UNI-T UTS3000B/A Series User Manual page 26

At this point, the first marker moves to the left side of the screen which is located at the first
signal peak（10MHz）. Until the center frequency becomes 100MHz, frequency of △Mkr1 is
90MHz, which is marker 100MHz harmonic component. The annotation of △Mkr1 will show the
amplitude and frequency difference of 10MHz signal peak and 100MHz signal peak.
Figure 3-3 Difference Value Marker of Reference Signal Out of Screen
7. Turn off Marker: Press [Marker]>All Markers Off or [Marker]>Marker Mode>Close
Distinguish Signals of the Same Amplitude
This example shows that reduce the resolution bandwidth and video bandwidth to distinguish the
two signals with the same amplitude, frequency space 100 kHz.
Please note that for resolution signal, the final selected resolution bandwidth value is equal to the
frequency difference between the two input signals, while the video bandwidth is slightly narrower
than the resolution bandwidth.
Figure 3-4: Instrument Setting for Acquire Two Channel's Signal
1. As shown in Figure 3-4, connect two signal sources to RF IN port via directional coupler.
2. Set the frequency of one of signal source to 300MHz and the frequency of another signal source to
300.1MHz, amplitude of the two signal sources to -20dBm, and turn on the signal output.
3. Set the spectrum analyzer to observe signal:
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