Chapter 1 7
E4428C Analog Signal Generator Overview
Front Panel Overview
3. Frequency Key
Pressing this hardkey makes frequency the active function. You can change the RF output frequency or use
the menus to configure frequency attributes such as frequency multiplier, offset, and reference.
4. Amplitude Key
Pressing this hardkey activates the amplitude function. You can change the RF output amplitude or use the
menus to configure amplitude attributes such as power search, user flatness, and ALC BW.
5. Knob
Rotating the knob increases or decreases a numeric value or changes a highlighted digit or character. You
can also use the knob to step through lists or select items in a row. The knob uses the
Incr Set value in
conjunction with the knob ratio (set with the
Step/Knob Ratio softkey) to determine how much each turn of
the knob changes the active function value. For example, if the
Incr Set value for the active function is 10 dB
and the knob ratio is 50 to 1, then each turn of the knob changes the active function by 0.2 dB (1/50th of
10 dB). By modifying either value or both, you change the amount for each turn of the knob. For more
information on softkeys, refer to the E4428C/38C ESG Signal Generators Key and Data Field Reference.
7. Save Key
This hardkey accesses a menu of softkeys enabling you to save data to the signal generator’s instrument state
memory register. The instrument state register is a section of memory divided into 10 sequences numbered 0
through 9. Each sequence contains 100 registers numbered 00 through 99.
The
Save hardkey provides a quick alternative to reconfiguring the signal generator via the front panel or
with SCPI commands when switching between different configurations. The
Recall hardkey recalls a saved
instrument state.
Refer to “Saving an Instrument State” on page 71 for more information on the save operation.
7. Menu Keys
These hardkeys access softkey menus enabling configuration of list and step sweeps, utility functions, the
LF output, and various analog modulation types. For detailed information on these keys, refer to the
E4428C/38C ESG Signal Generators Key and Data Field Reference.
8. Recall Key
This hardkey restores any instrument state that you previously saved in a instrument state memory register.
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