Figure
3-15.
Pulse
Profile,
Frequency
List
Segment
Number
1
T
o
measure
another
frequency
,
select
the
appropriate
active
segmen
t.
When
either
of
these
calibration
pro cedures
is
complete,
the
device
can
b e
connected
for
measuremen
t.
Again,
in
b oth
of
these
pro cedures,
note
that
when
y
ou
press
the
k
ey
to
measure
the
calibration
standard,
the
HP
8510
pulse
output
is
set
to
the
active
state
(RF
alwa
ys
On)
during
measuremen
t
of
the
standard.
This
ensures
that
the
calibration
data
at
ev
ery
p oint
is
with
resp ect
to
the
On
p ortion
of
the
pulse.
If
external
pulse
mo
dulation
is
used,
it
is
necessary
that
the
RF
is
On
during
measuremen
t
of
the
calibration
standard.
Measurement
After
calibration,
rst
view
the
resp onse
of
one
of
the
calibration
standards.
Figure
3-16
is
t
ypical:
the
trace
is
at
at
0
dB
when
the
pulse
is
On,
and
noisy
around
0
dB
when
the
pulse
is
O.
The
noise
during
pulse
O
will
v
ary
dep ending
up on
the
relativ e
signal
lev
els
in
the
reference
and
test
signal
paths.
Operation
3-19
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