Teledyne LeCroy CP150 - Manual (Page 11)

Instruction Manual
922175-00 Rev A 5
Operation with a Teledyne LeCroy Oscilloscope
The probe can be controlled through the Vertical Setup dialog for the channel to which the probe is
connected.
Turning the VOLTS/DIV knob will control the oscilloscope’s scale factor to give full dynamic range from
20 mA/div to 50 A/div.
The CP150 probe dialog (a tab behind the channel setup dialog) allows for the selection of the probe’s
coupling (DC, Grounded or AC), AUTO ZERO, DEGAUSS PROBE and Probe BWL functions, limiting the
system bandwidth to 20 MHz or maximum bandwidth (BWL Off).
Auto Zero
The CP150 incorporates an Auto Zero function to remove the DC offset from the current probe. Auto
Zero must be invoked by the user. After several minutes of warm-up, or when the probe is exposed to a
large shift in ambient temperature, some DC offset drift may occur. To initiate an Auto Zero cycle, touch
the CP150 tab of the (Channel) Vertical Setup dialog, then touch AUTO ZERO.
Degauss Probe
If the probe has been magnetized by external magnetic field or by excessive input, the core can be
demagnetized by opening the CP150 dialog and touching DEGAUSS PROBE. The demagnetizing process
takes about 1 seconds and should always be performed before taking a measurement.
Without clamping the probe around a conductor, slide the opening lever to close and lock the probe.
An Auto Zero is automatically performed as part of the degauss cycle.