Check Position Range; Check Variable Range; Check X Gain - Tektronix 2205 Service Manual

i. CHECK—Timing accuracy is within 4% (0.32
division at the tenth vertical graticule line), and
linearity is within 7% (0.14 division over any 2 of the
center 8 divisions). Exclude any portion of the
sweep past the 50th magnified division.
j. Repeat parts h and i for the remaining
SEC/DIV and tim e-m ark generator setting combi­
nations shown in Table 4-3 under the " X10 Mag­
nified" column.
Table 4-3
Settings fo r Timing Accuracy Checks
SEC/DIV
Tim e-M ark Generator Setting
Switch
Setting XI Normal
0.1 jxs 0.1 jxs
0.2 p.s 0.2 ns
0.5 p.s
0.5 ns
1 1 ns
J1S
2 ns 2 ns
5 jxs
5 ns
10 jis 10 ns
20 fxs 20 ns
so ns
50 ns
0.1 ms 0.1 ms
0.2 ms 0.2 ms
0.5 ms
0.5 ms
1 ms 1 ms
2 ms 2 ms
5 ms 5 ms
10 ms 10 ms
20 ms 20 ms
50 ms
50 ms
0.1 s
0.1 s
0.2 s
0.2 s
0.5 s 0.5 s

2. Check POSITION Range

a. Set:
SEC DIV
Horizontal MAG
mark generator.
positioned to the right of the center vertical graticule
line by rotating the Horizontal POSITION control fully
clockwise.
positioned to the left of the center vertical graticule
line by rotating the Horizontal POSITION control fully
counterclockwise.
mark generator.
vertical graticule line using the Horizontal POSITION
X10 Magnified
control.
20 ns
20 ns
50 ns
positioned to the left of the center vertical graticule
line by rotating the Horizontal POSITION control fully
0.1 ns
counterclockwise.
0.2 ns
0.5 ns
to the right of the center vertical graticule line by
rotating
i ns
clockwise.
2 ns
5 ns

3. Check Variable Range

10 ns
20 ns
center the display.
50 ns
counterclockwise.
0.1 ms
0.2 ms
0.5 ms
2 divisions or less.
1 ms
detent position.
2 ms
5 ms
instrument.
10 ms
20 ms

4. Check X Gain

50 ms
0.1 ms
from the calibration generator via a 5 0 -fl coaxial
X I
cable to the CH 1 OR X input connector.
Performance Check Procedure—2205 Service
b. Select 0.1 ms time markers from the tim e-
c. CHECK—The start of the sweep can be
d. CHECK—The tenth
e. Select 0.5 ms time markers from the tim e-
f. Align the 3rd time marker with the center
g. Set the Horizontal MAG switch to X I0.
h. CHECK—Magnified time
i. CHECK—Start of the sweep can be positioned
the Horizontal POSITION
a. Set the Horizontal MAG switch to XI and
b. Set the SEC/DIV
c. CHECK—The spacing between time markers is
d. Return the SEC/DIV Variable knob to the CAL
e. Disconnect the test equipment from the
a. Set:
VOLTS/DIV (both)
SEC/DIV
b. Connect a 50-mV, standard-amplitude signal
time marker can be
marker can be
control fully
Variable control fully
10 mV
X-Y
4-7