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HP 5335A - Page 41

HP 5335A
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Operation
and
Programming
3-122.
PULSE
A
3-123.
The
PULSE
A
mode
measures
the
width
of
puises
input
into
Channel
A.
With
the
SLOPE
A
switch
set
to
_/
■
"
,
positive
pulses
will
be
measured.
With
the
SLOPE
A
switch
set
to”\.
,
negative
pulses
will
be
measured.
This
mode
can
also
utilize
the
stop
channel
delay
hoidoff
(T.l.
DELAY)
feature,
described
for
TIME
A—B.
3-124.
For
continuous
pulse
streams,
set
the
trigger
level
for
AUTO
PRESET.
For
single-shot
pulses
or
special
applications,
use
the
manual
modes
of
triggering.
To
locate
and
measure
a
selected
pulse
within
a
data
stream
use
external
arming.
Set
the
START
ARMING
SLOPE
to
positive
or
negative,
when
measuring
a
pulse
on
Channel
A.
Position
the
edge
of
the
Arming
Signal
just
ahead
of
the
leading
edge
of
the
desired
pulse
and
set
EXT
ARM
ENABLE
to
on.
Setthe
trigger
level
for
AUTO
PRESET
(for
most
continuous
signals)
to
automatically
trigger
at
the
50%
point.
The
GATE
MODE
will
automatically
switch
to
MIN
and
a
single
pulse
measurement
will
be
made.
SELECTED
PULSE
NOTE
Pulse
measurements
are
specified
for
trigger
levels
between
the
40%
and
60%
points
of
the
signal.
3-125.
RATIO
C/A
3-126.
The
RATIO
C/A
mode
is
similar
to
the
RATIO
A/B
mode
(paragraph
3-115),
with
the
advantage
of
an
extended
frequency
range
for
ratio
measurements.
The
maximum
frequency
into
Channel
A
is
200
MHz,
and
into
C
Channel
it
is
1300
MHz.
Connect
the
higher
of
the
two
frequencies
to
the
C
Channel
Input
and
select
the
RATIO
C/A
mode.
The
ratio
will
be
displayed
with
the
resolution
being
determined
by
the
higher
frequency
and
the
selected
Gate
Time.
3-127.
PER
A
3-128.
The
PER
A
mode
allows
single
period
measurements
or
multiple
period
averages
to
be
made
on
input
signals
into
Channel
A.
In
this
mode,
the
input
is
not
prescaled
so
the
maximum
frequency
is
100
MHz.
In
NORM/FAST
GATE
MODES,
a
period
average
measurement
is
made
where
the
number
of
periods
averaged
is
determined
by
the
setting
of
the
GATE
ADJ
control
and
the
period
of
the
signal.
For
single
period
measurements,
set
the
GATE
MODE
to
MIN.
3-129.
RISE/FALL
A
3-130.
The
RISE/FALL
A
mode
automatically
configures
the
counter
to
perform
either
rise
or
fall
time
measurements.
The
input
is
automatically
set
to
COM
A
and
triggering
to
AUTO
TRIG,
in
this
mode,
AUTO
TRIG
automatically
locates
and
sets
the
trigger
levels
at
the
10%
and
90%
points
of
the
input
signal.
Rise
time
measurements
are
made
when
the
SLOPE
A
control
is
set
to
.
Fall
time
measurements
are
made
when
the
SLOPE
A
control
is
set
to~\_
•
Eor
rise
and
fall
measurements,
the
input
signal
must
be
continuous.
To
measure
the
rise
time
on
a
selected
slope
3-25
Model
5335A

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