The latest software for the Boonton 4500B is now available. 

1.   Extract the files in the archive to the root of a USB Flash Memory Device.
2.   Turn on instrument.
3.   Connect USB drive to front USB connector on instrument.
4.   Allow Windows time to install drivers if this is the first time this USB drive is connected.
5.   Turn off instrument, leaving the USB drive connected.
6.   Turn on instrument.
7.   Software update will start automatically - a progress dialog should be displayed.
8.   4500B application will start and measurements will begin after updating is completed.

In case of difficulty, see the file Upd4500B.txt, contained in the ZIP archive. For more information, contact Boonton now.