Tektronix audio generators offer potent solutions for audio testing. The two-channel ASG 100 and four-channel ASG 140 combine compact size, ease-of-use and programmability. Operated manually or automatically, they produce signals used for aligning, servicing and testing of audio facilities. Test signal capability starts with simple line up, polarity, and level signals. Added to these are tone sweeps for checking distortion, frequency response and crosstalk. Industry standard CCITT 0.33 signals and newly developed Multitone signals support advanced audio analysis capability found in the VM 700A. Digital synthesis of signals ensures signal stability and repeatability. The ASG 100/140 are operated by simple front-panel controls. Alternately, users may operate these generators via their rearpanel RS-232 remote control port. Supporting a variety of baud rates, this interface permits seamless integration of audio signal generators in ATE test schemes. A wide variety of editing schemes permits user-defined values to be stored for later reuse.