General Power Meter Functions 2
N1911A/1912A P-Series Power Meters User’s Guide 49
Setting Measurement Averaging
The power meter uses a digital filter to average power readings. The
number of readings averaged can range from 1 to 1024. This filter is used
to reduce noise, obtain the desired resolution and to reduce the jitter in
the measurement results. Increasing the value of the measurement average
reduces measurement noise. However, the measurement time is increased.
You can manually select the measurement average or you can set the
power meter to auto measurement average mode. The default is AUTO.
When the auto measurement average mode is enabled, the power meter
automatically sets the number of readings averaged together to satisfy the
filtering requirements for most power measurements. The number of
readings averaged together depends on the resolution setting and the
power level currently being measured.
Figure 2-32 Typical averaged readings
Figure 2- 32 shows the typical number of averages for each range and
resolution when the power meter is in auto filter mode and is set to
normal speed mode. P- Series power meters recognize different sensor
types when they are connected, and configure suitable averaging
automatically.
10 dB
10 dB
Minimum Sensor Power
Maximum Sensor Power
Power Sensor
Dynamic Range
10 dB
10 dB
1234
1 8 128 128
Resolution Setting
Number of Averages
1 1 16 256
11232
11116
1118
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