User’s Manual UTS1000B/T Series
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Horizontal axis is frequency, vertical axis is time, and color presents the energy size of spectrum.
It is used to detect the intermittent occurrence of the spectrum, and the spectrum monitoring can observe
the change of the signal in a period of time.
Press [Meas] >Spectrum Monitor 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.
Meas Preset: Reset all parameters of the current measuring mode to factory setting.
Carrier to Noise Ratio
Figure
5-7
Measurement of Carrier-to-Noise Ratio
