| Products > Test Equipment |
| Probe into probes. What's up? |
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| bdunham7:
--- Quote from: BillyO on January 31, 2023, 08:01:54 pm ---Yes. Why? --- End quote --- The first screenshot in your second post is labelled "Tek 6139 Bodnar" but the scope is set to DC50 input.... |
| tautech:
--- Quote from: BillyO on January 31, 2023, 08:21:06 pm --- --- Quote from: tautech on January 31, 2023, 08:11:09 pm --- --- Quote from: BillyO on January 31, 2023, 08:07:04 pm ---No ground wire used. Connected through probe adapter. --- End quote --- Something's not right. Some waveforms 0V is not on the 0V channel level like they're in AC input mode. --- End quote --- The Bodnar outputs an AC signal. --- End quote --- Okay yeah, missed one waveform was 10 MHz and the other 20 MHz. Pop the lid of the compensation box and have a squiz at what's in there. You might need to download the old book on Tek probes to follow the schematic of how these were constructed. https://w140.com/tekwiki/images/6/62/062-1146-00.pdf |
| BillyO:
--- Quote from: bdunham7 on January 31, 2023, 07:38:36 pm ---Group delay...have a close look at the Tek 6139A datasheet. --- End quote --- I can't seem to find this. It no longer seems to be on the Tek site and nothing else I have found makes mentions the group velocity characteristics. I guess you are suggesting that the different frequency components of teh sharp square waves will have different velocities in the probe system? |
| BillyO:
--- Quote from: bdunham7 on January 31, 2023, 08:29:54 pm ---The first screenshot in your second post is labelled "Tek 6139 Bodnar" but the scope is set to DC50 input.... --- End quote --- Not that I can see. It says DC1M. |
| bdunham7:
--- Quote from: BillyO on January 31, 2023, 08:35:42 pm ---I can't seem to find this. It no longer seems to be on the Tek site and nothing else I have found makes mentions the group velocity characteristics. I guess you are suggesting that the different frequency components of teh sharp square waves will have different velocities in the probe system? --- End quote --- Yes, exactly. https://w140.com/tekwiki/images/a/af/063-0870-05.pdf |
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