Tektronix 454A - Page 13

REJ) or the trigger signal is in-
RESET
adequate,
the sweep free ru ns at
the sweep rate selected by the
TIME/DIV switch to produce a
reference trace.
NORM
TRIG: (Normal Trigger)
Sweep initiated
by the applied
A SWEEP LENGTH
trigger signal
at any point selec-
ted by the LEVEL/SLOPE con-
trol over
the frequency range
selected by the COUPLlI\JG
switch. Triggered sweep
can be
obtained only over
the ampli-
tude range of the.applied trigger
signal. When
the LEVEL/SLOPE
control
is outside the amplitude
range, the trigger repetition rate
is outside the frequency range
selected by the COUPLING
switch,
or the trigger signal is in-
adequate,
there is no trace.
1 V CAL 1 kHz
SINGLE SWEEP:
After a sweep is
displayed, further sweeps cannot
be presented until the RESET
Side Panel
button is pressed. Display is trig-
gered
as for NORM operation
B TIME/DIV
using
the A Triggering controls.
VARIABLE
®
454A
When
the RESET button is pressed
(SINGLE SWEEP mode), a single
display will be presented (with cor-
rect triggering). After the sweep is
completed, the RESET button
must be pressed again before an-
other sweep can be displayed.
Adjusts length of A sweep. In the
FU LL position (clockwise detent),
the sweep is about 11 divisions
long. As
th is control is rotated
counterclockwise, the length of A
sweep
is reduced u ntH it is less than
four divisions long just before the
detent in the fully-counterclock-
wise position
is reached. In the B
ENDS A position (counterclock-
wise
detent), the A sweep is reset at
the end of the B sweep to provide
the fastest possible sweep repetition
rate for delayed sweep signals.
Calibrator output connector.
Provides continuously variable B
sweep rate between
the calibrated
11