The model 3215 and 3216 standard signal generators use a synthesizer system for generating cw and FM/AM modulation signals from 100 kHz to 140 MHz. The model 3216 contains an FM stereo modulator. 2. FEATURES (1) Highly stable signals are provided since the oscillation frequency is locked to the reference frequency. (2) The output level can be set from-20,dB/* to 126 dB/i {0 dBM = 1 AtV, 50ft open circuit) in 0.1 dB steps. (3) Frequency, output level, and modulation data can be stored as a set in the internal memory, which is capable of up to 100 presettings. by a battery. {4} The frequency, output level, and modulation can be set by key operation. (5) Remote control of all front panel switches (without power switch) is possible from the 24-pin connector on the rear panel. (6) A GPIB interface (listener) is available as an option.