NVGate Display

DISPLAY, GRAPHS & TRACES

Introduction

This section explains all the functions and information you can find in the graphs, windows and infotrace. The Display chapter also contains the information relative to the scales, graphic modes, display modes and the contextual menus.

Different windows which contain one or more graphs or traces can be created. You can also add or remove some information in the Infotrace using the Infotrace properties. Manage all the display settings using the right click in almost any area. For each result type there are different available options using the right click.

Add/remove

Allows to display the measurement results of the active plug-in analyzers. File:Add remove.png

You can display the Add/Remove window from the Display tab.

The maximum number of traces, windows and layout available are:

32 Traces per Window
32 Windows per Layout
16 Layouts per project.

see Add/remove page for more details.

Display Window

The windows allow to display signal traces. They can contain several traces in the same graph (multi-trace display) or several graphs (multi-graph display). The windows can display 1D graphs (viewmeter, RPM monitoring), 2D graphs (profiles, signal recording) or 3D graphs such as Waterfall display.

Areas (infotrace, graph, scale)

All the window areas described below are right clickable so the user can choose the active trace, apply an operator or change the scales.

File:Display Graphs Traces 13.png

Infotrace

Displays information about the graph:

Graph mode: magnitude, real...
List of traces with their states: available or not / displayed in all areas or not / not displayed. You can move into the infotrace to select a specified trace and to follow cursor’s value of this trace. Memorized traces are also displayed in the list (Memx)
Overall levels: Displays the RMS level in 2D windows containing spectra or time signals.
Cursor information: x, y, order, dx, dy if available
Marker arrays

Using keyboard arrows, you can select the active trace in the infotrace.

File:Display Graphs Traces 14.png

Traces names

The trace names indicate accurately what signal is displayed. A trace label consists of:

Item	Indicates	example
File	Trace origin when it does not come from current analysis	Measurement A
Source	Trace origin when it does not come directly from a plug-in	Wtf, Mem02, Oper
Plug-in	The plug-in which calculated the trace	FFT 1, OCT
Results type	The type of result in the plug-in	AcgSpct, Coh, Trigger block
Channel	The channel in the plug-in	[3]
Label	The input Label	Acc. top
Section	The section in the Waterfall	Z= 2500 RPM, X=375 RPM
Unit/Weighting	Applied alteration	Pk-Pk, PSD, (A)
Time Date	Of the result	15:50:14 03/10/15

In order to simplify the trace identifications in applications that manage many measurement points (structural dynamics, Roving impact hammer) the content of the front-end identification settings are inserted in the trace labels.

File:Display Graphs Traces 15.png

The trace labels display the Component, Node and Direction when the corresponding setting is different from its default value:

Component = None
Node = 0
Direction = Scalar

This applies individually, setting by setting and is independent for each channel.

Graph

Displays computed traces. It can be multi-trace or multi-graph.

Scale

Displays the magnitude and the grid of the graph

Pointer type

The pointer type is selected from the Measurement Tab./ Graphs group

Scale scrolling

Displayed when scale mode is selected and when the cursor is on a scale area. See cursor toolbar for details.

Zoom

Displayed when the magnifying tool is selected: Used to select a rectangle in a graphic area, or to zoom in with a by left click and drag.

Cursor

Displayed when cursor mode is selected: Used to move the cursor by left clicking and dragging.

Move

Displayed when ’move mode’ is selected. Used to change x and y scale boundaries by left clicking and dragging.

Rotation

Displayed when the rotation tool is selected: Used to rotate a 3D graph.

Marker

Used to modify the marker position and properties.

Contextual menu

Apply any action to the displayed traces and/or graphs by using the contextual menus on the selected area.

File:Display Graphs Traces 22.png

Infotrace menu

Customize

From the Infotrace, right click and select Customize.

This dialog box is used to select the information to be displayed in the infotrace (cursor coordinates, marker values…).

All checked items are displayed, unchecked items are not displayed.

Select All: Selects all items
Unselect All: Unselects all items
Ok: Applies the changes and closes the dialog box.
Cancel: ignores the changes and closes the dialog box.

Auto width

Sets the Infotrace area width to the width of the largest element currently displayed.

Copy marker table

Copies the marker table content to the clipboard in Excel format, in order to paste it in Excel. Each column/line of the table becomes a column/line in the Excel sheet.

See the "Copy marker" topic p 101 for more details about the marker table copy.

Close

Hides the Infotrace area.

Graph menu

X zoom

All of these functions are available if there is no active X automatic autoscale.

Zoom in: Zoom in on the horizontal scale by placing the cursor position in the center.

If the center is at the minimum value, you may not zoom. You may zoom if the X scale width is greater than the active signal precision in X.

Zoom out: Zoom out from the horizontal scale by placing the cursor position in the center.

