User’s Manual UTS1000B/T Series
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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.
Start Time: Set the left boundary of the time domain power measurement in units of time. The time domain
power measurement data are calculated from the start line to the end line. The default value is 0. User can
change the left boundary by using the numeric key, rotary knob, direction key, or touch the panel menu.
Stop Time: Set the right boundary of the time domain power measurement in units of time. The time
domain power measurement data are calculated from the start line to the end line. The default value is 0.
User can change the left boundary 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.
Occupied Bandwidth
Figure
5-3
Occupied Bandwidth
The power of the spectrum shown on the screen will be calculated at first, and two marks are placed on the
spectrum.
The percentage of the power between the two frequency indicated by the mark is specified by the user. The
default percentage for testing is 99%. The power-bandwidth program calculates the power sum of all
signals on the trace at first.
For 99% of the occupied power bandwidth, the markers are placed at the two frequency on the left and
right, and the power between the two frequency accounts for 99% of the total spectrum power. The
