Tektronix 453 User Manual

A VARIABLE
B SWEEP
MODE
HORIZ
DISPLAY
MAG
A SWEEP
MODE
®
for delayed sweep operation only. VARI-
ABLE controls must be in CAL positions for
calibrated sweep rates.
Provides continuously variable A sweep
rate to
at least 2.5 times setting of the
A
TIME/DIV switch. A sweep rate is cali-
brated when control
is set fully clockwise
to
CAL.
Selects B sweep operation mode.
TRIGGERABLE AFTER DELAY TIME: B
sweep circuit
will not produce a sweep
until a trigger pulse is received follow-
ing the delay time selected by the
DELAY TIME (A TIME/DIV) switch and
the
DELAY-TIME MULTIPLIER dial.
B
STARTS AFTER DELAY TIME: B sweep
circuit
runs immediately following delay
time selected by the DELAY TIME switch
and
DELAY-TIME MULTIPLIER dial.
Selects horizontal mode
of operat·ion.
A: Horizontal deflection provided by A
sweep. B sweep inoperative.
A
INTEN DURING B: Sweep rate deter-
mined
by A TIME/DIV switch. An inten-
sified portion appears
on the sweep
during the B sweep
time. This position
provides a check of the duration and
position of the delayed sweep
(BJ with
respect to the delaying sweep (A).
DELAYED SWEEP (B): Sweep rate deter-
mined
by B TIME/DIV switch with the
delay
time determined by the setting of
the
DELAY TIME (A TIME/DIV) switch
and the DELAY-TIME MULTIPLIER dial.
Sweep mode determined
by B SWEEP
MODE switch.
EXT HORIZ: Horizontal deflection pro-
vided
by an external signal.
Increases sweep rate
to ten times setting
of A or B TIME/DIV switch by horizontally
expanding the center division of the
dis-
play. Light indicates when magnifier is
on.
Determines the operating mode
for A
sweep.
AUTO TRIG: Sweep initiated by the ap-
plied trigger signal
using the A Trig-
gering controls when the trigger signal
repetition rate
is above about 20 hertz.
For lower repetition rates or when there
is no trigger signal, the sweep free runs
at the sweep rate selected by the A
TIME/DIV switch to produce a bright
reference trace.
NORM TRIG: Sweep initiated by the ap-
plied trigger signal
using the A Trig-
gering controls. No trace is displayed
when there
is no trigger signal.
RESET
A SWEEP
LENGTH
POSITION
FINE
1 kHz CAL
POWER ON
Side Panel
ASTIG
B TIME/DIV-
VARIABLE
PROBE LOOP
A GATE
B GATE
CH 1 OUT
Operating Instructions-Type 453/R453
SINGLE SWEEP: After a sweep is display-
ed, further
swe·eps cannot be presented
until the RESET button is pressed. Dis-
play is triggered as for NORM opera-
tion using the A Triggering controls.
When the
RESET button is pressed (SIN-
GLE SWEEP mode), a single display will
be presented (with correct triggering) when
the next trigger pulse
is received. RESET
light (inside RESET button) remains on
until a trigger is received and the sweep is
completed. RESET button must be pressed
before another sweep can be presented.
Adjusts length of A sweep.
In the FULL
position (clockwise detent), the sweep is
about 11 divisions long. As the control is
rotated counterclockwise, the length of A
sweep
is reduced until it is less than four
divisions long
just before the detent in
the fully-counterclockwise position is reach-
ed.
In the B ENDS A position (counter-
clockwise detent), the A sweep
is reset
at the end of the B sweep to provide the
fastest possible sweep repetition rate
for
delayed sweep displays.
Controls horizontal position of trace.
Provides more precise horizontal position
adjustment.
Calibrator output connector.
Light: Indicates that POWER switch 1s
on and the instrument is connected to
a line voltage source.
Switch: Controls power to the instrument.
Screwdriver adjustment used
in conjunc-
tion
with the FOCUS control to obtain a
well-defined display.
Does not require
readjustment
in normal use.
Provides continuously variable sweep rate
to at least 2.5 time·s setting of B TIME/DIV
switch. B sweep rate is calibrated when
control
is set fully clockwise to CAL.
Current loop providing five-milliampere
square-wave current
from calibrator cir-
cuit.
Output connector providing a rectangular
pulse coincident
with A sweep.
Output connector providing a rectangular
pulse coincident
with B sweep.
Output connector providing a sample of
the signal applied
to the Channel 1 IN-
PUT connector when the TRIGGER switch
is in the NORM position.
2-5

Tektronix 453 Specifications

General

Brand	Tektronix
Model	453
Category	Test Equipment
Language	English