4 Audio Generator Functions108 Keysight U8903A User’s GuideSquare waveformA square waveform is used in applications such as power amplifier test. To selecta square waveform, press Waveform > Square.The following figure shows the square waveform menu.Figure 4-18 Square waveform menuThe square waveform may be configured with the following parameters.– Frequency– AmplitudeArbitrary waveformThe arbitrary waveform function enables you to load a digital waveform file intothe U8903A as a sequence of waveform samples, with a maximum length of32768 points. The samples are output at a fixed sampling rate of 312.5 kHz fromthe generator, in a continuous sequence. To select an arbitrary waveform, pressWaveform > Arbitrary.