LeCroy DDA 7 Zi series, Operator'S Manual

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WavePro 700Zi
511
WP700Zi-OM-E-RevA
Probe Channel and Type Identification
This area shows the type of probe connected to the channel. All other information shown in a given row is
associated with that probe.
Full Calibration Button
This button causes the scope to automatically perform a full DC and deskew calibration. See details of probe DC
calibration or probe deskew calibration .
Probe DC Information
Shows the gain and offset applied to the probe. If the probe measures a voltage of V, the new, calibrated voltage
is:
Note that the offset is in Volts, and the gain is unitless.
The probe DC calibration information can be entered either manually or as the result of an automatic calibration.
In the case of automatic calibration, it can be part of the full calibration or it can be a standalone DC calibration
executed in
advanced mode . When the DC calibration information is a result of an automatic calibration utilizing
the TF-DSQ fixture, the information shown is the gain and offset utilized for the currently configured channel
sensitivity (volt/division setting; see details of
DC calibration ). In this case, when the channel sensitivity is altered,
you will notice that these values will change. When the DC calibration information is entered manually, it will
clear any automatic results and replace them globally with the newly entered values. This means that if
new gain and offset numbers are entered manually, these values will apply across all sensitivity settings
of the scope.
The gain is limited to between 0.8 and 1.2, but the offset is not limited.
Note: It is important to note that some passive probes, and any user-designed probes, do not provide proper
probe identification information to the scope. In these cases, the scope may not be able to determine the proper
attenuation values. In this situation, you should make sure that the proper attenuation is entered in the channel
"Vertical" setup dialog. Furthermore, the gain entered should be the gain correction applied to the system with
the correctly entered attenuation.
Probe Deskew Information
The probe deskew information contains the measured skew between the probe in the specified channel and the
reference channel. It can be entered manually or as the result of an automatic calibration. In the case of
automatic calibration, it can be the result of a portion of the
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the result of a standalone deskew calibration . Even after the deskew has been performed automatically, the
deskew correction can be tweaked manually.
Clear
All probe calibrations can be cleared by pressing this button corresponding to a probe.
Probe Calibration Source
This specifies the signal source used for DC and skew calibrations. When the TF-DSQ fixture is plugged into a
scope input, the scope will automatically specify this fixture as the calibration source.
Skew Reference
This specifies the channel or external input where the skew reference is supplied. The skew reference is the
absolute time reference to which all deskew measurements are made. When the TF-DSQ fixture is plugged into
a scope input, the scope will detect this and automatically show the front panel connection of the fixture.
Recall Calibration
Whenever a probe calibration is applied, the scope saves the information in a file on the disk. If the scope must be
rebooted for any reason, the probe calibration information is always cleared, but can be manually recalled by
pressing this button.
Advanced Mode Checkbox
When the Advanced Mode checkbox is unchecked, you have access to the basic probe calibration menu . The
basic probe calibration menu shows you only what is absolutely needed to perform a simple calibration of the