Tektronix CURVE-TRACER 576 Instruction Manual page 27

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DISPLAY OFFSET NORM (OFF)
Selector
CENTERLINE VALUE 0
HORIZONTAL 1 V COLLECTOR
Vertical POSITION Centered
Vertical FINE POSITION Centered
Horizontal POSITION Centered
Horizontal
Centered
FINE POSITION
ZERO
Released
CAL
Released
DISPLAY INVERT
Released
MAX PEAK VOL T.S 15
PEAK POWER WATTS 0.1
VARIABLE COLLEC- Fully Counterclockwise
TOR SUPPLY
POLARITY AC
MODE NORM
LOOPING As is
COMPENSATION
NUMBER OF STEPS
CURRENT LIMIT
AMPLITUDE
OFFSET
STEPS
PULSED STEPS
STEP FAMILY
RATE
POLARITY INVERT
STEP MUL T .1X
Terminal Selector
LEFT-OFF-RIGHT
20 mA
.05 pA
ZERO
Pressed
Released
REP ON
NORM
Released
Released
BASE TERM
STEP GEN
OFF
Operating Instructions-Type 576
CRT and Readout Controls
4. TurntheGRATICULE ILLU[\1 control throughout its
range. Note that the graticule lines become illuminated as
the control is turned clockwise. Set the control for desired
illumination.
5. Turn the READOUT I LLUM control throughout its
range. Note that the fiber-optic readouts and the readout
titles become illuminated as the control is turned clockwise.
Set the control for the desired readout illumination. The
readout should read for these initial control settings;
1
mA
per vertical division, 1 V per horizontal division, 50 nAper
step and 20 k
~or
gm per division.
6. Turn the INTENSITY control clockwisr" until a spot
appears at the center of the CRT qraticule. To avoid burn-
ing the CRT phosphor, adjust the INTENSITY control until
the srot is easily visible, but not overly bright.
7.
Turn the FOCUS control throughout its range. Ad-
just the FOCUS control for a sharp, well-defined spot.
Positioning Controls
8. Turn the vertical FINE POSITION control through-
out its range. Note that the control has a range of at least
±2.5 divisions about the center horizontal line. Set the con-
trol so that the spot is centered vertically on the CRT grati-
cule.
9. Repeat step 8 using the horizontal FINE POSITION
control.
10. Turn the vertical coarse POSITION switch. Note
that the spot moves 5 divisions vertically each time the
switch is moved one position. (The most extreme positions
of the switch represent 10 divisions of deflection, which in
this case causes the spot to be off the CRT graticule.) Set
the POSITION-switch to the center position.
11. Repeat step 10 using the horizontal coarse POSI-
TION switch.
12. Set the POLARITY switch to -{PNP). Note that
the spot moves to tlie upper right corner of the CRT grati-
cule.
13. Set the POLARITY switch to +(NPN). Note that
the spot moves to the lower left corner of the CRT grati-
cule.
Vertical and Horizontal Sensitivity
14. Install the diode adapter (Tektronix Part No. 013-
REV JUL 1985
2-9