Manually setting delay

Robert Randolph

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May 1, 2018
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The loopback is not adjusting the delay time correctly for me. It reports no delay, however it is clearly approximately 8 samples off consistently on the scope.

This is a big deal for the measurements that I am doing. Is there a way to manually adjust the timing of the return signal relative to the test?
 

John Mulcahy

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Apr 3, 2017
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7,315
No, but measurements can be manually shifted using the controls on the Impulse graph.
offset.png
 

Robert Randolph

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This does not seem to fix issues with the other measurements though.

My measurement is showing a consistent group delay and phase rotation due to this, and it's problematic for publishing measurements.

Am I perhaps misunderstanding something somewhere?
 

John Mulcahy

REW Author
Joined
Apr 3, 2017
Messages
7,315
The adjustment is individual for each measurement. If all have the same timing offset the adjustment will need to be applied to each. REW doesn't have a global timing adjustment to apply to new measurements, though it is on the todo list to consider.
 

Vladimir_1953

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Hi!
I had the same problem - a large distance from the test pulse to the measured one so the unfolded phase was not visible. I used the automatic mode - the button " Estimate IR Delay ". Time can be adjusted manually in the window " t = 0 offset (ms) "

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