Duty Cycle; Amplitude Units; Figure 7-1 Offset Example - Keithley 6220 Reference Manual

Model 6220/6221 Reference Manual
Figure 7-1
Offset example
1mA
0mA

Duty cycle

For a square wave
cycle that the wave is high relative to the period of the waveform. For a ramp
waveform
wave cycle that is rising. A 50% duty cycle corresponds to a symmetric triangle
wave. The left waveform in
form has 0% duty cycle, and the right waveform has a 50% duty cycle.

Amplitude units

The front panel allows setting wave amplitude in either RMS or peak units. The
default is peak. The RMS selection will only apply for sine wave (RMS =
0.70710678 x peak) or triangle wave (RMS = 0.57735027 x peak) and be ignored
for other waveform types. The wave amplitude units are available for front panel
only; remote operations always receive and return the units in peak. The choice
between RMS and peak from the front panel is not saved as part of a stored
setup. Power cycling the instrument always resets the front panel menu to the
default of peak. When editing the wave amplitude, the label "Peak" or "RMS" will
be displayed if the waveform type is affected by the RMS vs. peak selection (ramp
or sine waves only).
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20mA p-p
(Figure 7-2A), the duty cycle setting is the portion of the total
(Figure 7-2B), the duty cycle corresponds to the fraction of the total
Figure
Return to Section 7 topics
Wave Functions (6221 Only)
10mA Peak
7-2B has a 100% duty cycle, the center wave-
7-7