Computer Audio Asylum

Measuring accuracy - Jpp would be lower

196.11.134.77

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Computer Audio Asylum ]

That's how DSOs work. Unfortunately, my Elab-80 won't do (only 8 bit resolution). Yes those high tech versions will yield more accurate results (which would show a lower jitter measure). There's no need to compare to input file - you need to analyze the analogue output (which goes through an ADC).

If the ADC introduced substantial jitter when recording the analogue outputs, this jitter would be clearly visible in the spectrum analysis. In fact what is shown is inclusive of the ADC's jitter distortion (which gets added to analogue waveform from DAC's output). This means the result shown is a high water mark - a DSO without jitter would show even less jitter in the recorded output!

Even with an ADC step that's not jitter free, Jpp of 72ps and 76ps (with DAC as master) remain valid measures. Making assumptions over the jitter introduced by the ADC and thus reducing the Jpp figure is not my preference. Its like attributing all the good things to the DAC & Transport and parking the 'not so good' with the Recorder.

Follow Ups:

Post a Followup:

FAQ

Post a Message!

 Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Computer Audio Asylum ]
[ Comment ] [ Edit ] [ Delete ] [ Copyright Warning! Click for Details ]
[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2008, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]