Bird Technologies VPM3 - Manual (Page 27)

19
Smoothing
Note:
The smoothing in this menu item is available only with the
7022 and is performed in the sensor itself. It only effects the average
power measurement in the forward direction and is used for very low
rep rate signals (<200Hz).
Selects smoothing that is performed by the sensor for average forward and
reflected power.
None -
No smoothing is performed.
Low -
Uses a moving average of 8 samples.
Medium -
Uses a moving average of 16 samples.
High - Uses a modified moving average (exponential average with alpha = 1/N).
Frequency Setpoint
Note: 7022 Only.
Auto -
The frequency will be determined by the sensor.
Full -
The specified frequency will be used in correcting the power measurement.
Note:
Use this when the sensor is unable to measure the frequency
of a signal.
Duty Cycle
Note:
7022 Only.
Sets the duty of a measurement for determining the Burst Average power. If sen-
sor is capable, the duty cycle will be inferred by the sensor hardware and
reported. A user-defined duty cycle can be entered to override the sensor pro-
vided value.
Note: If zero is entered, the duty cycle automatically sets to Auto.
Note:
For best duty cycle measurement with the 7022, have at least
10 pulses on the time domain screen.
Auto - The duty cycle will be determined by the sensor.
Specify Duty Cycle - The specified duty cycle will be used to determine the
Burst Average power.
Note:
Use this for best accuracy when the duty cycle is known.
See “Specifications” on page 51 for more information on how duty cycle is cal-
culated and used for each sensor that has the feature.
Measurement
Type
Selects the parameter that is displayed in the bar graph, meter or chart.