Offset - HP 54753A User Manual

When the ohm, % reflect, or gain units are selected, the control changes to
Magnify scale . In this mode of operation, the TDR plug-in's hardware scale
behaves as it would when the units mode is selected for all stimulus except for
differential or common mode.
If the TDR/TDT stimulus is set to differential or common mode, the control also
changes to Magnify scale . However, the hardware scale is set so that the
displayed waveform is never clipped. The Magnify scale control is a software
scaling control.
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
calibrated. The offset voltage is the voltage at the center of the graticule area,
and the range of offset is 500 mV. You can use the knob, arrow keys, or keypad
to change the offset setting. The fine mode also works with offset.
When an HP 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 units the offset is displayed in depend on the unit of measure selected with
the Units softkey. The choices for units are volts, watts, amperes, ohms, %
reflect, gain, or unknown.
When the ohm, % reflect or gain units are selected, the control changes to
Magnify offset . In this mode of operation, the TDR plug-in's hardware offset
behaves as it would when the units mode is selected for all stimulus except for
differential or common mode.
If the TDR/TDT stimulus is set to differential or common mode, the control also
changes to Magnify offset , however, the harrower scale is set so that the
displayed waveform is never clipped. The Magnify offset control is a software
offset control.
Channel Offset
Key Path
Setup Channel Menu
Offset
3-5