5-28
Delta, Pulse Delta, and Differential Conductance
Model 6220/6221 User’s Manual
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Interval
The Pulse Delta cycle time period (interval) is expressed as a number of power
line cycles (PLC). For 60Hz one PLC is 16.667ms, and for 50Hz, one PLC is
20ms. Interval can be set from 5 PLC (default setting) to 999999 PLC.
Sweep
The sweep function of the Model 6221 can be enabled (YES) or disabled (NO).
When disabled (which is the default setting), the Model 6221 will be configured to
output a Fixed output using the programmed high and low pulse levels. When the
sweep function is enabled, the Model 6221 will be set to output a configured
sweep.
Low Measure
By default, three measurements are performed for every Pulse Delta interval. The
Model 2182A measures the voltage at pulse low, pulse high, and finally pulse low
as shown in
. As explained in the process for “
” on
, a 2-point measurement technique can instead be used
when pulse high may cause DUT heating. For the 2-point measurement tech-
nique, the voltage measurement for the second low pulse is not performed.
Sweep output settings
The following settings from the CONFIG PULSE DELTA menu are used for pulse
sweep output: Width, Sweep, and Low Measure.
The sweep is selected and configured from the CONFIGURE SWEEPS menu that
is accessed by pressing the
CONFIG
key and then the
SWP
key. Details on
sweeps are provided in
It is from the CONFIGURE SWEEPS menu that Source Ranging, Count, and
Sweep Delay are set:
Source Ranging
Source range can be set to
BEST
(default setting),
FIXED,
or
AUTO
. The
BEST
and
FIXED
settings are described above in “
AUTO
setting is available for a Sweep output. With
AUTO
selected, the instrument auto-
matically selects the optimum (lowest) range for the sweep step.
Delay
Sweep delay defines the Pulse Delta cycle time period (in seconds). The time
period is the same for all Pulse Delta cycles. Sweep delay can be set from 1ms to
999999.999s.
Summary of Contents for 6220 DC
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Page 36: ...1 20 Getting Started Model 6220 6221 User s Manual Return to Section 1 topics...
Page 131: ...6 10 Averaging Filter Math and Buffer Model 6220 6221 User s Manual Return to Section 6 topics...
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