Tektronix 2212 User Manual page 224

Performance Tests
C- 22
Step 4. Check 60 MHz Trigger Sensitivity
a. Set the leveled sine-wave generator to produce a 1.2
division display at an output frequency of 60 MHz.
b. CHECK - That a stable display can be obtained by
adjusting the Trigger
LEVEL
control for each switch
combination given in Table C-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.
Step 5. Check External Trigger Range
a. SET:
VOLTS/DIV (CH 1) ....... 0.5 V
SEC/DIV ......................... 20 µs
Trigger COUPLING ....... AC
Trigger SLOPE ............... Positive Going
b. Connect the leveled sine-wave generator output via
a 50
n
BNC coaxial cable, a 50
n
termination and a
dual-input coupler, to the CH 1
OR X
and the
EXT
INPUT OR Z input connectors.
c. Set the leveled sine-wave generator to produce a
five-division display at an output frequency of 50 kHz.
d. Position the waveform equally around the center
horizontal graticule line.
e. SET:
Trigger MODE ............. NORM
Trigger SOURCE ........... EXT
f. CHECK - That the display is not triggered at either
extreme of rotation of the Trigger
LEVEL
control.
g. Toggle the Trigger
COUPLING
switch to
DC.
h. Repeat part f.
Rev 12/92 Appendix C: Performance Verification