Tektronix P7330, Руководство пользователя

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Operating Basics
16
P7330 3.5 GHz Differential Probe User Manual
Electrical Effects of Accessories
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 step and frequency
response. Using the probe tip adapters adds inductance and
capacitance, which increases step response and aberrations, and leads
to increased ripples in frequency response. These effects increase as
the source impedance and the measured waveform risetimes
decrease. Refer to page 23 for input capacitance specifications when
using the variable spacing and square pin adapters.
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.
Figure 9 illustrates the typical effects on a given signal using some of
the adapters included with your probe.
Probe only
Variable
spacing
adapter Square pin
adapter
Figure 9: Typical effects on a signal using probe tip adapters