Chapter 1 Getting Started

Operating the Counter

NOTE

As the graph shows, the Counter never computes power-correction values

 

for loss above the zero axis. Conversely, corrections are never computed

 

for gain below the zero axis. Once the correction value reaches the zero

 

axis, no further corrections are applied.

 

When the Counter interpolates for frequencies that are above or below the

 

 

range of frequencies specified in the currently selected profile, it never

 

computes a value that would fall on the opposite side of the zero axis from

 

the closest specified frequency. In other words, if there are two or more

 

data points that contain loss values, the Counter never computes or

 

applies a correction that would be indicative of gain. Conversely, if there

 

are two or more data points that contain gain values (negative loss values),

 

the Counter never applies a correction that would be indicative of loss.

 

Since there can be no further change in the loss or gain values once the

 

zero axis is reached, no power corrections are applied when the input

 

frequency reaches or passes a point in the profile that intersects the zero

 

axis. Effectively, the Counter computes only loss-correction values or

 

gain-correction values—never both within the same profile.

 

When you enter values in power-correction data points and then exit the

 

data-point display (using either the left-arrow key or the Enter key), the

 

Counter immediately sorts all of the data-points into order by the

 

frequency values. Therefore, if you enter a pair of values in a data point,

 

exit the data-point display, and then immediately return to the display for

 

that data point, you may see different values than the ones you just

 

entered. The values you entered may now be contained in a differently

 

numbered data point in the same profile, if they were previously entered

 

out of order by frequency.

 

Increasing Profile Accuracy

 

To increase the accuracy of a power-correction profile, you can add data

 

points between the existing data points in the profile (if less than 10 data

 

points are in use), thus bringing the data points closer together and

 

shortening the straight-line segments. If all ten data points are in use,

 

you can add data points by using two or more profiles for a single test

 

configuration. If you do this, you must select the profile you need (from the

 

Menu) for the range of frequencies being measured. This means that you

 

must select a different profile whenever the measured frequency moves

 

outside the range of frequencies defined by the data points in the

 

currently selected profile.

1

Operating Guide

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Agilent Technologies 53152A, 53150A, 53151A manual Increasing Profile Accuracy

53151A, 53150A, 53152A specifications

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