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HP 8753D - Page 507

HP 8753D
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from
0to
32767 and
terminate with
the
4
x1
5
key.
The default
value
of the
counter
is
zero
.
This
command
should
be
placed
in
a
sequence that
is
separate
from
the
measurement
sequence
.
F
or this
reason:
the
measurement
sequence
containing
a
loop
decision
command must
call
itself
in
order
to
function.
The
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LOOP
COUNTER
command
must
be
in
a
separate
sequence
or
the
counter
value would
always be
reset to
the initial
value
.
N
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LOOP
COUNTER
(Sequence
Filenaming)
inserts
the
string
\[LOOP]" into
the lename
.
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N
LOSS
accepts
a
power
loss
value
for
a
segment
in
the
power
meter
cal
power
loss
list.
This
value
,
for
example
,
could
be the
dierence
(in
dB)
between
the
coupled
arm
and
through
arm
of
a
directional
coupler
.
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LOSS/SENSR
LISTS
presents
the
power
loss/sensor
lists
menu.
This
menu performs
two
functions:
Corrects
coupled-arm
power
loss
when
a
directional
coupler
is
used
to
sample
the
RF
output.
Allows
calibration
factor
data
to
be
entered
for
one
or two
power
sensors
.
Each
function
provides
up to
12 separate
frequency
points
,
called
segments
,
at which
the user
may
enter
a
dierent
power
loss
or
calibration
factor.
The instrument
interpolates
between
the
selected
points
.
Two
power sensor
lists
are
provided
because
no
single
power
sensor
can cover
the
frequency
range
possible
with
an
HP
8753D
.
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LOW
PASS
IMPULSE
(Option
010
only)
sets
the
transform
to
low
pass
impulse
mode
,
which
simulates
the
time
domain
response
to
an
impulse
input.
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LOW
PASS
STEP
(Option
010
only)
sets
the
transform
to
low
pass
step
mode
,
which
simulates
the
time
domain
response
to
a
step
input.
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LOWER
LIMIT
sets
the
lower
limit
value
for
the
start
of
the
segment
in
a
limit
line
list.
If
an
upper
limit
is
specied,
a
lower
limit
must
also
be
dened.
If
no
lower
limit
is
required
for
a
particular
measurement,
force
the
lower
limit
value
out
of
range
(for
example
0
500
dB).
4
M/
5
mega/micro
(10
6
/
10
-6
)
NNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNN
MANUAL TRG ON POINT
waits for a manual trigger for each
point. Subsequent pressing
of this softkey triggers each measurement. The annotation
\man" will appear at the left side of
the display when the
instrument is waiting for the trigger to occur
. This feature
is useful in a test sequence when an external device or
instrument requires changes at each point.
4
MARKER
5
displays an active marker on the screen and provides access to
a series of menus to control from one to ve display markers
for each channel. Markers provide numerical readout of
measured values at any point of the trace.
The menus accessed from the
4
MARKER
5
key provide several
basic marker operations. These include special marker modes
for dierent display formats, and a marker delta mode that
Key Denitions 9-21

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