Re: 2221a Service Manual
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I am not quite sure of this since I do not have a 2221a manual either
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but besides the bandwidth and lack of delayed sweep, I suspect the 2221 is based on the 2230 design which uses a channel switch to do analog multiplexing in CHOP and ALT modes before the 20 MS/sec ADC while the 2221a is based on the 2232 design which uses two separate 100 MS/sec ADCs followed by digital multiplexing in CHOP and ALT modes. While I really get a lot of use out of my 2230, the analog multiplexing makes DSO CHOP mode a little weird. On Tue, 25 Sep 2012 02:33:32 -0000, "KQ8M" <kq8m@...> wrote:
Is it just me or is the service manual for a 2221a scope next to impossible to find? I have been searching google all evening and have only found the 2221 service manuals for the 60 MHz scope and not the 2221a 100 MHz scope. |
David Hess