Performance Tests
4-52
TDS7104 & TDS7054 Service Manual
l. Add the first CH 1 to CH 3 skew measurement to the second CH 1 to
CH 3 skew measurement and divide the result by 2. Use Table 4--8.
m. Add the first CH 1 to CH 4 skew measurement to the second CH 1 to
CH 4 skew measurement and divide the result by 2. Use Table 4--8.
n. Check against limits: CHECK that the largest of the three results from
steps k, l,andm is between --50 ps and + 50 ps.
o. Enter the time on the test record.
Table 4- 8: Delay between channels worksheet
Coupling
First
measurement
Second
measurement
Add first and
second
measurements
Divide sum
by 2
CH1toCH2
skew
CH1toCH3
skew
CH1toCH4
skew
3. Disconnect the hookup: Disconnect the cable from the generator output at
the input connectors of the channels.
Equipment
required
One leveled sine-wave generator (Item 12)
One 50 Ω, precision coaxial cable (Item 4)
One 2X attenuator (item 25)
Prerequisites See page 4--27
Check C hannel Isolation
(Crosstalk)