Other topics about Optimizing Measurements
Receiver leveling is used for accurate power adjustment of E5072A. Receiver leveling can be used to:
Adjust the source power level across a frequency or power sweep using its receiver measurements
Eliminate short-term drift of a booster amplifier
Achieve greater source power level accuracy with faster throughput compared to conventional method of using a power meter and power sensor
Before a measurement sweep, the E5072A makes an internal sweep (pre-sweep) to measure the absolute power level on the port before adjusting the source power level across a frequency.
When performing receiver leveling, power is measured across a frequency and adjusted until all stimulus data point are within the Tolerance or the Max Iteration has been met.
To turn ON receiver leveling, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Leveling > ON
Sets the power offset for the source port.
To set the power offset, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Power Offset
Enter the power offset value for receiver leveling.
This power offset setting is the same as the power offset set in power calibration, Cal > Power Calibration > Power Offset. Hence, the power offset set here is reflected in power calibration and vice versa.
The source is considered leveled when each stimulus data point has achieved the target power level within this tolerance value.
To set the tolerance, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Tolerance
Enter the tolerance value for receiver leveling.
Sets the maximum number of measurement sweeps to take for iterating the receiver leveling power. If stimulus data points do not achieve the target leveling power after the maximum number of iterations, the measurement sweep occurs using the correction values obtained from the last leveling sweep.
To set the max iterations, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Max Iteration
Enter the max iteration value for receiver leveling.
Increase the Max Iteration, reduce the IFBW (Avg > IF Bandwidth) or increase the Tolerance setting when the message "Not settled, noisy trace" appears.
When fast mode is ON, pre-sweep is performed using Fast IFBW.
To turn ON fast mode, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Fast Mode > ON
Sets the IFBW for pre-sweep when Fast Mode is ON.
To set the Fast IFBW, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Fast IFBW
Enter the fast IFBW value for receiver leveling.
Fast IFBW should be set wider than the normal IFBW (Avg > IF Bandwidth)
Safe mode is necessary to protect the E5072A when connecting with external components with large variations in frequency response. When safe mode is turned ON, the source power will be changed according to the settings of Max Power Step, Max Port Power and Min Port Power.
Sets the change in source power at each stimulus data point from one sweep to the next.
To set the max power step, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Max Power Step
Enter the max power step value for receiver leveling.
Sets the maximum power allowed to the selected port from the source. Only absolute power is saturated.
To set the max port power, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Max Port Power
Enter the max port power value for receiver leveling.
The message "Not settled, noisy trace" appears when this limit is reached.
Sets the minimum power allowed to the selected port from the source. Only absolute power is saturated.
To set the min port power, follow the steps below:
Press Sweep Setup
Click Power > Receiver Leveling > Port 1|Port 2 > Min Port Power
Enter the min port power value for receiver leveling.
The message "Not settled, noisy trace" appears when this limit is reached.