HP ESA-L1500A, Руководство пользователя и калибровки

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Chapter 2 39
Getting Started
Key Overview
Key Overview
The keys labeled
Frequency
,
System
, and
Marker
are all examples of
front panel keys. Pressing most front panel keys accesses menus of
functions that are displayed along the right side of the display. These
are called menu keys.
Menu keys list functions other than those accessed directly by the front
panel keys. To activate a menu key function, press the key immediately
to the right of the annotation on the screen. The menu keys that are
displayed depend on which front panel key is pressed and which menu
level is enabled.
If a menu key function’s value can be changed, it is called an active
function. The function label of the active function appears in inverse
video after that key has been selected. For example, press
Amplitude
.
This calls up the menu of related amplitude functions. Note the
function labeled
Ref Level
(the default selected key in the Amplitude
menu) appears in inverse video.
Ref Level
also appears in the active
function block, indicating that it is the active amplitude function and
can now be changed using any of the data entry controls.
A menu key with On and Off in its label can be used to turn the menu
key’s function on or off. To turn the function on, press the menu key so
that On is underlined. To turn the function off, press the menu key so
that Off is underlined. In the manual, when On should be underlined, it
will be indicated as:
Video Average On Off
(On).
A function with Auto and Man in the label can either be auto-coupled or
have its value manually changed. The function’s value can be changed
manually by pressing the menu key until Man is underlined, and then
changing its value with the numeric keypad, knob, or step keys. To
auto-couple a function, press the menu key so that Auto is underlined.
In the manual, when
Auto
should be underlined, it will be indicated as:
Attenuation Auto Man
(Auto).
In some menus of keys, one key label will always be underlined to show
which key has been selected. For example, when you press the
Mkr
Readout
key (a Marker menu key) it will bring up its own menu of keys.
The
Frequency
key, which is the default selected key, will be underlined.
When you press another Mkr Readout menu key, the underline will
move to that key to show it has been selected.
A summary of all front panel keys and their related menu keys can be
found in
Chapter 4, “Front-Panel Key Reference.”