Stanford Research Systems SR785, Руководство по эксплуатации и программированию

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4-38 Display Setup Menu
SR785 Dynamic Signal Analyzer
A User Function may not be selected as the measurement if it uses a Trace which is
empty or which contains data taken in a different Measurement Group.
See ‘User Math Functions’ in Chapter 2 for more.
View
Select the View of the active display Measurement. A View is a way of looking at
complex measurement data.
Each display has its own Measurement and each Measurement has an associated View.
Changing Measurements changes the View to the View associated with the new
Measurement. The two displays generally have different Measurements each with their
own associated Views. This entry field can be linked to the Measurement on both
displays using the [Link] key.
Command: VIEW (?) d {, i}
The following Views are available:
Log Magnitude
Log magnitude view graphs the log of the magnitude of the measurement data. The
magnitude is simply
√
(x
2
+ y
2
) where x is the real part and y is the imaginary part. The Y
axis of the display is logarithmic. If <dB Units> in the <Units> submenu are 'Off,' the Y-
axis will display a logarithmic grid. If <db Units> are 'On,' the Y-axis will have a grid
which is linear in decibels. The shape of the graph is the same in the two cases.
Linear Magnitude
Linear magnitude view graphs the magnitude of the measurement data. The magnitude is
simply
√
(x
2
+ y
2
) where x is the real part and y is the imaginary part. The Y axis of the
display is linear in scaling.
Magnitude
2
Magnitude
2
view graphs the magnitude squared of the measurement data. The magnitude
squared is simply (x
2
+ y
2
) where x is the real part and y is the imaginary part. The Y axis
of the display is linear in scaling.
Real Part
Real Part view graphs the real part of the measurement data. The Y axis of the display is
linear in scaling.
Imaginary Part
Imag Part view graphs the imaginary part of the measurement data. The Y axis of the
display is linear in scaling.
Real measurement data, such as baseband time record, have zero imaginary part. This
view is zero for all points.