Measuring Line Level Output? - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

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 11th July 2012, 08:52 PM   #1
Autotat is offline Autotat  United Kingdom
diyAudio Member
 
Join Date: Jul 2012
Location: Southern Blighty
Default Measuring Line Level Output?

Hello,

How do you measure the line level output of a source or pre-amp?

I have a Yamaha DSP E800 add-on AV Processor that feeds line level inputs to my stereo amp for the front LH & RH channels, but I have to turn the volume control up alarmingly high compared to settings for all other line level inputs. I want to compare the outputs to see what the difference is.

Many thanks.
  Reply With Quote
Old 11th July 2012, 09:02 PM   #2
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
Meter or oscilloscope. Most DMMs have an AC voltage range, although it might be calibrated for 50/60Hz it should be reasonably accurate for most audio frequencies.
  Reply With Quote
Old 11th July 2012, 09:23 PM   #3
Autotat is offline Autotat  United Kingdom
diyAudio Member
 
Join Date: Jul 2012
Location: Southern Blighty
Ok, thanks. I'm going to really show myself up now. Do I contact the centre with the +ve probe and the outer shield with the -ve?
  Reply With Quote
Old 11th July 2012, 09:33 PM   #4
gck303 is offline gck303  United Kingdom
diyAudio Member
 
Join Date: Jun 2012
Yes, that is correct. Be careful not to short cause a short when measuring though.
  Reply With Quote
Old 11th July 2012, 09:37 PM   #5
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
Yes, although as AC it should not matter if you get it the wrong way round. One problem you may have is that music signals keep changing level so a DMM reading will jump around.
  Reply With Quote
Old 15th July 2012, 07:35 PM   #6
cbdb is offline cbdb  Canada
diyAudio Member
 
Join Date: Oct 2008
Location: Vancouver
If you can find a sine wave source of about a .1 volts to drive the pre, that would be ideal.
  Reply With Quote
Old 15th July 2012, 07:40 PM   #7
cbdb is offline cbdb  Canada
diyAudio Member
 
Join Date: Oct 2008
Location: Vancouver
Normally there is little sound coming out of those channels for a movie mix so you need the same source for each channel for testing. The other thing is there may be internal adjustments in the DSP e800 to change the level of those channels.
  Reply With Quote
Old 15th July 2012, 07:53 PM   #8
Autotat is offline Autotat  United Kingdom
diyAudio Member
 
Join Date: Jul 2012
Location: Southern Blighty
Thanks for the help, but the problem that generated this request appears to have resolved itself. I shall keep it in mind for future reference though.

Cheers.
  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
Line level output vs inputs TLoose Car Audio 1 25th September 2011 09:36 PM
Is there any good links for measuring content at line level? doug20 Software Tools 4 21st May 2010 05:00 PM
iPod's line level output? Dxvideo Chip Amps 9 26th May 2007 02:41 PM
Headphones output to line level Simpleton Parts 1 13th May 2007 09:54 PM
Preamp with line level output linuxenthusiast Analog Line Level 5 30th July 2006 11:42 AM


New To Site? Need Help?

All times are GMT. The time now is 03:26 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