Agilent Technologies 83482A, User Manual, Page: 30 / 88

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Channel Setup Menu
Scale
Scale
The Scale softkey controls the vertical scaling of the waveform. If the fine
mode is off, then the knob and arrow keys change the vertical scaling in a
1-2-5 sequence. When fine mode is on, the knob and arrow keys change the
vertical scaling in 1 mV increments. You can also use the keypad to enter val-
ues in 1 mV increments, independent of the fine mode selection.
The units the scale is displayed in depend on the unit of measure selected
with the Units softkey. The choices for units are volts or watts. (Amperes, or
unknown are available on electrical channels only.)
Key Path
Channel, Scale
Offset
The Offset softkey moves the waveform vertically. It is similar to the position
control on analog oscilloscopes. The advantage of digital offset is that it is cali-
brated. The offset voltage for electrical channels is the voltage at the center of
the graticule area, and the range of offset is ±12 times the full resolution chan-
nel scale. For optical channels, the offset wattage is the wattage two graticule
divisions above the bottom of the screen. This is set because, unlike voltage
displays, "negative" power levels do not exist but the zero power level can be
viewed clearly when the offset is set to zero watts. You can use the knob,
arrow keys, or keypad to change the offset setting. The fine mode also works
with offset.
When an Agilent 54700-series active probe is used with the plug-in module
and is connected to the probe power connector adjacent to the channel input,
the offset control adjusts the external scale factor and offset of the hybrid
inside the active probe. A probe connected to the auxiliary power connector
adjacent to the trigger input will function, but the channel scale factor will not
be adjusted automatically.
The optical channel displays the value in watts and the electrical channel dis-
plays the value in volts.
Key Path
Channel, Offset