Keysight N9340B Demo Manual page 8

Section 3
Measurement Basics: Frequency, Span, Amplitude
The key measurement setup parameters of a spectrum analyzer are:
– Frequency: Adjusts the frequency.
– Span: Adjusts the difference between the start and stop
frequencies of the displayed spectrum.
– Amplitude: Adjusts the view of the signal level.
A typical spectrum analyzer measurement procedure contains the following
three steps:
1. First, the center frequency of the analyzer is tuned to the signal of interest.
2. Next, the span is adjusted to zoom in on the signal of interest.
3. Finally, the amplitude is adjusted to give the optimum view of the signal.
In this section, you will set an external signal generator to 100 MHz at –10 dBm
and connect an RF cable from its output port to the input port of the N9340B.
Software
If you do not have a signal generator, you can connect an antenna to the input
port of the N9340B and perform this demonstration using an ambient signal
such as from a local radio station. In this case you may need to jump ahead
to Section 6 to learn how to lower the noise floor by reducing the resolution
bandwidth (RBW).
Instruction
Connect a Type-N RF cable from an external
signal generator's RF output port to the RF
input connector of the N9340B.
Tune the center frequency to 100 MHz.
Adjust the span to zoom in on the signal on
the screen.
Set the reference level so that the signal peak
is at the top graticule line.
8
Key strokes
[FREQ], [100], {MHz}
[Span], [10], {MHz}
[AMPTD], then rotate the knob.