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

Optimizing PerformanceUsing External Leveling (N5183A Only)Adjusting the Signal Generator Display’s Amplitude ValueWhen using external leveling, the signal generator’s displayed amplitude value will not match theleveled power of the signal at the output of the coupler/splitter. To compensate for this difference,the signal generator provides two methods for configuring the displayed power value so that it closelymatches the measured value at the output of the coupler/splitter.1. Connect and configure a measurement instrument:a. Connect the output of the coupler/splitter to either a power meter or a signal analyzer.b. Configure the power meter/signal analyzer for measuring the power level of the signal.2. Adjust the signal generator’s displayed amplitude value:• If using the Ext Leveling Amptd Offset Softkey:This softkey uses 16 dB as its zero reference. The 16dB is the coupling factor of the internaldetector.a. On the signal generator, press AMPTD > Leveling Control > Ext Leveling Amptd Offset.b. While viewing the carrier amplitude value on the signal generator display, use the RPGknob (detent knob) to adjust the offset value until the integer part of the displayedamplitude value is the same as the integer portion of the measured value.Each detent position adjusts the value by 1 dB.c. Using the number keypad, make the necessary fractional adjustments to the displayamplitude value.• If using the Amptd Offset Softkey:a. On the signal generator, press AMPTD > Leveling Control > More > Amptd Offset.b. Calculate the difference between the signal generators displayed Amplitude value and themeasured value.c. Using the numeric keypad, enter this difference as the Amptd Offset softkey value.Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 111