Firmware V 1.0 / © 2005-2013 by Aaronia AG, D-54597 Euscheid, www.aaronia.com
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There are TWO ways to set the frequency range manually:
- Center (Center frequency) and Span (Frequency range width)
or
- fLow & fHigh (Start and stop frequency)
7.2 Center (Center frequency)
Chooses the frequency displayed in the middle of the readout. When changing
the Center frequency, the SPAN parameter (see following description) is pre-
served. That way you can quickly evaluate different frequency ranges with
identical SPAN and without tedious re-adjustment of Start/Stop frequencies.
7.3 Span (Frequency range width)
Span adjusts the width of the sweep. Changes are relative to the before men-
tioned “Center frequency” of the display. By changing Span, the Start/Stop fre-
quency (see following description) is automatically adjusted to be able to con-
form to the Span. Therefore the Span function can be compared to a “magnify-
ing glass”, though only operating in the X axis.
EXAMPLE: You have chosen 2kHz as the Center frequency. Now choose
2kHz as Span, and it will be sweeped from 1 to 3kHz. Choose 3kHz as Span
and the sweep will be performed from 0,5 to 3,5kHz etc. In other words, you
always increase or decrease the resolution, centered around the Center fre-
quency.
HINT: The right/left arrow keys can be used to move the sweep range directly
one SPAN unit to the right or left.
For best level-results you should choose the Span not bigger then 20 times the
RBW size (e.g. 1kHz RBW = maximum 20kHz Span).
SPAN
Center Frequency
7.0 The main menu
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