A5 Daughter Assembly - HP E4418A Service Manual

Theory of Operation

A5 Daughter Assembly

A5 Daughter Assembly
The daughter assembly is loaded vertically into the A2 processor
assembly. It contains two slotted post connectors. Depending on whether
you have an HP EPM-441A or an HP EPM-442A power meter, either one
or two of these connectors are used respectively for the A6 measurement
assembly(s).
HP EPM-441A/442A Service Guide 4-9