Tektronix 222 Operator's Manual page 144

Checking Performance -222 DSO Operators
h. SET: CH 1 Coupling CHI OFF
CH
2
Coupling DC
CH
2
VOLTS/DIV 0.5 V
SECIDIV
5
FS
i. Disconnect the Channel 1 probe tip from the test equipment
and connect the Channel
2
probe tip.
j.
Vertically center the display.
k.
Repeat parts c, d, e, and
f
for CH
2.
I. Disconnect the test equipment from the oscilloscope.