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41
Peak power
Top pulse
amplitude
90% amplitude
line
Overs
hoot
50% amplitude
line
Average power
10% amplitude
line
Pulse
width
Bottom pulse amplitude
τ
Off time
Rising time
Falling
Pulse period
Fig.3.1 Schematic diagram of pulse envelope amplitude and time domain parameter definitions
Table 3.3 IEEE pulse terms
English Term
Definition
Base Line
The standard pulse waveform consists of two normal states - high and low levels.
The base line represents the low level, which is expressed as an equivalent reference line.
Top Line
The top line represents the high level, which is also expressed as an equivalent
reference line.
In practical application, the base line and top line are defined using the histogram.
The specific definition is as follows: Taking the first transition mesial line power and last
transition mesial line power as the reference, the power value with the most power
points between the top transition and the last transition is defined as the base line.
First Transition
It refers to the main transition area between the base line and the top line of the waveform.
Last Transition
It refers to the main transition area between the top line and the base line of the waveform.
Proximal Line
It refers to an equivalent reference line with its value equal to a certain percentage
(usually 10%) of pulse amplitude near the base line.
Distal Line
It refers to an equivalent reference line with its value equal to a certain percentage
(usually 90%) of pulse amplitude near the top line.
Mesial Line
It refers to an equivalent reference line with its value equal to a certain percentage
(usually 50%) of pulse amplitude in the middle of pulse.
The S2438PA/PB microwave power meter can automatically measure 14 parameters of the pulse power envelope,
including time parameters and power amplitude parameters. The specific meanings are shown in Table 3.4.
