Which type of signal is NOT mentioned as a type the operator needs to test with the Spectrum Analyzer?

The focus of the question is on identifying a type of signal that is not specified for testing with a Spectrum Analyzer as per the operational guidelines. The correct answer is indicated as AM (Amplitude Modulation), which is not typically categorized alongside the modern signal types such as GPS (Global Positioning System), SATCOM (Satellite Communications), and IF (Intermediate Frequency) that are frequently analyzed in contemporary communications systems.

AM signals, while significant in the history of communication systems, are less relevant in the context where the operator is likely to prioritize advanced and high-frequency technologies. In contrast, the other types mentioned are crucial for various current communication functions.

GPS signals are essential for navigation and positioning, SATCOM is vital for secure and reliable communication links, and IF signals serve as an intermediary frequency that simplifies the reception and processing of signals. Each of these plays a critical role in defense and military communications, illustrating the need for operators to test and verify their integrity with a Spectrum Analyzer.

Thus, AM stands apart, largely due to its less frequent application in the stated operational areas, making it less of a priority for testing in this specific context.