LeCroy LC564DL, Service Manual

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Performance Verification 5-1
5. Performance Verification
5.1 Introduction
This chapter contains procedures suitable for determining if the LC564DL Digital
Storage Oscilloscope performs correctly and as warranted.
They check all the characteristics listed in subsection 5.1.1.
Because they require time and suitable test equipment, you may not need to
perform all of these procedures, depending on what you want to accomplish.
In the absence of the computer automated calibration system based on LeCroy
Calibration Software (LeCalsoft), this manual performance verification procedure
can be followed to establish a traceable calibration.
It is the calibrating entities’ responsibility to ensure that all laboratory standards
used to perform this procedure are operating within their specifications and
traceable to required standards if a traceable calibration certificate is to be issued
for the LC564DL Digital Storage Oscilloscope.
5.1.1 List of Tested Characteristics
This subsection lists the characteristics that are tested in terms of quantifiable
performance limits.
•
Input Impedance
•
Leakage Current
•
Peak to Peak and RMS Average noise level
•
Positive and Negative DC linearity
•
Positive and Negative Offset
•
Bandwidth
•
Trigger Level
•
Smart Trigger
•
Time Base Accuracy
•
Rise Time
5.1.2 Calibration Cycle
The LC564DL Digital Storage Oscilloscope requires periodic verification of
performance. Under normal use (2,000 hours of use per year) and environmental
conditions, this instrument should be calibrated once a year.