182 Chapter 2
Front-Panel Key Reference
Source
The available power-sweep range is a function of the source attenuator
setting. For your instrument’s available power sweep range refer to the
appropriate Specifications Guide for your analyzer.
The output power of the tracking generator is swept according to the
sweep rate of the analyzer. The output power is always swept from the
source power setting to a higher power setting (negative source power
sweep values are not allowed).
Power-sweep measurements are particularly useful in making gain
compression measurements or output power versus frequency
measurements.
Key Access:
Source
Attenuation
Auto Man
Allows you to select between automatic and manual adjustment of the
tracking generator’s output attenuator. The Agilent E4401B and
E4411B can be manually adjusted from 0 to 60 dB in 10 dB steps. All
other Agilent ESA analyzers can be manually adjusted from 0 to 56 dB
in 8 dB steps. When auto-coupled, the attenuation function
automatically adjusts the attenuator to yield the source amplitude level
specified by the
Amplitude On Off softkey function. For the Agilent
E4401B and E4411B, press
Attenuation (Man) for power sweeps greater
than 10 dB.
Key Access:
Source
CAUTION When the source attenuation is set manually, the actual source
amplitude may be greater than the amplitude indicated by the source
amplitude. With source attenuation set to manual, source amplitude is
permitted to be set to values beyond output levels to accommodate the
full range of the analyzer capabilities. As a result, exercise caution
when connecting a power-level sensitive device to the tracking
generator output
Amptd Step
Auto Man
Allows you to set the step size of the power level range of the tracking
generator. The default setting is one vertical scale division when in a
logarithmic amplitude scale.
Key Access:
Source
Amptd Offset
Offsets the displayed power of the tracking generator. Using the
amplitude offset capability of the tracking generator allows you to take
system losses or gains into account, thereby displaying the actual power
delivered to the device under test.
Key Access:
Source
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