HP 8753D - Page 288

Sweep Type
Menu
The
following
softkeys
are
located within
the sweep
type menu.
Among them
are the
ve
sweep
types
available
.
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
N
N
N
LIN
FREQ
(linear
frequency
sweep).
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
LOG
FREQ
(logarithmic
frequency sweep).
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
LIST
FREQ (list
frequency
sweep)
provides
access
to
the
single/all
segment
menu.
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
POWER
SWEEP
.
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
CW
TIME
(CW
time
sweep).
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
EDIT
LIST
allows list
frequencies to
be entered
or modied
using
the
edit
list
menu
and
edit
subsweep
menu.
The
following
sweep
types
will
function
with
the
interpolated
error-correction
feature
(described
later):
linear
frequency
power
sweep
CW
time
The
following
sweep
types
will
not
function
with
the
interpolated error
correction feature
(described
later):
logarithmic
frequency
sweep
list
frequency
sweep
Linear
Frequency
Sweep
(Hz)
The
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
LIN
FREQ softkey
activates
a
linear
frequency
sweep
that
is
displayed
on
a
standard
graticule
with
ten
equal
horizontal
divisions
.
This
is
the
preset
default
sweep
type
.
F
or
a
linear
sweep
,
sweep
time
is
combined
with
the
channel's
frequency span
to compute
a
source
sweep
rate:
sweep
rate
=
(frequency
span)
/
(sweep
time)
Since
the
sweep
time
may
be
aected
by various
factors,
the equation
provided here
is
merely
an
indication
of
the
ideal
(fastest) sweep
rate.
If the
user-specied sweep
time is
greater
than 15 ms times
the number of points
, the sweep changes from a continuous ramp sweep
to a stepped CW sweep
.Also
, for 10 Hz or 30 Hz IF bandwidths the sweep is automatically
converted to a stepped CW sweep
.
In the linear frequency sweep mode it is possible
, with Option 010, to transform the
data for
time domain measurements using the inverse F
ourier transform technique
.
Application and Operation Concepts 6-21