Description

Bc” = decibels relative to the carrier. –150 dBc indicates virtually no measurable intermodulation or harmonic distortion. Such purity is necessary in: Two-tone intermodulation testing of ultra-linear amplifiers. Low-phase-noise oscillator measurements. Precision RF metrology, where load-generated distortion must not mask DUT performance. For comparison: Standard RF dummy loads: –110 to –120 dBc. Precision “low-IMD” terminations: –130 to –150 dBc. –150 dBc is state-of-the-art.