Tektronix T912 - And Storage

Adjustments—
T912
A.
DISPLAY,
POWER
SUPPLY,
AND
STORAGE
Equipment
Required
1.
Digital
Voltmeter
5. 50 Q
Termination
2.
Time-Mark
Generator
6.
Screwdriver
3.
Sine-Wave
Generator
7. Low-Capacitance
Alignment
Tool
4. 50 n
BNC
Cable
1.
Preliminary
Control Settings
NOTE
Do not
preset
internal
controls.
STORE
nonstore
(button
out)
ENHANCE
LEVEL
fully
ccw
INTENSITY
midrange
Vertical
Mode
CH
1
CH 1
VOLTS/DIV
1 V
(1X)‘
VOLTS/DIV
VAR
(both)
detent
(cw)
AC-GND-DC
(both) GND
SEC/DIV
.1
ms
X1-X10
XI
(fully
ccw)
SOURCE
INT
MODE
AUTO
SLOPE
-FOUT
LEVEL
midrange
CH 1
POSITION
midrange
Horizontal
POSITION
midrange
Set all
other
controls
as
desired.
The
oscilloscope
should
produce
a
baseline
trace
with
the
controls
set as
above. Adjust the
INTENSITY
and
FOCUS
controls (on
front
panel), and
ASTIG
control
(left
side of
cabinet)
as
needed
to maintain a
well-defined
display.
2.
-8
V
Power
Supply
NOTE
Do
not
change
the
setting
of the
—8
V
adjustment
unless
you intend to
re-adjust
the
entire
instrument.
a. Connect
digital
voltmeter between
the
-8
V side
of
R775
and ground
(see Fig.
4-1).
If
meter
does not
read
between
-7.96
V and
-8.04
V, proceed
to
part b.
b.
ADJUST—
R773,
—8
V Adj (see
Fig.
4-1) for
—8.00
V
dc.
c. Disconnect
digital
voltmeter.
3.
Trace
Rotation
a.
Position
trace vertically
to
center horizontal
graticule
line.
b.
ADJUST—
TR ROT, R472,
to align
trace
with center
horizontal
graticule line.
Fig.
4-1.
Power
supply
adjustment location
(bottom
of T912),
'Refers to window
on VOLTS/DIV
switch
knob. Use
IX
probe window
unless
otherwise specified in individuai
steps
of the
procedure.
REV C, JUN 1978
4-3