Tektronix 222 Operator's Manual page 150

Checking Performance -222 DSO Operators
x.
Position the waveform vertically to place the top of the signal 1
division below the center horizontal graticule line.
y. CHECK-that the signal remains triggered with the TRIG'D
indicator light on.
z. Disconnect the test equipment from the CH 2 probe tip.
3.
Check External Trigger Sensitivity
a. SET: CH 2 Coupling GND
CH 1 Coupling DC
CH 1 VOLTSIDIV 50 mV
Trigger SOURCE
EXT
SECIDIV 50 ns
STORUNONSTORE NONSTORE
b. Connect the Leveled Sine-Wave Generator output via a 5 0 4
termination, a BNC T-connector, and a BNC-to-male probe-tip
adapter to the CH 1 probe tip.
c. Connect the other side of the T-connector via a 5 0 4 coaxial
cable and BNC-female-to-dual banana connector to the EXT TRIG
and EXT TRIG COMM inputs.
d. Vertically center the display.
e. Set the Sine-Wave Generator for
4
divisions of amplitude at
10 MHz.
f. CHECK-that the display is stably triggered with the TRIG'D
indicator light on.
4.
Check External Trigger Level Range
a. SET: CHIVOLTSIDIV 1 V
SECIDIV 5 P S
b. Adjust the Leveled Sine-Wave Generator for maximum output
at 50 kHz (just over a 5-division display amplitude).
c. Vertically center the display and horizontally position the
beginning of the sweep at the second vertical graticule line.