Tektronix 5441 Instruction Manual page 16

Operating Information-5441lR5441
10. Rotate the GRAT ILLUM control throughout its
range and notice that the graticule lines are illuminated as
the control is turned clockwise. Set control so graticule lines
are illuminated as desired.
Performance Check
11. Move the trace two divisions below graticule center
and reconnect the calibrator signal to the amplifier plug-in
input connector.
12. The display should be four divisions in amplitude
with six complete cycles (five complete cycles for 50 Hz line
frequency) shown horizontally. An incorrect display indi-
cates that the oscilloscope mainframe or plug-ins need to be
adjusted.
Readout
13. Turn the READOUT INTENS control clockwise until
an alphanumeric display is visible within the top or bottom
division of the crt (reset the FOCUS control if necessary for
best definition of the readout). Change the Volts/Div switch
of the amplifier plug-in that is selected for display. Notice
that the readout of the display changes as the de-
flection factor is changed. Likewise, change the SecIDiv
switch of the time-base unit that is selected for display. No-
tice that the readout display for the time-base unit changes
also as the sweep rate is changed.
panel. Also, use the signal to externally trigger the time-
base plug-in.
19. Slowly rotate the INTENSITY control counterclock-
wise until the trace appears to be a series of dimmed and
brightened segments. The brightened segments correspond
with the tops of the square waves.
Storage Operation (Variable Persistence)
20. Disconnect the 5 V, 1 kHz sine-wave or square-
wave signal from the EXT INTENSITY INPUT connector.
Reset the time-base plug-in triggering controls for an
internally-triggered display from the vertical plug-in.
21. After making sure the calibrator signal is still con-
nected to the amplifier plug-in input connector, set the con-
trols on the time-base plug-in for single-sweep operation.
Press the STORE button and note that the crt will momen-
tarily be flooded positive (becoming quite bright).
22. Press the Reset button on the time-base plug-in.
One sweep will be generated, and a display should be visi-
ble, but will fade out within a few seconds. lncrease the
VARIABLE PERSIST control setting if a display of longer
retention is required. lncrease the WRITING SPEED setting
to increase the background level for viewing lightly written
14. Set the time-base unit for magnified operation. No-
information. If there is not display visible, increase the IN-
tice that the readout display changes to indicate the correct
TENSITY control setting and press the Reset button.
magnified sweep rate. 1f.a readouccoded 1 OX probe is avail-
able for use with the vertical unit, install it on the input con-
nector of the vertical plug-in. Notice that the deflection
23. Press the ERASE button; the crt should turn positive
factor indicated by the readout is increased by 10 times
and erase. Press the Reset button on the time-base plug-in
when the probe is added. Return the time-base unit to nor-
to obtain another stored display on the crt. Press the SAVE
ma1 sweep operation and disconnect the probe.
button; the display is stored and no other sweep or change
in position will affect the display. The SAVE button, when
pushed, locks out the sweep erase circuit and cuts of the
15. Notice that the readout for a particular plug-in occu-
pies a specific location on the display area. If either of the
vertical plug-in units is a dual-trace unit, notice that the read-
out for channel 2 appears within the lower division of the crt
below the readout for channel 1.
Beam Finder
16. Move the display off-screen with the vertical position
control.
17. Push the BEAM FINDER button and observe that
the display compresses into the screen area. Reposition the
display to screen center and release the BEAM FINDER
button.
External Intensity Input
18. Connect a 5 V, 1 kHz sine-wave or square-wave sig-
nal to the EXT INTENSITY INPUT connector on the rear
current to the flood gun cathode as long as the VARIABLE
PERSIST control is turned fully clockwise (display stored at
the maximum time). Turning the VARIABLE PERSIST (Save
Time) control counterclockwise will decrease the time a
stored display is retained on the crt. When the display is not
being used, turn the \IARIABLE PERSIST (Save Time) con-
trol fully clockwise; the display will not be visible on the
screen, but the information has not been lost or destroyed.
Turn the VARIABLE PERSIST (Save Time) control counter-
clockwise until a display is visible when needed.
NOTE
The 544 1 Save Time control and the Variable Persis-
tence control are combined into one control. If the
VARIABLE PERSIST (Save Time) control has been
adjusted to view the display in the Save mode and the
544 1 is then taken out of the Save mode, the display
will fade rapidly, since the persistence is now set for a
shorter time.
2-2
REV MAY 1982