How to set the cursor on the charts to the zero mark?

Vladimir_1953

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Preamp, Processor or Receiver
ROTEL RC-990
Main Amp
ROTEL RB-991
Universal / Blu-ray / CD Player
DENON DCD-2000AE, ROTEL RCD-991AE
Front Height Speakers
Dynaudio Crafft
Hello everyone!
How to tie the cursor position on the phase grid to the zero mark? It is not set quite accurately yet.
This is necessary to accurately determine the tuning frequency of the phase inverter port.
 

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This is necessary to accurately determine the tuning frequency of the phase inverter port.
The accuracy you showed in the screenshot is already good for your purpose. Also, phase crossing through zero will not always be the frequency of port tuning.
 

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The accuracy you showed in the screenshot is already good for your purpose. Also, phase crossing through zero will not always be the frequency of port tuning.
What is the exact frequency of the port tuning?
I always thought that the zero crossing was the absolute indicator.

How and with what to determine the exact tuning frequency of the subwoofer phase inverter port?
 
How to tie the cursor position on the phase grid to the zero mark?
The zero position will depend on the number of grid lines and the grid interval. It can be forced by suitable choices of the Y axis limits for SPL and for phase, but you can also select the option in the Graph controls to draw a line at phase = 0.

1743781536458.jpeg
 
The zero position will depend on the number of grid lines and the grid interval. It can be forced by suitable choices of the Y axis limits for SPL and for phase, but you can also select the option in the Graph controls to draw a line at phase = 0.

View attachment 82455
Thank you, John!
I activated the options as you recommended.
But I can't set =0, only a little higher or a little lower.

Is it possible to enter the parameter =0 manually?
 

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