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Then More.
Then
Then
Band/Interval Power Marker
A Band/Interval Power marker, unique to SA Mode, accumulates the power that
is measured over several adjacent data points (or „buckets‟). The range of buckets
being measured is displayed with vertical posts around the marker. This Band
Span value is selectable.
This feature is very similar to a channel power measurement (page 86).
When the frequency span is set to Zero span, the marker is referred to as an
Interval marker because it averages power over a specific time interval. In this
case the range is specified as the Interval Span. Learn more about Zero span
measurements on page 75.
If the Detection method and Averaging type are set to Auto when you enable a
Band/Interval Power marker, the Detection method will change to Average
(RMS) and Averaging type will change to Power average. Other Detection
methods or Averaging type settings will usually cause measurement inaccuracy.
Learn more about Detection method on page 80, and Averaging Type on page 79.
Summary:
In Zero span, an Interval Power Marker yields the average power over the
In non-Zero span, a Band Power Marker yields the total power over the
How to measure Band/Interval Power with a marker
Press Marker to create or select a Normal or Delta marker to use to measure
Then press
Then
Then
Then
Then choose from the following:
SA (Spectrum Analyzer) Mode
Marker Function
Noise ON
OFF.
specified time interval.
specified frequency range.
Band/Interval Power.
More
Marker Function
Band/Int Power
Band (or Interval) Span
Measures power over 5% of the displayed span, or ½ graticules. The
Auto
o
Band Span is automatically updated to remain at 5% when you change the
frequency span.
Enter a frequency or time value using the ▲|▼ arrows or the rotary
Man
o
knob, then press Enter. Or enter a value using the numeric keypad and
select a frequency or time suffix. The Band Span remains at the frequency or
time value that you set as the span changes.
83
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