Hello to all,

I'm trying to repair a Systron Donner Spectrum Analyzer, model SD764.

It is the military version ( I think ) and it's working with some
difficulty and measuring errors.

Anyone know where to find a service manual, even willing to pay for ???

I'm also trying to find the ENGLISH manual of Rohde&Schwarz *ZWA*
Wobbler . It is an ancient Vector Analyzer ( 1968 vintage ).

I do have original GERMAN manuals, but my knoledge of this language
is nil !!! :-(

Seems fully functional, but... without understandable instructions
I'm lost .

You can reply also directly, my mail is valid.

Thanks for any help furnished, cheers de I5SPO, Piero.