Re: Don't run QCX at 19V
Arv Evans <arvid.evans@...>
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Popular idea seems to be that a lower frequency scope is not useful for
measuring HF signals. This is true for unmodulated signals, but not true
if the signal is modulated and the audio scope is equipped with an RF
detector probe. If modulation is at or near 100 percent the detected
RF at AF frequency is a fairly good way to trace signal levels and to
determine if the signal is present or missing. It is not perfect, but if
the alternative is no measurement, it can be helpful.
It is also possible to build a "chopper" circuit that converts HF/RF into
lower frequency AF or MF and then measure that on a lower frequency
Of course, just a diode detector and a VOM is also very useful when
tracing RF signals. It is more an issue of operator understanding than
of instrument requirements.
On Tue, Jun 15, 2021 at 12:55 PM Yury Krasouski <krasoffski@...> wrote: