Saluki S5105 Series, Руководство пользователя

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84
【
Frep
】
, [Span] , 500 [kHz] ;
Press
【
BW
】
, [RBW Auto Man], 30 [kHz] .
d) Set the reference level of the microwave analyzer to the power level of large signal 0dBm:
Press
【
Amplitude
】
and enter 0 [dBm] .
The rectangular factor of resolution bandwidth filter of the S5105D/E/F microwave analyzer is about 4:1.
At a resolution bandwidth of 30kHz, the 60dB point is 123kHz, and the half bandwidth is 61.5kHz, which is
larger than the 50kHz frequency spacing. Therefore, it is impossible to resolve two input signals, as
shown in Figure 5-12.
Figure 5-12 Test at 30kHz Resolution Bandwidth setting
e) Reduce the resolution bandwidth and observe the covered small signal:
Press
【
BW
】
, [RBW Auto Man] , 1 [kHz] .
At this time, the half bandwidth is 2.05 kHz, which is less than the frequency spacing of 50 kHz, so it is
possible to resolve two input signals, which clearly display two signals on the screen.
f)
Read the frequency difference and amplitude difference of the signal with the marker:
Press [Peak] to place the marker on the peak of the large signal;
Press
【
Mkr
】
, [Delta Mkr] to activate the
△
marker;
Press [Peak], [Sub Peak] to place the
△
marker on the peak of the small signal.
This can read the frequency difference and amplitude difference between the two unequal amplitude
signals, as shown in Figure 5-13.