hi,
Recently acquired Anritsu MS710a powers on fine, but no legitimate I/P signal is displayed.
All other functions appear to work, including the internal calibrator signal when tested with a friends SA; including test RF signals(on friends unit).
Wondering if the I/P diodes or amp has been blown ?
Any hints about possible repairs, & schematics ?
Kind of hard to know where to start (disassembly, and PCB identification !) without literature, but the RF/IF stages should look familiar...
thank you