User manual

Appendix A: Specifications
A-38
AM700 Audio Measurement Set User Manual
Table A-20: Generator Signals (Cont.)
Capabilities Description
Generated Signals
Chirp A periodic sine sweep with a flat spectral distribu-
tion (equal energy per Hz of bandwidth). The
chirp may optionally be restricted in bandwidth,
with parameters for the lower and upper band
edges.
Polarity An IEC-type polarity test signal. The signal re-
sembles a half-wave rectified sine wave with the
negative values removed.
Tek Polarity A Tektronix ASG100-style polarity test signal. The
signal consists of a sine wave and its second har-
monic added together.
Arbitrary Waveform A user-defined waveform of up to 176,384
samples is repeatedly played. The waveform is
provided by the user in a file loaded from a DOS
formatted 1.44 Mbyte diskette.
Multitone A multitone test signal with variable amplitude.
This signal consists of multiple simultaneously
generated sine waves. The multitone may be
specified in either of two ways: file mode or list
mode.
File Mode: A user-provided file contains the
description (frequency and amplitude) of each
tone included in the multitone signal and the
buffer size to use for the fft-based generation of
the multitone. Up to 128 tones may be generated,
in buffer sizes from 512 to 8192 bytes.
List Mode: The multitone is generated using the
same frequencies and amplitudes as used when
making sweeps in list mode. The built-in list editor
may be used to enter this information. The buffer
size is fixed at 1024.
Jittered Sine This is a jittered sine wave with user-controlled
jitter frequency and amplitude.