Controls, Connectors, and Indicators
AUTO Sweep free runs in the absence of a triggering signal.
The trigger level changes only when the LEVEL
control is adjusted to a new position or when
INIT@50% is pressed.
NORM Sweep is triggered and runs when an adequate
triggering signal is applied, in the absence of an
adequate triggering signal, the A Sweep does not
run,
except when the input coupling of the trigger-
source channel is set to GND. If the selected source
is Vert, and the Add vertical display is selected, the
A Sweep free runs if Channel 1 and Channel 2 input
coupling are both set to GND.
SGL SEQ When armed by pushing the lower MODE button, the
sweep runs once for each of the traces defined by
the following controls: Vertical MODE. A and B
SEC/DIV, and At or 1/At. Each sweep requires a
distinct A-Sweep triggering event. The READY
indicator remains illuminated until the final trace in
the sequence is completed. At the end of the display
sequence, scale-illumination flashes and the readout
display is written once to present the scale factors
and other readout data.
B-Trigger Modes:
RUN AFT The B Sweep runs immediately after the delay time
DLY set by A SEC/DIV, A REF OR DLY POS, and, if At
or 1/At is active, A.
TRIG AFT The B Sweep runs when triggered after the set
DLY deiay, determined by the same controls as for RUN
AFT DLY. provided the A Sweep has not terminated.
TRIG A DLY Only with the available CTT, and with At or 1/At
active,
the B-Trigger Slope and Level for the A delay
can be set separately from those for the REFerence
delay. If both TRIG AFT DLY and TRIG A DLY
indicators are on, the B-Trigger Slope and Level are
common for the two delays. TRIG A DLY should
normally be used with VERT trigger source for
B Trigger. Pressing the lower trigger Mode button
alternates between TRIG AFT DLY and TRIG A DLY
and the controls are alternately directed to the two
triggers.
2465B/2455B/2445B Operators
5-21
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