OVERVIEW: Communications monitors are electronic support systems designed to detect, intercept, and analyze communication signals for intelligence gathering, threat warning, and operational awareness. These systems have evolved significantly, incorporating wideband digital receivers and signal processing from the 1970s to the 2020s.

GENERAL DESCRIPTION: Communications monitors are part of broader COMINT/ESM frameworks and passively collect radiofrequency (RF) emissions across tactical and strategic bands. They are used to identify voice, data, and control signals transmitted by enemy or neutral forces. Early analog systems focused on narrowband VHF/UHF communications, while modern digital variants cover broader spectrum, including satellite and burst transmissions. Integrated with direction-finding (DF) and signal classification tools, they can cue jammers, EW systems, or intelligence processing suites. Platforms include ground vehicles, fixed stations, aircraft, UAVs, and maritime assets.

ROLE SUMMARY:
Category: Electronic Support Measures (ESM) / Communications Intelligence (COMINT)
Primary Use: Monitoring and analysis of RF communication emissions
Function: Passive collection and characterization of radio signals
Platform: Deployed on ground stations, naval vessels, ISR aircraft, UAVs, and EW vehicles
Integration: Often works with DF systems, EOB databases, and tactical EW/ECM frameworks

See Specific information under [Sensors/EW] section.

SOURCE:
Thales, Rohde & Schwarz, and L3Harris Monitoring System Datasheets
https://en.wikipedia.org/wiki/Signals_intelligence