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| Why are Deskew Fixtures expensive? |
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| pdenisowski:
--- Quote from: tautech on September 06, 2023, 12:38:02 am ---Define HF. ;) --- End quote --- Touché :) --- Quote from: tautech on September 06, 2023, 12:38:02 am ---What frequency does your R&S deskew fixture offer ? --- End quote --- We spec it as rise/fall times and amplitudes: see attached https://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_common_library/dl_brochures_and_datasheets/pdf_1/RT-ZFxx_dat-sw_en_3606-7653-22_v1000.pdf |
| tautech:
Thanks for that. Seems R&S also have a small loop too large for the 100 MHz Tek P6022 current probe, just like with Siglent DF2001A Deskew Fixture. ::) Had to modify mine by removing the PCB loop and fit a wire link to meet the P6022 0.140" max cable dia spec. |
| Martin72:
--- Quote ---Had to modify mine by removing the PCB loop and fit a wire link to meet the P6022 0.140" max cable dia spec. --- End quote --- And I had copied this "Tautech mod", plus an acrylic bottom plate.. 8) |
| tautech:
--- Quote from: Martin72 on September 06, 2023, 08:41:17 pm --- --- Quote ---Had to modify mine by removing the PCB loop and fit a wire link to meet the P6022 0.140" max cable dia spec. --- End quote --- And I had copied this "Tautech mod", plus an acrylic bottom plate.. 8) --- End quote --- Tell me Martin, is the large loop running the same ~22kHz frequency as the small loop ? I've never checked....as I don't have a large/monster current probe. :( Oh hang on, I measured both the risetimes here: https://www.eevblog.com/forum/testgear/scope-probe-deskew-fixture-pcb-project/msg3169004/#msg3169004 |
| kerouanton:
--- Quote from: pdenisowski on September 05, 2023, 11:44:35 pm ---Define "expensive" :) Relative to the cost of the scope or relative to the cost of a current probe? --- End quote --- Thanks for the explanation about your RT-ZF20 fixture, and for the video you made. The RT-ZF20 looks nice but yes for me (hobby usage) it's not in my budget. What I meant by "expensive" was about the price of raw components, no FPGA or MCU, just a NE555 and a MOSFET. --- Quote from: pdenisowski on September 05, 2023, 11:44:35 pm ---And as some of you may have guessed, I also made a video about it a few months ago :) --- End quote --- Yes, I like your videos in general, I always learn something. :-+ :-+ BTW, I went to an automation fair in Bern yesterday and was able to see some MXO4 and other nice SA at the Rohde&Schwarz booth. I may be interested in the RTB2K-COM4 as I found a nice discount (well still quite expensive compared to Siglent for my small budget, but I'm quite tempted). |
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