Tektronix T921 - Page 177

Voltages shown on this schematic digaram were measured with a Tektronix DM 501 Digital Multimeter . Voltage
measurements can vary as much as ±20% . No signals were applied to the vertical orthe
X
(external
trigger) input . See Waveform
Conditions for T922 or T922R control settings .
VOLTAGE CONDITIONS
WAVEFORM CONDITIONS
Waveforms below were monitored with a Tektronix 7704A Oscilloscope, 71371 Time Base, and 7A15A Amplifier and
a
10X
probe . The oscilloscope input coupling was set to ac . Waveforms may vary as much as ±20% .
A 1 kHz, 50 mV sine wave was applied to Channel 1 input and a 1 kHz, 50 mV square wave was applied to
Channel
2
input
.
A Tektronix FG 501 Function Generator provides either of the input waveforms . .
The T922 or T922R controls were set as follows :

VOLTS/DIV
(both)

20 mV
AC-GND-DC (both)

DC
Vertical Mode

DUAL TRACE
SOURCE

INT
MODE

AUTO
SLOPE

+OUT
SEC/DIV

.5 ms
LEVEL

As required
The other controls were
set
as
needed
to
obtain a display .
The
CH
1 POSITION control was adjusted so that the bottom of the sine wave was on the first horizontal graticule line
above the center and the CH 2 POSITION control was adjusted so that the top of the square wave was on the first horizontal
graticule line below the center .
*Screen positions for waveforms 2, 3, 4, and 5 are affected by settings of the T922 or T922R POSITION
controls .
ADJUST TRIGGERING

ADJUST TRIGGERING
AS NECESSARY

AS NECESSARY
CD