My 2440 seems to fall short of specs.? I measure about 290 MHz bandwidth, down 3 dB.
Bob
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On Monday, March 21, 2022, 09:14:49 AM PDT, David Templeton <vexorg.calibra@...> wrote:
Yeah, I tend to forget how old they are. I¡¯m just so used to GHz scopes in single shot that I only see the analog bandwidth and assume it¡¯s single shot.
David
On 21 Mar 2022, at 16:06, Roger Evans via groups.io <very_fuzzy_logic@...> wrote:
?It was very common in the early years of DSOs for the analog signal to be severely under-sampled.? I have a late model 2211 which is hybrid analog/digital, has 100MHz analog bandwidth and only 20Msamples/s digitising bandwidth.? With my rule of thumb (at least two samples during the pulse rise time) that is no better than 7MHz single shot digital bandwidth, Tek claimed 10MHz.? When you first switch the 2211 into digital mode at a fast sweep speed it takes several seconds for the random equivalent time sampling to 'fill in the gaps'.? By the standards of the time the 2440 had a very respectable single shot digitising rate.
Roger
