Check Internal Triggering; Check External Triggering; Switch Combinations Fo R Triggering Checks - Tektronix 2213 Instruction Manual

Adjustment Procedure— 2213 Service
f. Set TRIGGER MODE to NORM.
g. CHECK—TRIG'D LED is illuminated when a stable
display is present and is o ff when the display is not
triggered.

3. Check Internal Triggering

a. Set the CH 1 VO LTS/DIV switch to 2 mV.
b. Set the generator output to produce a 4-division,
2-MHz display.
c. Set the CH 1 VO LTS/DIV switch to 20 mV.
d. CHECK—Stable display can be obtained by adjusting
the TRIGGER LEVEL control fo r each switch combination
given in Table 5-9.
Table 5-9

Switch Combinations fo r Triggering Checks

TRIGGER MODE
NORM
NORM
AUTO
AUTO
e. Move the generator output from the CH 1 OR X
input connector to the CH 2 OR Y input connector. Set
VER TICAL MODE to CH 2.
f. Repeat part d.
g. Set the SEC/DIV switch to 0.05 jus.
h. Set the generator to produce a 1.5-division, 60-MHz
display.
i. Repeat part d.
5-18
TRIGGER SLOPE
S
■V
s
j. Move the generator output from the CH 2 OR Y
input connector to the CH 1 OR X input connector. Set
VER TICAL MODE to CH 1.
k. Repeat part d.
I. Disconnect the test setup.

4. Check External Triggering

a. Set:
VOLTS/DIV (both)
SEC/DIV
VERTICAL MODE
b. Connect the test setup as shown in Figure 4-1.
c. Set the leveled sine-wave generator to produce a
5-division, 50-kHz display.
d. Set:
SEC/DIV
SOURCE
VERTICAL MODE
e. Move the signal from the CH 1 OR X input connector
to the EXT INPUT connector.
f. Set the generator to 2 MHz.
g. CHECK— Stable display can be obtained by adjusting
the TRIGGER LEVEL control fo r each switch combination
given in Table 5-9.
h. Remove the 10X attenuator from the test setup and
set the EXT COUPLING switch to DC-M0.
i. Repeat part g.
j. Set:
VOLTS/DIV (both)
VERTICAL MODE
SEC/DIV
SOURCE
10 mV
20
ns
CH 1
0.2 #ts
EXT
CH 2
50 mV
CH 1
20
ms
INT
REV NOV 1981