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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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