HP 8753D - Page 156

The
measurements setup
diagram is
shown in
Figure
3-22
.
Figure
3-22.
Measurement
Setup
Diagram
Shown
on
Analyzer
Display
11.
T
o
view
the
mixer's
output
power
as a
function of
its input
power,
press:
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
VIEW
MEASURE
12.
T
o
set
up
an
active marker
to
search
for
the
1
dB
compression
point
of
the
mixer
,
press:
4
SCALE
REF
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
AUTO
SCALE
4
MARKER
F
CTN
5
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
MKR
SEARCH
ON
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
SEARCH:MAX
13.
Press:
4
MARKER
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
MKR
ZERO
4
MARKER
F
CTN
5
N
N
N
N
N
N
N
N
N
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
NN
N
MKR
SEARCH
ON
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
TARGET
4
0
1
5
4
x1
5
The
measurement
results show
the mixer's
1dB
compression point.
By
changing
the
target
value
,
you can
easily locate
other compression
points (for
example
,
0.5
dB
,
3
dB).
See
Figure 3-22.
14.
Read
the
compressed
power on
by
turning
marker
1
o.
4
MARKER
5
NNNNNNNNNNNNNNNNNNNN
1MODE
NNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNN
1 MODE OFF
.
Making Mixer Measurements 3-31