Square waves are waveforms with a 50% duty cycle and no DC offset, and are characterized as rectangular-shaped waveforms. The frequency can be generated from 20 Hz to 5 kHz in 1/12 octave steps. The output level is variable from -72 dBu to +6 dBu, -74 dBV to +4 dBV. Because square waves can damage equipment if played at high levels, the VTG 400D and VTG 400DVI can be set to automatically attenuate the output level to -40 dBu whenever square wave output is selected.
Apr 13, 2011
Sine Wave
Sine waves are periodic, oscillating waveforms represented as sine curves and are elementary components of sound. The VTG 400D and VTG 400DVI generate sine waves with programmable amplitude between -72 dBu and +6 dBu, -74 dBV and +4 dBV, and frequency specified between 20 Hz and 20 kHz in 1/12 octave steps. Sine wave signals are used in testing and measuring the frequency response and distortion of audio products, as well as crosstalk between the left and right channels.
Pink Noise
Pink noise is a variant of white noise with equal energy at every octave. It is the result of passing white noise through a 3 dB per octave low pass filter.This test signal spans between 20 Hz and 20 kHz. The output level is variable from -72 dBu to -4 dBu, -74 dBV to -6 dBV.
White Noise
· White noise is a randomly generated audio signal – or noise – with equal energy at every frequency.
· This test signal spans between 20 Hz and 20 kHz. The output level is variable from -72 dBu to +6 dBu, -74 dBV to +4 dBV.
· White noise is used in audio level measurement and equipment calibration.
Audio Test Signal
This high performance, professional quality audio test generators deliver sine waves, square waves, pink noise, white noise, polarity, frequency sweeps, and sine wave bursts. The output level is adjustable and frequencies are selectable from 20 Hz up to 20 kHz in 1/12 octave increments. Additional adjustments are available for frequency sweeps and sine wave bursts.
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