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DS1054Z voltage differences between channel

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alsetalokin4017:

--- Quote from: Performa01 on March 30, 2016, 01:08:19 pm ---3.xx V what? Vpp, Vrms ... ? (I do not have a Rigol DS1000Z, so I cannot know what the calibration signal amplitude is supposed to be)
What vertical gain setting?
Could you provide a screenshot maybe?

--- End quote ---

"All Vmax" was specified in the original post.

The calibration signal is _nominally_ 3V max @ 1kHz. Even if its true value varies a little from that, all four channels should obviously report the same reading from the same signal, don't you think?  I think the OP's CH4 reading of 3.20 Vmax is out-of-spec, not so much because it is different from "3V" but because it is so different from the other channel readings.

Fungus:

--- Quote from: alsetalokin4017 on March 31, 2016, 06:31:02 am ---I think the OP's CH4 reading of 3.20 Vmax is out-of-spec, not so much because it is different from "3V" but because it is so different from the other channel readings.

--- End quote ---

...sssuming his CH4 doesn't need different probe calibration than the others.

(these things should really be done with a sine wave input)

I might need to have a play with my probe calibration and see how it can alter readings on a square wave.

Fungus:

--- Quote from: alsetalokin4017 on March 31, 2016, 06:22:45 am ---"What do you expect, it's only 400 dollars."    >:D

--- End quote ---

Is your point that "expensive stuff can be better"?  :-//

In that case all you're being is a snob.

If we go down that road then we have to include:

"What do you expect, it's only a $50 multimeter"

"What do you expect, it's only a $10k car"

"What do you expect, it's only a $50k house"

"What do you expect, it's only a $xxx whatever"

Nobody should ever buy anything less than the very best, right?

pxl:

--- Quote from: Fungus on March 31, 2016, 07:28:48 am ---
--- Quote from: alsetalokin4017 on March 31, 2016, 06:22:45 am ---"What do you expect, it's only 400 dollars."    >:D

--- End quote ---

Is your point that "expensive stuff can be better"?  :-//

In that case all you're being is a snob.

If we go down that road then we have to include:

"What do you expect, it's only a $50 multimeter"

"What do you expect, it's only a $10k car"

"What do you expect, it's only a $50k house"

"What do you expect, it's only a $xxx whatever"

Nobody should ever buy anything less than the very best, right?

--- End quote ---

The price should come in to the picture just about the specs (specs values and details). Once it is specified, every unit should be inside the limits.

alsetalokin4017:

--- Quote from: Fungus on March 31, 2016, 07:28:48 am ---
--- Quote from: alsetalokin4017 on March 31, 2016, 06:22:45 am ---"What do you expect, it's only 400 dollars."    >:D

--- End quote ---

Is your point that "expensive stuff can be better"?  :-//

In that case all you're being is a snob.

If we go down that road then we have to include:

"What do you expect, it's only a $50 multimeter"

"What do you expect, it's only a $10k car"

"What do you expect, it's only a $50k house"

"What do you expect, it's only a $xxx whatever"

Nobody should ever buy anything less than the very best, right?

--- End quote ---

You really don't get it? My "point" is that the "what do you expect it's only 400 dollars" seems to be the standard "excuse" whenever someone finds something wrong with a Rigol DS1054Z... and I think I recall seeing "Fungus" make that remark or similar remarks several times when I've reported a bug. Or say something like "Well, I don't use the Vmax measurement so I never see this problem, therefore it isn't a problem anyone should worry about."
 
What do _I_ expect? I expect a product to perform according to its advertisements and specifications, regardless of the price the manufacturer chooses to sell it for. If I choose to pay a certain price for a product, I still expect it to perform according to its specifications, to have all its advertised features work properly, etc. Is this unreasonable? Some people seem to think so; I'm not one of them.

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