Spectrum Analyzer Measurements 3-7 Setting Trace Parameters
Spectrum Analyzer MG PN: 10580-00447 Rev. H 3-25
DETECTOR TYPE: Selects one of the available detector types. Several detection
methods tailor the function of the instrument to meet specific measurement requirements.
There are often more measurement points across the screen than display points. The
various detection methods are different ways of showing each display point (see “Trace
Detector Types” on page 3-26).
• Peak: Shows the maximum amplitude of sampled data for each display point,
assuring that a narrow peak is not missed.
•RMS/Avg: In the default case, when the VBW/AVERAGE type is set to Linear, this
method shows the linear average amplitude of sampled data for each display point,
before converting to display units. When VBW/AVERAGE type is set to Log, this
method shows the traditional average of log (power), such as dBm for each display
point, before converting to display units. Not available in zero span.
• Negative: Shows the minimum amplitude of sampled data for each display point.
This method is also useful when measuring modulated signals to see if some
frequencies are not being used.
• Sample: Shows the transient amplitude of the center of sampled data for each
display point. This method is useful when measuring low-level signals and noise
measurements. Only available in zero span and RSSI measurements. When
Sample detector is selected, all traces must use sample detection.
• Normal: Shows random noise and signal data depending on the nature of the
sampled data. If the signal both rises and falls during the sampling interval (random
noise), then odd-numbered sampling intervals display the maximum value and
even-numbered sampling intervals display the minimum value. Odd-numbered
sampling intervals will display the peak value of the previous even-numbered
sampling interval when the peak there is higher. If the signal only rises or only falls
during the sampling interval (signal), then only the peak value is displayed, and
Normal detection is then equivalent to Peak detection.
NORMALIZE: Toggles the trace normalization on/off. Note that when the toggle is turned
on selected trace in the status panel is indicated by a subscript of the letter ‘N’. Refer to
Figure 3-14, “Trace Normalization”.
CLEAR: Clears the currently active trace data.
AVERAGES: Sets the number of trace sweeps (N) to average. Available when the trace
type is set to one of the averaging modes.
PRESET DETECTORS: Sets all trace detectors to Peak.
PRESET TRACES: Presets cursor and trace setup to Clear/Write, Active, with Peak
Detector.
RECORD: Opens the “TRACE RECORD Menu” on page 3-35.
PLAYBACK: Opens the “TRACE PLAYBACK Menu” on page 3-36.
CSV LOGGING: Opens the “TRACE CSV LOGGING Menu” on page 3-37.
Figure 3-15. TRACE Menu (2 of 2)
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