AnsweredAssumed Answered

Measuring digital clock jitter

Question asked by andypeters on Nov 14, 2013
Latest reply on Nov 22, 2013 by algoss

Like • Show 0 Likes0
Comment • 2

We have an E4411B here, and we'd like to measure the jitter on typical CMOS logic-level ADC clocks.
Of course the spectrum analyzer has the 75-ohm N-type RF connector.
Seems like I need an adapter which will take a typical oscilloscope probe and mate it to the analyzer's input. Does such a thing exist?

No one else has this question

Outcomes

2 Replies

tabbott Nov 15, 2013 1:18 PM
Mark Correct
Correct Answer
Hi -

Ultimately - I believe this will belong to the Agilent Scopes Group - but I wanted to investigate the E4411B RF input connector first...

You mention that the connector on the analyzer is 75Ω N-Type. We did not ship any E4411B’s that I’m aware of with this connector type. It would either be 50Ω Type-N(f) or 50 or 75Ω BNC(f).

Can you confirm?

Thanks -
Like • Show 0 Likes0
Actions
- algoss @ tabbott on Nov 22, 2013 10:35 AM
  Mark Correct
  Correct Answer
  As 'tabbot' says, the input to the Spectrum analyzer is probably a 50 Ohm connection.
  
  In a perfect world, this would be easy. You don't say what "typical oscilloscope probe" you have, but it's probably a 1Mohm probe. Mating this to a 50 Ohm input isn't easy.
  
  This will turn into a real 'science project' if you go ahead with it. At minimum, you will need an E2697A, which converts a 1M Probe for use with an Agilent 50 Ohm scope input. Then you will need an N1022B (which needs power) which converts that 50 Ohm input into a 3.5mm connector.. You will need a power supply for the N1022B, and I don't have that part number readily available. You will, lastly, need a 3.5mm to Type N adapter.
  
  Needless to say this isn't supported or recommended.
  
  There isn't an easy solution for this.
  
  Al
  
  Disclaimer: For more reliable response, you should consider calling your local Agilent Technical Call Center. The Agilent Forums are monitored on an "as available" basis, and aren't necessarily the fastest way to get technical questions answered.
  Like • Show 0 Likes0
  Actions

Measuring digital clock jitter

Outcomes

Related Content

Recommended Content