Tektronix 2205 Service Manual

Adjust merit Pro cedu re—2205 Service
d. Use the Horizontal POSITION control to align
the second time marker with the second vertical
graticule line.
e. CHECK—Timing accuracy is within 3% (0.24
division at the tenth vertical graticule tine), and
linearity is within 5% (0.10 division over any two of
the center eight divisions).
NOTE
When checking the timing accuracy for SEC/
DIV switch settings from 50 ms to 0.5 s,
watch the time marker tips only at the second
and tenth vertical graticule lines while
adjusting the Horizontal POSITION control.
f. Repeat parts c through e for the remaining
SEC/DIV and time-mark-generator setting combi
nations shown in Table 5-4 under the “XI Normal"
column.
g. Set:
SEC/DIV 0.1 |xs
Horizontal MAG X I0
h. Select 20-ns time markers from the time-
mark generator.
i. Use the Horizontal POSITION controls to align
the first time marker that is 50 ns beyond the start of
the sweep with the second vertical graticule line.
j. 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.
k. Repeat parts i and j for the remaining SEC/DIV
and time-mark generator setting combination shown
in Table 5-4 under the “X10 Magnified” column.
l. Disconnect the test equipment from the
instrument.
9. Adjust X-Axis Gain (R395)
. a. Set: :
VOLTS/DIV (both) 10 mV
SEC/DIV X-Y
Horizontal MAG XI
Table 5-4
Settings for Timing Accuracy Checks
SEC/DIV
Switch
Setting
Time-Mark Generator Setting
XI Normal
X I0 Magnified
0.1 ps
0.1 ms
20 ns
0.2 ps
0.2 ms 20 ns
0.5 jxs
0.5 m s
50 ns
1 p.S 1 m s
0.1 ms
2 ms
2 MS 0.2 ms
5 ms
5 m s
0.5 MS
10 MS
10 MS
1 ms
20 ms
20 m s
: 2 MS
50 ms
50 MS
5 MS
0.1 ms
0.1 ms
10 ms
0.2 ms
0.2 ms '
20 MS
0.5 ms
0.5 ms
50 MS
1 ms
1 ms 0.1 ms
2 ms
2 ms 0.2 ms
5 ms
5 ms 0.5 ms
10 ms
10 ms 1 ms
20 ms
20 ms 2 ms
50 ms
50 ms
5 ms
: 0.1 s
0.1 s 10 ms
0.2 s 0.2 s 20 ms
0.5 s 0.5 s
60 ms
b. Connect a 50-mV, standard-amplitude signal
from the calibration generator via a 50-fl coaxial
cable to the CH 1 OR X input connector.
c. ADJUST—X Gain (R395) for exactly 5 divisions
of horizontal deflection.
10. Adjust X Offset (R736)
a. Set:
Channel 1 AC-GNO-DG GND
SEC/DIV 1 ms
b. Position the trace vertically to the center hori
zontal graticule line.
5-14

Tektronix 2205 Specifications

General

Brand	Tektronix
Model	2205
Category	Test Equipment
Language	English