Measurement Settings (Bandwidth & Frequency Panel)
Setup the bandwidth and frequency in the Bandwidth & Frequency panel. In the upper half of the panel are parameters related to the bandwidth of the signal being measured. The bottom half of the panel is for setting up frequency parameters. In the frequency section there is a button to switch the frequency parameters from Center and Span to Lower bound and Upper bound. Set these parameters as desired.
• RBW: Modifies the resolution bandwidth of the spectrum. The resolution bandwidth directly determines the number of samples per spectrum, i.e. the spectral distance between two adjacent samples in the spectrum.
• Attenuation: Reduces large signals to levels that make the best use of the spectrum monitor’s dynamic range.
• VBW: Modifies the video bandwidth of the spectrum. The video bandwidth determines how many single spectrum sweeps are averaged for one single spectrum chart.
• Pre Amp: Toggles the Pre Amp On (if check-box checked) and OFF (if check-box unchecked).
• Center: The measurement center frequency.
• Span: Includes the center frequency and the upper and lower bandwidths.
• Lower bound: The lower frequency of the display.
• Upper bound: The upper frequency of the display.
• Apply: Updates the remote spectrum monitor settings accordingly.
Hold Settings (Display Panel)
• Max Hold/Rolling: The maximum power ever displayed per channel can be turned on/off. Trace is red. When 'Rolling' is selected, a rolling maximum average is displayed.
• Min Hold/Rolling: The minimum power ever displayed per channel can be turned on/off. Trace is green. When 'Rolling' is selected, a rolling minimum average is displayed.
• Average: The average power displayed per channel can be turned on/off.
• Average Count: The number of traces used to determine Average.
• Current: Turns on/off the active trace from view. Default, the box is checked.
• Update interval(s): The slider modifies the update rate of the spectrum displayed. This option becomes important if a low bandwidth connection is used and the monitoring overhead has to be minimized.
Marker Settings (Display Panel)
• Data marker: Turns data markers on/off. When the data marker is enabled, users can move their mouse across the spectrum screen. The amplitude level and frequency is displayed accordingly.
• Vertical marker: Turns vertical markers on/off. When the Vertical marker function is checked (enabled), users can hold down the <Ctrl> key while dragging the mouse over the spectrum screen. A vertical line will appear. Clicking the mouse will place a marker on screen. Unchecking the vertical marker selection will remove markers from the spectrum display. Remove the line by holding <Ctrl> key and clicking the right mouse button.
• Horizontal marker: Turns horizontal markers on/off. When the Horizontal marker function is checked (enabled), users can hold down the <Shift> key while dragging the mouse over the spectrum screen. A Horizontal line will appear. Clicking the mouse will place a marker on screen. Unchecking the Horizontal marker selection will remove markers from the spectrum display. Markers can be removed by holding <Shift> and clicking the right mouse button.
• Snapshot: Take a snapshot as a picture to save either in SpectraVision's own internal database or on to the PC/laptop being used. If saved in the database, review the snapshot in the records section.
• Measurement: Take measurements over a certain period of time and review it in the record section again. Measurements are taken for the time duration as specified by the user. The format of the file saved is *.dat. Measurements play back as a video in the SpectraVision main window.
Playback
• To review either a snapshot or measurement, click on the three horizontal lines located at the top right of the SpectraVision window. Select records. A window with then pop up allowing either snapshots or measurements (as videos) to be reviewed.
Zoom Panel Setting
Clicking the Window check box will activate the zoom window below the spectrum chart. The zoom window allows for displaying a user-defined area of the spectrum chart. The left and right edge of the window can be dragged in order to change the window width. By clicking in the window and dragging it, its position can be shifted. In Section1-9 Additional Panels, see Zoom (Spectrum Mode Only).
Spectrum Chart
• Adjust the y-axis values by placing the “hand” cursor over the Y-axis numbers and rolling the mouse wheel forward or backward to attain the desired numbering. In this way, the dB/div can be set for the amplitude axis.
• Adjust the x-axis (frequency) by placing the “hand” cursor over the x-axis numbers and rolling the mouse wheel forward or backward to attain the desired numbering. In this way, the frequency span can be adjusted.
• The measurement can be moved into view by placing the “hand” cursor in the spectrum display, hold down the left mouse button, and move the display up or down into view. Alternatively, the user can click on the visible icon to place the spectrum trace centered in the screen.