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| Siglent SDG1032 as bad as rigol DG812? |
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| Sensorcat:
--- Quote from: KungFuJosh on May 18, 2024, 11:00:52 pm ---I have a couple Rigol ADP0150BNC. Which will probably be the only Rigol gear I ever own. 🤣 --- End quote --- Usually not needed. Many people think a 50ohm termination is necessary to avoid errors due to reflections at oscilloscope inputs. But this is only true if you use regular coax cables to the scope inputs. Up to several hundred MHz, the best thing you can connect to these inputs is a good 10x probe instead. Its cable is not a regular coax, but a special lossy transmission line, which effectively solves the problem at no additional cost, since you need these anyway. If you have some sort of coax wiring on your desk, with BNC connectors, all you need is a BNC probe tip adaptor. A cheap and easy solution, which does not require external terminators (which are accesories offered quite often in low quality), and no internal termination (which restricts the choice of scopes to expensive models). Best source I know to explain the details: https://cleverscope.com/downloads/articles/THE_SECRET_WORLD_OF_PROBES_OCt09.pdf |
| KungFuJosh:
--- Quote from: Sensorcat on May 19, 2024, 01:31:11 am --- --- Quote from: KungFuJosh on May 18, 2024, 11:00:52 pm ---I have a couple Rigol ADP0150BNC. Which will probably be the only Rigol gear I ever own. 🤣 --- End quote --- Usually not needed. --- End quote --- Indeed, especially considering my SDS2504X+ has 50Ω inputs when I need it. However, they have come in handy a few times over the years. The quality of them seems fine for what they are. |
| Sensorcat:
--- Quote from: KungFuJosh on May 19, 2024, 01:37:41 am ---Indeed, especially considering my SDS2504X+ has 50Ω inputs when I need it. However, they have come in handy a few times over the years. The quality of them seems fine for what they are. --- End quote --- Another advantage of the 10x passive probe everybody has is the DC load: You can avoid reflection issues and have input resistance of 10MΩ at the same time. Good for you if you have 50Ω inputs. My intent was to write something useful for those who don't. |
| KungFuJosh:
--- Quote from: Sensorcat on May 19, 2024, 01:48:40 am ---Another advantage of the 10x passive probe everybody has is the DC load: You can avoid reflection issues and have input resistance of 10MΩ at the same time. Good for you if you have 50Ω inputs. My intent was to write something useful for those who don't. --- End quote --- Thank you. 😉 Anyway, sometimes simple coax is the correct choice, and those individuals without the 50Ω inputs will need the terminators. |
| Njk:
--- Quote from: nctnico on May 18, 2024, 04:05:26 pm ---What you see in the screenshots is typical for less than optimal power-supply sequencing at power down. --- End quote --- Definitely. Looks like the power good signal from PSU is missing or the sw pays little attention to it. It's impossible to specify everything by formal requirements. But customers typically assume that the designer is from the same planet. |
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