B+K precision RFM3000 Series User Manual page 37

Operation
Distal
Sets the pulse amplitude percentage that defines the end of a rising edge or beginning
of a falling edge transition. Typically, this is 90% voltage or 81% power relative to the
top level of the pulse. This setting is used when making automatic pulse risetime and
falltime calculations.
Mesial
Sets the pulse amplitude percentage that defines the midpoint of a rising or falling
edge transition. Typically, this is 50% voltage or 25% power relative to the top level
of the pulse. This setting is used when making automatic pulse width and duty cycle
calculations.
Proximal
Sets the pulse amplitude percentage that defines the beginning of a rising edge or end
of a falling edge transition. Typically, this is 10% voltage or 1% power relative to the
top level of the pulse. This setting is used when making automatic pulse risetime and
falltime calculations.
Pulse Unites
Controls whether the distal, mesial, and proximal thresholds are computed as voltage or
power percentages of the top/bottom amplitudes. If Volts is selected, the pulse tran-
sition thresholds are computed as voltage percentages. If Watts are selected, they are
computed as power percentages.
units setting.
Many pulse measurements call for 10% to 90% voltage (which equates to 1% to 81% power) for risetime and falltime
measurements, and measure pulse widths from the half-power (–3 dB, 50% power, or 71% voltage) points. The Pulse
Units setting is independent of the channel's display
Start Gate
Sets the beginning of the pulse measurement region as a percentage of the pulse width. The Start Gate has a continuous
range of 0.0% to 40.0% of the pulse width and may be entered numerically or varied using the up or down arrows.
End Gate
Sets the end of the pulse measurement region as a percentage of the pulse width. The End Gate has a continuous range
of 60.0% to 100.0% of the pulse width and may be entered numerically or varied using the up or down arrows.
The Gate settings define the measurement interval for the following power related pulse measurements: Pulse Average,
Pulse Peak, Pulse Minimum, and Pulse Droop/Tilt. Pulse timing measurements between mesial crossings such as width
and period are not affected. The purpose of the Pulse Gate setting is to exclude edge transition effects from the pulse
power measurements.
Figure 4.17
CH# Pulse Def Menu
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