Spectrum Analyzer Software Instruction Manual
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Instruction Manual Spectrum Analyzer Overview The Spectrum Analyzer II software simplifies the debugging of frequency-related effects, presenting a tool kit that mimics the interface of a traditional RF spectrum analyzer. You can start using the Fast Fourier Transform (FFT) with little or no concern about setting up an FFT.
Spectrum Analyzer Software Set Up Spectrum Trace This procedure explains how to use the Spectrum Analyzer software option to display a spectrum trace, an FFT of your input trace. 1. Choose Analysis > Spectrum Analyzer; the Spectrum Analyzer dialog appears. Be sure Enabled is checked so the spectrum trace is displayed. 2. To use 1 Input or a differential probe connected to a single channel (the default), touch Input1 and choose any channel, zoom, math, or memory source.
Instruction Manual 3. Position the spectrum trace in either of the following ways: Select Center Span, then enter the Center Freq. and the Freq. Span, the total range of frequencies that appear on the grid. Use the Up/Down Arrow buttons to quickly step through the frequency span. Tip: To change the frequency span in finer increments than the default 1, 2, 5 steps, check Variable. OR Select Start Stop, then enter the absolute Start Freq. and Stop Freq. of the frequency span.
Spectrum Analyzer Software 6. Choose a weighting Window to be used for the FFT. 7. Change Scale to alter the spectrum trace based on your reference signal. Enter new values for any of the following: Output units of measure: dBm dBV dBmV dBµV V rms Arms Reference Level – Lowering/raising this value moves the trace up/down on the grid. Scale – Amplitude/div. Lowering/raising this value has the effect of “zooming” in/out on the trace.
Instruction Manual Show Peaks This procedure explains how to use the Show Peaks feature. Show Peaks marks a desired number of peak amplitudes in the spectrum trace and displays their values in tabular form. Show Peaks is an automatic and continuous identification of peaks. As the range of frequencies measured changes, peak values are recalculated and markers are moved. The values tabulated are always absolute values for the marked peak. 1. Set up the spectrum trace. 2.
Spectrum Analyzer Software Circular markers appear over the trace, representing the x peak amplitude measurements. 5. Choose to Sort By amplitude or frequency on the measurements table. The table is reordered to show the marker with highest amplitude or frequency value on top. The marker number assignment does not change. 6. Optionally, reposition the trace by choosing a peak to Set Center Freq. to. Select the desired marker from the table or enter the marker number in Peak #. Touch Apply.
Instruction Manual Apply Markers This procedure explains how to apply up-to-20 markers to frequencies of interest. Unlike peak markers, these markers remain in place unless you manually re-assign them to a different frequency. However, you can associate different measurements with the markers, and values are automatically calculated and added to the tabular display. 1. Set up the spectrum trace. 2. Touch the Peaks/Markers tab; the Peaks/Markers dialog opens. 3. Select Markers. 4.
Spectrum Analyzer Software The remainder of the steps are optional. 5. Use the Marker Controls to re-assign a marker to a new frequency: Select the marker from the table or from the Marker popup menu. This is now the Active Marker, indicated by a thin, dashed cursor line, and all Marker Controls apply to this marker. To move it to the Next Peak in either direction, touch the Left/Right Arrow button.
Instruction Manual The measurements table expands or collapses depending on how many measurements you have selected. 8. To maximize the grid area, uncheck Show Table. To remove the frequency readout from the markers, uncheck Show Freq.
Spectrum Analyzer Software Display Spectrogram This procedure explains how to display a spectrogram of a spectrum trace. The spectrogram is a 2D or 3D rendering of the historical data, up-to-256 spectra displayed in a vertically stacked display. The spectrogram can be shifted/rotated on any of its two or three axes and can be generated in colorized or monochrome versions to more easily visualize high-occurrence samples. 1. Set up the spectrum trace. 2. Choose Type 2D or 3D and check View.
Instruction Manual 4. Optionally, uncheck Monochrome to colorize the spectrogram. Variations in hue correspond to the occurrence of a frequency in the spectrum. Hotter hues indicate more frequent events, cooler hues indicate less frequent events. Colorized 3D Spectrogram Monochrome 3D Spectrogram 5. Grab (touch-and-hold) any point in the spectrogram to move it.
Spectrum Analyzer Software 12 921324 Rev A