Audio Precision ATS-2, Getting Started

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during the sweep. For instance, if you choose Analyzer.Level A as the
reading in Data 1 and then check the Stereo Sweep checkbox, the reading
Analyzer.Level B will also be gathered during the sweep.
Source Range, Steps, and Spacing
During the sweep, the setting in Source 1 is stepped from the Start
value to the Stop value shown in fields below Source 1. The number of
steps in the sweep is shown in the Steps field. A radio button to the right
of these fields controls whether successive settings are separated linearly
or logarithmically. In a linear sweep, the
difference between successive
settings is constant. In a logarithmic sweep, the ratio between successive
settings is constant.
For example, if the start frequency is 20 Hz, the stop frequency is
20 kHz, there are 3 steps, and the spacing is logarithmic, ATS will first set
the generator to 20 Hz, then 200 Hz, then 2 kHz, and finally 20 kHz. That
is, the
ratio between successive frequency settings is 10.
On the other hand, if the spacing is linear, the generator is first set to
20 Hz, then 6680 Hz, then 13340 Hz, and finally 20 kHz. That is, the
difference between successive frequency settings is 6660 Hz.
Data Display Range
A graph is automatically created when a sweep is run. The Start and
Stop values for Source 1 define the extent of the horizontal ( x -) axis. The
extent of the vertical ( y -) axis is determined by the values in the Top and
Bottom fields beneath Data 1.
The units of the y -axis are the same as the units in the Top and Bottom
fields. If you change the units of the Top or Bottom field, the units in the
other field will also change. See the Units section on page 32 for more
information on units.
Quick Guide to Sweeps Chapter 5: Quick Guides
Getting Started with ATS-2 35