Tektronix TSG 95, Service Manual

Page: 99 / 140

Performance Verification and Adjustment Procedures
TSG 95 Service Manual
4–25
c. View Ch. A line 21 on the VM700A.
d. Press the following VM700A keys: Measure, <Level Meter>, Menu,
<Measure Position>, and <Pos. (a)>.
e. Use the VM700A front-panel knob to position the “a” cursor on the col-
or back porch. See Figure 4–10.
Cursor b
Cursor a
Figure 4–10: VM700A Level Meter Screen
f. Press the <Pos. (b)> key, and position the “b” cursor on top of the white
bar. See Figure 4–10.
g. Press the Average key.
h. ADJUST — R52 for Level (b–a) = 700 mV
±
2 mV.
i. Press the <DC Cpl. ABS. Meas> and <Pos. (b)> keys.
j. Position the cursor on the back porch.