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Defines and controls the VNA source power and attenuation for the active channel.
External sources can be controlled from this dialog. Learn more.
Power On (All Channels) - also same function as RF Power. Check to enable source power for all channels. Only turns power ON if channel power setting is ON or Auto.
Port Powers Coupled
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Coupled (checked) - The power levels are the same at each test port. Set power at any test port and all test ports change to the same power level.
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Uncoupled (cleared) - The power levels are set independently for each test port. Uncouple power, for example, if you want to measure the gain and reverse-isolation of a high-gain amplifier. The power required for the input port of the amplifier is much lower than the power required for the output port. A power sweep can also be performed with uncoupled power.
Name - Lists the VNA test ports.
State
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Auto - Source power is turned ON at the specified test port when required by the measurement. This is the most common (default) setting. See also Power ON and OFF during Save/Recall, User Preset and Preset.
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ON - Source power is ALWAYS ON, regardless of measurements that are in process. Use this setting to supply source power to a DUT port that always requires power, such as an LO port. This could turn OFF power at another test port.
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OFF - Source power is never ON, regardless of the measurement requirements. Use this setting to prevent damage to a sensitive DUT test port.
Port Power - Sets the power level at the output of the source.
- Available ONLY when sweep type is set to Power Sweep. Set the start and stop power values of a power sweep. Learn more about Power Sweep.
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You can specify whether to maintain source power at either the start power or stop power level at the end of a power sweep. Learn more about Power Level.
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A power sweep can be performed with uncoupled power. Different power ranges can be swept in the forward and reverse directions.
(ALC Hardware in Softkey)
Channel Power Slope - Helps compensate for cable and test fixture power losses at increased frequency. With power slope enabled, the port output power increases (enter positive value) or decreases (enter negative value) as the sweep frequency increases.
Slope - Select to set the power slope. Clear to set power slope OFF.
Power slope is computed and applied from 0 GHz – not from the measurement start frequency. For example, with the following measurement settings:
The power into the DUT from 1 GHz to 2 GHz is 1 dBm sloping to 2 dBm.
Offset and Limits - Launches the Power Offset and Limits dialog.
Receiver Leveling - Launches the Receiver Leveling dialog.
Receiver Attenuator - Launches the Receiver Attenuator dialog.
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