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3 Bandwidth menu
· [Average Off On]: Press [BW]→[Average Off On]. Change the average
with the number keys or [↑] or [↓] key or knob, with the step of 1.
· [Special note]: The averaging function is generally applied to
smooth the trace in measurement of the low-power signal or signal
close to the noise power, so as to reduce the influence of random
noise on measurement, and improve the measurement accuracy.
However, the measurement speed will be reduced at the same time.
The averaging frequency is decisive to the average reading
frequency. The higher the averaging frequency is, the more noise will
be reduced.
4 Calibrate menu
· [Zero]: Press [Calibrate]→ [Zero].
· [Special attention]: To improve measuring precision of the
instrument, zero calibration of the instrument is necessary before
small signal power measuring of AV8723X Series USB Power Probe.
Zero calibration refers to measurement and saving of noise of the
whole measurement channel. Deduct zero correction value, i.e. the
noise of the whole measurement channel during the measurement to
obtain input signal level of the channel. The USB power probe is
calibrated in the same way as the ordinary power probe. The
calibration here refers to internal calibration of the USB power probe,
in which the switch is added at the front end of the measurement
channel. The user can measure and save the channel noise without
disconnecting the sensor from the tested part. The RF signal should
be always applied on the power probe during internal zero
calibration, so as to reduce the wear of the probe connector and
shorten the test time.