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--- modal:modal-analysis:band-selection [2026/10/05 20:51] – reid_go-ci.com
+++ modal:modal-analysis:band-selection [2026/10/05 21:12] (current) – [Right-Click Menu] reid_go-ci.com
@@ Line 3: / Line 3: @@
 The **Band Selection** tab is the second step of Modal Analysis in EDM, after [[modal:modal-analysis:modal-data-selection#validating_signals|Modal Data Selection]]. Here you look at the selected FRFs together, find the frequencies where the structure has modes, and choose the frequency band that EDM will curve-fit in the **Stability Diagram**.
-FIXME **Screenshot:** The full Band Selection tab, with the signal list and display options on the left and a Multivariate MIF chart with two range cursors on the right.
+{{:modal:modal-analysis:band_selection_and_multivariative.png?}}
-{{:ema:band_selection_overview.png|}}
 The tab has two main areas:
@@ Line 14: / Line 13: @@
 **NOTE:** Band Selection uses the signals that have **Calculate modal** selected in the Modal Data Selection tab. To change which signals are used, go back to Modal Data Selection. When you change the signal selection there, the Band Selection and the Stability Diagram are cleared.
-**NOTE:** You cannot use this tab while a test is running.
 ===== Signal List =====
@@ Line 20: / Line 18: @@
 The list at the top of the settings panel shows each signal that will be used, with its **Signal name** and **DOFS**.
-Below the list, a summary shows the number of signals, the frame size (number of frequency lines), and the size of the data set as //response DOFs-by-reference DOFs//. For example, a roving hammer test with 20 response points and 1 reference shows //20-by-1//. If these numbers are not what you expect, check the DOFs in the Modal Data Selection tab.
+Below the list, a summary shows the number of signals, the frame size (number of frequency lines), and the size of the data set as //response DOFs-by-reference DOFs//. If these numbers are not what you expect, check the DOFs in the Modal Data Selection tab.
-**NOTE:** Data with more than one reference (MIMO) requires the multi-reference modal analysis option on your license. If it is not available, EDM shows a message and does not calculate the MIF.
 ===== Display Style =====
@@ Line 42: / Line 38: @@
 If you select **Mode indicator function (MIF)** together with **Display selected FRF** or **Display summation of all FRFs**, the chart is split in two. The MIF is shown on top and the FRF or the summation is shown below it.
-FIXME **Screenshot:** The split chart with a MIF on top and the summation of all FRFs below, with peak and valley markers shown.
+{{:modal:modal-analysis:real_mif.png?}}
-{{:ema:band_selection_split_chart.png|}}
 EDM adds peak or valley markers to the chart automatically, and a note below the display options tells you what to look for, for example //"The valleys indicate the natural frequencies"//.
@@ Line 57: / Line 52: @@
 **Type the frequencies**- Type a value in **Start frequency(Hz)** or **End frequency(Hz)** and press **Enter**. The range cursors move to the new value.
-FIXME **Screenshot:** Close-up of the Start frequency and End frequency boxes next to the chart, with the range cursors around a group of modes.
+{{:modal:modal-analysis:band_selected.png?}}
-{{:ema:band_selection_frequency_band.png|}}
-**NOTE:** The end frequency must be greater than the start frequency. If it is not, EDM shows a message and keeps the old value. Values outside the frequency range of the signals are changed to the nearest valid frequency.
 **Tips for choosing a band:**
@@ Line 73: / Line 65: @@
 Right-click on the chart to open the menu.
-FIXME **Screenshot:** The right-click menu open on the Band Selection chart.
+{{:modal:modal-analysis:plot_right_click.png?}}
-{{:ema:band_selection_context_menu.png|}}
-**Zoom Back**- Returns to the previous zoom level.
+**Zoom Back**- Returns to the previous zoom level.  **Un-zoom All**- Returns to the full view of the chart.
-**Un-zoom All**- Returns to the full view of the chart.
 **Add Range Cursor / Remove Range Cursor**- Adds or removes the two range cursors that set the frequency band.
@@ Line 84: / Line 73: @@
 **Peak Markers / Valley Markers**- Adds markers at the peaks or valleys of the curves. Use these to find the natural frequencies.
-**Remove All Markers**- Removes all the peak and valley markers.
+**Move Range Cursor to the Left**- Moves the start cursor to the lowest frequency currently shown in the chart.
-**Move Range Cursor to the Left**- Moves the start cursor to the lowest frequency shown in the chart.
+**Move Range Cursor to the Right**- Moves the end cursor to the highest frequency currently shown in the chart.
-**Move Range Cursor to the Right**- Moves the end cursor to the highest frequency shown in the chart.
 **Move Range Cursors to Both Ends**- Moves both cursors to the edges of the chart. Zoom in on a range of interest first, then use this option to set the band to exactly what you see.
 **Export Displayed Portion of Signals**- Exports the curves in the chart, between the range cursors, to a file. This option is available only when the range cursors are shown.
-**Report This Window**- Creates a report of the chart.
 **X Axis Format**- Shows the frequency axis on a **Linear** or **Log** scale.