Actually for the 80s eastern block, 100MHz was decent, most scopes were limited around 10MHz due to the slow deflection in cheap CRTs. To overcome this limitation, CRTs had multiple electrodes for post-acceleration, which was changing the geometry, thus needed to be corrected with electrostatic lenses, and also the vertical deflection plates are not one but multiple, so that the electrons move in phase with the signal, as they travel from the gun towards the screen. Generally, not even in the west, you couldn’t find analog scopes above a few hundred MHz.
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u/LukasReinkens 17d ago
100mHz for anyone who wants to have the least possible Bandwidth ever