Hello;
Sorry if this is duplicating my reply to my own request.
I have been able to source schematics for the Datron Wavetek 4920AVMS, 4922 and an interesting sheet that details what boards went into the 4950.
I have amended them into the 4920M Vol 2 manual to create a "super" Vol 2
They are posted here, along withBAMA and ko44b:
https://xdevs.com/doc/Wavetek/4920/Datron_Wavetek_4920_4920M_4950_Service_Manual_Vol-2.pdf
4920AVMS quick ref:
https://xdevs.com/doc/Wavetek/4920/Datron_Wavetek_4920_4920M_4950_Service_Manual_Vol-2.pdf
4922 Wide Band module, user and service:
https://xdevs.com/doc/Wavetek/4922/Datron_Wavetek_4922_um_sm.pdf