Spectrum analyzer is mainly used to connect the EMI test antenna, current probe, LISN and other test accessories to test RF interference on electronic products, after the completion of the test you can get the full-frequency frequency - level curves, so that electronic product. Spectrum analyzer is mainly used to connect the EMI test antenna, current probe, LISN and other test accessories to test RF interference on electronic products, after the completion of the test you can get the full-frequency frequency - level curves, so that electronic product. A spectrum analyzer turns that challenge into clarity by showing exactly how signal power is distributed across frequencies. From detecting hidden sources of noise to verifying device performance against industry standards, this instrument is one of the most versatile tools in an engineer's lab. It detects signals in a selected spectrum range and represents them in a graphical display as magnitude vs. Most spectrum analyzers automate certain power versus frequency type measurements, like AM modulation depth or. Spectrum analyzers and power meters are the two most fundamental tools used by RF engineers and operators to understand what is actually happening in a system. They are used to measure and analyze the electromagnetic emissions of electronic devices, ensuring that these devices comply with regulatory standards and do not cause harmful interference. Any of these can be built out based on features and performance you need.