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Operation
1740A-008
INTENSIFIED
Figure 3-7. Normal Display with Intensified Area
3-19.
X-Y DISPLAY.
a.
Press A VS B@. BEAM INTENSITY @ may
need
to be decreased.
Apply
vertical
(Y-axis)
signal
to channel
A INPUT @ connector
and horizontal
(X-axis) signal to channel
B INPUT connector. Chan-
nel A POSN @ adjusts
vertical
positioning;
POSI-
TION © adjust horizontal positioning.
Adjust channel
A and B VOLTS/DIV @ controls as required.
b.
If display is not visible, press BEAM FIND C3)
and
adjust channel
A and
B VOLT/DIV
controls
until display
is compressed
vertically.
Center com-
pressed
display
with
POSN
@ and
POSITION
©
1740A-009
Figure 3-8. Mixed Sweep Display
3-4
Model 1740A
controls.
Release
BEAM
FIND,
and
adjust
FOCUS
5) for a sharp display.
3-20.
SINGLE SWEEP OPERATION.
3-21.
Single sweep mode is often used to photograph
single occurrence
events.
To use
this mode,
proceed
as follows:
a.
Select SINGLE
© sweep mode.
b. Set AUTO/NORM to NORM@.
c.
Set all trigger processing
controls
to desired
settings;
for example,
INT/EXT@,
slope@,
and
TRIGGER LEVEL ©.
d.
Depress
RESET
© pushbutton;
the red
RE-
SET 30) lamp will light.
3-22.
The sweep circuitry is now
armed; as soon as
a
trigger
signal
is received
that
meets
the
preset
requirements
(slope,
coupling,
level,
etc.),
the
time
base will generate one sweep. As soon as the sweep
ends, the RESET
@ lamp
will extinguish
and
the
time base must be reset again.
3-23.
SINGLE
SWEEP
USING
TRIGGER
VIEW.
3-24.
To use the trigger view feature in single sweep,
perform the following steps:
a.
Press TRIG VIEW @. This turns off both ver-
tical channels; however, trigger view circuitry will not
be activated
until
a certain
transition
occurs
at the
end of the sweep.
b.
To activate trigger view, press RESET ® and
rotate TRIGGER
LEVEL @ from one extreme to the
other or engage AUTO @ and press RESET, then dis-
engage AUTO.
3-25.
After one sweep
has been manually
generated,
the necessary transition will have occurred and trigger
view mode will operate in a normal manner.
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|
17
an 44)
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