Controls, Connectors,
and
Indicators
5-24
@
SLOPE
Button
and Indicators
@
@
@
ASWP
TRIG'D
Indicator
READY
Indicator
HOLDOFF
Control
INIT@50%
Button
Determines whether the A Trigger or B Trigger respond
to
the positive-going
or
the negative-going slope
of
a
signal. With the available TVenhancement, Slope
selects
positive or negative sync polarity. With the
available
Crr,
in
Logic Trigger modes, Slope determines
whether the high
(+)
or
low ( - ) state
of
the signal is the
true input to the
logic function.
Illuminates when the A Sweep is triggered. It
extinguishes a short time after completion
of
a sweep
unless a triggering signal
is
received.
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
all the
traces
selected for the Sgl Seq display.
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.
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, INIT@50% automatically sets the
trigger source
to
the lowest numbered
of
the displayed
channels.
However, with the available
Crr,
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.
2465A/2455N2445A Operators
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