User Guide
Table Of Contents
- Contents
- 1 Preface
- 2 Features
- 3 Getting Started
- 4 Concept and Philosophy
- 5 u-center Menus and Windows
- 5.1 Main frame and toolbars
- 5.2 Views and windows
- 6 NTRIP
- 7 Google Earth server
- 8 Tools
- 9 How To
- 10 Troubleshooting
- 11 Related Documents
- 12 Revision History
u-center-User Guide
UBX-13005250 - R18
Production Information 4 Concept and Philosophy
Page 13 of 67
Figure 7: Relation between operating modes
4.2.1 Online mode
In this mode a GNSS device is directly connected to u-center via a COM port. u-center can control and configure
the receiver and it will display the data that the receiver is sending periodically.
4.2.2 Stop mode
In this mode no data from a receiver or a log file is forwarded to the database and views. u-center is in this mode
when a log file is open but player and recorder are not active.
4.2.3 Record mode
Record Mode is the same mode as the Online Mode, except u-center additionally creates a log file, concatenating
all the messages sent by the receiver. You enter this mode by creating a new log file or opening an existing log
file without write protection and pressing the record button. An example of using this mode would be to make
overnight measurements and evaluate the data at a later time. u-blox customer support may request a log file
from you when you are experiencing a problem with one of our receivers and will usually need this to be recorded
with debug data enabled (see Receiver.
4.2.4 Play mode
The Play Mode allows replaying a previously recorded log file step by step, in real-time or at an accelerated rate.
You enter this mode by opening a file and pressing the play, step or scan button.
4.2.5 Relations between modes
The operating mode depends on the status of the log file player. Modes are changed by user actions. Each mode
has different states that are changed by a user action or by an event (see Figure 7). In Online mode and Record
mode, u-center displays data from the receiver. In Play mode data from a log file is displayed. Play mode has
different states:
• Play reads and displays messages periodically from the log file. The user interface is derived from that of
a CD player. u-center updates the views after each message.
• Step gets one message from the log file and immediately returns to paused Play state.
• Scan reads messages periodically but the display is only updated when paused or by changing the state.