Tektronix TDS6404, Service Manual, Page: 138 / 252

Performance Tests
4- 82
TDS6000 Series Service Manual
p. Touch the Clear button.
q. Enter data into Serial Pattern Data field for the next setting in Table 4--8
that is not yet checked.
r. Touch Apply .
s.
Verify that the instrument triggers one Unit Interval (UI) after the 0 in
the input signal (see Figure 4--35). Enter pass or fail in the test record.
Table 4- 9: Word recognizer data
Serial pattern data Trigger location
2492 4924
16
One UI before the 1
4924 9249
16
At the 1
9249 2492
16
One UI after the 1
3.
Verify that the serial path and pattern matching circuits can do isolated 1s:
a. Adjust the trigger LEVEL to trigger at 75% (+1 division) on the sine
wave.
b. Touch the Clear button.
c. Enter data into the Serial Pattern Data field for one of the settings in
Table 4--9 that is not yet checked. (Start with the first setting listed.)
d. Touch Apply .
e.
Verify that the instrument triggers one Unit Interval (UI) before the 1 in
the input signal (see Figure 4--36). Enter pass or fail in the test record.
f. Touch the Clear button.
g. Enter data into the Serial Pattern Data field for the next setting in Table
4--9 that is not yet checked.
h. Touch Apply .
i. Verify that the instrument triggers at the 1 in the input signal (see Figure
4--36). Enter pass or fail in the test record.
j. Touch the Clear button.
k. Enter data into the Serial Pattern Data field for the next setting in
Table 4--9 that is not yet checked.
l. Touch Apply .