Rigol DSA1030, Руководство пользователя

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RIGOL Front Panel Key Reference
2-2 User’s Guide for DSA1000 Series
2.1 Basic Settings
2.1.1 FREQ
Sets the frequency parameters of the analyzer. The analyzer sweeps within a specified
frequency range, and the sweep is restarted every time you change this parameter.
The frequency range of a channel can be expressed by either of two groups of
parameters: Start Frequency and Stop Frequency; or Center Frequency and Span. If
any such parameter is changed, the others would be adjusted automatically in order
to ensure the coupling relationship among them.
2 ) (
start stop center
f f f
+ =
(Equation 2-1)
start stop span
f f f
− =
(Equation 2-2)
center
f
,
stop
f
,
start
f
and
span
f
denotes the center frequency, the stop frequency, the
start frequency and the span respectively.
2.1.1.1 Center Freq
Sets the center frequency of the sweep. When pressed, the frequency mode is
switched to Center Freq and Span in order to enter the desired parameter data. In this
mode, parameters you specified are always shown at the lower right and left side of
the display grid.
Key Points:

The start and stop frequencies vary with the center frequency when the span is
constant.

Changing the center frequency horizontally shifts the current sweep channel and
the adjustment is limited by the specified frequency range.

In Zero Span mode, the start frequency, stop frequency and center frequency are
always equal. If one is changed the others are updated to match.

You can modify this parameter using the numeric keys, knob, or direction keys.
Refer to “Parameter Input” for more details.