You can obtain up to date product information, from Keysight Technologies, about your Keysight E824xA, E825xA, and E82x7C PSG signal generators over the Internet at: http://www.keysight.com/find/psg
Sales and Service Offices can be accessed on the Internet at: http://www.keysight.com/find/assist.
If you do not have access to the Internet, please contact your field engineer.