Re: On-topic: HP 1743A portable oscilloscope having unique feature?
I understood what you mean!
Having myself a Tek 464 with DM44 option, when I first learned what it was
capable of doing, I was amazed, most especially because it's all analog and
it didn't need to add pretty much anything to the already existing scope's
A& B sweep circuitry. Essentially, it's only an additional multi-turn DTP
pot alternatively engaged by a flip-flop, and the voltmeter being able to
measure the voltage difference between the 2 pots' wipers... So simple and
But indeed, it relies fully on both DTP's wiper voltages and, although we
can change the scope from "B SWEEP STARTS AFTER DELAY" to a NORM, or CH1 or
CH2 or any EXT post-delay B trigger event, and thus have the delta-time
alternated B Sweeps post-triggered, and see the intensified portions jump
to immediate post trigger edges, at both different times, the delta-time
reading on the voltmeter will still reflect only the position of both DTPs'
postions, irrespective of the actual time when the B-sweep was triggered.
To make the same happen on the DM44 (still in the analog realm), perhaps
one could sample-and-hold the actual A sweep's ramp voltage, by the time of
the alternated B post-trigger events, and have the volt-meter to measure
the difference of voltages between the outputs of the sample-and-holds...
But as I write this, I realize that a sample-and-hold simply just doesn't
hold the voltage forever if you don't convert it to digital! (well... maybe
long-enough with a MOSFET buffer)... Rats... I was already thinking of ways
to implement this little upgrade!.
Upon consideration, it seems that HP was really in the lead in that realm.
2017-06-29 16:16 GMT-03:00 @Raymond [TekScopes] <
I am not sure what you mean here. All of the oscilloscopes whichI think that I still haven't been able to explain what I think is unique
[Non-text portions of this message have been removed]