Author Topic: Differential Probe Output Cable Impedance - Does it matter?  (Read 1110 times)

0 Members and 1 Guest are viewing this topic.

Offline nidlaXTopic starter

  • Frequent Contributor
  • **
  • Posts: 663
  • Country: us
Out of curiosity, does it matter what type of BNC cable is used for the output cable of a (<200 MHz) differential probe? Most manufacturers don't even specify whether they use 50 Ohm or 75 Ohm cable, but I'm guessing 50 Ohm is the standard.
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 28137
  • Country: nz
  • Taupaki Technologies Ltd. Siglent Distributor NZ.
    • Taupaki Technologies Ltd.
Re: Differential Probe Output Cable Impedance - Does it matter?
« Reply #1 on: June 27, 2017, 08:01:41 am »
Probably won't matter for LF stuff but they will be 50 \$\Omega\$ that matches channel input impedance when 50 \$\Omega\$ input is selected.
Avid Rabid Hobbyist
Siglent Youtube channel: https://www.youtube.com/@SiglentVideo/videos
 

Offline capt bullshot

  • Super Contributor
  • ***
  • Posts: 3033
  • Country: de
    • Mostly useless stuff, but nice to have: wunderkis.de
Re: Differential Probe Output Cable Impedance - Does it matter?
« Reply #2 on: June 27, 2017, 08:09:56 am »
I wouldn't consider 200MHz LF stuff ...
And I'd expect the cable to have 50 Ohms.
Safety devices hinder evolution
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 28137
  • Country: nz
  • Taupaki Technologies Ltd. Siglent Distributor NZ.
    • Taupaki Technologies Ltd.
Re: Differential Probe Output Cable Impedance - Does it matter?
« Reply #3 on: June 27, 2017, 08:15:13 am »
I wouldn't consider 200MHz LF stuff ...
Neither do I. Maybe I should've stated a few 10's of KHz.

Quote
And I'd expect the cable to have 50 Ohms.
:-+
Avid Rabid Hobbyist
Siglent Youtube channel: https://www.youtube.com/@SiglentVideo/videos
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf