Creating a User Flatness Array, Example 2

This example shows how to use the synthesizer and a power meter in manual entry mode. This example also introduces two features of the synthesizer. The softkey Freq Follow simplifies the data entry

process and the softkey List Mode sets up a list of arbitrary test frequencies.

The frequency follow feature automatically sets the source to a CW test frequency equivalent to the active correction frequency in the user flatness correction table. The front panel arrow keys are used to move around the correction table and enter frequency-correction pairs. Simultaneously, the synthesizer test frequency is updated to the selected correction frequency without exiting the correction table.

To further simplify the data entry process, the synthesizer allows you to enter correction data into the user flatness correction table by adjusting the front panel knob until the desired power level is displayed on the power meter. The user flatness correction algorithm automatically calculates the appropriate correction and enters it into the table. If you already have a table of correction data prepared, it can be entered directly into the correction table using the front-panel keypad of the synthesizer.

With the list mode feature, you may enter the test frequencies into a table in any order and specify an offset (power) and/or a dwell time for each frequency. When list mode is enabled, the synthesizer steps through the list of frequencies in the order entered.

The user flatness correction feature has the capability of copying and entering the frequency list into the correction table. Since the offset in the list mode table is not active during the user flatness correction data entry process, the value of the correction data is determined as if no offset is entered. When user flatness correction and list mode (with offsets) are enabled, the synthesizer adjusts the output power by an amount equivalent to the sum of the correction data and offset for each test frequency. You must make sure that the resulting power level is still within the ALC range of the synthesizer.

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