HP 1740A - Special Display Modes (X-Y, Single Sweep)

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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