THD sweep versus output power using Audio Precision SYS-2700 - Page 2 - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools

Equipment & Tools From test equipment to hand tools

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 4th March 2014, 01:26 AM   #11
tomchr is offline tomchr  United States
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Greater Seattle Area
In the Sweep Panel, make Data 1 the output from the THD analyzer. Set Data 2 to be the analyzer level and select Watt for the unit. Maximize the Sweep Panel and in the section that appears, select X-Y Data 2 on X.

Wow. Not intuitive. But it does the job.

The reference resistor used for figuring the power is that set in the Analyzer Panel.

~Tom
__________________
Modulus-86: Composite amp achieving 0.00018 % THD. Damn Good 300B, Novar Spud, 21st Century Maida Reg., Filament Reg., etc.
Neurochrome : : Audio - http://www.neurochrome.com/audio - Engineering : : Done : : Right
  Reply With Quote
Old 4th March 2014, 03:13 AM   #12
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
When in doubt, read the manual.
  Reply With Quote
Old 4th March 2014, 08:34 AM   #13
tomchr is offline tomchr  United States
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Greater Seattle Area
I dunno... There's something highly unnatural about reading manuals. I was a bit concerned that my man card would get revoked as well...

~Tom
__________________
Modulus-86: Composite amp achieving 0.00018 % THD. Damn Good 300B, Novar Spud, 21st Century Maida Reg., Filament Reg., etc.
Neurochrome : : Audio - http://www.neurochrome.com/audio - Engineering : : Done : : Right
  Reply With Quote
Old 4th March 2014, 08:37 AM   #14
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Yes that's why there is the 'W' selection in the data1 & data2 set up boxes.
__________________
If you don't change your beliefs, your life will be like this forever. Is that good news? - W. S. Maugham
Check out Linear Audio!
  Reply With Quote
Old 4th March 2014, 03:06 PM   #15
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Men don't come with instructions. It's on page 412. I had to change this to protect the innocent:
Attached Images
File Type: png Saturday_THDvsPWR.png (8.3 KB, 45 views)
  Reply With Quote
Old 4th March 2014, 05:23 PM   #16
tomchr is offline tomchr  United States
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Greater Seattle Area
Quote:
Originally Posted by jackinnj View Post
It's on page 412.
I know. See Post #10.

I recommend using the "Precision-Auto" settling in the analyzer panel as well. It lowers the noise floor. I should probably read the analyzer part of the manual as well. I'm designing a li'l amp that I expect to push the capabilities of the AP instrument in terms of THD.

~Tom
__________________
Modulus-86: Composite amp achieving 0.00018 % THD. Damn Good 300B, Novar Spud, 21st Century Maida Reg., Filament Reg., etc.
Neurochrome : : Audio - http://www.neurochrome.com/audio - Engineering : : Done : : Right
  Reply With Quote
Old 14th March 2014, 02:40 AM   #17
RNMarsh is offline RNMarsh  United States
diyAudio Member
 
RNMarsh's Avatar
 
Join Date: May 2012
Location: 2457 Cascade Trail; Cool, CA. 95614
Quote:
Originally Posted by tomchr View Post
I know. See Post #10.

I recommend using the "Precision-Auto" settling in the analyzer panel as well. It lowers the noise floor. I should probably read the analyzer part of the manual as well. I'm designing a li'l amp that I expect to push the capabilities of the AP instrument in terms of THD.

~Tom
How is that amp coming along.... progress?

THx-RNMarsh
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
THD vs output power in LTspice Tekko Solid State 7 4th January 2012 02:40 PM
Apex Precision Power SA01 - useful also for Audio? tiefbassuebertr Class D 1 29th April 2010 03:02 PM
EGO Sys Gigaport HD- 8 channel USB Audio Interface? Gutbucket PC Based 1 28th August 2009 02:09 AM
Power transformers versus amplifier output power..what is your option? destroyer X Solid State 38 9th May 2009 06:23 PM
Transformer VA versus output power VA nigelwright7557 Solid State 8 18th May 2008 03:57 PM


New To Site? Need Help?

All times are GMT. The time now is 09:59 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2