The Aeroflex IFR‑2947A is a rugged communication service monitor that combines full‑span spectrum analysis, RF measurement, and cellular testing in a lightweight, MIL‑T‑28800 Type II compliant package. Common failure points for this class of equipment include power supply degradation (especially the 5 W RF port protection circuitry), oscillator drift affecting frequency accuracy, and connector wear on the RF ports leading to intermittent signal loss. First‑check diagnostics: verify the main AC/DC input voltage and output rails against spec; inspect all RF connectors and cables for corrosion or mechanical damage; review any stored error codes or calibration logs for indications of oscillator or power supply faults.[oss-gpt-20b]