I am having a Lecroy differential probe and trying to measure a LVDS signal. This is the Reference Manual which I am referring to as a guide.

My differential probe tip/lead model number : DX20 - SP/SI/QC. Please see its specification in the table present on the document. I am using the WL-PBUS2 Probus2 cable assembly with the D420-A Differential amplifier.

But can someone tell me what are circled in red items on the differential probe tip/lead assembly?

enter image description here

There seems to be 2 resistors in series with the +ve and the -ve differential line and one resistor across it. I tried to measure their values in multimeter. But it think, there is a layer of coating above those components because of which I am not able to measure their values using multimeter. I did not want to scratch the coating and try fearing it might damage the probe which is very expensive.

Can someone tell me what are the 3 components in the above image? I search and tried to read in the attached manual, but unable to find what those are and how do they help in measuring a differential signal.

Below is my setup :

enter image description here

I am connecting the above differential probe across the vias 1 and 3 to measure the LVDS Signal. I am getting random waveform which I know it is because of the termination mismatch at the probe shown above.

Please guide.

  • 2
    \$\begingroup\$ They are ... blurs! \$\endgroup\$ – user_1818839 Mar 15 at 21:23
  • \$\begingroup\$ Yes, I understand that. But I am unable to take a better clarity image since they are so small. I believe all the three small components are resistors. \$\endgroup\$ – Newbie Mar 16 at 4:03
  • \$\begingroup\$ If you hold the phone just a little further away, it will actually be able to focus. \$\endgroup\$ – user_1818839 Mar 20 at 18:40

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