Trimode Operation - Tektronix TriMode TDP7700 Series Technical Reference

Theory of operation
Figure 5: TDP7700 Series TriMode probe input architecture with the P77C292MM SMA adapter

TriMode operation

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The TriMode feature of the TDP7700 Series probes is designed for improved
convenience and enhanced capability in measuring differential signal quality.
Because a differential signal is composed of two complementary single-ended
signals, full characterization of a differential signal requires more than a simple
differential measurement.
A TriMode probe features four input modes that allow a differential signal to be
fully characterized with four measurements:
■ Differential
■ Positive polarity, single-ended
■ Negative polarity, single-ended
■ Common mode
A TriMode probe provides improved efficiency and convenience by enabling full
differential signal characterization from a single soldered connection.
TekFlex active probe solder tips support the TriMode functionality of a TDP7700
Series probe by buffering a matched pair of input signals from a DUT differential
signal connection. These active solder tips support the transmission of high-
frequency return currents through a probe tip ground path referenced to the DUT
ground connection.
TDP7700 Series TriMode Probes Technical Reference