114 Keysight EXG and MXG X-Series Signal Generators User’s Guide
Optimizing Performance for All Models
Using External Leveling (N5173B/83B Only)
Using External Leveling (N5173B/83B Only)
External leveling lets you move the ALC feedback source closer to the device under test (DUT) so
that it accounts for most of the power uncertainties inherent to the cabling and components in a
test setup. Refer to Figure 5-19.
While operating in external leveling mode, if either the RF or the DC
connection between the signal generator and the detector is broken,
maximum signal generator power can occur. This maximum power may
overstress a power–sensitive device under test.
Atten Hold sets to On and grays out (inactive) with Ext Detector selection. When re–
selecting Internal, the softkey becomes active, but attenuator hold remains on. If
desired, manually set it to off.
With the Ext Detector selection, Set Atten has no effect on the output power level.
During external detector use, use the attenuator to keep the ALC power level at
approximately 0 dBm when using negative dBm power levels. See page117.
These settings do not
change the output power
amplitude of the signal
generator, they only let
you modify the front panel
display amplitude value so
it closely approximates the
power level measured at
the output of the
coupler/splitter. See
page120.
This softkey works with only the Ext Detector selection. It uses 16 dB as its zero
reference point.
See page page86.
Opens a menu in which you can specify the manner in which power is set.
Power setting can be optimized for different parameters.
Select Optimize S/N to maximize the signal to noise performance in the
resulting signal.
Select Optimize Harmonics to minimize the amplitude of harmonics in the
resulting signal.
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