Tektronix 372, User Manual, Page: 183 / 364

Adjusting the Graph Display
372 User Manual
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Y Top - When the Y top is changed, the optimum number of divisions and
the Y division are calculated from the Y top and the Y bottom. The new Y top
value is further adjusted automatically depending on other values.
Y Bottom - When the Y bottom is changed, the Y top is automatically
adjusted to a value which satisfies other values. So when you change the Y
bottom, the graph moves up or down in the curve space while keeping the
size of the graph constant. When you change the Y top or Y division, the
vertical size of the graph increases or decreases, while the Y bottom reĆ
mains constant.
Log Scale
Y Division - Cannot be changed by user.
Y Top - The value for Y top is a decade unit. If a value other than a decade
is input, it will automatically be adjusted to the nearest upper or lower deĆ
cade value depending on a positive or negative Y top value.
When the parity of the Y top is changed, the parity of the Y bottom changes
also.
Y Bottom - The value for Y bottom is a decade unit. If a value other than
decade is input, it will automatically be adjusted to the nearest lower or
upper decade value depending on a positive or negative Y bottom value.
When the parity of the Y bottom is changed, the parity of the Y top changes
also.
Y Axis Range
Y division is selected from the X/Y Division popĆup menu brought up by
touching the [Y DIVISION] selector. Y top and Y bottom can be set in the
range as shown below.
H Current - When HPUI, LPUI, or HPUI&LPUI are the Y axis component,
the range is:
Linear Scale:-1.0 A to 1.0 A
Log Scale:0.01 pA to 1.0 A or -0.01 pA to -1.0 A
H Voltage - When HPUV, LPUV, or HPUV&LPUV are the Y axis compoĆ
nent, the range is:
Linear Scale:-1.0 kV to 1.0 kV
Log Scale:0.01 mV to 1.0 kV or -0.01 mV to -1.0 kV
H 1/ W - When HPUI/LPUV is the Y axis component, the range is:
Linear Scale:-1000.0 TS to 1000.0 TS
Log Scale:0.01 pS to 1000.0 TS or -0.01 pS to -1000.0 TS