Also came across a reference to a CD-ROM with documentation. Anyone know about this and if it might be useful?
Agilent Technologies ESA Spectrum Analyzers Documentation
CD-ROM Part Number: E4401-90427?????????
?Date: August 2002
Info came from this PDF document which contains links but the corresponding files seem to have been removed from the site.
http://doc.xdevs.com/doc/HP_Agilent_Keysight/HP%20ESA%20E4400%20Series%20Documentation/ESA%20%28D%29/MAINMENU.PDF
