Tektronix 442, Инструкция по эксплуатации

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Calibration Procedure—442 Service
Performance Check
NOTE
10. Internal Triggering 2 MHz Check
In the following Triggering check steps, adjust the
LEVEL control, POSITION controls, and INTEN­
SITY control for a visible, stable triggered display
unless otherwise instructed.
a. Connect the test equipment as shown in Figure 4-3.
b. Set:
8. Low Frequency Triggering
a. Set:
VERT MODE
SOURCE
SEC/DIV
AC-GND-DC (CH 1)
MODE
INTENSITY
CH 1
CH 1/CH 2
10 m
DC
AUTO
For visible trace
b. Connect the bnc connector end of the 10X probe to
the Channel 1 input connector.
AC-GND-DC (CH 1)
VOLTS/DIV (CH 1)
SEC/DIV
SOURCE
MODE
INTENSITY
DC
.5 (IX)
.5
p
CH 1/CH2
AUTO
For visible display
c. Set the sine-wave generator frequency to 2 MHz
and adjust the generator output amplitude for a 1-division
display. Set the Channel 1 VOLTS/DIV switch to 1 (1 volt
per division, IX window).
NOTE
c. If the power input frequency is 60 Hz, lay the probe
tip near the power cord or other convenient ac line voltage
source (if the power input frequency is other than 60 Hz,
substitute an appropriate 60 Hz low-frequency sine-wave
generator signal in the remainder of this step).
d. Set the Channel 1 VOLTS/DIV switch and
VOLTS/DIV VAR control to provide a 0.5-division display.
Readjust the LEVEL control as required to maintain
a stable triggered display in the remainder of Step 10
through Step 13.
d. CHECK—A stable display can be obtained for the
.5-division signal with SLOPE in both + (out) and — (in)
positions and with MODE in both AUTO and NORM
settings.
e. Set MODE to NORM, and adjust LEVEL for a
triggered display.
e. CHECK—A stable display can be obtained with
CPLG set to both DC and AC positions.
f. CHECK—A stable display can be obtained with
CPLG in both DC and AC positions and with SLOPE in
both + (out) and — (in) positions.
9. Line Trigger
a. Set:
SOURCE LINE
SLOPE + (out)
b. Verify that a 0.5-division display is still present
(60 Hz signal).
c. CHECK—A stable display can be obtained with
MODE set to both AUTO and NORM, and with SLOPE set
to both + (out) and — (in).
d. Disconnect the probe from the test setup, and set
the Channel 1 VOLTS/DIV VAR control to the calibrated
detent (fully clockwise) position.
11. External Triggering 2 MHz Check
a. Set:
VOLTS/DIV (CH 1) .1 (IX)
b. Set the sine-wave generator output amplitude for a
1-division display (100 mV).
c. Set:
SOURCE EXT
d. CHECK—A stable display can be obtained with
SLOPE in both + (out) and - (in) positions, and with
MODE in both AUTO and NORM settings.
e. CHECK—A stable display can be obtained with
CPLG set to both DC and AC positions.
4-8
R E V A M A Y 1980