Keysight Technologies C Series - Output Power

Keysight N9915-90020 User’s Guide 107
NA (Network Analyzer) Mode
NA Mode Settings
Trigger Slope
Determines which edge of an External trigger signal initiates a sweep.
1. Press Sweep 3
> Trigger > Trig Slope
2. Then choose from the following:
—
Positive Sweep is initiated by the rising edge of signal at about 1.7V.
—
Negative Sweep is initiated by the falling edge of signal at about
1.0V.
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 setting is used when measuring passive, high-loss
devices to place the signal farther from the noise floor. However, for devices
that are sensitive to high power levels such as amplifiers, use the Low power
setting.
For best measurement accuracy, use the Manual power setting at -15 dBm.
After calibration, the power level can be decreased for amplifiers, or increased
for higher dynamic range.
How to set Output Power
1. Press Meas Setup 4
.
2. Then
Output Power
—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 “Specifications/Data
Sheet” on page 869
for expected power levels.
—Low Sets output power to approximately –50 dBm, FLAT across the
displayed FieldFox frequency span.
—Man (default setting at -15 dBm) 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.
a. Then press
Power Level
Power Level settings in this mode will NOT change Power Level settings in
other modes. To help prevent damage to your DUT, use caution when
changing modes with your DUT connected to the FieldFox test ports.