Tektronix 1S1 Instruction Manual page 102

Amplitude Calibrator
Display
Millivolts/Cm
Input Atten
Millivolts/Cm Variable
Vc Range
Comparison Voltage
Input Coupling (Chan-
nel A)
Input Coupling (Chan-
nel B)
27. Check Vertical Position Range
a. Test equipment setup is shown in Fig. 5-43.
b. Turn the VERT POSITION control fully counterclock-
wise.
c. With the DC OFFSET control, position the trace at the
bottom graticule line.
d. With the VERT POSITION control, move the trace
up exactly 5cm on the graticule.
e. With the DC OFFSET control, reposition the trace
at the bottom graticule line.
f. Turn the VERT POSITION control fully clockwise.
g. Check that the trace moves upward more than 5cm,
for a total of more than 10cm in the two steps.
(For a 4-cm crt, the VERT POSITION control range can
be checked in 3 steps of 3 cm, 3 cm and 4 cm.)
Off
A-Vc
10
1
Calib (at detent)
0
6.000
Dc
Gnd
NOTES
28. Check DC Offset Range
a. Connect the 10X test probe to the test oscilloscope
vertical input connector.
b. Adjust the test oscilloscope trace for a zero-volt dc
reference level.
c. Touch the tip of the probe to the Type 1S1 OFFSET
OUTPUT lack.
d. Adjust the Type 1S1 DC OFFSET control to position
the test oscilloscope trace at its horizontal centerline.
e. Remove the test probe from the OFFSET OUTPUT jack.
f. With the Type 1S1 VERT POSITION control, position
the indicator oscilloscope trace to the top graticule line.
g. Turn the Type 1S1 DC OFFSET control to the counter-
clockwise end of its 10-turn range.
h. Check that the trace moves downward more than
5cm on the graticule (representing more than -1.0-volt
offset).
i. Touch the test probe to the Type 1S1 OFFSET OUT-
PUT jack.
j. With the Type 1S1 DC OFFSET control, return the
test oscilloscope trace to its zero-volt dc reference level.
k. Remove the test probe from the OFFSET OUTPUT
jack.
l. With the Type 1S1 VERT POSITION control, position
the indicator oscilloscope trace to the bottom graticule line.
m. Turn the DC OFFSET control to the clockwise end of
its 10-turn range.
n. Check that the trace moves upward more than 5 cm
on the graticule (representing more than +1.0-volt offset).
Calibration – Type 1S1
5-39