| Products > Test Equipment |
| DC-Load wanted(Siglent SDL1020X-E found) |
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| orzel:
--- Quote from: Martin72 on January 03, 2024, 12:17:18 am ---Hi Bram, In progress... ;) --- End quote --- What a teasing ! |
| nctnico:
I'd put the opamp much closer to the transistors and make sure high impedance nets (especially the feedback loop) have the smallest possible loop area. |
| Martin72:
Good hint, I´ll place a part of the circuitry on the bottom side. |
| nctnico:
--- Quote from: Martin72 on January 02, 2024, 12:19:33 pm ---Ah, ahh...I didn't see that... :palm: Well, the only solution would be to actually and directly compare an X model with an X-E via teardown. Or, I would take and save various measurements, then "optimize" and repeat the measurements. What I find suspicious is this jump in price. However, if you can convert a Siglent 2.1Ghz SA to a 3.2Ghz SA/VNA, why should it be any different in the case of loads? The only way to find out is to test more thoroughly. --- End quote --- You can't really test it. You need to identify the components that determine the accuracy. But even if the sample of the lesser model you have has the higher spec components, you can't be sure a lesser model always has the better components in them. Old story from S.E.D.: One of the members over there produced a circuit that needed 1% capacitors. But since these where expensive, they bought the 5% ones and binned them. The excess capacitors where used elsewhere, so nothing got wasted. However, one day they received a batch where all the capacitors within 1% tolerance where missing. In the end you can't be sure unless you specifically buy a part of piece of equipment that is specified to certain accuracy / tolerance levels. |
| Martin72:
Hi, --- Quote ---But even if the sample of the lesser model you have has the higher spec components, you can't be sure a lesser model always has the better components in them. --- End quote --- In this case, I wouldn't care if another batch was equipped differently. I have the "good" one. ;) But I know what you mean and how you mean it. The load is already on its way, I can test it at the weekend. |
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