Agilent Technologies 4294A Service Manual download pdf (Page 452)

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452 Chapter 16

GPIB Command Reference

THRR

Syntax THRR <numeric>

THRR?

Description Within the waveform analysis range specified with the “ANARANG” command on page

267, sets the condition on which peaks are defined among all maximal values and negative

peaks are defined among all minimal values: height (refer to Figure 16-9).

Figure 16-9 Condition of the peak/negative peak

If 2 measurement points having a value less than the maximal value minus height exist on

both left and right sides of a maximal value, and the maximal value is the maximum within

the range between those measurement points, it is considered as a peak. For example, for

maximal value A in

Figure 16-9, there are 2 points on both left and right sides having a

value less than the maximal value minus height: measurement point A

and A

, and A is

the maximum within the range between A

and A

. Therefore, it is considered as a peak.

On the other hand, for maximal value B, there are 2 points on both left and right sides

having a value less than the maximal value minus height: measurement point B

and B

but B is not the maximum within the range between B

and B

. Therefore, it is not

considered as a peak.

In the same way, if 2 measurement points having a value of the minimal value plus height

exist on both left and right sides of a minimal value, and the minimal value is the minimum

within the range between those measurement points, it is considered as a negative peak.

For example, for minimal value C in

Figure 16-9, there are 2 points on both left and right

sides having a value larger than the minimal value plus height: measurement point C

and

, and C is the minimum within the range between C

and C

, it is considered as a

negative peak. For minimal value D, there is no measurement point on the right side having

a value larger than the minimal value plus height, it is not considered as a negative peak.

Depending on the display format, the definition of height differs as shown below (in the

previous description, a measurement point having a value less than the maximal value

minus height (or a value larger than the minimal value plus height) means a threshold value

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Agilent Technologies 4294A Service Manual Page 452

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