Spectrum Analyzer FAQs

01. Can I use a spectrum analyzer as a network analyzer?

Yes, there are two ways to use a spectrum analyzer as a network analyzer, but both methods can only perform scalar measurements

. Method 1: Use the built-in tracking signal source of the spectrum analyzer. Most Agilent spectrum analyzers can be equipped with this option. If you want to measure the reflection
coefficient, you will also need a directional coupler to collect the reflected power.

Method 2: Use a separate source. A coupler can be used if necessary. The prerequisite is that the sweep speed of the spectrum analyzer must be faster than the sweep speed of the signal source. However ,
this method is generally not recommended because it is less accurate.

For calibration, the method that can be used is the normalization method. This method removes the frequency response of the receiver and the source. However, vector network
analyzers use more powerful error calibration technology and can also eliminate the effects of mismatch and intermodulation. This means that, in general,
network analyzers can make more accurate measurements compared to spectrum analyzer methods.