130 N9912A FieldFox User’s Guide
Display Resolution
You can display either one digit or two digits after the decimal point for both
magnitude and phase readings.
This setting survives a Preset and Mode Preset.
How to set Resolution
Press Scale/Amptd
Then Resolution
Then choose from:
o 1 0.0 (default)
o 2 0.00
IF Bandwidth
Reducing the IF receiver bandwidth reduces the effect of random noise on a
measurement. However, narrower IF bandwidths also cause longer measurement
times.
For highest accuracy, perform calibration and Zero AFTER changing the IF
Bandwidth. Learn about Zeroing on page 131.
How to set IF BW
Press BW 2.
Then IF BW
Then choose from the following: 300 Hz | 1 kHz | 3 kHz | 10 kHz | 30 kHz
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.
How to set Output Power
Press Meas Setup 4 then More
Then Output Power
Then choose from the following. The underlined value is the current setting.
o High Sets output power to the maximum achievable power at the selected
frequency.
o Low Sets output power to approximately –45 dBm.
Averaging
Averaging helps to reduce the effects of random noise on a measurement. The
FieldFox computes the displayed value over several consecutive readings.
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