Agilent Technologies ENA Series User Manual page 321

for each port. The use of the
this way, the offset value is automatically retained even if you have changed the setting
range of the basic frequency, since the correlation of the frequencies among ports is
defined as a formula. Using
from the specified frequency and the normal frequency, while maintaining the preset D.
Procedures for enabling frequency-offset function
Follow the steps below to enable the frequency-offset function.
Step 1. Press
is to be set.
Step 2. Press
Step 3. Press
Keep in mind the following when you turn
NOTE
• If
Swept
• The phase information of the measurement value becomes meaningless. Therefore, the
view of
Positive Phase
other function in the
without phase information, including the parameter conversion function, will not
operate correctly.
•
Fixture Simulator
• If the measured frequency exceeds the measurable range (300 kHz to 3 GHz, or 8.5
GHz), an error will occur during the measurement.
Step 4. Once the frequency-offset function is enabled, the frequencies (Figure 8-2) set at each port
are displayed for each measured trace in the lower part of the screen.
Figure 8-2 Frequency-offset sweep
If the frequency-offset function is turned
NOTE
will increase. For example, you can use two sweeps to measure the S-parameters of a
2-port setup in a normal frequency sweep; however, four sweeps are needed when the
frequency-offset function is turned
have the same frequency setting.
Chapter 8
Multiplier
/
Start Stop
(or
-
Frequency Offset
to enable the frequency-offset function (ON).
Frequency Offset
is selected for the
Swept Sweep Mode
to , and from
Std Stepped
, ,
Phase Group Delay Smith
specified with the
Conversion
and
Time Domain
Frequency-Offset Measurement (Option 008)
/ / key is recommended as a rule. In
Divisor Offset
key will set M and O, which can be determined
) to activate the channel on which the frequency-offset
to display "Frequency Offset Menu."
the frequency-offset function:
ON
, it will be changed to
to
Fast Swept Fast Stepped
, ,
Polar, Real Imaginary
key has no actual meaning. In addition, any
menu of the key that cannot be calculated
( , ) are changed to
Transform Gating
, the number of sweeps during measurement
ON
. This holds true regardless of whether the ports
ON
Measurement of Mixers
(from
Stepped Std
).
, or
Expand Phase
.
OFF
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