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CIRCLE WITH A DOT

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  3. Wrote up the blog-format version of the TCXO failure analysis including a bit more backstory and commentary all in one place

Wrote up the blog-format version of the TCXO failure analysis including a bit more backstory and commentary all in one place

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  • azonenberg@ioc.exchangeA This user is from outside of this forum
    azonenberg@ioc.exchangeA This user is from outside of this forum
    azonenberg@ioc.exchange
    wrote last edited by
    #1

    Wrote up the blog-format version of the TCXO failure analysis including a bit more backstory and commentary all in one place

    https://serd.es/2026/03/06/TCXO-failure-analysis.html

    haskal@types.plH missingclara@chaos.socialM vxo@digipres.clubV lee_holmes@infosec.exchangeL attie@hachyderm.ioA 5 Replies Last reply
    0
    • azonenberg@ioc.exchangeA azonenberg@ioc.exchange

      Wrote up the blog-format version of the TCXO failure analysis including a bit more backstory and commentary all in one place

      https://serd.es/2026/03/06/TCXO-failure-analysis.html

      haskal@types.plH This user is from outside of this forum
      haskal@types.plH This user is from outside of this forum
      haskal@types.pl
      wrote last edited by
      #2

      @azonenberg https://serd.es/2026/03/06/TCXO-failure-analysis.html#:~:text=deprocess%20the%20device%20or%20do%20extensive%20reverse%20engineerign found a minor typo,,,

      azonenberg@ioc.exchangeA 1 Reply Last reply
      0
      • haskal@types.plH haskal@types.pl

        @azonenberg https://serd.es/2026/03/06/TCXO-failure-analysis.html#:~:text=deprocess%20the%20device%20or%20do%20extensive%20reverse%20engineerign found a minor typo,,,

        azonenberg@ioc.exchangeA This user is from outside of this forum
        azonenberg@ioc.exchangeA This user is from outside of this forum
        azonenberg@ioc.exchange
        wrote last edited by
        #3

        @haskal thanks fixed

        1 Reply Last reply
        0
        • azonenberg@ioc.exchangeA azonenberg@ioc.exchange

          Wrote up the blog-format version of the TCXO failure analysis including a bit more backstory and commentary all in one place

          https://serd.es/2026/03/06/TCXO-failure-analysis.html

          missingclara@chaos.socialM This user is from outside of this forum
          missingclara@chaos.socialM This user is from outside of this forum
          missingclara@chaos.social
          wrote last edited by
          #4

          @azonenberg oh, nice! you managed to get it open

          azonenberg@ioc.exchangeA 1 Reply Last reply
          0
          • missingclara@chaos.socialM missingclara@chaos.social

            @azonenberg oh, nice! you managed to get it open

            azonenberg@ioc.exchangeA This user is from outside of this forum
            azonenberg@ioc.exchangeA This user is from outside of this forum
            azonenberg@ioc.exchange
            wrote last edited by
            #5

            @MissingClara And identified the failure point, and a strong suspicion of the two contributing causes

            1 Reply Last reply
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            • azonenberg@ioc.exchangeA azonenberg@ioc.exchange

              Wrote up the blog-format version of the TCXO failure analysis including a bit more backstory and commentary all in one place

              https://serd.es/2026/03/06/TCXO-failure-analysis.html

              vxo@digipres.clubV This user is from outside of this forum
              vxo@digipres.clubV This user is from outside of this forum
              vxo@digipres.club
              wrote last edited by
              #6

              @azonenberg
              So I guess I'm going to avoid screaming at my TCXOs then

              scruss@xoxo.zoneS 1 Reply Last reply
              0
              • azonenberg@ioc.exchangeA azonenberg@ioc.exchange

                Wrote up the blog-format version of the TCXO failure analysis including a bit more backstory and commentary all in one place

                https://serd.es/2026/03/06/TCXO-failure-analysis.html

                lee_holmes@infosec.exchangeL This user is from outside of this forum
                lee_holmes@infosec.exchangeL This user is from outside of this forum
                lee_holmes@infosec.exchange
                wrote last edited by
                #7

                @azonenberg Super cool analysis! Thanks!

