Keithley 4200-SCS Reference Manual page 935

Model 4200-SCS Reference Manual
VgQPoint
Vds
VdQPoint
PulseWidth
PulsePeriod
RiseTime
FallTime
Average
GateVPURange
DrainVPURange
GateScpRange
DrainScpRange
GateCompliance
DrainCompliance
GateLoadLine
4200-901-01 Rev. S / May 2017
(double) The base, or bias point, of the pulsed Gate source. VgQPoint is
range dependent and can be between -5 V to +5 V or between -20 V to +20 V.
(double) The pulsed Drain-Source voltage bias. Vds is range dependent and
can be between -10 V to +10 V or between -40 V to +40 V.
(double) The base, or bias point, of the pulsed Gate source. VdQPoint is
range dependent and can be between -10 V to +10 V or between -40 V to +40
V.
(double) The Vgs and Vds pulse width (PW). The Pulse Width can be 300 ns
to (1s - 10 ns) in 10 ns resolution steps.
(double) The pulse period for both Vgs and Vds. Minimum period is (FallTime/
2) + (RiseTime/2) + PulseWidth + 10 ns. Maximum period is 1s.
(double) The transition time from the Qpoint to the pulse value for both Vgs
and Vds. The transition time is source range dependent. For the 5 V range
(10 V for 4205-PCU) the minimum transition time is 10 ns (recommended
minimum is 50 ns) and for the 20 V range (40 V for the 4205-PCU) the
minimum transition time is 100 ns. The maximum transition time is dependent
on the pulse width, period, and fall time.
(double) The transition time from the pulse value to the Qpoint value for both
Vgs and Vds. The transition time is source range dependent. For the 5 V
range (10 V for Model 4205-PCU) the minimum transition time is 10 ns
(recommended minimum is 50 ns) and for the 20 V range (40 V for the Model
4205-PCU) the minimum transition time is 100 ns. The maximum transition
time is dependent on the pulse width, period, and fall time.
(int) The number of pulses to average (recommend 100 for a reasonable
result, use larger for lower current measurements).
(double) The source range for DUT Gate PG2. Valid ranges are 5 V (High
Speed) and 20 V (High Voltage).
(double) The source range for the DUT Drain Model 4205-PCU. Valid ranges
are 10 V (High Speed) and 40 V (High Voltage).
(double) The voltage measure range for the scope channel measuring the
Gate. Use 0 for scope autoranging, or specify a voltage value for a fixed
range. Valid voltages are 0.25, 0.5, 1.25, 2.5, 5, 10, 25, 50. The range is a full
range value (for example, 2.5 is -1.25 V to +1.25 V).
(double) The voltage measure range for the scope channel measuring the
Drain. Use 0 for scope autoranging, or specify a voltage value for a fixed
range. Valid voltages are 0.25, 0.5, 1.25, 2.5, 5, 10, 25, 50. The range is a full
range value (for example, 2.5 is -1.25 V to +1.25 V).
(double) The current compliance on the gate. This supplied value is used to
calculate the maximum voltage to source to the DUT, based on a default 50 Ω
DUT load.
(double) The current compliance on the drain. This supplied value is used to
calculate the maximum voltage to source to the DUT, based on a default 50 Ω
DUT load.
(int) Determines whether to use load line correction to compensate for the
voltage drop caused by the DUT impedance on the Gate. When load line
correction is on (1), the test will start by assuming a high impedance value for
the device and will approach the correct bias and pulse values over a series
of pulses, that ensures that the sourced pulses match the requested values.
When load line correction is turned off, the specified voltages will be sourced.
(1 = Use Load Line, 0 = No Load Line).
Return to Section Topics
Section 11: Pulse Source-Measure Concepts
11-67