HP ESA-L1500A, Руководство пользователя и калибровки

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30 Chapter 2
Getting Started
Front Panel Features
5 CONTROL
functions access menus that allow you to
adjust the resolution bandwidth, adjust the sweep time,
and control the instrument display. They also set other
spectrum analyzer parameters needed for making
measurements.
6 SYSTEM
functions affect the state of the entire
spectrum analyzer. Printer setup and alignment
routines are accessed with the
System
key. The green
Preset
key resets the spectrum analyzer to a known
state.
The
File
key menu allows you to save and load traces,
states, limit-line tables and amplitude correction
factors to or from spectrum analyzer memory.
Print
sends a copy of the screen data to a printer. Use
the
Printer
menu keys under
System
before using the
Print
key. See Chapter 4 for more details.
7 MARKER
functions control the markers, read out
frequencies and amplitudes along the spectrum
analyzer trace, automatically locate the signals of
highest amplitude, and keep a signal in the center of
the screen.
8 EARPHONE
. The
EARPHONE
connector (located behind
the door on the right side of the front panel) provides a
connection for an earphone jack instead of using the
internal speaker.
9 VOLUME
. The
VOLUME
knob can adjust the volume of
the internal speaker. The speaker is turned on and off
with the
Speaker On Off
key in the
Det/Demod
menu.
10 DATA
keys, which include the step keys, knob, and
numeric keypad, allow you to change the numeric value
of an active function.
11 EXT KEYBOARD.
The
EXT KEYBOARD
connector is a
6-pin mini-DIN connector that is compatible with most
PC keyboards. The external keyboard is not included
with the spectrum analyzer. The external keyboard can
be used to enter screen titles and remote commands.
CAUTION
Turn off the spectrum analyzer before connecting an external keyboard
to the spectrum analyzer.
12 PROBE POWER
provides power for high-impedance ac
probes or other accessories.