HP 8753D - Page 161

Figure
3-28.
Connections
for
a
Response
Calibration
6.
P
erform
a
response
calibration
by
pressing
4
CAL
5
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CALIBRATE
MENU
N
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RESPONSE
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THRU
7.
Make
the
connections
as
shown
in
Figure 3-29
.
Figure
3-29.
Connections
for
a
Mixer
RF
F
eedthrough
Measurement
8.
Connect
the
external
LO
source
to
the
mixer's
LO port.
9.
The
measurement
results
show
the
mixer's
RF
feedthrough.
Note
Y
ou
may
see
spurious
responses
on
the analyzer
trace
due
to
interference
caused by LO to IF leakage in the mixer
.
This can be reduced with averaging or
by reducing the IF bandwidth.
3-36 Making Mixer Measurements