If the center is at the minimum value, you may not zoom. You may zoom if Z min and max values are included in the min and max value gap defined by the active signal of the window. Full width.

Restores the X min and max values defined by the active signal of the window.

Full width: Restores the Z min and max values defined by the active signal of the window.
Auto-scale: Set min and max values of the X scale to the X min and max values of the active signal for the "On active" item and to the X min and max values of all signals of the window for "On all" item. A margin is added to these values to facilitate visibility. The X width is always more than X active signal precision.

Y zoom

Zoom in: Used to zoom in on the vertical scale. You may zoom in if the scale width is greater than the active signal precision in Y.
Zoom out: Used to zoom out from the vertical scale. You may zoom in if min and max values are included in Y min and max value gap defined by the active signal of the window. Full width:

Restores the Y min and max values defined by the active signal of the window.

Full width: Restores the Z min and max values defined by the active signal of the window.
Auto-scale: Sets min and max values of the Y scale to the Y min and max values of the active signal for the "On active" item and to the min and max values of all signals of the window for "On all" item. A margin is added to these values to facilitate visibility. The Y width is always more than Y active signal precision.

Z zoom

All of these functions are available if there is no active X automatic autoscale.

Zoom in: Used to zoom in on the Z scale. You may zoom if the scale width is greater than the active signal precision in Z.
Zoom out: Used to zoom out from the Z scale. You may zoom if min and max values are included in Z min and max value gap defined by the active signal of the window.
Full width: Restores the Z min and max values defined by the active signal of the window.
Auto-scale: Sets min and max values of the Z scale to the Z min and max values of the active signal. A margin is added to these values to facilitate visibility. The Y width is always greater than Y active signal precision.

X scale

Changes X scale type of the area to the selected type. Available types (according to the kind of the area) are:

Linear
Logarithmic

Y scale

Changes Y scale type of the area to the selected type. Available types (according to the kinds of the area and the window) are:

Linear
Logarithmic
DB

Z scale

Changes Z scale type of the area to the selected type. Available types (according to the kinds of the area and the window) are:

Linear
Logarithmic
dB

User marker manager

This dialog is only available for the Monitoring and Compressed windows. It contains the list of all record markers of the record signal opened. In the monitoring window, each record marker comment can be modified. In the compressed window, comments cannot be modified.

Reset Min & Max

Restores min and max values for the selected scale

Window menu

Display

In each window, several display modes are available, depending on the graph type.

Graph type	Display mode
Time signal	Multi-trace Multi-graph Time multi-trace 3D
Spectral	Magnitude Phase Real part Imaginary part Magnitude/Phase Real/Imaginary Polar Real part 3D Imaginary part 3D Magnitude 3D Phase 3D Real part multi-graph Imaginary part multi-graph Magnitude multi-graph Phase multi-graph Merged magnitude/phase
Nth Octave	Multi-trace Multi-graph
Viewmeter/Monitoring	Continuous Viewmeter Brick Digital Digital magnitude & phase
Waterfall	Magnitude Phase Real part Imaginary part
Monitoring/Compressed signal	Multi-graph (Only one mode available)
Profile	Multi-trace Multi-graph
Complex profile	Magnitude Phase Real part Imaginary part Magnitude/Phase Real/Imaginary Real part multi-graph Imaginary part multi-graph Magnitude multi-graph Phase multi-graph Merged magnitude/phase
Lissajoux	Multi-trace (Only one mode available)
Constant Band Tracking	Magnitude Phase Real part Imaginary part Magnitude/Phase Real/Imaginary Real part multi-graph Imaginary part multi-graph Magnitude multi-graph Phase multi-graph Merged magnitude/phase

	Multi-trace: This mode displays all window traces of the same type in one graph. In several window types, two multi-trace graphs are displayed in the same window: for example, one for the Real part and one for the imaginary part. In this mode, a magnitude gathering mode can be activated in the set preferences window: this mode displays signals by creating one area for each Y magnitude included in the window. If two or more signals have the same Y magnitude, they will be displayed in the same area.
	Multi-graph: This mode displays one graph per trace in the window.
	Multi-trace 3D: This mode displays all traces in the same 3D graph.
	Real part: This mode displays the real part of the signal. It can be displayed in multi-trace, multi graph, or multi-trace 3D, depending on the graph type.
	Imaginary part: This mode displays the imaginary part of the signal. It can be displayed in multi-trace, multi graph, or multi-trace 3D, depending on the graph type.
	Magnitude: This mode displays the magnitude of the signal. It can be displayed in multi-trace, multi graph, or multi-trace 3D, depending on the graph type.
	Phase: This mode displays the phase of the signal. It can be displayed in multi-trace, multi graph, or multi-trace 3D, depending on the graph type.
	Merged magnitude/phase: This mode displays the magnitude and the phase of the signal in the same area. This is a multi-trace mode. The module scale is on the left of the graph and the phase scale is on the right.

