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Probe Accessories
Reference
Marker Rings
The marker rings help you keep track of individual probes and signal sources
when you have a complicated test setup. Use the marker rings whenever you
want to identify a particular probe.
Long Ground Leads
Use long ground leads when a long reach is important and high-frequency
information is not. Long ground leads are ideal for quick troubleshooting when
you are looking for the presence or absence of a signal and are not con-
cerned with the precision of the measurement.
Because of the high inductance associated with long ground leads, you
should not use them for precise measurements above approximately 30 MHz
(or for pulses with rise times less than about 11 ns).
You can choose between a ground lead terminated with an alligator clip and a
lead terminated with a square-pin receptacle.
Low-Inductance Ground Lead
Low-inductance ground leads reduce ground lead inductance. Compared to a
typical six-inch ground lead with an inductance of approximately 140 nH, the
low-inductance tip assembly has an inductance of approximately 32 nH. That
means that your measurements will be relatively free of probe-related high-
frequency degradation up to approximately 250 MHz.
The low-inductance tip has a partially insulated flexible ground pin that allows
you to ground the probe and still have a limited amount of reach with the
probe tip. Because the ground lead simply contacts the ground reference
(instead of clipping onto it) you can move the probe around your device under
test with ease. The assembly is well-suited to densely populated circuit
boards and multi-pin connectors.