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120 Keysight EXG and MXG X-Series Signal Generators User’s Guide

Optimizing Performance for All Models

Using External Leveling (N5173B/83B Only)

To remove the error message, press the down arrow key until the message is gone. The

error appears when an attempt is made to increase the amplitude beyond the maximum

value as it relates to the current attenuator setting.

Adjusting the Signal Generator Display’s Amplitude Value

When using external leveling, the signal generator’s displayed amplitude value will not match the

leveled 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

closely matches 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 internal

detector.

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 RPG

knob (detent knob) to adjust the offset value until the integer part of the displayed

amplitude 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 display

amplitude value.

— If using the Amptd Offset Softkey:

a. On the signal generator, press AMPTD > More > Amptd Offset.

b. Calculate the difference between the signal generators displayed Amplitude value and

the measured value.

c. Using the numeric keypad, enter this difference as the Amptd Offset softkey value.

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