HP 8753D - Page 111

Loop
Counter
Example
Sequence
This
example
shows
you
the
basic
steps
necessary
for
constructing
a looping
structure within
a
test
sequence
.
A
typical
application
of
this loop
counter structure
is for
repeating a
specic
measurement
as
you
step
through
a
series
of
CW frequencies
or dc
bias levels
.F
or an
example
application,
see
\Fixed
IF
Mixer
Measurements"
in
Chapter
3.
1.
T
o
create
a
sequence
that
will
set
the
initial value
of the
loop counter
, and
call
the
sequence
that
you
want
to
repeat,
press:
4
SEQ
5
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SEQ/MODIFY
SEQ
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SEQUENCE
1
SEQ1
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SPECIAL
FUNCTIONS
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DECISION
MAKING
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LOOP
COUNTER
4
10
5
4
x1
5
4
SEQ
5
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DO
SEQUENCE
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SEQUENCE
2
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DONE
SEQ
MODIFY
This
will
create
a
displayed
list
as
shown:
SEQUENCE
LOOP
1
Start
of
Sequence
LOOP
COUNTER
10x1
DO
SEQUENCE
SEQUENCE
2
T
o
create
a
second sequence
that will
perform
a
desired
measurement
function,
decrement
the
loop
counter
,
and
call itself
until
the
loop
counter
value
is
equal
to
zero
,
press:
4
SEQ
5
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SEQ/MODIFY
SEQ
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SEQUENCE
2
SEQ2
4
MEAS
5
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Trans:
FWD
S21
(B/R)
4
SCALE
REF
5
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AUTO
SCALE
4
MARKER
FCTN
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MKR
SEARCH
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SEARCH:
MAX
4
SEQ
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SPECIAL
FUNCTIONS
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DECISION
MAKING
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DECR
LOOP
COUNTER
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IF
LOOP
COUNTER<>
0
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SEQUENCE
2 SEQ2
4
SEQ
5
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DONE
SEQ
MODIFY
This
will
create
a
displayed
list
as shown:
SEQUENCE LOOP 2
Start of Sequence
Trans: FWD S21 (B/R)
SCALE/DIV
AUTO SCALE
MKR Fctn
SEARCH MAX
DECR LOOP COUNTER
IF LOOP COUNTER <> 0 THEN DO
SEQUENCE 2
To run the loop sequence, press:
4
PRESET
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEQUENCE 1 SEQ1
2-62 Making Measurements