Properties

See "Graph type" topic p 37.

Always on top: the window will be on top
Default: reset the all the settings to the default settings
Apply to: applies the settings either to All windows or just for the Active window
Save as user preferences: save the properties settings

Active trace

Select the active trace of the window. When the signal changes, the Y scale is updated to the Y magnitude of the signal. Only signals with the same Y magnitude as the active signal are displayed. The others are displayed as unavailable in the info-trace.

The color of the cursor corresponds with the trace’s color; you can select in the infotrace the active trace and its linked cursor using arrays of the keyboard.

Remove trace

Removes selected trace from the window. If this trace is the active one, the active signal is changed. A trace can be removed using ’Ctrl suppr’.

Memorize trace

Memorizes the active trace of the active window at any time (independently from Run and Stop event).

The memorized trace is named Memx: active trace name. There’s an incrementation of the memorized traces id (x). You can save the memorized traces by adding it to the result selection.

Note: you can memorize an active trace by using the insert button of the keyboard.

Clear memory

Clear all memorized traces. You can remove specific memorized traces with the ’Remove trace’ command.

AutoMemorize

’AutoMemorize’ traces consists in memorizing traces on the stop event. Select the graph to be memorized.

By using an operator on an active trace and his associated memorized traces is available by right-clicking on the graphs and selecting ’operators’. This operator will be automatically updated if a memorized trace is added or deleted (see also operators).

During a multi-run, the average on automatic memorized trace is done automatically for each run, and the average trace is automatically updated.

Auto scale Y on all

Sets min and max values of the Y scale to the Y min and max values of all signals displayed in the graph. A margin is added to these values to facilitate visibility. The Y width is always more than Y active signal precision.

Cascade view

Present the current active trace in a cascade view of the last 50 (default value) recovered results.

This is dedicated for monitoring used, this is not a waterfall (acquisition mode in real-time). The Z-axis represents the number of slices independently from any reference such as time or RPM evolution.

This function is available only for 2D spectra and trigger blocks.

Warning: if you are in manual trigger, or if there is an absence in the time, you won’t be able to notice it with the cascade view. In the following example, a pause has been made during the measurement; on the waterfall 3Dview (with time for reference) it is possible to see this pause. In the cascade view the pause won’t be noticed (number of block for reference).

Weighting

These commands are available only for results with an X-Axis that represents frequencies. The operations are performed in the spectral domain

None: No weighting is applied.
A Weighting: Selects the "A" weighting
More: Used to select specialized weighting

See more details about Weightings in NVGate Filters.

Add to Result selection

This command adds all the results displayed in the window to the list of results that must be saved in a measurement. If the result is already on the list, it is not added. Some results displayed cannot be saved (Instant trigger of the front end, profile of a DC input).

Copy graph(s)

This command copies the active graph in the format ’wmf’, this command is not available for 3D Waterfall.

Copy bitmap

This command copies graph in the format ’.bmp’

Copy data

This command copies data in order to export them in Excel. This will export all point’s values from the active graph. NVGate export values with a point as separator and in engineer mode. This command is available for all spectra and profiles (even waterfall profiles).

If the graph is displayed with complex values, then the ’copy data’ command allows to export phase and module values.

Example:

Natural values:

Values displayed are values from the Active trace:

Complex values:

For complex values the ’Copy data’ will displayed phase and module values.

Copy to Mask

Adds the result to the project template results. This result is then available for editing and use as a template.

Add Alarm

Dialog box to create an alarm. An alarm compares a dynamic signal with a template result. The result of the comparison can be used in the macro to perform certain tests.

To make this option available, a result template must be added to the window (using drag & drop for example).

Go to the "Chapter 5: Tools" to see more details about the Result template.

To create an alarm, select a result from the top list, a template from the bottom list and click the Add button. The list on the right displays a list of the existing alarms.

Browsers Dataset windows

NVGate features dialog boxes to browse the data from the project manager (local data) or external sources. Two type of browsers are proposed; Item selection and set selection.

These 2 dialogs share common functions:

1.

The filter will show only the items matching with the entered keyword. The keyword match are searched in the name, the properties values and the comments.

2. The dialog starts operating immediately. Nevertheless with large data set, the dialog may take a few second to scan all the properties of each Item. In such case the scan progress is displayed here. The filtering remains incomplete until the scan finished.

3. Flat/Tree: This button allows switching between a tree view (like in the project manager or Windows explorer) and flat view where all Items are listed regardless the hierarchy.

4. The searched properties. Show the properties used for filter search (see §1) Unselected properties will be ignored during the search.

