5
.Menu Interpretation
31
Set the spectrum analyzer to span mode. When press
【
Span
】
softkey, [Span], [Full Span], [Zero Span] and [Last Span] submenu
will be available along the right side of the display. You can modify
span using the numeric keys, knob or direction keys. Use numeric
key or [Zero Span] to clear span.
5.2.1 [Span]
Sets the frequency range of the sweep. When pressed, the
frequency mode is switched to Center Freq/Span
.
Key points:
The start and stop frequencies are changed with the span
automatically.
In manual span mode, the span can be set down to 0 Hz, that is
zero span mode. And up to the full span described in
"Specification". When it is set to the maximum span, it enters full
span mode.
Modifying the span in non-zero span mode may cause an
automatic change in both CF step and RBW if they were in Auto
mode, and the change of RBW may influence VBW (in Auto
VBW mode).
In non-zero span mode, variation in the span, RBW or VBW
would cause a change in sweep time.
You can modify this parameter using the numeric keys, knob, or
direction keys.
5.2.2 [Full Span]
Set
s the spectrum analyzer to center frequency/sweep mode, and
span of the analyzer to the maximum.
5.2.3 [Zero Span]
Sets the span of the analyzer to 0 Hz. Both the start and stop
frequencies will equal the center frequency and the horizontal axis
will denote time. The analyzer here is measuring the time domain
characteristics of amplitude, located at the corresponding
frequency point. This will help to observe the signal (especially for