                1 Reply Last reply
                0
                • azonenberg@ioc.exchangeA azonenberg@ioc.exchange

                  Wrote up the blog-format version of the TCXO failure analysis including a bit more backstory and commentary all in one place

                  https://serd.es/2026/03/06/TCXO-failure-analysis.html

                  attie@hachyderm.ioA This user is from outside of this forum
                  attie@hachyderm.ioA This user is from outside of this forum
                  attie@hachyderm.io
                  wrote last edited by
                  #8

                  @azonenberg
                  > It took a bit of experimenting with external GPU enclosures and such to figure out how to get the ThunderScope to sit out on my lab bench so I wouldn’t need to crawl under the bench and run cables up from the workstation on the floor up to probes on my DUT, but I figured that out easily enough.

                  I'm looking forward to reading the rest, but I'm also very interested to hear more about this if you're able! I opted for the Thunderbolt variant precisely because I didn't want to dig for connections. Might be reconsidering my choice now... 🤔

                  azonenberg@ioc.exchangeA 1 Reply Last reply
                  0
                  • attie@hachyderm.ioA attie@hachyderm.io

                    @azonenberg
                    > It took a bit of experimenting with external GPU enclosures and such to figure out how to get the ThunderScope to sit out on my lab bench so I wouldn’t need to crawl under the bench and run cables up from the workstation on the floor up to probes on my DUT, but I figured that out easily enough.

                    I'm looking forward to reading the rest, but I'm also very interested to hear more about this if you're able! I opted for the Thunderbolt variant precisely because I didn't want to dig for connections. Might be reconsidering my choice now... 🤔

                    azonenberg@ioc.exchangeA This user is from outside of this forum
                    azonenberg@ioc.exchangeA This user is from outside of this forum
                    azonenberg@ioc.exchange
                    wrote last edited by
                    #9

                    @attie The keyword to search for is "OCuLink" which is basically just PCIe over cables.

                    On the PC side the adapter card is just a passive PCB taking the differential pairs from a PCIe card edge connector and shoving them over a SFF-xxxx (forget the number) cable.

                    On the enclosure side, typically you have a board with a SFF connector and a 12V DC power inlet that converts it back to a PCIe connector you can slide a card into.

                    azonenberg@ioc.exchangeA 1 Reply Last reply
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                    • vxo@digipres.clubV vxo@digipres.club

                      @azonenberg
                      So I guess I'm going to avoid screaming at my TCXOs then

                      scruss@xoxo.zoneS This user is from outside of this forum
                      scruss@xoxo.zoneS This user is from outside of this forum
                      scruss@xoxo.zone
                      wrote last edited by
                      #10

                      @vxo @azonenberg yeah, don't shake the singing rocks

                      1 Reply Last reply
                      0
                      • azonenberg@ioc.exchangeA azonenberg@ioc.exchange

                        @attie The keyword to search for is "OCuLink" which is basically just PCIe over cables.

                        On the PC side the adapter card is just a passive PCB taking the differential pairs from a PCIe card edge connector and shoving them over a SFF-xxxx (forget the number) cable.

                        On the enclosure side, typically you have a board with a SFF connector and a 12V DC power inlet that converts it back to a PCIe connector you can slide a card into.

                        azonenberg@ioc.exchangeA This user is from outside of this forum
                        azonenberg@ioc.exchangeA This user is from outside of this forum
                        azonenberg@ioc.exchange
                        wrote last edited by
                        #11

                        @attie note that many oculink carriers are just the card edge connector and provide no side support so i 3d printed a card guide to go around the pcb and keep the TS from wobbling side to side

                        1 Reply Last reply
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