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Chapter 1: Operating the Probe
Probe Operating Range
200-Ω Signal Lead
This 2-inch orange extention lead includes a molded-in resistor to dampen
resonance caused by the lead inductance. Use this lead and the ground
extention lead to provide a flexible connection to the circuit under test.
There is a tradeoff when using the extention leads. To maintain a clean pulse
response, the probing system bandwidth is limited to 1.5 GHz. Probe
resonance is damped by the walking-stick bead and the resistor in the signal
lead.
Ground Extention Lead
This 2.25-inch black ground lead can be used to extend ground from the
walking-stick to the circuit under test. When used with the walking-stick
ground the probe resonance is damped by the bead on the walking-stick.
Alligator Ground Lead
The alligator ground lead can be used in general applications when the
bandwidth of the signal is 350 MHz or lower. With no signal lead extention the
probe resonant frequency is about 650 MHz.
Flexible Probe Adapter
The flexible probe adapter provides a
high-quality connection between a
coaxial socket and the 54701A probe.
The right-angle connection allows the
probe to remain parallel to a PC board
and the flexibility prevents the leverage
of the probe and cable from damaging PC
board circuitry.
As with any cable-type interconnection,
always apply insertion and removal forces
to the connectors directly, and not
through the cable itself (see the
illustration).
18
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