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Aspect ratio of oscilloscope displays

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David Hess:

--- Quote from: NiHaoMike on July 11, 2020, 01:18:07 am ---
--- Quote from: SilverSolder on July 10, 2020, 11:00:25 pm ---Are you on USB scopes as well?
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I like the idea but not the implementations that currently exist. PCIe would probably be a better idea if you want to turn a PC into a scope.
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That is how the higher end Tektronix DSOs work; the oscilloscope is just a PCIe card on a PC motherboard.

The advantage of using PCIe instead of USB is that the powerful PC CPU can be used for decimation functions instead of only display processing.

vk6zgo:

--- Quote from: Renate on July 08, 2020, 01:21:35 am ---Thanks for all the responses.
I just thought that since everyone has such strong opinions about oscopes, aspect ratio would weigh in somewhere.

You wouldn't believe it, but I once fixed a TV with a 10 MHz oscope.
And the sweep wasn't even calibrated! :-DD

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Back in the day, that's what a lot of TV service techs used, so I have no problem believing it.
Any Oscilloscope beats just a DMM or VOM any day for TV work.

I traced a fault in a car ignition system once, using a BWD CRO with a triggering problem.
"Back probing" on the EMM auto type connector & "waiting for a pulse to drift by", proved the auto mechanic was talking crap when he said "it's in the computer".

james_s:

--- Quote from: IDEngineer on July 09, 2020, 06:24:49 pm ---My two cents: I love larger displays, especially when coupled with higher resolution A/D's. But I have mixed emotions about the "wider than ten divisions" aspect ratios. While I appreciate seeing more of the time domain on the screen, it's darned useful to be able to make quick mental calculations using the timebase and knowing there are ten displayed major increments. My Rigol 4000 series displays 14(!?!) major horizontal divisions which makes quick-glance calculations nearly impossible.

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A larger screen is nice if it doesn't make the whole scope larger, obviously there's a limit there. I think the TDS3000 series is just about the perfect size, if I were designing it today I'd probably go with a display about half an inch bigger with a correspondingly more narrow bezel but no need to have it huge. A VGA or in modern times HDMI port can allow connecting as big  monitor as someone wants.

vk6zgo:

--- Quote from: IDEngineer on July 09, 2020, 06:24:49 pm ---My two cents: I love larger displays, especially when coupled with higher resolution A/D's. But I have mixed emotions about the "wider than ten divisions" aspect ratios. While I appreciate seeing more of the time domain on the screen, it's darned useful to be able to make quick mental calculations using the timebase and knowing there are ten displayed major increments. My Rigol 4000 series displays 14(!?!) major horizontal divisions which makes quick-glance calculations nearly impossible.

--- End quote ---

The current generation doesn't believe in "counting squares" & relies upon the "on screen" numerical displays as gospel.
This makes a lot of posted screenshots hard to work out for OFs who don't have that brand, or, indeed, as in my case, any brand, of DSO, because the presentation varies so much.
The graticule is usually either almost, or completely, invisible, so our normal "quick estimations" become difficult.

capt bullshot:

--- Quote from: vk6zgo on July 12, 2020, 04:37:49 am ---
--- Quote from: IDEngineer on July 09, 2020, 06:24:49 pm ---My two cents: I love larger displays, especially when coupled with higher resolution A/D's. But I have mixed emotions about the "wider than ten divisions" aspect ratios. While I appreciate seeing more of the time domain on the screen, it's darned useful to be able to make quick mental calculations using the timebase and knowing there are ten displayed major increments. My Rigol 4000 series displays 14(!?!) major horizontal divisions which makes quick-glance calculations nearly impossible.

--- End quote ---

The current generation doesn't believe in "counting squares" & relies upon the "on screen" numerical displays as gospel.
This makes a lot of posted screenshots hard to work out for OFs who don't have that brand, or, indeed, as in my case, any brand, of DSO, because the presentation varies so much.
The graticule is usually either almost, or completely, invisible, so our normal "quick estimations" become difficult.


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Yep, I'd always have to ask for the V/div and sec/div settings if a colleague shows me a scope screenshot. He's nearly always getting in trouble finding that number in the huge variety of displayed measurements and whatnot. Most often these readouts have way more digits than reasonable. Once a student that did some work for me pointed to an DC voltage reading on the scope screen to prove that voltage was within its specs ;) Told him to use the multimeter that sat unused next to the scope.

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