Saluki S3531 series, Руководство пользователя

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Then the 2 signals are clearly shown in screen as shown in figure below
Fig 5-4: 100Hz RBW Trace
5.3.2 Resolving Signals of Different Amplitudes
To resolve two signals of different amplitudes, the resolution bandwidth must be equal to or less than the frequency interval of
the two signals (same as resolving two signals of equal amplitude). But the maximum resolution bandwidth for resolving two
signals with different amplitudes mainly depends on the squareness factor of IF filters other than the bandwidth 3dB.
Squareness factor is defined as the ratio of 60dB bandwidth to 3dB bandwidth of the intermediate frequency filter, as shown in
Figure below.
Figure 5-5 Schematic of Bandwidth and Squareness Factor
Example
Take resolving two signals of different amplitudes with frequency difference of 50 kHz and amplitude drop of 40dB as an example
to explain the testing steps:
1)
As shown in Figure 5-5, connect the outputs of two signal generators to the spectrum analyzer input.
2) Set the frequency of one signal generator to 1800MHz and amplitude to -10dBm. Set the frequency of the other signal
generator to 1800.05MHz and signal output amplitude to -50dBm. Turn on the RF outputs of the two signal generators.