HP 8753D - Page 261

T
o
A
ctivate
Chop
Sweep
Mode
Y
ou
can
use
the
chop
sweep
mode
to
make
two measurements
at the
same time
.F
or example
,
the
analyzer
can
measure
A/R
and
B/R
simultaneously
.Y
ou can
activate the
chop mode
by
pressing
4
PRESET
5
or
by
the
following
the
sequence
below
.
Press
4
CAL
5
N
N
N
N
NN
NN
NN
NN
NN
MORE
N
N
N
N
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
CHOP
A
and
B
.
F
or
more
information,
refer
to
\Alternate
and
Chop
Sweep
Modes"
in
Chapter
6.
T
o
Use
External
Calibration
Ooading
the
error
correction
process
to an
external PC
increases throughput
on the
network
analyzer
.
This
can
be
accomplished with
remote only
commands.
Refer to
the
HP
8753D
Programmer's
Guide for
information on
how to
use external
calibration.
T
o
Use
F
ast
2-P
ort
Calibration
With the
2-port
calibration
on,
faster
measurements
may
be
made
by
not
measuring
the
reverse
path
for
every
forward
sweep
.
This
is
controlled
by
the
test
set
switch
command.
When making
measurements
using
full
two-port
error-correction,
the
following
types
of
test
set
switching can
be dened
by
the
user:
Hold: In
this
mode
the
analyzer
does
not
switch
between
the
test
ports
on
every
sweep
.
The
measurement
stays
on
the
active
port
after
an
initial
cycling
between
the
ports
.
The
fastest
measurements
can
be
made
by
using
this
type
of
test
set
switching.
Pressing
the
4
MEAS
5
key
or
changing
to
a
dierent
S-parameter
measurement
will
cause
the
test
set
to
switch
and
cycle
between
the
ports
.
Continuous:
In
this
mode
the
analyzer
will
switch
between
the
test
ports
on
every
sweep
.
Although
this
type
of
test
set
switching
provides
the
greatest
measurement
accuracy,
it
also
takes
the
longest
amount
of
time
.
Number
of
Sweeps:
In
this
mode
there
is
an
initial
cycling
between the
test ports
and
then
the
measurement
stays
on
the
active
port
for
a
user-dened
number of
sweeps.
After
the
specied
number
of
sweeps
have
been
executed,
the
analyzer switches
between the
test
ports
and
begins the
cycle again.
This type
of
test
set
switching
can
provide
improved
measurement
accuracy
over
the hold
mode and
faster measurement
speeds
than
continuous
mode
.
1.
To
access the
test set
switch functions
, press:
4
CAL
5
N
N
N
N
N
N
N
N
N
N
NN
N
N
MORE
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
TEST
SET
SW
2. To activate the hold mode
, press:
4
0
54
x1
5
The analyzer will then display
NNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNN
TEST SET SW HOLD
.
3. T
o activate the continuous mode
, press:
4
1
54
x1
5
The analyzer will then display
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TEST SET SW CONTINUOUS .
5-54 Optimizing Measurement Results