Performing Pulse Power Measurements
R&S
®
Spectrum Rider FPH
216
User Manual 1321.1011.02 ─ 06.00
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9.2.1
Determining Pulse Characteristics
Selecting an algorithm for base and top power calculation
The R&S Spectrum Rider provides several methods (or algorithms) to calculate the
base and top power of a pulse.
●
"Histogram"
Calculates the top and base power of the pulse by analyzing the histogram of the
trace data. The level of the pulse top calculated by the mean value of all points rep-
resenting the pulse top. Similarly the level of the pulse base is calculated by the
points representing the pulse base.
This algorithm is recommended for analyzing most of the pulse signals
●
"Integration"
Calculates the top power of the pulse by fitting a rectangle pulse of same energy
into the pulse signal as a reference.
This algorithm is recommended for modulated pulse signals or when the pulse
energy must be taken into account, for example when you want to compare the
measurement result with that of a thermal power sensor.
●
"Peak"
Assumes that the peak power of the pulse is also the top level of the pulse.
The top and base power is also the reference point for the calculation of pulse timing
characteristics.
1. Press the [MEAS] key.
2. Select the "Algorithm" softkey.
3. Select the algorithm you prefer for your measurement.
The R&S Spectrum Rider adjusts the results accordingly.
Defining reference levels for pulse timing calculation
To calculate pulse timing parameters, like the rise and fall time of the pulse, you have
to define several reference levels. All reference levels are a percentage of the pulse
amplitude, either expressed in terms of power (Watt) or voltage (Volt).
The "Low Reference Power" and "High Reference Power" are required to calculate the
fall and rise times of the measured pulse. The "Low Reference Power" defines the
level at the start of the rising edge and the level at the end of the falling edge of the
pulse. The "High Reference Power" defines the level at end of the rising edge and the
level at the start of the falling edge.
The "Reference Power" is required to calculate the pulse width, its start time and its
stop time.
Configuring the Power vs Time Result Display
