Tektronix 442, Инструкция по эксплуатации

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Calibration Procedure—442 Service
Performance Check
LEVELED
SINE-WAVE
GENERATOR 442 OSCILLOSCOPE
2 3 7 4 - 7 A
Figure 4-3. Triggering and Z-Axls input check test setup.
12. Internal Triggering 35 MHz Check 14. EXT and EXT/10 LEVEL Range Check
a. Set:
a. Set:
SOURCE
MODE
MAGNIFIER
CH 1/CH 2
AUTO
X10 (button in)
b. Set the sine-wave generator frequency to 35 MHz
and output amplitude for a 1.5-division display.
MAGNIFIER
SEC/DIV
VOLTS/DIV (CH 1)
TRIGGERING MODE
SOURCE
SLOPE
CPLG
XI (button out)
20
fi
• 5 (IX)
AUTO
EXT
+ (out)
AC
c. CHECK—That a stable display can be obtained with
SLOPE in both + (out) and — (in) positions, and with
MODE in both AUTO and NORM settings.
d. CHECK—That a stable display can be obtained with
CPLG set to both DC and AC positions.
13. External Triggering 35 MHz Check
a. Set:
SOURCE EXT
b. CHECK—That a stable display can be obtained with
SLOPE in both + (out) and - (in) positions, and with
MODE in both AUTO and NORM settings.
c. CHECK—That a stable display can be obtained with
CPLG set to DC and AC positions.
b. Remove the 50 0 termination and connect the
adapter directly to the T-Connector. Set the generator
frequency to 50 kHz and output amplitude for a 4-division
display (2 V p-p). Set the Horizontal POSITION control to
move the display so the sweep start (left edge) can be
observed.
c. CHECK—That rotating the LEVEL control will
trigger the displayed signal at all points over a range with
the leading edge at least one division below to at least one
division abovethecenter horizontal graticuleline, andthat
the display is not triggered (free-runs) with the LEVEL
control at either extreme of rotation.
d. Set SLOPE to - (button in).
e. Repeat part c.
f. Set CPLG to DC.
R E V A M A Y 1980
4-9