Chapter 6 6-65
Front-Panel Key Reference
Preset
Preset
Provides a convenient starting point for making most measurements.
You can select whether a factory preset or user preset is performed. The
default is factory preset, which will always set the analyzer to the same
state for a given model number. The user preset is user-defined using
the
Save User Preset function (System, Power On/Preset). The Preset
selection (
Factory or User) can be set by pressing System, Power
On/Preset, and toggling the Preset menu key until the desired selection
is underlined.
If Factory Preset is selected:
Pressing the
Preset front-panel key performs a factory preset, which
resets the analyzer to Spectrum Analyzer (SA) mode, brings up the
frequency menu and sets certain conditions to their default values. The
factory preset function performs a processor test, but does not affect
alignment data.
Factory Preset clears both the input and output buffers,
but does not clear trace 2. Amplitude-correction factors are turned off,
but remain in analyzer memory. Limit line testing is turned off, but the
limit line tables remain in analyzer memory. Segmented sweep is
turned off, but the segmented sweep tables remain in analyzer memory.
The status byte is set to 0. See Table 6-1 on page 6-66 for the conditions
established by performing a factory preset.
NOTE Input coupling is set to AC by a factory preset. For Agilent E4402B with
Option UKB, E4404B and E4405B only, you can specify alternating
current (AC) or direct current (DC) coupling at the analyzer input.
Selecting AC coupling blocks any DC voltage at the analyzer input, but
also decreases the frequency range of the analyzer. Make sure the
instrument is DC coupled when measuring below 100 kHz. (See
“Input/Output” in this chapter for more information on this setting.)
If
User Preset is selected:
Pressing the
Preset hardkey brings up the Factory Preset and User
Preset menu keys. If Factory Preset is pressed, a factory preset will be
performed as described above. If
User Preset is pressed, the user preset
state is recalled. To set the user preset state, change the analyzer
settings as desired, then press
System, Power On/Preset, Save User
Preset.
NOTE Recalling any state, including the user preset state, will affect the
conditions of more parameters than are affected by a factory preset. For
example, external preamp gain and input impedance correction are not
affected by a factory preset but may be affected by a user preset.
To Next Page
Need help?
General
