Jeppesen FliteDeck 3 - Manual (Page 207)

JeppView FliteDeck User's Guide
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2. Click the Hardware tab (Windows 2000 and XP only).
3. Click Device Manager.
4. Click the plus sign (+) beside Ports (COM &LPT).
5. The COM port number appears behind the USB Serial Port device.
NOTE
If your computer has several USB ports and you plug the receiver into a
different port than the port Windows originally assigned, then Windows
might assign a different COM port number. The COM port setting depends
on the device number chosen by the driver and the operating system.
Typically, it will be higher than COM2.
Is XmLink open?
XmLink must be running in order for satellite weather to display in FliteDeck. If it is
running, you will see the XmLink icon in your system tray (near the time display). If
XmLink is not running, double-click the XmLink icon on your desktop to start the
service.
If you open XmLink to review your XM subscription and signal strength, make sure
you do not close XmLink when you are finished. To remove the XmLink screen from
your desktop, click the Minimize button on the top right corner of the program.