Fluke 9640A Series, Instruction Manual

Page: 65 / 324

Local Operation
Screen Controls and Indicators
3
3-17
Offset Soft Key
The Offset key allows the operator to adjust the Instrument output via an offset from the
main setting. The soft label tracks the focus field, allowing control of either
Frequency
Offset
or
Level Offset
.
For example, assuming
Level
to be the current focus field, pressing the
Offset
soft key
will add and select the
Level Offset
field as the new focus field. In the following
Leveled
Sine
screen, a new indicator appears on the Status Bar indicating that
Offset
is on.
ead02f.bmp
Leveled Sine – No Offset
This new
Offset
field supports
Cursor
or
Numeric edit
and its value will be added to the
current output to give a new output level. See the following
Leveled Sine
– Offset
Applied screen. The display indicates the current output level and the offset value that
achieves it.
ead03f.bmp
Leveled Sine – Offset Applied
Note that editing the main
Level
field with
Level Offset
enabled causes the current
Offset
value to reset to zero. In addition, pressing the
Offset Disable
soft key clears the
Level Offset
field and its related status bar indicator and soft labels.