OperatingBasics
P6330 3.5 GHz Differential Probe Instruction Manual 13
Electrical Effects of Accesso ries
The probe tip accessories included with your probe help connect to
different types of components. While these accessories make
connections easier, be aware that the adapter you choose may affect
the signal you are measuring, depending on a variety of factors,
including signal frequency, source impedance, and lead length.
Use the probe only (without adapters) to optimize stepandfrequency
response. Using the probe tip adapters adds inductance and
capacitance, which increases step response and aberrations, and le ads
to increased ripples in frequency response. These effects increase as
thesourceimpedance and the measuredwaveformrisetimes
decrease.
The recommended method for hands-free probing is to use the probe
only (without adapters), with a probe positioner such as a Tektronix
PPM203B. If you need a tip space between 0.020 and 0.180 inches
apart, use the variable spacing adapter and the probe positioner. Use
the square pin adapter for test points or component leads spaced
farther than 0.180 inches apart.
Figure5illustrates the typicaleffectson a given signalusingsome of
the adapters included with your probe.
Probeonly Variable
spacing
adapter
Squarepin
adapter
Figure 5: Typicaleffects on a signal using probe tip adapters