Tektronix TDS7054, Service Manual

Page: 87 / 254

TDS7104 & TDS7054 Service Manual
4- 27
Performance Tests
This section contains a collection of manual procedures for checking that the
TDS7000 Series Oscilloscopes perform as warranted.
The procedures are arranged in logical groupings such as: Signal Acquisition
System Check s , Time Base System Checks, Triggering System Checks , and
Output Ports Checks . They check all the characteristics that are designated as
checked in Specifications. (The characteristics that are checked appear with a
n
in Specifications ).
STOP
. These procedures extend the confidence level provided by the basic
procedures described on page 4--5. The basic procedures should be done first,
then these procedures performed if desired.
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 oscilloscope.
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 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 tempera-
ture as listed in Table 1--10. (The warm-up requirement is usually met in the
course of meeting the Self Tests and Functional Tests prerequisites listed
above).