5. Show/Hide properties. Right click on the properties line to select which ones are visible in the columns.

Item selection browser

This browser is used to open, load or edit unique Items from the local NVGate data. It is used for the following operations:

Open Project
Load Signal for post-analysis
Load Setup
Edit Measurement

The right side summarizes the OROS user and User properties of the current Item. This helps navigating in the list of Items in order to find the searched one.

Drag & drop the right border to resize the dialog. The complete properties table appears to filter by properties as in the Set selection dialog.

Set selection browser

This browser is used to select a set of Items to apply batch, filter or transfer this set. It is used for the following operations:

Share Projects/Measurements and Models
Collate Projects/Measurements and Models
Filter local NVGate data
Batch report selection

The Set selection browser features check boxes on the left sides for Items selection. The properties table allows efficient filtering, offering fast selection of a coherent set of data.

Graph type

Time

Time graphs display time real signals.

Source signals (plug-in/process)

The following results may be displayed as time graphs:

Front-end: Signal.
Monitor: Triggered block.
FFT x: Triggered block, weighted block.
SOA x: Triggered block, weighted block.

Properties

X-Axis
Linear: uses linear scale for X-axis units.
Y-Axis
Linear: uses linear scale for Y-axis units.
Logarithmic: uses logarithmic scale for Y-axis units.
Display mode
Multi-graph: overlays all traces using one graph per trace on the same window.
Multi-trace: overlays all traces in one graph.
Multi-trace 3D: overlays all traces in one 3D graph.
Magnitude gathering: if this mode is activated and when a multi-trace mode is selected, an area is created for each different Y magnitude: all the signals with the same Y magnitude are in the same area. If there is only one different Y magnitude, all the signals are in the same area.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Filling mode: if selected, all the curves of the windows are filled from:
The bottom of the area if Y scale is a dB one or Logarithmic one.
The 0 value if the Y scale is linear.

Spectral

Spectral graphs display narrow band (complex) spectra.

Source Signals

The following results may be displayed as spectral graphs:

Monitor: Inst. spectrum, Avg spectrum.
FFT x: Inst. spectrum, Avg spectrum, Inst cross-spectrum, Avg cross-spectrum, FRF H1, FRF H2, spectrum.
Sync. order x: Ord. inst. spectrum, Ord. avg. spectrum, Ord. spectrum.

Properties

X Axis
Linear: uses linear scale for X-axis units.
Logarithmic: uses logarithmic scale for X-axis units.
Y Axis
Linear: uses linear scale for Y-axis units.
Logarithmic: uses logarithmic scale for Y-axis units.
dB: uses reference dB scale for Y-axis units.
Display mode
Magnitude: overlays all magnitude traces on a single graph.
Phase: overlays all phase traces on a single graph.
Real part: overlays all real parts traces on a single graph.
Imaginary part: overlays all imaginary part traces on a single graph.
Magnitude/phase: overlays all magnitude traces on the upper graph and all the phase traces on the lower graph.
Real/imaginary: overlays all magnitude traces on the upper graph and all the phase traces on the lower graph.
Polar: overlays all complex traces on a polar graph:  = magnitude,  = phase.
Real part 3D: displays all real part traces as a 3D graph arranged along the Z-axis.
Imaginary part 3D: displays all imaginary part traces as a 3D graph arranged along the Z-axis.
Magnitude 3D: displays all magnitude traces as a 3D graph arranged along the Z-axis.
Phase 3D: displays all phase traces as a 3D graph arranged along the Z-axis.
Real part multi-graph: displays all real part traces using one graph per trace in the same window.
Imaginary part multi-graph: displays all imaginary part traces using one graph per trace in the same window.
Magnitude multi-graph: displays all magnitude traces using one graph per trace in the same window.
Phase multi-graph: displays all phase traces using one graph per trace in the same window.
Phase/Magnitude: overlays all phase traces on the upper graph using 1/3 of window space and all the magnitude traces on the lower graph using 2/3 of the window.
Merged Magnitude/Phase: displays all magnitude and phase part traces as a unique graph.
Magnitude gathering: if this mode is activated and when a multi-trace mode is selected, an area is created for each different Y magnitude: all the signals with the same Y magnitude are in the same area. If there is only one different Y magnitude, all the signals are in the same area.

Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Filling mode: if selected, all the curves of the windows are filled from:
the bottom of the area if Y scale is a dB one or Logarithmic one
the 0 value of the Y scale is linear.
Dynamics
90 dB: resizes the Y-axis to 90 dB dynamics starting from +20 dBV.
110 dB: resizes the Y-axis to 110 dB dynamics starting from +20 dBV.
130 dB: resizes the Y-axis to 130 dB dynamics starting from +20 dBV.
150 dB: resizes the Y-axis to 150 dB dynamics starting from +20 dBV.

Phase

-180° -> 180°: sets the phase graph Y-axis between –180° to +180°.

