Figure 1-3 Averaging Range Hysteresis; Filter Length - Keysight N1911A Programming Manual

Power Meter Remote Operation 1
Range Hysteresis
9.5 dB 10.5 dB
Minimum Sensor Power Minimum Sensor Power + 10 dB
Figure 1-3 Averaging Range Hysteresis

Filter Length

You specify the filter length using the following command:
[SENSe[1]]|SENSe2:AVERage:COUNt <numeric_value>
The range of values for the filter length is 1 to 1024. Specifying this command
disables automatic filter length selection. Increasing the value of the filter length
reduces measurement noise. However, the time to take the measurement is
increased.
N1911A/1912A P-Series Power Meters Programming Guide 59