Trace Averaging - UNI-T UTS3000B/A Series User Manual

As the noise level is reduced, the low signal level will become clearer at this point.
Please note that there is a sign"#" at the bottom left of the screen, it presents resolution bandwidth
has no coupling. It's manual adjustment.
Note
User can use up/down direction key with 1-3-10 sequence to change the resolution bandwidth.
RBW lower to 1 kHz is the resolution bandwidth of digital filter, the filter's rectangle coefficient
(specific value of filter 60dB bandwidth and 3dB bandwidth) is 4.5:1. RBW greater or equal to 1 kHz,
the filter's rectangle coefficient is 4.8:1. The maximum value of RBW is 3MHz, the minimum is 1Hz.

Trace Averaging

Trace averaging is a digital process that adds the current value of each trace point to the previous
average and then took the average. Select the averaging, if the spectrum analyzer is automatic coupling,
change the detection mode to sampling mode, it can make the displayed noise level be smooth.
1. Refer to "Reduce Input Loss" in this section and follow the steps to perform it.
2. Turn on average function:
Press [Trace]>Trace Type>Average
3. Set the average count to 20:
Press [Meas/Setup]>Avg|Hold Number>20>
As the averaging to make trace become smooth, so the low signal can be more clear (as shown in
Figure 3-14).
Figure 3-13 Reduce Resolution Bandwidth
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