Teledyne LeCroy HFP2500 - Manual (Page 21)

Operator’s Manual
922253-00 Rev A 15
Offset
The HFP2500 has true offset capability. This allows you to remove a DC bias voltage from the input
signal while maintaining DC coupling. By using probe offset rather than the Position control on the
oscilloscope, the full dynamic range of the probe remains centered around the offset level,
preventing the oscilloscope from being overdriven and causing inaccurate measurements.
Figure 2,
Dynamic Range and Offset Effects
With ±8 V dynamic range and ±12 V offset, the HFP2500 has a measurement range of ±20 V.
When the HFP2500 is used with a Teledyne LeCroy oscilloscope equipped with ProBus interface, the
probe offset is controlled with the channel OFFSET knob.
NOTE: At higher frequencies the maximum linear input voltage is reduced. Refer to Specifications
for the derating curve.
Probe offset is controlled with the channel OFFSET knob in oscilloscopes with software version 8.7.0
or higher. The current offset is displayed above the graticule for a few seconds after a change has
been made.