Tektronix 2212 Service Manual page 120

Performance Tests
4-18
Step 2. Check 500 kHz Trigger Sensitivity
a. Connect the leveled sine-wave generator output via a 50
n
BNC coaxial cable and a 50
n
termination to the CH
1
OR X
input connector. Set the
SEC/DIV
to 2 µs.
b. Set the leveled sine-wave generator to produce a
3.5-division display at an output frequency of 500 kHz.
c. Set the CH
1
VOLTS/DIV
switch to
1
V.
d. CHECK - That a stable display can be obtained by adjust-
ing the Trigger
LEVEL
control for each switch combination
given in Table
4-4
with DC, LF REJ and AC Trigger
COUPLING; and that the display will not trigger with
NOISE
REJ or HF REJ Trigger COUPLING. Ensure that the TRIG'D
light comes on when triggered.
Step 3. Check 5 MHz Trigger Sensitivity
a. Connect the leveled sine-wave generator output via a 50
n
BNC coaxial cable and a 50
n
termination to the
CH
1
OR X
input connector. Set the SEC/DIV to 0.2 µs.
b. Set the leveled sine-wave generator to produce a 3.5-divi-
sion display at an output frequency of 5
MHz
at
0.1 V/DIV.
c. Set the CH
1
VOLTS/DIV
switch to
1
V.
d. CHECK - That a stable display can be obtained by adjust-
ing the Trigger
LEVEL
control for each switch combination
given in Table
4-4
with DC, LF REJ and AC Trigger
COUPLING; and that the display will not trigger with
NOISE
REJ or HF REJ Trigger COUPLING. Ensure that the TRIG'D
light comes on when triggered.
Step
4.
Check 50 MHz Trigger Sensitivity
a. Set the leveled sine-wave generator to produce a one-divi-
sion display at an output frequency of 50 MHz.
b. CHECK - That a stable display can be obtained by adjust-
ing the Trigger
LEVEL
control for each switch combination
given in Table
4-4
with DC, LF REJ, and AC Trigger
COUPLING; and that the display will not trigger with
NOISE
REJ or HF REJ Trigger COUPLING. Ensure that the TRIG'D
light comes on when triggered.
c. Disconnect the test equipment from the instrument.
Performance Verification