0 -> 360°: sets the phase graph Y-axis between 0 to +360°.

Rotations: sets the number of rotations to be displayed on the Y-axis.

Example for 5 rotations:

Lissajous

Parametric graph of one triggered block with another one for reference.

Source Signals

The following results may be displayed into Lissajous graphs:

FFT x: Lissajous.

The perimeter of the Lissajous corresponds of the FFT length’s block.

You can use filters on this kind of graph, as integration or a double integration.

Properties

X Axis
Linear: uses linear scale for X-axis units.
Y Axis
Linear: uses linear scale for Y-axis units.
Display mode
Multi-trace: overlays all traces on a single graph.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Orthonormal view: if checked, the graph is displayed in an orthonormal area.

Nth octave

Displays nth octave band graph.

Source Signals

The following results may be displayed as nth octave graphs:

Nth-Octave: 1/n octave, Avg 1/n octave.

Properties

Y Axis
Linear: uses linear scale for Y-axis units.
Logarithmic: uses logarithmic scale for Y-axis units.
dB: uses reference dB scale for Y axis units.
Display mode
Bar: bar representation
Step: step representation
Rectangle: overlaid rectangle
Filled: overlaid filled rectangles.
Display mode
Multi-trace: overlays all traces on a single graph.
Multi-graph: one graph for each trace.
Magnitude gathering: if this mode is activated and when a multi-trace mode is selected, an area is created for each different Y magnitude: all the signals with the same Y magnitude are in the same area. If there is only one different Y magnitude, all the signals are in the same area.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Overall level
Linear: if checked, the linear global level is displayed.
Weighted: if checked and available, the weighted level is displayed.
Frequencies
Exact: displays exact band center frequency.
Preferred: displays preferred frequencies, i.e rounded values for the central frequencies. Preferred frequencies are only available for octave and 1/3rd octave windows: in the octave. If this mode is selected in 12th and 24th octave windows, exact frequencies are displayed.
Dynamics
90 dB: resizes the Y-axis to 90 dB dynamics starting from +20 dBV.
110 dB: resizes the Y-axis to 110 dB dynamics starting from +20 dBV.
130 dB: resizes the Y-axis to 130 dB dynamics starting from +20 dBV.
150 dB: resizes the Y-axis to 150 dB dynamics starting from +20 dBV.

Viewmeter

Displays scalar value graphs.

Source Signals

The following results may be displayed as nth viewmeter graphs:

Front-end: DC.
Monitor: DC, Max, Min, Kurtosis.
Recorder: RMS
FFT X: Order & Overall
SOA X: Order & Overall
1/n Octave: Overall values
Tachometer: Angular speed

Properties

This page defines the way in which the scalar results are displayed.

Display mode: There are two types of display:
Bar graph

Digital display

Y Axis
Linear: uses linear scale for Y-axis units.
Logarithmic: uses logarithmic scale for Y-axis units.
dB: uses reference dB scale for Y-axis units.
Display max, Display min: Displays the min and the max scalar value as a cursor. The color of the cursor can be freely selected. This property only applies to bar graphs.
Display low level: Changes the color of the display when the value is below this level. The color can be freely selected.
Display high level: Changes the color of the display when the value is higher than this level. The color can be freely selected.
Display alarm level: Changes the color of the display when the value is higher than this level. The color can be freely selected.
Brick height: Defines the height of the bricks for the viewmeter and brick display modes.
Save as user preference: When this box is checked, the value is given as a percentage of the full scale, and may be applied to any graph.

Monitoring

Displays compressed signal graph during recording.

Source Signals

The following results may be displayed as nth monitoring graphs:

Recorder: monitoring signal

Properties

Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.

X Axis
Absolute time: displays the time from windows format.
Relative time: displays the duration of the record. The beginning of the record is set to 0.
Auto: selects absolute or relative time depending on the duration of the record. For records smaller than 2s, the relative time is displayed, for others, the absolute time is chosen.

Y Autoscale
Continuous: the Y scale is automatically adjusted to the current min and max y values of the window traces with a margin to facilitate visibility.
Disabled: Y autoscale is not activated.

Compressed signal

Displays compressed recorded signal graphs.

Source Signals

The following results may be displayed as nth compressed signal graphs:

Zoomed signal

This kind of zoom can be done by ’drag & drop’ the selected zone you want to analyze.

After displaying the zoomed signal, on the recorded signal you can modify your zoom at any time. All changes would be displayed automatically in the zoomed signal as soon as you modified your zoomed zone.

Check record

Check record function is for verifying the signal data in details just after its acquisition. When NVGate records a signal, the save window proposes to display the zoom signal view of the saved measurement. The signal is displayed after closing the window with OK.

It is then possible to:

Zoom into the signal by drag & dropping on the graph
Listen to the tracks through the PC loudspeaker by clicking on the loudspeaker icon. Select the listened track with the up/down arrows.

