N5161A/62A/81A/82A/83A MXG Signal Generators User's Guide

Optimizing PerformanceUsing Flatness Correction2. Connect the power meter to the RF output and enter the correction values:With a Power Meter Over LAN, GPIB, or USBManuallyi. Create the correction values:Press More > User Flatness > Do Cal.The signal generator begins the userflatness calibration, and displays a progress bar.The amplitude correction values loadii.automatically into theuser flatness correction array.ii.View the stored amplitude correction values:Press Configure Cal Array.The user flatness correction array title displays User Flatness: (UNSTORED), without a name,indicating that the current user flatness correction array data has not been saved to the filecatalog.Optional: Save the User Flatness Correction Data1. Press Load/Store > Store to File.2. Enter a file name (for this example, FLATCAL1) and press Enter.The user flatness correction array file is now stored in the file catalog as a USERFLAT file. Anyuser flatness correction files saved to the catalog can be recalled, loaded into the correction array,and applied to the RF output to satisfy specific RF output flatness requirements.3. Press Return.Enable the Flatness Correction at the RF Output• Press Return > Flatness Off On.i. Open the User Flatness table editor and highlightthe frequency value in row 1:Press More > User Flatness > Configure Cal Array.The RF output changes to the frequency value ofthe table row containing the cursor.Note the value measured by the power meter.iii. Change the sign on the delta value (e.g. the deltavalue of the 0 dBm reference value (step f), and themeasured value from ii is –.34, change the value to+.34).iv. Highlight the correction value in row 1.v. PressSelect > enter the delta calculated in step iii > dB.(e.g. For this example enter +.34)The signal generator adjusts the output amplitudebased on the correction value entered.vi. Repeat steps ii − v until the power meter reads 0 dBm.vii. Highlight the frequency value in the next row.viii.Repeat steps ii through vii for the remaining rows.The UF annunciator appears in the AMPLITUDE area of the display, and the correction data in thearray is applied to the RF output.Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 97