Agilent Technologies FieldFox N9923A User Manual page 29

Output Power
Set the power level out of the FieldFox to either High power or Low power.
Generally, the high power level (default setting) is more accurate because the
receivers are measuring farther from the noise floor. However, some devices are
sensitive to high power levels. Use the Low power setting when measuring
amplifiers.
NOTE To help prevent damage to your DUT, when Output Power is changed in NA
Mode, it is changed to the same value in CAT Mode.
How to set Output Power
 Press Meas Setup 4.
 Then
Interference Rejection
Use this setting when you suspect that other signals in the area are interfering
with a measurement. This may look like a spike or lack of stability in the
measurement trace. While monitoring a measurement at a specific frequency,
toggle this setting between ON and OFF. If the measurement result decreases
while ON, then there is an interfering signal in the area. Continue to make
measurements with Interference Rejection ON. However, this will slow the
measurement speed.
Once enabled, up to SIX sweeps may be required before the interfering signal is
neutralized.
This setting can be changed at any time without affecting calibration accuracy.
How to set Interference Rejection
 Press Meas Setup 4.
 Then
 Then scroll to Interference Rej and press
 Then press
 Press
System Impedance (Z0)
To accurately view data presented in Smith Chart format, first set the System
Impedance. Learn how to select Smith Chart format on page 23.
NA (Network Analyzer) Mode
Output Power High
High Sets output power to approximately +6 dBm.
o
Low Sets output power to approximately –40 dBm.
o
Settings
Interference Rej [current setting]
following:
No interference rejection and fastest possible sweep speed.
Off
o
The lowest level of Interference rejection.
Minimum
o
The medium level of Interference rejection.
Medium
o
The highest level of Interference rejection.
Maximum
o
Done Edit
Low.
Edit
repeatedly to choose from the
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