Tektronix TDSDDM1, User Manual, Page: 59 / 102

Measurement Descriptions
TDSDDM1 Disk Drive Measurement Application User Manual
3–17
Where: N is the number of positive or negative pulses
V
p
is the peak (positive or negative) voltage
The application measures enough peak/trough pairs to provide a good statistical
average.
From the Disk Drive Measurement Application menu, follow these steps:
1. Select the TAA+ or TAA– measurement by pressing Measure (main)
➞
TAA+ (side) or TAA– (side).
2. If you want to change trigger settings or localize the measurement, do so
now. The application defaults to the settings specified in the Trigger menu.
For further information, see Setting Up the Application Trigger on page 1–8,
Measuring Over a Range of Sectors on page 3–6, and Cursor Gating on
page 3–7.
3. Press Control (main)
➞
Start (side) to start the measurement.
4. Wait for the measurement to complete, then view the results.
The application performs the measurement according to the same algorithm used
in the TAA measurement, described on page 3–13, with the exception that only
positive pulses are measured for TAA+ and only negative pulses are measured
for TAA–.
Peak
Trough
TAA
TAA–
TAA+
OV
Figure 3–11: TAA+ and TAA– measurements
Procedure
Test Methodology