconnect menu
item).
3.1.2. ‘Internet Server’ Mode
When running PC-CDU in Internet Server mode, the user can configure a TPS receiver3to
perform as a
PC-CDU server . Remote receivers (PC-CDU clients) can then access this PC-CDU-
server via the Internet4.
The parameters Port, Baud rate, Infrared port, RTS/CTS handshaking, Passive
mode and Manual mode serve the same purposes as in Direct mode (see 3.1.1). The other
3It is assumed that the receiver is connected to your computer directly.
4This version allows a TPS receiver configured as PC-CDU-server to be accessed by only one remote re-
ceiver (PC-CDU-client) at a time.

12
group of parameters, Internet Settings, are intended for the user to tune PC-CDU
for Internet connection: TCP port, Password, Log server events, Display data on
server and DNS lookup.
Special attention should be given to setting TCP port for PC-CDU servers5. Make sure that the
selected TCP port does not coincide with any one of the reserved port numbers. The default TCP
port number is 8000.
The edit box Password is used to protect the PC-CDU server from unauthorized access. The user
can enter in this edit box up to 128 alphanumeric characters.
If the user has selected the checkbox Log server events, there will be created a text log file
(pccdu_server.log) in PC-CDU’s working directory. This file will contain all the information that has
been collected during the communication session between the PC-CDU server and PC-CDU client.
New information will be added to the file after another client connects to the PC-CDU server.
If the user wants to view the satellite information and the antenna’s current position in the main
windows, he/she must select the Display data on server checkbox. Otherwise no informa-
tion will be displayed in the window.
If the checkbox DNS lookup is selected, the file pccdu_server.log will contain the IP and DNS ad-
dresses.
Figure 6. shows an example of the Connection Parameters dialog window in Internet
Server mode.
Figure 6. “Connection Parameters” window in Internet Server mode
In this example a four-character password and the default TCP port number are
used.
5According to TCP specifications, TCP port number can be up to 64К. Although the user can formally enter a
port number N, which is greater or equal to 64К, the software will implicitly force it to N mod 64К.