Trace Menu (Spectrogram View) - Anritsu Field Master MS2070A Measurement Manual

Spectrum Analyzer Measurements

TRACE Menu (Spectrogram View)

When the combined Spectrogram view is selected (MEASURE > VIEW > Spectrogram), the TRACE and
SETUP menus are updated with spectrogram and cursor setup controls.
Spectrum Analyzer MG
TYPE: Selects one of the following types of traces:
• Clear/Write: Clears the trace after each sweep is complete and writes a new trace.
• Average: The exponential average of all N traces, where N is the AVERAGES
number set below. The number of sweeps is displayed in the status panel TRACES
table.
• Max Hold: Represents the maximum value since sweeping began. The number of
sweeps is displayed in the status panel TRACES table.
• Min Hold: Represents the minimum value since sweeping began. The number of
sweeps is displayed in the status panel TRACES table.
• Rolling Average: Is the rolling average of the last N traces, where N is the
AVERAGES number set below. The number of sweeps is displayed in the status
panel TRACES table.
• Rolling Max Hold: Is the maximum rolling average value of the last N traces,
where N is the AVERAGES number set below. The number of sweeps is displayed
in the status panel TRACES table.
• Rolling Min Hold: Is the minimum value of the last N traces, where N is the
AVERAGES number set below. The number of sweeps is displayed in the status
panel TRACES table.
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
Detector Types" on page
• 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 average amplitude of sampled data for each display point.
When VBW/AVERAGE type is set to Log, this method shows the traditional
average of log (power), such as dBm, for each display point.
• 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: Normal detector type also referred to as Rosenfell, shows the random
noise than positive peak and avoids the missed-signal problem of the Sample
Mode. Should the signal both rise and fall within the bucket interval, then the
algorithm classifies the signal as noise. An odd-numbered data point displays the
maximum value encountered during its bucket. An even-numbered data point
displays the minimum value encountered during its bucket. If the signal is NOT
classified as noise (does NOT rise and fall) then Normal is equivalent to positive
peak.
PN: 10580-00447 Rev. E
3-23).
3-7 Setting Trace Parameters
"Trace
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