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

Optimizing PerformanceUsing External Leveling (N5183A Only)Figure 5-21 Typical Diode Detector Response at 25° COption 1E1 Output Attenuator Behavior and UseWhen using the internal detector, the Option 1E1 output attenuator enables signal generator powerlevels down to −135 dBm at the RF Output connector. It accomplishes this by adding attenuation tothe output signal after the ALC detection circuit. The output power value (shown in the Amplitudearea of the display) is the resultant of the Set Atten and Set ALC Level values (see page 104). With theexternal detector selected, the output attenuator no longer attenuates the output signal since theAgilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide 107