Agilent Technologies E4428C, Руководство пользователя

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Chapter 2 27
E4438C Vector Signal Generator Overview
Front Panel Overview
4. Amplitude Key
Pressing this hardkey activates the amplitude function.
When active, the following functions also display indicators in the amplitude area:
•Amplitude offset (
OFFS
)
•Amplitude reference mode (
REF
)
•Alternate Amplitude (
∆ = 0.00
dB
)
•User flatness (
UF
)
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 .
6. Menu Keys
These hardkeys access softkey menus enabling configuration of list and step sweeps, utility functions, the
LF output, and various analog and digital modulation types. For detailed information on these keys, 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 instrument settings 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. The
Recall
hardkey recalls a saved instrument state.
Refer to “Saving an Instrument State” on page 71 for more information on the save operation.
8. Recall Key
This hardkey restores any instrument state that you previously saved in a instrument state memory
register.When you load the waveform file from NVWFM into waveform memory (WFM1), and then use the
Recall
softkey to recall the signal generator settings associated with the file.