UNI-T UTS3000B/A Series User Manual page 25

Figure 3-2 Marker Mode Difference Value△ on the Same Screen to Compare Signal
Note
Turn on the frequency meter to increase the resolution of marker reading.
Use Difference Value△ Marker on the Different Screen to Compare
Signal
With difference value marker function, user can easily measure the difference of amplitude and
frequency between the two signals on the different screen. (This feature is suited for harmonic
distortion measurement.)
In this example, use 10MHz signal to measure the difference in frequency and amplitude between
the two signals, one of the signal is displayed on the screen, another signal is not on the screen.
Difference value△ marker is used to show the differences.
1. Reset the spectrum analyzer:
Press [Default]> Reset
2. Connect 10MHz OUT port on the rear panel to RF IN port on the front panel
3. Set the center frequency, span and reference level for check input signal and other harmonic
wave of 10MHz;
Press [FREQ]>Center Frequency>50MHz
Press [FREQ]>Span>100MHz
Press [AMPT]>Ref Level>20dBm
4. Place a marker at 10MHz peak and set stepped center frequency as the frequency value
（10MHz）of marker:
Press [Peak]>Marker→> CF Step
5. Turn on difference value△ marker function:
Press [Marker]>Marker Mode>Delta △
6. Use center frequency to increase 10MHz:
Press [FREQ]>Center Frequency，
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