Tektronix 7B92A Instruction Manual page 71

Performance Check/Calibration-7B92A
c. Check-set the MAIN TRIGGERING LEVEL control
near "0" and check that the TRIG'D light is on .
d . Check---that the display is not triggered (TRIG'D
light off) at either end of the MAIN TRIGGERING LEVEL
control rotation .
A16. Check Single Sweep Operation
a. Connect the time-mark generator to the input of the
vertical amplifier plug-in unit, using a 50-f2 cable; set the
generator for 1 ms markers.
d. Press the SINGLE SWEEP RESET pushbutton ; it
should be lit.
e. Check---change the MAIN TRIGGERING SOURCE
to I NT and observe that only one sweep is displayed and
SINGLE SWEEP RESET pushbutton goes out.
f. Set the TIME/DIV OR DLY TIME switch to Alternate
mode (PULL FOR ALT) .
g. Set the MAIN TRIGGERING SOURCEto EXT; press
the SINGLE SWEEP RESET pushbutton . The pushbutton
should be lit.
b. Set the vertical amplifier plug-in unit deflection h. Check--change the MAIN TRIGGERING SOURCE
factor for approximately two divisions of display; and to INT and observe that only one sweep is displayed and
adjust MAIN TRIGGERING LEVEL control for a stable SINGLE SWEEP RESET pushbutton goes out.
display.
i. Press SINGLE SWEEP RESET pushbutton several
c. Set the MAIN TRIGGERING SOURCE to INT, times and observe that display alternates between Delay-
MODE to SINGLE SWEEP, and SOURCE to EXT. ing and Delayed sweeps .