Boonton 4500B Peak Power Meter - Manual (Page 63)

Boonton 4500B RF Peak Power Analyzer
Getting Started 3-29
3.7 Practice Exercise for Statistical Power Measurements (4500B Opt 10 only)
In the following exercises you will practice adjusting settings for the Model 4500B Opt 10 RF Peak Power Analyzer
in the statistical power mode. In statistical power measurements, the instrument does not require a trigger event from
the signal to make power measurements. The signal is continuously sampled at 25 million samples per second.
Before beginning the exercise, turn the instrument power on and connect a sensor to channel 1. Press the INIT key
to initialize the instrument to a known state. Then connect the sensor to the built-in calibrator. If the sensor requires
calibration see Section 3.5 for instructions.
In the Calibrator > Set Level menu set the calibrator level to +5 dBm, cal mode to pulse and turn the output power
level on.
For more information on the statistical power measure mode definitions, see Chapter 6 – Applications.
MENU ITEM
EXERCISE
Top Level
> Measure Mode
Press > Measure Mode to cycle through the available measurement modes. On the Model 4500B
Opt 10 these are: Pulse, Modulated and Statistical. Statistical mode sets the 4500B Opt 10 for
continuous data acquisition with statistical display formats.
Select the Statistical measurement mode.
> Measurement
Toggle > Measurement from RUN to STOP. This will stop the instrument from
measuring.
>Display
Press > Display: CLEAR to clear all data and display. All readings will go to dashes (invalid).
Use this function any time old data needs to be cleared and new data captured. Now toggle the
Measure menu to RUN to start acquiring data.
As the instrument captures data a CCDF (complementary cumulative distribution function) plot
will appear on the display (Figure 3-14). This plot represents all data points captured by the
instrument. The plot shows the percentage of points that have been accumulated that are greater
than a selected power level. By definition of the CCDF, no points greater then the highest or peak
power have been accumulated, so the peak power value lies at the 0% index.