NA (Network Analyzer) Mode 49
Output Power
Set the power level out of the FieldFox to High, Low, or manually set power level
to a value between High and Low. Generally, the high power (default) setting is
most 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 set to High or Low in
NA Mode, it is changed to the same value in CAT Mode. Manual settings in NA
Mode are changed to a Low setting in CAT Mode.
How to set Output Power
Press Meas Setup 4.
Then Output Power
o High Sets output power to the maximum achievable power at all displayed
frequencies. Output power is NOT FLAT across the displayed FieldFox
frequency span. Please see the FieldFox Specifications on page 204 for
expected power levels.
o Low Sets output power to approximately –45 dBm, FLAT across the
displayed FieldFox frequency span.
o Man Set output power to an arbitrary value, FLAT across the displayed
FieldFox frequency span. If flattened power can NOT be achieved, a warning
message and beep occurs. To achieve a flattened output power, reduce the
power level or stop frequency.
o Then press Power Level
o Then enter a value using the numeric keypad, the ▲|▼ arrows, or the
rotary knob.
o Press Enter.
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 43.
Learn how to make 75Ω measurements at the FieldFox Supplemental Online
Help: www.agilent.com/find/fieldsfoxsupport
How to set System Impedance
Press Meas Setup 4.
Then Settings.
Then scroll to System Z0 and press Edit
Then type either 50 or 75 and press Enter
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