5. Menu Interpretation
This section provides you with the information on using the front
panel of the spectrum analyzer.
5.1 【FREQ】Frequency
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
f
center
= ( f
stop
+ f
start
) / 2
(5-1)
f
span
=
f
stop
−
f
start
(5-2)
f
center
, f
stop
,
f
s t a r t
and f
span
denotes the center frequency, the stop
frequency, the start frequency and the span respectively.
5.1.1 [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.
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.
5.1.2 [Start Freq]
Sets the start frequency of the sweep. When pressed, the
frequency mode is switched to Start Freq and Stop Freq in order to
enter the desired parameter data.
Key Points:
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