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AM700 Audio Measurement Set Service Manual
Table 1–21: Generator signals
Capabilities Description
Generated signals
Sine A single sine-wave tone with variable amplitude and frequency. The
amplitude or frequency or both may be swept or stepped to provide a wide
range of sinusoidal test signals.
Tone Burst A sine-wave burst tone with variable amplitude, frequency, burst width, and
burst period
Width 10 to 100000 cycles, resolution 1
Period 64 to 100064 cycles, resolution 1
The generator converts the width time parameter into the nearest number
of cycles of sine wave to generate.
SMPTE/DIN type IMD A two-tone intermodulation signal with one tone variable in frequency
Amplitude Ratio 0.01 to 8
Variable Frequency 3 kHz to 18 kHz, resolution 0.1
Fixed Frequency 40 Hz and 500 Hz
With appropriate parameter choices this signal can be used in a SMPTE or
DIN intermodulation distortion test.
CCIF type IMD A two-tone intermodulation signal. Both tones are typically swept in tandem
with a constant frequency separation.
Amplitude Ratio 0.01, 100
Center Frequency 2.5 kHz, 19 kHz
Frequency Spacing 80 Hz, 1000 Hz
With appropriate parameter choices this signal can be used in a CCIF
intermodulation distortion test.
Shaped Noise A periodic pseudo-random noise signal with a specified spectral distribution
The available colors of the noise are white and pink.
Chirp A periodic sine sweep with a flat spectral distribution (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 resembles 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 harmonic 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.