| Products > Test Equipment |
| Using (and living with) Siglent SDS1000X-E Series Oscilloscopes |
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| tautech:
--- Quote from: skempf on July 15, 2021, 03:49:40 pm ---I don't have a 50Ω terminator, so I'm just using a probe. The FG (1032x) is set to 1MHz square wave, 50% duty, 1Vpp. Is this what one would expect to read on the scope? --- End quote --- Precisely what you expect without 50 Ohm termination. Risetime meets and betters the 7ns spec and the overshoot is the result mismatched termination on the SDG which BTW always has a 50 Ohm source impedance. |
| bdunham7:
--- Quote from: tautech on July 15, 2021, 08:32:01 pm ---Precisely what you expect without 50 Ohm termination. Risetime meets and betters the 7ns spec and the overshoot is the result mismatched termination on the SDG which BTW always has a 50 Ohm source impedance. --- End quote --- Where is the mismatch??? |
| tautech:
--- Quote from: bdunham7 on July 16, 2021, 01:44:10 am --- --- Quote from: tautech on July 15, 2021, 08:32:01 pm ---Precisely what you expect without 50 Ohm termination. Risetime meets and betters the 7ns spec and the overshoot is the result mismatched termination on the SDG which BTW always has a 50 Ohm source impedance. --- End quote --- Where is the mismatch??? --- End quote --- 50 Ohm source to 10x probe. |
| bdunham7:
--- Quote from: tautech on July 16, 2021, 01:56:36 am --- --- Quote from: bdunham7 on July 16, 2021, 01:44:10 am --- --- Quote from: tautech on July 15, 2021, 08:32:01 pm ---Precisely what you expect without 50 Ohm termination. Risetime meets and betters the 7ns spec and the overshoot is the result mismatched termination on the SDG which BTW always has a 50 Ohm source impedance. --- End quote --- Where is the mismatch??? --- End quote --- 50 Ohm source to 10x probe. --- End quote --- The source is it's own termination, there's no need to add another when there's no transmission line. I don't know the exact distance between the 50R pad in the SDG and the end of the BNC connector, but λ/4 would be in the GHz range for the likely distances of a few cm. You can add a 50R pass-thru to make it a 25R output if you like, but there's still a distance between that 50R and the terminators BNC connector.... |
| tautech:
Knock yourself out looking at properly terminated sources for square waves here: https://www.eevblog.com/forum/testgear/show-us-your-square-wave/ |
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