HP 8753D - Page 376

Knowing the
Instrument Modes
There
are
ve
major
instrument modes
of the
analyzer:
network
analyzer
mode
external
source
mode
tuned
receiver
mode
frequency
oset
operation
harmonic
mode
operation
(Option
002)
The
instrument
mode
menu
can
be
accessed
by
pressing
4
SYSTEM
5
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INSTRUMENT
MODE
.
This
menu contains
the following
softkeys:
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NETWORK
ANALYZER
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EXT
SOURCE
AUTO
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EXT
SOURCE
MANUAL
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TUNED
RECEIVER
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FREQ
OFFS
MENU
Network
Analyzer
Mode
This
is
the
standard
mode
of
operation
for
the
analyzer,
and
is
active
after
you
press
4
PRESET
5
or
switch
on
the
A
C
power
.
Pressing
4
SYSTEM
5
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INSTRUMENT
MODE
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NETWORK
ANALYZER
returns
the
analyzer
to
the
\normal"
network
analyzer operating
mode
.
This
mode uses
the
analyzer's
internal
source
.
External Source
Mode
This mode
allows the
analyzer to
phase lock
to
an
external
CW
signal.
External
source
mode
is
best
used
for
unknown
signals
,
or
for
signals
that
drift.
If
a
synthesized
external
source
is
used,
the tuned
receiver mode
is
recommended
because
it
is
faster
.
Primary Applications
External
source mode is useful in several applications:
when your test device is a mixer or other frequency translation
device
in automated test applications where a source is already connected to the
system, and you do
not want to switch between the system source and the analyzer's internal source
.
Application and Operation Concepts 6-109