The Agilent 11715A Am/FM test source provides very flat, wide-bandwith, and low distortion amplitude- or frequency-modulated RF signals. Designed primarily for performance tests and adjustments of the HP 8901A/B modulation analyzer and HP 8902A measuring receiver. It will aslo serve as a high-quallity modulated test oscillator where its frequency ranges apply. Typical frequency range of 330 to 470 MHz at the FM output.