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| Rigol DP832 remote command update rate????.............. |
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| Smokey:
True. Important to point out. We need to remember it's still a bench supply after all. I don't think that would be much of an issue for my original application of a FET classifier. |
| alm:
There are systems power supplies with an active down-programmer that can slew much faster, because in a systems application that might translate to increased throughout. But for a curve tracer you're not likely to need to slew very fast, indeed, as long as you're not doing pulsed measurements. How about the readback sample rate? Is it also faster? |
| RoGeorge:
A power supply can only source current, it can not sink current. It has electrolytic capacitors at output, and thus the slower discharging time when the output is left without a load. Otherwise I found it fast enough for a power supply. When remote controlled, the '*OPC?' command is supposed to tell when a command is completed (in this case when the voltage settled to the requested value), though I never tested that in my DP832. For fast settling there are 4 quadrant power supplies that can both source or sink current, often called SMU, but that's a different type of instrument. |
| alm:
A limited sinking capability is common in more high end power supplies. The old HPAK 6632A/B for example. As I said before, they do this because it's important in automation. This only provides two quadrants: no negative voltages without changing connections. GW-Instek also has a power supply that can sink current. I would expect it to also have a faster down programming speed. But clearly not in these supplies. |
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