gen er a tor am pli tude has not changed; the set ting is dis played in a dif fer ent
unit. You can now set the gen er a tor amplitude in Vp.
Some units, such as dBr, de pend on a ref er ence be ing set. Re fer to Ap -
pen dix A of the ATS-2 User’s Man ual for more in for ma tion.
Quick Guide to Sweeps
Most de vice test ing with ATS-2 is per formed with sweeps. In a sweep, a
set ting is stepped over a pre-de fined range, while se lected read ings are
gath ered. The re sult is a ta ble of data re lat ing the read ings to each value of
the setting.
For in stance, if you wanted to mea sure the fre quency re sponse of an an -
a log am pli fier, you might vary the fre quency of the an a log gen er a tor from
20 Hz to 20 kHz in 30 log a rith mic steps, while mon i tor ing the an a lyzer
chan nel A and chan nel B level read ings. The re sult would be a ta ble of
data with 30 rows (one for each fre quency step) and 3 col umns (one for
the fre quency set ting, one for the chan nel A level read ing, and one for the
channel B level reading).
You can force ATS-2 to perform a “single-point sweep” for
special purposes, but generally the term sweep indicates that
a number of data points are included in the measurement.
When a sweep is per formed, a graph is also cre ated. This is a graph i cal
rep re sen ta tion of the data ob tained dur ing the sweep. Fig ure 16 shows an
ex am ple of a ste reo fre quency re sponse graph.
This sec tion is an in tro duc tion to sweeps. The Sweep panel con tains
many more fea tures that are de scribed in Chap ter 15 of the ATS-2 User’s
Man ual.
Quick Guide to Sweeps Chapter 5: Quick Guides
Getting Started with ATS-2 35
Figure 16. A typical
frequency response graph.
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