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Introduction
Have you ever wondered what happens to the signal of your device once it enters your signal analyzer? If you haven’t, you should. Understanding how your signal is manipulated by your signal analyzer helps you make accurate measurements. Not paying attention to the effects of your analyzer can lead to mistakes and false measurements. This paper will walk you through the high-level design of a signal analyzer and how you can use that knowledge to avoid mistakes and make optimum measurements.
The Signal Enters the Signal Analyzer
When you connect a device under test (DUT) to your signal analyzer’s inputs, your signal passes through an RF input attenuator and a pre-amp. These components are used to scale your signal to levels that the rest of the signal analyzer’s components can accept. Additionally, the RF input attenuator and pre-amp give you control over the scale of your signal on the signal analyzer’s display. As you scale your signal, keep in mind that your attenuator setting can help you optimize the signal-to-noise ratio (SNR).
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