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denominator is. In RF measurement, if the power, customary milliwatt (mW) as
a unit, 1mW as the denominator, corresponding to the logarithm is dBmW,
referred to as dBm. 1nW power, can be expressed as -60dBm. if 1 pixel on
behalf of 1dB, then 60 pixels will be 60dB, to be able to the two large disparity
in the signal displayed in a spectrum chart.
An amplitude value expressed in logarithms is often called a level value.
The instrument can also display linear amplitude by selecting linear units
in the "Units" menu under "Configuration" of the spectrum analyzer.
3.1.3 Frequency setting
The CENT(or RF/CF) button is used to set central frequency, and the SPAN
button is used to set the sweeping width.
When the RF/CF button is pressed, a frequency setting menu appears,
containing four options: CENT, SPAN, START and STOP. After selecting, you
can enter the value directly, or you can fine tune it with the knob.
The SPAN setting menu appears after SPAN button is pressed, which
contains options of Full SPAN, Last SPAN, Step Set and ZeroSpan.
The Full SPAN on KC908 is different from conventional spectrometers. In
the conventional manner, the machine would scan the full frequency span,
which is predictably from 0 to the upper frequency limit. Yet, KC908 would not
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