Chapter 3
67
VEE Measurement Program Operation
Measurement
1.
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Meas. Type
Specifies the type of measurement sequence.
1)[Erase Write Meas.] means to perform DC
erase, write data then measure. 2)[Write
Meas.] means to write data, then measure. 3)
[Meas.] means to measure only.
NOTE
The parameter values of Channel Bit Rate, Write Current and Sense Current that have been
set in the [Configuration] menu will automatically update similar parameters in this menu.
3. Click the [Measure] button to start measurement. When [Auto Scale] is pressed the
graph scale will adjust itself automatically to its maximum and minimum values.
Measurement
Display
The TAA, TAA+, TAA- and TAA Asymmetry are averaged from the number of
measured revolutions set by the Average. Mod. Ratio, Mod Ratio (Pos) and Mod. Ratio
(Neg) are modulation result. The test result only for the last revolution of TAA
measurement is used to calculate the modulation. The TAA data at each revolution are
displayed on the graph.
When you click the [TAA Trace] and [TAA Asym.Trace] buttons for more detailed
information of the TAA+, TAA- and TAA Asymmetry. Refer to the
“hpe5022_taaRawData_Q” function in Chapter 3 of the programming manual.
4. Click on the [TAA Trace] button to display the results of TAA Trace.
Figure 3-24
TAA Trace Display
Measurement
Display
The upper portion of the window shows the mean, maximum, minimum and standard
deviation of the measured TAA, TAA+ and TAA- for the number of specified
revolution.
5. Click [OK] to display the TAA menu.
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