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V1.0
07/01/22
Newark.com/multicomp-pro
Farnell.com/multicomp-pro
sg.element14.com/b/multicomp-pro
5.1.5 [Freq Offset]
You can set a frequency offset to displayed frequency value, including freq marker value. This movement won’t influence
sweep frequency range.
While this function activated (frequency offset isn’t 0), you can modify this parameter using the numeric keys, knob or
direction keys. `
5.1.6 [Freq Ref Int Ext]
Set the reference frequency as internal or external input, this is regarded as whole device reference.
5.2 [SPAN]
Set the spectrum analyzer to span mode. When press [SPAN], [Span], [Full Span], [Zero Span] and [Last Span] will be
available to configure. 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]
Sets 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 modulated signal) at time domain.
5.2.4 [Last Span]
Changes the span to the previous span setting.
5.3 [AMPTD] Amplitude
Sets the amplitude parameters of the analyzer. Through these parameters, signals under measurement can be displayed at
an optimal view with minimum error. The pop out amplitude menu includes [Ref Level], [Attenuation Auto Manual], [Scale/Div],
[Scale Type Lin Log], [Ref Offset], [Ref Unit], and [Preamplifier On Off].
5.3.1 [Ref Level]
Activate reference level function and sets the maximum power or voltage for display window.
Key points:
• This value is affected by a combination of maximum mixing level, input attenuation, and preamplifier. When you adjust it,
the input attenuation is adjusted under a constant max mixing level, meeting:
(5-3)
denotes the reference level, the input attenuation, the preamplifier, and the
max mixing level, respectively.
•
You can modify this parameter using the numeric keys, knob, or direction keys.
