How to read 2 scales on 1 graph

Hi guys,
- I have a graph displaying 2 plots (amplitude and phase) at the same time.
- The amplitude scale on the left and phase scale on the right.
- I'm using a graph cursor in SINGLE-PLOT MODE.
I'm trying to switch between both scales using "Cursor.Yscale" and/or "Plot.YScaleIdx" properties to read the coordinates of the cursor according to each one of the scales.
While it works fine when the cursor is in FREE mode, I get the same reading before and after switching the scale in single-point mode. That is, Y1amp and Y1phase indicators display the same result.
The reading is done in a while loop as seen in the attached picture (example for 2 cursors).
Any idea what am I missing?
Attachments:
2 scales reading.png ‏77 KB

Hi Steve,
Thanks for the prompt reply.
Regarding your solution, I think it would give me the Y value of the second plot for the same Theta point. For example, applying solution#1 on the blue cursor in the picture would give me a result of about -115 deg. (the point the vertical line of the cursor crosses the red phase line. This is not what I wanted, I need the "vertical" value of the cursor on both scales (about -38dB on Amp. scale and about +78 deg. on the phase scale.
Or did I misunderstand?
Any way, you did give me a new thinking direction that seems to be working:
a) I read the Amp. scale position of the cursor and calculate the its relative part of the whole scale (for example, if the scale goes from 0 to -100db and the current position is -25dB, then I know the position is a quarter of the whole scale).
b) Now, I calculate a quarter of the phase scale and get the missing phase position.
It's a nice workaround.
Thanks for the idea!

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“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

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================
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>>
============
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I really appreciate for that.
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test-5M.txt ‏977 KB

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[Attachment graph_scale.gif, see below]
[Attachment graph_scale_prop_node.gif, see below]
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graph_scale.gif ‏4 KB
graph_scale_prop_node.gif ‏5 KB

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