Keysight N9923A, Руководство пользователя, Страница: 165 / 276

Keysight N9923-90001 User’s Guide 165
VVM (Vector Voltmeter) Mode - Option 308
VVM Mode Settings
This setting survives a Preset and Mode Preset.
How to set Resolution
— Press Scale/Amptd
— Then
Resolution
— Then choose:
—
1
0.0 (default)
—
2
0.00
IF Bandwidth
Reducing the IF receiver bandwidth reduces the effect of random noise on a
measurement. However, narrower IF bandwidths cause longer measurement
times.
For highest accuracy, Zero AFTER changing the IF Bandwidth. Learn more in
“Zeroing” on page 167
.
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 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
.
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.