AFMG Network Forum
AFMG Network Forum Index -> AFMG SysTune -> Peak at the end of ETC chart
Post new topic  Reply to topic View previous topic :: View next topic 
Peak at the end of ETC chart
PostPosted: Sun Jan 31, 2010 4:51 pm Reply with quote
Cillol
Member
 
Joined: 31 Jan 2010
Posts: 3




Hi,
often I can see a strong peak on the right side of ETC chart. This peak occour exactly at the same time (on the X axys) of the FFT size and only if I set the delay offset with the peak or auto function. If I manually set the delay offset with a slightly lower value, the peak disappear.
Why this happen?

Thanks
View user's profile Send private message
PostPosted: Sun Jan 31, 2010 5:27 pm Reply with quote
Charlie
Member
 
Joined: 28 Apr 2005
Posts: 51
Location: Charlotte, NC USA




Hi Cilllol,
The ETC or IR (Impulse Response) can be thought of as being continuous, even though on the display it seems to start at the left and end at the right. This means as the delay offset value is changed so that the IR peak moves to the left, the data in front of the IR peak (earlier in time) is moved to the end of the display or wrapped around. It's like a big circle almost.

When the the delay offset is determined by the peak or auto function it determines the delay time by the highest value or peak of the IR or ETC. There is actually a rise to the left (earlier in time) if this peak. When the peak is moved in time to t=0 this initial rise is moved to the end of the display. So the peak you are seeing at the end of the FTT is really the initial rise of the IR.

_________________
Charlie Hughes
View user's profile Send private message Visit poster's website
PostPosted: Fri Feb 05, 2010 11:28 pm Reply with quote
Cillol
Member
 
Joined: 31 Jan 2010
Posts: 3




Thank you very much Charlie.
View user's profile Send private message
AFMG Network Forum Index -> AFMG SysTune
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
All times are GMT  
Page 1 of 1  

  
  
 Post new topic  Reply to topic  


Powered by phpBB © 2001-2003 phpBB Group
Theme created by Vjacheslav Trushkin
Variation by CodeWeavers and AFMG