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Agilent Technologies 53151A, 53152A manual Setting the Number of Averages, Averages Setting Example

Models: 53151A 53150A 53152A

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Setting the Number of Averages

Chapter 2 Operating Your Frequency Counter

Setting the Number of Averages

 

 

Setting the Number of Averages

 

 

You can set the Counter to take a variable number of frequency, power,

 

 

or voltage measurements and average them mathematically before

 

 

displaying the result. You can use this feature to determine the effective

 

 

measurement of a signal that is fluctuating. When measuring the

 

 

frequency of a fluctuating signal, you can also use averaging to retain

 

 

some of the precision of a maximum-resolution measurement.

 

 

The default number of averages is 1, which means that no averages are

 

 

performed, and the maximum setting is 99. Note that the tens position

 

 

(10 through 90) and the units position (0 through 9) are adjusted

 

 

separately, and that it is not possible to set the number of averages to 0.

 

 

 

NOTE

 

When a large number of averages is selected for a frequency measurement

 

 

in combination with a high resolution setting (e.g., 1 Hz), it takes a

 

 

considerable amount of time for the Counter to take the measurements,

 

 

compute the averages, and display an initial reading. For example, when

 

 

the number of averages is set to 60, and the resolution is set to 1 Hz, the

 

 

first reading is displayed after 60 seconds (approximately). Subsequent

 

 

computations do not require as much time, since the averaging function

 

 

computes a running average. However, the rate at which the display is

 

 

updated after the initial average computation is also slower than at lower

 

 

resolution settings.

 

 

Averages Setting Example

 

 

 

1 Press the Avg key to enter the averages-setting mode.

Pwr

Offset

Avg

The current averages setting is displayed (the current value and the

 

indicator between the arrow keys are flashing to indicate that you can use

+/–

the up- and down-arrow keys to change the setting).

2Press the up-arrow or down-arrow key to decrease or increase the value for the units position of the number of averages.

2

Operating Guide

2-17

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Page 71
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Agilent Technologies 53151A, 53152A, 53150A manual Setting the Number of Averages, Averages Setting Example
Page 70 Page 72