Keithley 4200-SCS Reference Manual page 713

Model 4200-SCS Reference Manual
Figure 8-121
Returned data set for waveform discrete readings
Figure 8-122
Returned data set for waveform average readings
Number of pulses = 2
Number of samples = 15
Timestamps enabled
Voltage Reading
Pulse 1 Pulse 2
S1
4200-901-01 Rev. S / May 2017
Number of pulses = 2
Number of samples = 15
Timestamps enabled
Sample 1 Readings Sample 2 Readings
(Pulse 1)
V I
T1
S1 S1
Sample 1 Readings Sample 2 Readings
(Pulse 2)
V I
S1 S1 T1
Waveform average readings
For this data acquisition type, each returned reading is a mean average of the
corresponding samples for all the pulses in the burst. For example, in
V and I readings for Sample 1, Pulse 1 would be averaged with the V and I readings for
Sample 1, Pulse 2.
as a data set for two pulse periods with voltage, current, and time stamp readings
enabled.
Sample 1 Readings
Current Reading
Pulse 1 Pulse 2
+ + T1
S1 S1 S1
2 2
Sample 15 Readings
Voltage Reading
Pulse 1 Pulse 2
+
S15 S15
2
Load line effect compensation (LLEC)
The basic pulse test system is a series circuit that consists of the pulse card resistance
(fixed at 50 Ω), interconnect resistance, and the resistance of the DUT. In this series
circuit, the sum of the voltage drops across these three components is equal to the
output voltage of the pulse generator. Therefore, if the resistance of the DUT changes,
the voltage seen at the DUT also changes. This effect is called the "load line effect."
See DUT resistance determines pulse voltage across DUT
how the resistance of the DUT affects the voltage across it.
Return to
S1, S2, etc. = Measurement samples
V = Voltage reading
I = Current reading
T1, T2, etc. = Timestamps
(Pulse 1)
V I
T2
S2 S2
(Pulse 2)
V I
S2 S2 T2
Figure 8-122 shows how waveform average readings are returned
S1, S2, etc. = Measurement samples
T1, T2, etc. = Timestamps
Sample 2 Readings
Voltage Reading Current Reading
Pulse 1 Pulse 2 Pulse 1 Pulse 2
+ +
S2 S2 S2
2 2
Current Reading
Pulse 1 Pulse 2
+ T15
S15 S15
2
Section Topics
Section 8: Keithley User Library Tool (KULT)
Sample 3 Readings
(Pulse 1)
V I
S15 S15 T15
Sample 3 Readings
(Pulse 2)
V I
S15 S15 T15
T2
S2
in Section 11 for details on
Figure 8-121 the
8-197