Tektronix 2213, Инструкция по эксплуатации

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Adjustment Procedure—2213 Service
e. Set the X I 0 Magnifier o ff (knob in).
g. ADJUST—5 ns Linearity (C734) fo r one time marker
every 2 divisions over the center 8 divisions o f the mag­
nified sweep. Adjust the Horizontal POSITION control to
f. CHECK—There is no discernable shift in the time
marker when switching between X I 0 Magnifier on and X I 0
Magnifier o ff.
check the linearity to the 15th time marker.
h. Repeat parts e through g u ntil no further improve­
ment is noted.
g. Turn the X10 Magnifier on (knob out) and repeat
parts b through e until no further improvement is noted.
i. Set the X I 0 Magnifier o ff (knob in) and recenter the
trace using the Horizontal POSITION control.
3. Adjust
5-jus
Timing (C626)
a. Set the SEC/DIV switch to 5 jus.
j. Repeat parts b through i u ntil no further improve­
ment is noted.
b. Select 5-jus time markers from the time-mark
generator.
5. Check Timing Accuracy
a. Select 50-ns tim e markers from the time-mark
generator.
c. A D JU S T -5 jus Timing (C626) fo r 1 time marker per
division across the graticule area.
b. Use the Channel 1 POSITION control to center the
trace vertically. Adjust the TRIGGER LEVEL control
fo r a stable, triggered display.
4. Adjust High-Speed Timing (C754, C774, C784,
and C734)
a. Set the SEC/DIV switch to 0.05 jus.
c. Use the Horizontal POSITION control to align the
firs t time marker th at is 50 ns beyond the start o f the
sweep w ith the 2nd vertical graticule line.
b. Select 50-ns tim e markers from the time-mark
generator.
NOTE
When making tim ing measurements, use as a reference
the same p o in t on each time marker.
c. ADJUST—50 ns Linearity (C754) fo r equally spaced
time markers at the start o f the sweep.
d. CHECK—Timing accuracy is w ith in the lim its shown
in Table 5-6 fo r the applicable position o f the X10 Mag­
nifier. When making the check w ith the X10 Magnifier On,
d. Set the X10 Magnifier on (knob out) and select 10-ns
tim e markers from the time-mark generator.
exclude any portion o f the sweep past the 100th magnified
division.
NOTE
Table 5-6
Timing Accuracy
In the next part, keep the adjustment screws fo r
C774 and C784 as close to the same length as possible.
X10 Magnifier Accuracy at 10th Vertical Graticule Line
e. ADJUST—5 ns Timing (C774 and C784) alternately
fo r one tim e marker every 2 divisions over the center 8
divisions o f the magnified sweep.
O ff (knob in) 3% (0.24 division)
On (knob out) 5% (0.40 division)
f. Adjust the Horizontal POSITION control so that the
5th time marker is aligned w ith the 2nd vertical graticule
line.
e. Repeat parts b through d fo r the SEC/DIV and time-
mark generator setting combinations shown in Table 5-7
under the "N o rm al" column.
5-14
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