Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Software Tools SPICE, PCB CAD, speaker design and measurement software, calculators

Howto - Distortion Measurements with REW
Howto - Distortion Measurements with REW
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 25th March 2020, 09:53 PM   #321
Mark Tillotson is offline Mark Tillotson
diyAudio Member
 
Join Date: May 2018
Location: Cambridge UK
Quote:
Originally Posted by tcpip View Post
The general impression I've been getting from discussions here is to take 0.015 - 0.007 = 0.008% as the distortion?

I believe some members are doing this per HD, not at the THD level, and then adding them up to get the derived THD.

I'm new to this; I too am learning.

Doesn't work like that - distortions may be cancelling each other out or reinforcing each other or anything in-between, so that the actual distortion might be as bad as 0.015+0.007 = 0.021% (the amp's 0.021% distortion cancelled the loopback distortion and then some).


Its best to quote the amp figure and the loopback figure so that the uncertainty in the measurement is explicit.
  Reply With Quote

Reply


Howto - Distortion Measurements with REWHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Distortion and Other Measurements ????? SyncTronX Equipment & Tools 8 29th April 2014 06:57 AM
Distortion measurements, THD, IMD-what card? Eugene Dvoskin Solid State 24 1st January 2011 06:11 PM
Distortion Measurements Nikon1975 Tubes / Valves 8 1st March 2010 12:57 PM
How to do IM distortion measurements? Conrad Hoffman Parts 1 28th May 2007 06:09 PM
Distortion measurements Vg Multi-Way 5 13th August 2004 11:32 AM


New To Site? Need Help?

All times are GMT. The time now is 04:52 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki