HP 8753D - Page 70

Setting
the Electrical
Delay
This
feature adds
phase
delay
to
a
variation
in
phase
versus
frequency
,
therefore
it is
only
applicable
for ratioed
inputs
.
1.
Press 4
FORMA
T
5
NN
NN
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NN
N
N
N
N
N
N
N
N
N
PHASE .
2.
Press
4
MARKER
F
CTN
5
and
turn
the
front
panel
knob
or
enter
a
value
from the
front panel
keypad
to
position
the
marker
at
a
point
of
interest.
3.
Press
N
N
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N
N
N
N
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N
N
N
N
N
N
N
N
N
N
NN
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N
N
N
N
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N
N
N
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N
N
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N
N
N
MARKER
!
DELAY
to
automatically
add
or
subtract
enough
line
length
to
the
receiver
input
to compensate
for the
phase
slope
at
the
active
marker
position.
This
eectively
attens
the phase
trace around
the
active
marker
.
Y
ou
can
use
this
to
measure
the
electrical
length
or deviation
from
linear
phase
.
A
dditional electrical
delay
adjustments
are
required
on
devices
without
constant
group
delay
over
the measured
frequency
span.
Figure 2-18.
Example
of
Setting
the
Electrical
Delay
Using
a
Marker
Setting
the
CW Frequency
1.
T
o
place
a
marker
at
the
desired
CW frequency
, press:
4
MARKER
5
and
either
turn
the
front
panel
knob or
enter the
value,
followed by
4
x1
5
FRE
2.
Press 4
SEQ
5
N
N
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N
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N
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N
N
NN
N
N
N
N
N
N
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N
N
N
N
NN
N
N
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N
N
N
N
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N
NN
N
N
N
SPECIAL FUNCTIONS
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
MKR ! CW .
You can use this function to set the marker to a gain peak in an amplier
. After pressing
NNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNN
MKR ! CW FREQ
,
activate a CW frequency power sweep to look at the gain compression with
increasing input power
.
Making Measurements 2-21