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HP 1630D User Manual

HP 1630D
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Model
1630A/D/G

Timing
Measurements
INTRODUCTION
Chapter
6
Timing
Measurements
Timing
analysis
is
directed
toward
timing
relationships
between
I/O
signals
or
control
lines,
and
propagation
delays
between
or
across
logic
gates
.
When
the
logic
analyzer
is
configured
fortiming
analysis,
samples
of
data
are
taken,
asynchronously,
on
every
pulse
of
a
clock
internal
to
the
analyzer
.
The
analyzer
determines
whether
the
data
is
less
or
greater
than
a
prespecified
threshold
voltage
level
and
displays
the
result
as
either
a
logic
1
or 0
.
The
display
stays
at
the
same
level
until
the
next
sample
is
taken
.
Glitches
Glitches
are
handled
bya
glitch
detectioncircuitwhich
is
independentof
the
sampling
rate
.
Dual
detectors
are
on an
alternate
sample
period
with a
slight
overlap
.
Each
detector
looks
for
two
threshold
crossings,
identifying
a
glitch
.
If
a
glitch
is
found,
it
is
stored
in
a
memory
separate
from
the
timing
data
.
When
glitch
detection
is
on, the
assigned
timing
channels
are halved
.
Triggering
Trigger
detection
is
accomplished
by
a
method
independent
of
the
sampling
clock
.
To
eliminate
false
triggering,
the
analyzer
has
a
filter
which
is
used
when
specifying
trigger
duration
.
Trigger
pattern
duration
is
selectable
from20ns
to
1ms
to
qualify
the
trigger
on
a
time
basis
.
Edge
triggering
is
available
on
four
channels
per
pod
assigned
to
timing
measurements
.
It
is
used
where
a
pattern
may
not
be
adequate
for
triggering
or
may
be
used
to
qualify a
pattern
.
With
edge
detection,
triggering
can
take
place
on
an
edge
that
doesn't
show
up
in
the
trace
(glitch
triggering)
.
When
the
analyzer
finds
the
trigger,
thetracepoint
is
positionedasspecified
in
the
specification
menu
(at
start,
center,
or
end
of
trace)
.
The
trace
specification
tells
the
analyzer
when
to
stop
the
measurement
.
Enough
information
is
captured
after
the
triggerto
place
it
properly
in
trace
memory
.
Usually
timing
measurements
are
taken
with
the
trigger
in
thecenter
trace
position
.
The
tracepoint
may
be
delayed
up
to
9999
seconds
afterthe
trigger
.
SIMPLE
TIMING
MEASUREMENTS
The
following
procedure
shows
how
to
make
measurements
of
time-related
activity
in
logic
systems
.
How
to
trigger
traces
of
electrical
activity
and
how
to
compose
desired
displays
and
measure
activity
on
the
displays
are
described
in
step
by
step
processes
.
Activating
The
Timing
Analyzer
1
.
Press
the
SYSTEM
key
.
2
.
Press
the
ROLL
down
key
one
time
or
CURSOR
down
key
two
times
.
This
moves
the
bright
bar
to
the
second
analyzer
configuration
.
All
channels
which
can
collect
timing
information
are
activated
for
timing
measurements
.

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HP 1630D Specifications

General IconGeneral
BrandHP
Model1630D
CategoryMeasuring Instruments
LanguageEnglish

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