Amplitude; Ranging - Keithley 6220 Reference Manual

Model 6220/6221 Reference Manual

Amplitude

The amplitude setting range for all four waveform types is from 1pA to 105mA
peak. The peak-to-peak value is double the amplitude setting. For example, a
1mA amplitude setting results in a 2mA peak-to-peak waveform.

Ranging

Range options
There are two methods of ranging:
•
•
Arbitrary waveform ranging
The arbitrary waveform is described in normalized units from -1 to +1. The
examples below will help to clarify.
Example 1
Ranging: BEST
Amplitude: 10mA peak
Offset: 0mA
ARB values: range from +1 to -1
These settings will generate a waveform with a peak-to-peak value of 20mA on
the 20mA range.
Example 2
Ranging: BEST
Amplitude: 10mA peak
Offset: 0mA
ARB values: range from 0.5 to -0.5
These settings will generate the same waveform as Example 1 except the peak-
to-peak value will be 10mA on the 20mA range.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
BEST FIXED — This option will automatically select the range based on
the amplitude and offset parameters set at the time the waveform is armed.
For example, if the amplitude setting is 50mA, the 100mA source range will
be used.
FIXED — With this option, the waveform will be generated on the current
range set at the time the wave is armed (after error checking is performed).
If using this option, be sure that range is high enough for the selected
amplitude and offset.
Return to
Wave Functions (6221 Only)
Section 7 topics
7-5