Controls, Connectors, and Indicators
43) SLOPE Button Determines whether the A Trigger or B Trigger respond
and Indicators to the positive-going or the negative-going slope of a
signal.
With the available TV enhancement, Slope
selects positive or negative sync polarity. With the
available CTT, in Logic Trigger modes. Slope determines
whether the high ( +
)
or low (-) state of the signal is the
true input to the logic function.
[44) A SWP Illuminates when the A Sweep is triggered. It
TRIG'D extinguishes a short time after completion of a sweep
Indicator unless a triggering signal is received.
45) READY
Indicator
Illuminates when Sgl Seq mode is selected and the A
Sweep is armed and waiting for a triggering event to
occur. It extinguishes following the completion of ail the
traces selected for the Sgl Seq display.
[46) HOLDOFF
Control
Varies the time from the end of an A Sweep to enabling
the next sweep to be initiated by the triggering signal.
This control can be set to stabilize some aperiodic
signals. In the B ENDS A position (fully clockwise)
trigger holdoff time is minimum, and A Sweep terminates
immediately at the end of the B Sweep. This enables the
fastest possible sweep-repetition rate at slow A-Sweep
speeds.
(47) INIT@50%
Button
Initializes the trigger level at the midpoint between
peaks, for either the A Trigger or B Trigger, in any
mode.
If Vert trigger source is selected and more than one
channel is displayed, IN!T@50% automatically sets the
trigger source to the lowest numbered of the displayed
channels. However, with the available CTT, with a
"slaved delta-time" display and separate B-Trigger
settings for reference and delta delays, INIT@50% sets
the level for each of the first two channels separately
and does not change the trigger source. If Sgl Seq
mode is selected, the A-Trigger mode changes to Norm.
2465B/2455B/2445B Operators
5-25
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