Properties

Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.

X Axis
Absolute time: displays the time from windows format.
Relative time: displays the duration of the record. The beginning of the record is set to 0.
Auto: selects absolute or relative time depending on the duration of the record. For records smaller than 2s, the relative time is displayed, for others, the absolute time is chosen.

Profile

Displays scalar profile.

Source Signals

The following results may be displayed as nth compressed signal graphs:

Monitor: DC, Max, Min, Kurtosis

Front-end: DC

Tachometer: RPM

Properties

X Axis
Linear: uses linear scale for X-axis units.
Y Axis
Linear: uses linear scale for Y-axis units.
Display mode
Magnitude: overlays all magnitude traces on a single graph.
Phase: overlays all phase traces on a single graph.
Magnitude gathering: if this mode is activated and when a multi-trace mode is selected, an area is created for each different Y magnitude: all the signals with the same Y magnitude are in the same area. If there is only one different Y magnitude, all the signals are in the same area.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Filling mode: if selected, all the curves of the windows are filled from:
the bottom of the area if Y scale is dB or Logarithmic.
the 0 value if the Y scale is linear.

X Autoscale
Continuous: the X scale is automatically adjusted to the current min and max x values of the window traces.
Disabled: X autoscale is not activated.

Y Autoscale
Continuous: the Y scale is automatically adjusted to the current min and max y values of the window traces with a margin to facilitate visibility.
Disabled: Y autoscale is not activated.

Complex profile

Source Signals

The following results may be displayed as complex profile graphs:

FFT X: Order profile
Waterfall: Order profile
SOA X: Order profile

Properties

X Axis
Linear: uses linear scale for X-axis units.
Y Axis
Linear: uses linear scale for Y-axis units.
Logarithmic: uses logarithmic scale for Y-axis units.
dB: uses reference dB scale for Y axis units.
Display mode
Magnitude: overlays all magnitude traces on a single graph.
Phase: overlays all phase traces on a single graph.
Real part: overlays all real part traces on a single graph.
Imaginary part: overlays all imaginary part traces on a single graph.
Magnitude/phase: overlays all magnitude traces on the upper graph and all phase traces on the lower graph.
Real/imaginary: overlays all magnitude traces on the upper graph and all phase traces on the lower graph.
Polar: displays in polar coordinates, the phase and the amplitude on a single graph.
Real part multi-graph: displays all real part traces using one graph per trace in the same window.
Imaginary part multi-graph: displays all imaginary part traces using one graph per trace in the same window.
Magnitude multi-graph: displays all magnitude traces using one graph per trace in the same window.
Phase multi-graph: displays all phase traces using one graph per trace in the same window.
Phase/Magnitude: overlays all phase traces on the upper graph using 1/3 of window space and all the magnitude traces on the lower graph using 2/3 of the window.
Merged Magnitude/Phase: displays all magnitude and phase parts traces on a single graph.
Magnitude gathering: if this mode is activated and when a multi-trace mode is selected, an area is created for each different Y magnitude: all the signals with the same Y magnitude are in the same area. If there is only one different Y magnitude, all the signals are in the same area.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Filling mode: if selected, all the curves of the windows are filled from:
The bottom of the area if Y scale is dB or Logarithmic.
The 0 value if the Y scale is linear.
Dynamics
90 dB: resizes the Y-axis to 90 dB dynamics starting from +20 dBV.
110 dB: resizes the Y-axis to 110 dB dynamics starting from +20 dBV.
130 dB: resizes the Y-axis to 130 dB dynamics starting from +20 dBV.
150 dB: resizes the Y-axis to 150 dB dynamics starting from +20 dBV.
Phase
-180° -> 180°: sets the phase graph Y-axis between –180° to +180°.

0 -> 360°: sets the phase graph Y-axis between 0 to +360°.

File:Display Graphs Traces 105.gif

Rotations: sets the number of rotations to be displayed on the Y-axis.

Example for 5 rotations:

X Autoscale
Continuous: the X scale is automatically adjusted to the current min and max x values of the window traces.
Disabled: X autoscale is not activated.

Y Autoscale
Continuous: the Y scale is automatically adjusted to the current min and max y values of the window traces with a margin to facilitate visibility.
Disabled: Y autoscale is not activated.

Coherence

Displays coherence graphs.

Source Signals

The following results may be displayed as coherence graphs:

FFT X: Coherence

Properties

X Axis
Linear: uses linear scale for X-axis units.
Y Axis
Linear: uses linear scale for Y-axis units.
Display mode
Multi-graph: overlays all traces on a single graph.
Multi-trace: displays all traces using one graph per trace in the same window.
Time multi-trace 3D: overlays all traces on a single 3D graph.
Magnitude gathering: if this mode is activated and when a multi-trace mode is selected, an area is created for each different Y magnitude: all the signals with the same Y magnitude are in the same area. If there is only one different Y magnitude, all the signals are in the same area.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Filling mode: if selected, all the curves of the windows are filled from:
the bottom of the area if Y scale is dB or Logarithmic.
the 0 value if the Y scale is linear.

