Keysight N9927-90001 User’s Guide 51
CAT (Cable and Antenna Test) Mode
CAT Mode Settings
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
— Press
Meas Setup 4
.
— Then
Power
— Then
Output Power
—
High
(Default setting) 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 549
for expected power levels.
—
Low
Sets output power to approximately –45 dBm, FLAT across the
displayed FieldFox frequency span.
—
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.
— Then press
Power Level
— Then enter a value using the numeric keypad, the
arrows, or the
rotary knob.
— Press
Enter
.
Interference Rejection
Use this setting when you suspect that other signals in the area are interfering
with a measurement. Interference may look like a spike or lack of stability in the
measurement trace. While monitoring a measurement at a specific frequency,
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.
Содержание N9913A
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