Agilent Technologies 4294A, Programming Manual

Page: 452 / 518

452 Chapter 16
GPIB Command Reference
THRR
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
L
and A
R
, and A is
the maximum within the range between A
L
and A
R
. 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
L
and B
R
,
but B is not the maximum within the range between B
L
and B
R
. 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
L
and
C
R
, and C is the minimum within the range between C
L
and C
R
, 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