Shaft View

The shaft view or "marguerite" shows the trigger block of FFTs and SOA around one revolution. This graph includes angular cursors (with delta-angle) useful for reading the location of peaks.

Note that in order to provide a stable trace, the corresponding plug-in must be triggered by a keyphasor. This keyphasor (any edge event) being the phase reference of each revolution. In the case of synchronous order analysis, the plug-in is automatically triggered on the tach. pulses.

The shaft view shows the first entire revolution contained in the trigger block. If less than one revolution is contained in the trigger block, nothing is displayed. A tachometer must be connect to the FFT or SOA plug-in in order to show traces in the shaft view.

The rotation indicator (and the angle labels arrangement 0 to 360°) is defined by the user’s preferences or directly from the window’s properties.

The keyphasor location is also user definable: It may take place every 45° along the complete revolution.

All graphs in a window have the same rotation and keyphasor location.

Source Signals

The following results may be displayed as Triggered Shaft View graphs on condition that a tachometer is associated to the plug-in:

FFT x: Triggered Shaft View
SOA x: Triggered Shaft View

The following results may be displayed as Average Shaft View graphs on condition that a tachometer is associated to the plug-in and that time average is chosen:

FFT x: Average Shaft View
SOA x: Average Shaft View

Properties

X Axis
Linear: uses linear scale for X-axis units.
Y Axis
Linear: uses linear scale for Y-axis units.
Display mode
Multi-graph: overlays all traces on a single graph.
Multi-trace: displays all traces using one graph per trace in the same window.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Filling mode: if selected, all the curves of the windows are filled from:
the bottom of the area if Y scale is dB or Logarithmic.
the 0 value if the Y scale is linear.
Key phasor
Allows to specify the position of the key phasor by entering the shift angle in ° and the direction left or right.
Rotation indicator
Counter-Clockwise: defines a counter-clockwise rotation.
Clockwise: defines a clockwise rotation.

Waterfall graphs (2D view, 3D view, color spectrum)

Slices sorting selection in 2D/3D

NVGate is able to display unwrapped run-up/down profiles The "Sort points" selection allows displaying the data along one X scale but sort it along another reference.

The following example shows data displayed with tachometer speed on the X axis speed but sorted along to the time:

This is useful for mixed run up/down to see hysteresis.

Second X axis in profiles

For applications with mixed run-Up/Down (RPM, Torque, Temperature, etc...), it is useful to see the results evolution according to their occurrence (time, slice) but keeping the up/down information. This feature allows viewing the data unwrapped.

Waterfall display features different type of view of the stacked results. All views are related to the same 3D space:

The Z-axis is the selected reference (RPM, time or number of slices in order of the acquisition) its range is the waterfall depth. You can change the reference for z-axis at any time. This is available for 2D and 3D view.

The Y-axis is the selected magnitude; this can be changed at any time.

The X-axis is the frequency.

Tachometer centered on FFT/SOA blocks

This allows centering tachometer speed at the center of the FFT/SOA trigger block(s). It is useful with long trigger blocks (High resolution analyses) to perfectly match the actual data with the order cursor or section.

With classical tach:

The RPM is collected at the end of the analysis block.

This situation leads to an offset in the waterfall calculation of the orders (cursors, sections). For a run up, as the angular speed is over evaluated, the order calculation is lower than the actual ones.

With centered tach:

The RPM is calculated as the average speed during the block duration to be synchronized with the analyzed data.

With the centered tachometer, the orders calculations match more accurately the actual orders in waterfall.

The computation of the angular speed takes in account the averaging, triggering and overlap used in the plug-in.

The centered speed is calculated as:

The RPM centering and averaging is done in the analysis plug-in prior to be connected to the waterfall. To use the centered tach simply add the said tachometer to the corresponding plug-in (FFTn or SOAn). These additional tachometers are available in the waterfall as soon as one of the result of the plug-in is added to the waterfall.

1. Add Tach to the Plug-in,

2. Add plug-in results (Spectra, orders, etc..) to the waterfall,

3. Display the waterfall

4. Select the Plug-in Tach, as a tachometer and reference

display modes :

5. 3D isometric

6. 3D perspective:

7. Freq/Time Colormap:

8. Time/Freq Colormap:

Orbit

Displays the AC dynamic motion of the center of a rotating shaft. It generates a two-dimensional image.

