Agilent Technologies E4406A manual Making the Waveform Time Domain Measurement, Purpose, Chapter

NOTE

Making Measurements

Making the Waveform (Time Domain) Measurement

Making the Waveform (Time Domain) Measurement

Purpose

The waveform measurement is a generic measurement for viewing the input signal waveforms in the time domain. This measurement is how the instrument performs the zero span functionality found in traditional spectrum analyzers. Also available under basic mode waveform measurements is an I/Q window, which shows the I and Q signal waveforms in parameters of voltage versus time. The advantage of having an I/Q view available while in the waveform measurement is that it allows you to view complex components of the same signal without changing settings or measurements.

The waveform measurement can be used to perform general purpose power measurements to a high degree of accuracy.

Measurement Method

The instrument makes repeated power measurements at a set frequency, similar to the way a swept-tuned spectrum analyzer makes zero span measurements. The input analog signal is converted to a digital signal, which then is processed into a representation of a waveform measurement. The measurement relies on a high rates of sampling to create an accurate representation of a time domain signal.

This measurement is available for use with both the RF input and baseband I/Q inputs. For details on Baseband I/Q operation see the section on “Using Baseband I/Q Inputs (Option B7C)” on page 151.”

Making the Measurement

The factory default parameters provide a good starting point.You may want to change some of the settings. Press Meas Setup, More (1 of 2), Restore Meas Defaults at any time to return all parameters for the current measurement to their default settings.

Press MEASURE, Waveform (Time Domain) to immediately make a waveform (time domain) measurement.

To change any of the measurement parameters from the factory default values, refer to the “Changing the Measurement Setup” section for this measurement.

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