Tektronix 410, Service Manual

Page: 82 / 275

TDS 410, 420 & TDS 460 Service Manual (Company Confidential Final Draft)
4Ć13
Performance Tests
This subsection contains a collection of procedures for checking that the
TDS 400 Digitizing Oscilloscopes perform as warranted.
The procedures are arranged in four logical groupings: Signal Acquisition
System Checks, Time Base System Checks, Triggering System Checks, and
O
utput Ports Checks. They check all the characteristics that are designated
as checked in Section 1, Specification. (The characteristics that are checked
appear in boldface type under Warranted Characteristics in Section 1.) You
can use form at the end of this section as a test record.
These procedures
extend the confidence level provided by the basic
procedures described on page 4-1. The basic procedures should be
done first, then these procedures performed if desired.
Prerequisites
The tests in this subsection comprise an extensive, valid confirmation of
performance and functionality when the following requirements are met:
H
The cabinet must be installed on the digitizing oscilloscope.
H
You must have performed and passed the procedures under Self Tests,
found on page 4-4, and those under Functional Tests, found on page 4-6.
H
A signal-path compensation
must have been done within the recom-
mended calibration interval and at a temperature within
_
C of the
present operating temperature. (If at the time you did the prerequisite Self
Tests, the temperature was within the limits just stated, consider this
prerequisite met.)
H
The digitizing oscilloscope must have been last adjusted at an ambient
temperature b20
_
C and +30
_
C, must have been operating for
a warm-up period of at least 20 minutes, and must be operating at an
ambient temperature between 0
_
C and +50
_
C. (The warm-up require-
ment is usually met in the course of meeting the first prerequisite listed
above.)
Related Information
—Read General Instructions and Conventions that
start on page 4-1. Also, if you are not familiar with operating this digitizing
oscilloscope, read
General Operating Instructions in Section 2 of this service
manual before doing any of these procedures.
Equipment Required
These procedures use external, traceable signal sources to directly check
warranted characteristics. The required equipment list follows this introduc-
tion.