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modal:modal-analysis:synthesis [2026/10/15 19:17] – [Modes] reid_go-ci.commodal:modal-analysis:synthesis [2026/10/15 19:28] (current) – reid_go-ci.com
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 The **Synthesis** tab checks how well your modal results describe the measured data. EDM uses the modes in a saved shape to rebuild (synthesize) each FRF, then draws the synthesized FRF on top of the measured FRF. If the modes were picked well, the two curves lie close together in the frequency band that was curve-fitted. The **Synthesis** tab checks how well your modal results describe the measured data. EDM uses the modes in a saved shape to rebuild (synthesize) each FRF, then draws the synthesized FRF on top of the measured FRF. If the modes were picked well, the two curves lie close together in the frequency band that was curve-fitted.
  
-{{:modal:modal-analysis:synthesis_full_display.png}}+{{:modal:modal-analysis:synthesis_full_tab.png}}
  
 **Settings**- the shape to use, the list of its modes, the residual options, and the fit results (**Correlation** and **Error**). **Settings**- the shape to use, the list of its modes, the residual options, and the fit results (**Correlation** and **Error**).
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 Both are selected by default. When you change either option, EDM calculates the synthesis again. Both are selected by default. When you change either option, EDM calculates the synthesis again.
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-FIXME **Screenshot:** The same FRF shown twice, once with the residuals selected and once with them cleared, to show how the residuals improve the fit near the ends of the band. 
-{{:ema:synthesis_residuals.png|}} 
  
 **TIP:** If the synthesized curve fits well near the modes but is offset from the measured curve near the ends of the band, make sure both residuals are selected. **TIP:** If the synthesized curve fits well near the modes but is offset from the measured curve near the ends of the band, make sure both residuals are selected.
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 These controls are not available when the table has only one signal. These controls are not available when the table has only one signal.
  
-FIXME **Screenshot:** Close-up of the signal table and the Previous signal, Run, Next signal and Speed controls. +{{:modal:modal-analysis:synthesis_signal_tab.png?}}
-{{:ema:synthesis_signal_table.png|}}+
  
 ===== Correlation and Error ===== ===== Correlation and Error =====
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 **Error**- The size of the difference between the two curves, compared with the size of the synthesized FRF. 0% means the curves are the same. Lower is better. **Error**- The size of the difference between the two curves, compared with the size of the synthesized FRF. 0% means the curves are the same. Lower is better.
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-FIXME **Screenshot:** Close-up of the Correlation and Error values for a well-fitted signal. 
-{{:ema:synthesis_correlation_error.png|}} 
  
 **What to look for:** **What to look for:**
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 **NOTE:** The **Correlation** and **Error** values are updated only when you select a signal. After you change the shape, select a signal again to update them. **NOTE:** The **Correlation** and **Error** values are updated only when you select a signal. After you change the shape, select a signal again to update them.
  
-===== Right-Click Menu ===== 
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-Right-click on the chart to open the menu. 
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-FIXME **Screenshot:** The right-click menu open on the Synthesis chart, with the Vertical Axis submenu showing. 
-{{:ema:synthesis_context_menu.png|}} 
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-**Zoom Back**- Returns to the previous zoom level. 
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-**Un-zoom All**- Returns to the full view of the chart. 
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-**Remove Cursor**- Removes one mode cursor from the chart. 
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-**Remove All Cursor**- Removes all the mode cursors from the chart. 
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-**Horizontal Axis**- Shows the frequency axis on a **Linear** or **Log** scale. 
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-**Vertical Axis**- Changes how the FRFs are displayed: 
-  * **Magnitude, dB + Phase** 
-  * **Log Magnitude + Phase** 
-  * **Magnitude + Phase** 
-  * **Real + Imaginary** 
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-**Edit Legend**- Changes the names and colors of the curves in the legend. 
  
-**Export Signal**- Saves the measured FRF and the synthesized FRF of the signal shown on the chart to a Universal File Format (''.unv'') file. Only the curve-fitted band is exported. Select a signal in the table before you use this option. 
  
 ===== FAQs ===== ===== FAQs =====