Products > Test Equipment
Conversion of 500MHz TDS744A to 1GHz TDS784A
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nctnico:
IMHO the TDS600 series was specifically made for measurements at the highest samplerate to take single shots of high frequency signals and nothing else. The early ones are totally useless as general purpose scopes due to the lack of peak-detect but even with peak detect their memories are short. The TDS500 and TDS700 series are the models suitable for general purpose use.
David Hess:

--- Quote from: nctnico on September 22, 2016, 01:27:25 pm ---IMHO the TDS600 series was specifically made for measurements at the highest samplerate to take single shots of high frequency signals and nothing else. The early ones are totally useless as general purpose scopes due to the lack of peak-detect but even with peak detect their memories are short. The TDS500 and TDS700 series are the models suitable for general purpose use.
--- End quote ---

This is exactly the case.

The TDS600 series was a continuation of Tektronix's CCD based DSOs optimized for higher samples rates than were available using more conventional designs.  They are more like transient digitizers with oscilloscope ease of use than general purpose oscilloscopes.  If you wanted maximum sample rate on every channel, then this is what you used.  At the time they were produced, they had 10 times (total) or 40 times (per channel) the real time sample rate of the fastest TDS700 series.

Since they used CCDs, features like segmented memory (FastFrame) and DPO operation (InstaView) could not be included.  The early TDS600 models even lacked peak detection which is only surprising because their 2440 ancestors had it; I assume this was a difficult implementation detail that Tektronix had to figure out for inclusion in the TDS600B and later models.

I wonder if they sold a lot of these to nuclear weapon testers like the ancient 519 1 GHz analog oscilloscope.
timb:
Speaking of FastFrame... What sort of use case is it for? There's no example in the manual and I never could really think of a situation where it would be useful. (Obviously it is useful, or it wouldn't be a feature!)
rx8pilot:

--- Quote from: timb on September 22, 2016, 06:48:43 pm ---(Obviously it is useful, or it wouldn't be a feature!)

--- End quote ---

I don't know.... a lot of features are designed by the marketing dept and totally useless.
timb:

--- Quote from: rx8pilot on September 22, 2016, 07:49:09 pm ---
--- Quote from: timb on September 22, 2016, 06:48:43 pm ---(Obviously it is useful, or it wouldn't be a feature!)

--- End quote ---

I don't know.... a lot of features are designed by the marketing dept and totally useless.

--- End quote ---

I suppose that's true for a lot of things, though I cant think of many superfluous features on test gear.

Doesn't your new Keysight scope have a voice control feature? I would think something like that was conceived by the Marketing Department. ("Hmmm, Siri is really helping the iPhone sell... We should do that, but on an Oscilloscope!")

That said, if implemented well I can see how it would actually be very useful.

I'm still on the fence about touchscreen based instruments though. It's been tried in many forms over the years, and no one has quite gotten right. (Maybe some of the newer, more expensive scopes that have nice, big capacitive touch screens might work well, I haven't tried them; IR and resistive touch screens of the past just don't cut it.)
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