Optimizing the Readings

This section presents information on how to get the fastest readings from the power sensor when using the Anritsu PowerXpert application or operating under remote control (refer to Programming Commands for Power Master for specific remote programming command descriptions). Measurement speed depends greatly on the type of measurement, the power level, and stability of the signal. Stability of a measurement is influenced by noise and signal modulation. If high resolution is required, averaging must be increased.

Table: MA24108A, MA24118A, MA24126A Sensor Averaging Table (continuous mode, default settings, 20 ms aperture time) describes the number of averages needed for the MA241xxA sensors to attain a certain noise level for a particular power level measurement.

Table: MA242x8A Sensor Averaging Table (continuous mode, default settings, 20 ms aperture time) describes the number of averages needed for the MA242x8A sensors to attain a certain noise level for a particular power level measurement.

Note | The values in the following table are typical and should be used as reference only. |

Input Power (dBm) | Input Power (mW) | Number of Averages Needed for < ±0.20 dB Noise | Number of Averages Needed for < ±0.15 dB Noise | Number of Averages Needed for < ±0.10 dB Noise | Number of Averages Needed for < ±0.05 dB Noise | Number of Averages Needed for < ±0.01 dB Noise |

20 | 100.000 | 1 | 1 | 1 | 1 | 1 |

15 | 31.623 | 1 | 1 | 1 | 1 | 1 |

10 | 10.000 | 1 | 1 | 1 | 1 | 1 |

5 | 3.162 | 1 | 1 | 1 | 1 | 2 |

0 | 1.000 | 1 | 1 | 1 | 1 | 13 |

–5 | 3.162E–01 | 1 | 1 | 2 | 5 | 121 |

–10 | 1.000E–01 | 1 | 1 | 1 | 1 | 1 |

–15 | 3.162E–02 | 1 | 1 | 1 | 1 | 1 |

–20 | 1.000E–02 | 1 | 1 | 1 | 1 | 4 |

–25 | 3.162E–03 | 1 | 1 | 1 | 2 | 31 |

–30 | 1.000E–03 | 1 | 2 | 4 | 13 | 303 |

–35 | 3.162E–04 | 8 | 14 | 31 | 123 | 3025 |

–40 | 1.000E–04 | 79 | 139 | 309 | 1222 | 30248 |

Noise Calculations:

where:

Continuous Average Mode: | Scope Mode: |

Power = Power level being measured in dBm Points = 1 Time = Aperture time in milliseconds N = Number of averages | Power = Power level being measured in dBm Points = The number of data points on the scope graph Time = Capture time in milliseconds N = Number of averages |

Note | The values in the following table are typical and should be used as a reference only. |

Input Power (dBm) | Input Power (mW) | Number of Averages Needed for < ±0.20 dB Noise | Number of Averages Needed for < ±0.15 dB Noise | Number of Averages Needed for < ±0.10 dB Noise | Number of Averages Needed for < ±0.05 dB Noise | Number of Averages Needed for < ±0.01 dB Noise |

20 | 100.000 | 1 | 1 | 1 | 1 | 1 |

15 | 31.623 | 1 | 1 | 1 | 1 | 1 |

10 | 10.000 | 1 | 1 | 1 | 1 | 1 |

5 | 3.162 | 1 | 1 | 1 | 1 | 8 |

0 | 1.000 | 1 | 1 | 1 | 1 | 1 |

–5 | 3.162E–01 | 1 | 1 | 1 | 1 | 1 |

–10 | 1.000E–01 | 1 | 1 | 1 | 1 | 1 |

–15 | 3.162E–02 | 1 | 1 | 1 | 1 | 10 |

–20 | 1.000E–02 | 1 | 1 | 1 | 1 | 1 |

–25 | 3.162E–03 | 1 | 1 | 1 | 1 | 1 |

–30 | 1.000E–03 | 1 | 1 | 1 | 1 | 2 |

–35 | 3.162E–04 | 1 | 1 | 1 | 1 | 15 |

–40 | 1.000E–04 | 1 | 1 | 2 | 6 | 147 |

–45 | 3.162E–05 | 4 | 7 | 15 | 60 | 1465 |

–50 | 1.000E–05 | 39 | 68 | 150 | 592 | 14644 |

–55 | 3.162E–06 | 383 | 673 | 1495 | 5912 | 146437 |

–60 | 1.000E–06 | 3824 | 6721 | 14950 | 59116 | 1464363 |

Noise Calculations:

2 sigma noise

2 sigma noise

2 sigma noise

where:

Continuous Average Mode: | Scope Mode: |

Power = Power level being measured in dBm Points = 1 Time = Aperture time in milliseconds N = Number of averages | Power = Power level being measured in dBm Points = The number of data points on the scope graph Time = Capture time in milliseconds N = Number of averages |