Source Signals

The following results may be displayed as Orbit graphs on condition that a tachometer is associated to the plug-ins:

FFT x: Raw Orbit, Synthetized Orbit ( for customer with FFT-diag option)
SOA x: Raw Orbit, Synthetized Orbit (For customer with ORD-Diag option)

Note :

The Raw Orbit graph displays an entire number of complete rotations contained in one block. At least one rotation is required.

The FFT should better be triggered by the Ext. Sync. channel.

If the FFT is bad configured, it is possible that no results are shown.
The FFT synthtetized Orbit is only available for customer with FFt-CBT option. The FFT synthetized Orbit is filtered using CBT technics. this method provide a non accurate phase value on synthetiseed orbit. For acurate synthetize Orbit phase, you need to use the SOA Synthetized Orbit.

The ORD Synthesized Orbit graph is calculated with the orders of two channels selected. For a couple "ChannelA, ChannelB" up to 8 Synthesized Orbits can be selected. Each orbit corresponds to an order which appears in the tracked order setting.

The display of the Synthesized Orbit is done on 360 points (1 point per degree).

Properties

X Axis
Linear: uses linear scale for X-axis units.
Y Axis
Linear: uses linear scale for Y-axis units.
Display mode
Multi-graph: overlays all traces on a single graph.
Multi-trace: displays all traces using one graph per trace in the same window.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Filling mode: if selected, all the curves of the windows are filled from:
the bottom of the area if Y scale is dB or Logarithmic.
the 0 value if the Y scale is linear.
Rotation indicator
Counter-Clockwise: defines a counter-clockwise rotation
Clockwise: defines a clockwise rotation.
Autoscale
Continuous: applies a continuous autoscale during the measurement.
Disabled: disable the autoscale.
Orientation
Allows to shift X-axis and Y-axis from a defined angle to the left or to the right; X and Y are nevertheless always orthogonal.
Number of revolutions
Number of revolution displayed in the graph.

Gap

Displays the shaft center DC position changes.

Source Signals

The following results may be displayed as Gap graphs:

Waterfall: Gap

The Gap is available in the Waterfall for the Monitor and Time domain analyzer plug-ins and only for the DC values.

Properties

X Axis
Linear: uses linear scale for X-axis units.
Y Axis
Linear: uses linear scale for Y-axis units.
Display mode
Multi-graph: overlays all traces on a single graph.
Multi-trace: displays all traces using one graph per trace in the same window.
Trace color
Number: selects the trace number for color modification.
Color box: click on this box to modify the color of the selected trace.
Filling mode: if selected, all the curves of the windows are filled from:
the bottom of the area if Y scale is dB or Logarithmic.
the 0 value if the Y scale is linear.
Rotation indicator
Counter-Clockwise: defines a counter-clockwise rotation.
Clockwise: defines a clockwise rotation.
Autoscale
Continuous: applies a continuous autoscale during the measurement.
Disabled: disable the autoscale.
Orientation
Allows to shift X-axis and Y-axis from a defined angle to the left or to the right; X and Y are nevertheless always orthogonal.
Tags
Visible: Tags are visible on the graph.
Number: defines the tags density on the plot (min or max).

Scale

The axis values and behavior can be set in the Axis properties dialog box.

Min: Enabled only when the User Define type is selected. It sets the minimum value assigned to the scale.
Max: Enabled only when the User define type is selected. It sets the maximum value assigned to the scale.
Type:

- User Define: Used to select the min and max scale values.

- Autoscale on active trace: The minimum and maximum scale values are automatically adjusted to the values of the active trace.

- Autoscale on all traces: The minimum and maximum scale values are automatically adjusted so that every trace is fully visible.

- Type: Changes the type of scale (Linear, logarithmic or dB). Only the available types are enabled.

- Enable/disable zoom: when checked, it is impossible to make any change to the scale.

Cursors

Style

	Vertical line: Displays a single line.		Vertical dashed line: Displays a single dashed line.
	Vertical with rectangle: A rectangle is displayed around the selected point.		Cross hair: No line is displayed but there is a target around the selected point.
	Vertical + horizontal: Displays 2 lines, an horizontal and a vertical that cross the selected point.

Dual

Select 2 cursors from the window properties. That allows to compute delta values on X-axis and Y-axis.

Cursor Link

Link the cursors of different graphs that share the same unit on the X-Axis. Once linked, all the cursors move at the same time and the same position.

Link all cursors in one click

Cursors can be linked one by one to follow the same X-coordinate. It is now possible to link/unlink from the cursor contextual menu.

This applies to the link by reference and covers all the cursors of the current layout.

Waterfall link

Link: Link the cursor of different graphs that share the same unit on the X-Axis. Once linked, all the cursor moved at the same time and the same position.

Link by reference: Link the cursor of several Waterfalls referring to their internal index. Enables linking cursors that are displayed in graphs that do not share the same unit.

Free: Release a cursor that has been previously linked.