UNI-T UTS3000B/A Series User Manual page 73

The harmonic analysis waveform is displayed as zero-sweep waveform of each harmonic, and all keys
under the [FREQ] menu are blocked.
Press [Meas] >Harmonics to enter the following panel menu.
Meas/Setup:
Avg|Hold Num（On/Off）: Press average time (on) to specify the average number of sweep to
calculating the measurement results. Sweep time range is from 1 to 999. User can change the average
time by using the numeric key, rotary knob, direction key, or touch the panel menu. Measured average
result will be displayed after the sweeping. Select (off) to turn off this measuring average function.
Avg Mode （Exponential/Repeat） : Switch between exponential and repetition average mode. When the
specified average time of sweep is reached, this average mode is used to determine the average
operation mode of the spectrum analyzer.
When the exponential average mode is selected, after a specified average time is reached, each
channel trace data is weighted exponentially, added to the previous average value and then take the
average. In the exponential average mode, the weight of the new data is larger than that of the old data,
which is conducive to track signals that change slowly. Measured average result will be displayed after
the sweeping.
When the repetition average mode is selected, after a specified average time is reached, all the previous
data will be delete and restart the sweeping.
Avg Type: Log-Pwr averaging is to average the logarithmic amplitude values (in dB) of the signal
envelope measured within a signal collection unit, the average detection type will change to video
detection. Power averaging is to average the power of the signal (the square of the amplitude),the
average detection type will change to RMS (power) detection.Voltage averaging is to average the
voltage values of the signal envelope measured in a signal collection unit, the average detection type will
changed to voltage detection, The voltage averaging is still a linear display.
Fundamental: Set the frequency of the measured carrier signal.
User can change the frequency of basic harmonic by using the numeric key, rotary knob, direction key, or
touch the panel menu. By default, other harmonic measurements will be test at multiples of the specified
fundamental frequency.
Harmonics: Set the harmonic time of the measured carrier to calculate the total harmonic. User can
change the harmonic time by using the numeric key, rotary knob, direction key, or touch the panel menu.
Dwell Time: Sets the dwell time for the specified harmonic. In zero-span, the auto mode strikes a
balance between measurement speed and accuracy; increasing the dwell time will reduce measurement
speed while increasing accuracy. User can change the dwell time by using the numeric key, rotary knob,
direction key, or touch the panel menu.
Meas Preset: Reset all parameters of the current measuring mode to factory setting.
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