R3132 Series Spectrum Analyzer Operation Manual
2.2.10 Input Saturation
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Setting the measurement conditions
This changes the analyzer settings so that the input signal is displayed more clearly.
6.
Press FREQ, 1, 0, 0 and MHz.
A center frequency of 100 MHz is set.
7.
Press SPAN, 1 and MHz.
A frequency span of 1 MHz is set.
8.
Press LEVEL, ATT AUTO/MNL(MNL), 0 and GHz(dB).
The Attenuator level is set to 0 dB.
Under these conditions, the input level at the mixer is -16 dBm (-16 dBm -0dB),
and the measurement is correct without saturation.
Figure 2-34 Screen Display without Saturation
Changing the input signal level
Saturation can be observed as the left side signal level is increased.
9.
Set SG1 level to +10 dBm.
Under these conditions, the input level for the mixer is +4 dBm (= +4 dBm -0dB),
and the right hand signal level is reduced due to saturation caused by gain com-
pression.