The 8656A Synthesized Signal Generator provides frequency coverage from 100kHz to 990MHz (with underrange to 10kHz). This wide range covers the IF and LO frequencies as well as the RF frequencies of most receivers. It also allows testing in a variety of communication systems including the 800MHz FM mobile band and some telemetry bands. Frequency resolution of 100 or 250Hz allows convenient setting of increments including 6.25kHz channel spacings. "Output levels of -127 dBm to +13 dBm "Internal modulation (2 digit display): 400 and 1000Hz, AM, FM or combination "HP-IB Interface