TDS5000B Series Service Manual
5-1
Calibration Procedure
This chapter describes a sample automatic calibration procedure for your
oscilloscope. The purpose of this procedure is to make internal configuration
adjustments in the oscilloscope to help ensure its accuracy.
The voltage and timing references inside the oscilloscope are very stable
over time and should not need routine calibration/adjustment. Before performing
the procedures in this chapter, first verify that the oscilloscope does not meet
specifications. Refer to Performance Tests for a procedure to verify the specifica-
tions. These tests are part of the TDS5000B Series Digital Phosphor Oscillo-
scopes Specifications and Performance Verification Technical Reference PDF,
available on the TDS5000B Series Product Software CD-ROM (Tektronix part
number 063-3692-xx).
If periodic calibration is one of your requirements, a general rule is to verify
performance and perform calibration (only if needed) every 2000 hours of
operation or once a year if the oscilloscope is used infrequently.
The oscilloscope must be calibrated in a 20 °Cto30°C ambient temperature
environment. The oscilloscope and signal source must warm up at least
20 minutes in this environment before you begin the calibration procedure.
Some calibration tests may be dependent upon others. The automatic calibration
procedure performs the tests in an appropriate sequence to eliminate dependency
problems. Always execute the complete automatic calibration procedure. The
total time to execute the procedure is approximately 45 minutes (depending
somewhat on the processor speed of the controller and the type of GPIB
controller — USB is much slower).
After removal and replacement of a module due to electrical failure, you may
need to perform the calibration procedure, depending on the module replaced.
See Table 5 --1.
Table 5- 1: Calibration required for module
replaced
Module replaced Calibration required
Front panel assembly No
Acquisition board Yes
Processor board Yes
Calibration Interval
Calibration Environment
Calibration Dependencies
Calibration Aft er Repair
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