Specifications

Chapter 3 3-3
User Interface
Front Panel Key Select
Front Panel Key Select
AMPLITUDE Y Scale
Activates the reference level function and accesses the amplitude menu keys only while
the instrument is in Spectrum Analysis mode. Amplitude menu keys allow you to set
functions that affect the way data on the vertical axis is displayed or corrected.
Int Preamp
On Off
Agilent E444xA with Option 1DS and H26 turns the internal preamps on and off. Pressing
Int Preamp (On) results in a correction being applied to compensate for the gain of the 1DS
preamp so that amplitude readings show the value at the input connector. To apply
corrections to the H26 Highband Preamp amplitude readings, corrections are manually
applied and are explained in the section titled “Accessing the Flatness Compensation
Table” on page 3-5. When the preamps are on, a PA indication appears on the left side of
the display.
The lowband preamp is specified to operate over a 1 MHz to 3 GHz frequency range and
the highband preamp is specified to operate from 3 GHz to the upper frequency limit of the
instrument
1
depending on the model. Refer to Figure 1-1, “Lowband vs. Highband
Frequency Diagram for E4440A” on page 1-3.
Key Access:
AMPLITUDE Y Scale > More 1 of 3
1. Refer to Table 1-1 on page 1-2 for other model numbers and frequency ranges.