Teledyne Lecroy HVD3000 Operator's Manual page 33

HVD3000 / HVD3000A High-Voltage Differential Probes
Offset
Offset allows you to remove a DC bias voltage from the differential input signal while
maintaining DC coupling. This ensures that the probe will never be overdriven while a signal
is displayed on screen and prevents inaccurate measurements.
The total usable offset of the oscilloscope and probe system is a function of the
oscilloscope V/div setting and offset at that V/div setting, and the probe attenuation and
offset at that attenuation setting. Total maximum offset may be calculated as:
Once the oscilloscope front end V/div value is known, it is possible to know the maximum
oscilloscope offset available at this V/div setting either by referencing the oscilloscope
specifications or setting the maximum offset value on the oscilloscope for that V/div
setting. Maximum offset for the probe and oscilloscope combination can then be
calculated as:
Max Positive Offset Available
Oscilloscope Positive Offset (at Oscilloscope Front End V/div) * Probe Attenuation– 10V
Max Negative Offset Available
Oscilloscope Negative Offset (at Oscilloscope Front End V/div) * Probe Attenuation + 10V
In both cases, the maximum offset available cannot exceed the following:
3102 / 3102A
3106 / 3106A
3206 / 3206A
3605 / 3605A
NOTE: The offset values reported on oscilloscope channel descriptor boxes may deviate
slightly from expected values per the formulas above. The reported probe attenuation is a
"nominal" value and can deviate slightly from the actual value measured during calibration
and stored with the probe. The actual offset value reported uses the actual "as measured"
probe attenuation value. This provides for higher DC and low frequency gain accuracy than
would otherwise be possible.
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1.800.561.8187
Oscilloscope Front End V/Div = (Probe and Oscilloscope) V/Div ÷ Probe_Attenuation
Max Positive Offset (Probe and Oscilloscope together) =
Max Negative Offset (Probe and Oscilloscope together) =
X50 X100
NA ±150V
±150V NA
±150V NA
NA NA
www.
X200 X500 X1000
NA NA ±1500V
NA ±1500V NA
NA ±1500V NA
±600V NA NA
information@itm.com
.com
X2000
NA
NA
NA
±6000V