[Test-Equipment] Microdyne Spectrum Display Unit

[S. Schappert]

Greetings and g'day to the list,

I am seeking any data (performance specs) on Microdyne model 1261-S Spectrum Display Units.  I am interested to acquire any related documents, if available from someone out there.  One significant question regarding this model is input BW.  I believe it to be 21.4 MHz, but if someone could confirm this, I would be very greateful.

Best regards to all !

-Scott