Chapter 7 7-3
Programming Examples
Measurement Process
Measurement Process
This section explains how to organize instrument commands into a measurement
sequence. A typical measurement sequence consists of the following steps:
1. setting up the instrument
2. calibrating the test setup
3. connecting the device under test
4. taking the measurement data
5. post-processing the measurement data
6. transferring the measurement data
Step 1. Setting Up the Instrument
Define the measurement by setting all of the basic measurement parameters. These
include:
• the sweep type
• the frequency span
• the sweep time
• the number of points (in the data trace)
• the RF power level
• the type of measurement
• the IF averaging
• the IF bandwidth
You can quickly set up an entire instrument state, using the save/recall registers and the
learn string. The learn string is a summary of the instrument state compacted into a
string that the computer reads and retransmits to the analyzer. See “Example 5A: Using
the Learn String” on page 7-79.
Step 2. Calibrating the Test Setup
After you have defined an instrument state, you should perform a measurement
calibration. Although it is not required, a measurement calibration improves the accuracy
of your measurement data.
The following list describes several methods to calibrate the analyzer:
• Stop the program and perform a calibration from the analyzer's front panel.
• Use the computer to guide you through the calibration, as discussed in “Measurement
Calibration Examples” on page 7-23.
• Transfer the calibration data from a previous calibration back into the analyzer, as
discussed in “Example 5C: Saving and Restoring the Analyzer Instrument State” on
page 7-84.
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