Table 4- 8: Serial Pattern Data - Tektronix TDS6604 Service Manual

Performance Tests
4- 80

Table 4- 8: Serial pattern data

Serial pattern data
DB6D B6DB
16
B6DB 6DB6
16
6DB6 DB6D
16
2. Verify that the signal path can do isolated 0 and pattern matching circuits
can do isolated 1:
a. From the button bar, touch Cursors and then the Setup button.
b. Set the Tracking Mode to Tracking.
c. Touch the Close button.
d. Adjust the cursors until the ∆t readout equals 800 ps (one unit interval).
Center the cursors around the center graticule line (see Figure 4- -35).
e. From the button bar, touch Trig and select the A Event tab.
f. Touch the Serial Trigger Type button and then set the Standard to
GB Ethernet.
g. Touch the Editor button.
h. Set the Format to Hex and then touch the Clear button.
i. Enter data into the Serial Pattern Data field for one of the settings in
Table 4- -8 that is not yet checked. (Start with the first setting listed.)
Touch Apply.
j.
k. Verify that the instrument triggers one Unit Interval (UI, one baud
divided by the bit period) before the 0 in the input signal (see Figure
4- -35). Enter pass or fail in the test record.
l. Touch the Clear button.
m. Enter data into Serial Pattern Data field for the next setting in Table 4- -8
that is not yet checked.
n. Touch Apply.
o. Verify that the instrument triggers at the 0 in the input signal (see
Figure 4- -35). Enter pass or fail in the test record.
Trigger location
One UI before the 0
At the 0
One UI after the 0
TDS6000 Series Service Manual