Agilent Technologies E4406A, Руководство пользователя

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28 Chapter 1
Getting Started
Front Panel Description
8. Marker keys are used to obtain specific information about parts of
the displayed measurement (for example, to identify
the exact frequency of an offset
).
See page 89 for more
detail.
•
Marker
accesses softkeys that allow manual
positioning of markers.
•
Search
automatically performs a peak search, and
accesses softkeys that automatically position
markers at preset locations on the trace (for
example, to determine the difference between the
amplitude of one peak and another).
9. Probe Power The probe power input supplies power for external
probes; the three connectors are a ground, and a +15 V,
and a
−
12.6 V connector. The probe power supplies
power to high frequency probes and accessories, such as
preamplifiers, that are used as accessories to the
transmitter tester. The probe power provides a
maximum of 150 mA.
10. RF Input The 50
Ω
RF input allows for input of an external RF
signal. The connector is a type N female, and is rated
for a maximum input of +35 dBm for measuring a CW
signal, and a maximum of 26 volts for a DC signal.
11. Data Entry keys are used to enter numeric values. Entries made
using data entry keys will be visible in the active
function area (see the section on annotation on
page 33
to locate the active function area).
• The
Enter
key is used to terminate numeric data
where no units of measurement are being entered,
or where you want to terminate with the default unit
of measurement. For operations involving selection
of a unit of measurement (for example, dB, dBm,
Hz, s, degrees, radians), the
Units
softkey menu
(explained below) is used to terminate numeric
entries.
•
Units
softkeys are used to enter units of
measurement. If the value you are entering is in
units of measurement, the units softkey menu will
automatically appear once you enter a digit. After
entering the desired numeric value, you terminate
the entry by pressing the appropriate units of
measurement softkey.