You can change the serial cable baud rate at which you connect the Allegro Field PC to Microsoft ActiveSync by following these steps:

Change back to COM1 if you would like and try connecting at 115K baud. If you need help connecting, follow the instructions in the Allegro Field PC User Guide. Close the Control Panel window and then try the connection again.Confirm the change at the bottom of the PC Connection window, and then tap OK.Tap on the 'Connect to desktop using:' drop-down box, select 'COM2 115K baud' or a lower baud rate, and then tap OK.Tap on Settings > Control Panel > Communications and/or PC Connection icon/tab.The other option is to press the Blue and Start keys simultaneously on the keyboard. On the Allegro, tap on the Start button.It has been noted that switching to and connecting at 115K baud to the COM2 port on the Allegro, and then switching back to COM1 at 115K baud seems to help with future connections through COM1 at 115K baud to ActiveSync 4.5. If you have an older model Allegro Field PC or prefer not to use a USB/Power Dock, some other alternatives to serial cable are mentioned on our website at: If you are using an Allegro CX Field PC or an Allegro CE Field PC, we recommend purchasing a USB/ Power Dock. Possible solutions and work-arounds are mentioned below.

If you are using Microsoft ActiveSync version 4.5 on a Microsoft Windows XP operating system, you may have difficulty connecting through a serial cable at 115K baud to an Allegro Field PC. Serial connection issue with ActiveSync 4.5 and Windows XP

Microsoft activesync 4.5 windows 8