CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
4-17
Performance Tests
This section contains a collection of manual procedures for checking that
instrument performs as warranted.
The procedures are arranged in logical groupings: Signal Acquisition System
Checks, Time Base System Checks, Triggering System Checks, Output Ports
Checks, Serial T rigger Checks, and Optical-to-Electrical Converter Checks.
They check all the characteristics that are designated as checked in Specifica-
tions. (The characteristics that are checked appear with a n in Specifications).
STOP. These procedures extend the confidence level pr ovided by the basic
procedures described on page 4--5. The basic procedures should be done first,
then these pr ocedures performed if desir ed.
Prerequisites
The tests in this section comprise an extensive, valid confirmation of perform-
ance and functionality when the following requirements are met:
H The cabinet must be installed on the instrument.
H You must have performed and passed the procedures under Self Tests, found
on page 4--5, and those under Functional Tests, found on page 4--6.
H A signal-path compensation must have been done within the recommended
calibration interval and at a temperature within ±5 _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).
A signal-path compensation must have been done at an ambient humidity
within 25% of the current ambient humidity and after having been at that
humidity for at least 4 hours.
H The instrument must have been last adjusted at an ambient temperature
between +20 _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 tempera-
ture as listed in Table 1--12. (The warm-up requirement is usually met in the
course of meeting the Self Tests and Functional Tests prerequisites listed
above).
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