Keithley 2182, User Manual, Page: 328 / 339

I-12 Delta, Pulse Delta, and Differential Conductance
Figure I-5
Pulse timing
The three available sweeps include (1) staircase sweep, (2) logarithmic sweep and (3) cus-
tom sweep. Examples of these Sweep outputs are shown in
Figure I-6 .
Staircase sweep – Figure I-6 A shows an example of a staircase Sweep output. The sweep
is configured to start high pulses at 2mA and staircase to 10mA in 2mA steps. The low
pulse level for this sweep is 0mA.
Logarithmic sweep – Figure I-6 B shows an example of a logarithmic Sweep output. The
sweep is configured to output five high pulses (points). The first high pulse starts at 1mA
and logarithmically steps to 10mA. The low pulse level for this sweep is 0mA.
Custom sweep –
Figure I-6
C shows an example of a custom Sweep output. The sweep is
configured to output five high pulses (points). The level for each high pulse is specified by
the user. The high pulse levels for this output are 1mA, 2mA, 4mA, 8mA and 16mA. The
low pulse level for this sweep is 0mA.
I-High
I-Low
Power
Line
Voltage
1
2
Pulse
Width
3
Pulse
Width
3
Pulse
Width
3
One Line Cycle
4
One Line Cycle
4
One Line Cycle
4
One Line Cycle
4
Low High Low
One Line Cycle
4
1) I-High can be set from -105mA to +105mA (default is 1mA).
2) I-Low can be set from -105mA to +105mA (default is 0mA).
3) Pulse Width can be set from 50µs to 12ms (default is 110µs).
4) One 60Hz power line cycle = 16.667ms (1/60)
One 50Hz power line cylce = 20ms (1/50)
5) With Interval set to 5 PLC (power line cycles):
60Hz: One Pulse Delta cycle = 83.33ms (5/60)
50Hz: One Pulse Delta cycle = 100ms (5/50)
6) Interval can be set from 5 to 999999 PLC (default is 5 PLC).
One Pulse Delta Cycle
(Interval = 5 PLC)
5, 6