Magnified Sweep Display; External Horizontal Display - Tektronix 434 Instruction Manual

9. Set the TIME /DIV and horizontal POSITION con
trols for a display that remains within the display area
horizontally.
Magnified Sweep Display
1. Follow steps 1 through 9 of Non -Store Display .
2. Adjust the horizontal POSITION control to center
the area to be magnified to around the center vertical
division of the graticule . There should be equal amounts of
the area of interest on either side of the center graticule
line. If necessary , change the setting of the TIME/ DIV
switch and the POSITION control to obtain the desired
display .
3. Push in and turn the TIME / DIV knob clockwise to
achieve the desired amount of magnification (X2 , X5, X10 ,
X20 , or X50 , except for the five fastest TIME /DIV
settings, where the number of magnified ranges is limited
by the TIME /DIV positions remaining in the clockwise
direction of rotation ) . Adjust the INTENSITY control for a
visible display . The position of the TIME /DIV knob directly
indicates the magnified time/div . Adjust the horizontal
POSITION control to position the magnified display , or to
observe the beginning or end of the magnified sweep . (To
obtain fine positioning , use the vernier action of the control
by reversing the direction of knob rotation .) Disconnect the
signal from the CH 1 input connector .
REV. B , MAY , 1975
434
External Horizontal Display
1. Set the INTENSITY control fully counterclockwise.
2. Set the TIME /DIV switch to EXT HORIZ and the
Vertical Mode switch to CH 1 .
3. Set the POWER switch to the on position and allow
several minutes warmup .
4. Connect the X ( horizontal ) signal , not greater than 6
V P -P , to the EXT HORIZ input connector on the instru
ment rear panel .
5. Advance the INTENSITY control until the display is
visible . If the display is not visible , push the BEAM
FINDER button , center the compressed display with the
CH 1 and horizontal POSITION controls , then release the
BEAM FINDER button . Note that with the BEAM
FINDER button released , the horizontal deflection is
unaffected by other 434 controls when the TIME /DIV
switch is set at EXT HORIZ ; this is affected only by the
amplitude of the signal applied to the EXT HORIZ input
connector. With a square wave signal applied , the display
should consist of two dots separated horizontally by an
amount approximately equal to the amplitude of the
applied signal ( in volts ) divided by 0.5 (sensitivity ) .
11