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Spectrum Analyzer Software Reference
4.1.1 Frequency
In the RF Settings tab, first select the frequency range (one of the three supported ranges), then specify
the center frequency and span to measure (see Figure 7).
Figure 7. RF Settings Tab, Frequency
This can be done either with Center frequency (for example, 312 MHz) and Span (for example, 2 MHz) or
the equivalent Start (for example, 311 MHz) and Stop (for example, 313 MHz). Both result in the same
output: a spectrum from 311 MHz to 313 MHz.
4.1.2 Amplitude
Select the Reference Level (RefLvL) accordingly to the expected input level (see Figure 8). The reference
level sets the maximum power level that can be measured without saturating the measurement device. If a
power level higher than the reference level is applied, the measurement result contains signal artifacts
(power) close to the input signal frequency.
Figure 8. RF Settings Tab, Amplitude / Reference Level
If signal strength is not known, it is a good idea to start with a low reference level and increase it if high
readings or artifacts are seen.
NOTE: In saturation, the Spectrum Analyzer shows incorrect results but is not damaged unless the
absolute maximum input level of +0 dBm is exceeded.
4.1.3 Sweep
In Continuous Sweep mode, each measurement result is displayed and a new measurement is triggered,
resulting in continuous updates. In single mode, only one measurement is taken when the Start button is
pressed. To take another measurement in single sweep mode, press the Start button again (see Figure 9).
Figure 9. RF Settings Tab, Sweep / Measure
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SLAU371A September 2011 Revised November 2011 Spectrum Analyzer (MSP-SA430-SUB1GHZ)
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