Installation Note
Part Number E4406-90278
Printed in USA April 2011  Supersedes February 2005
Agilent E4406A VSA Series Transmitter Tester CPU 
Retrofit Kit for Instruments with Serial Prefix 
US3948 and below and with CPU Assemblies 
E4406-60073 or E4406-60040
Kit Part Number E4406-60238