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| TDS3054, TDS5054 & MSO4104, Pulse Voltage Reading Comparison |
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| jonpaul:
suggest you repeat this process with fast rise cal gen. Leo Bodnar 40 ps and TEK PG506 or equiv. Use no probe, just 50 ohm précision coax direct gen>>>scope 50 ohm That eliminates the unknown probes and unknow generators from the test. Jon |
| daveyk:
Thank you. It is the same probe and "Pulser" used with each scope. The problem with the MSO4104 is the baseline compensation calibration routine does not work as well in the higher amplifier voltage ranges . Whether that is normal with the MSO, or an issue with his particular one, I do not know. PP reading is within .5% of the TDS3054 and TSD5054 MIN reading. This baseline offset may be why the MSO4104 always shows 0% overshoot, the way it is with the very clean pulser I am using now. I also am not sure if the method I was taught, by the MFG, to measure that overshoot with the TDS3000 series is correct or not. The procedure is to change the sweep to 1ms and acquire to envelope. This pulse, btw, has a PRF of about 750Hz. You do that with the TDS3054, or TDS5054 and you can read 3%, but it also doesn't seem accurate; almost taking a reading while anti-aliasing. You do that to the MSO4104, it still shows a perfect 0% overshoot (with it what you see on-screen). So, I am thinking, of the three scopes, the MSO4104 is the only one correctly reading the over-shoot - lol. |
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