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E5400-Pro Series Soft Touch User’s Guide
4
Operating the E5402A, E5405A, and E5406A-Pro Series Probes
Time Domain Transmission (TDT)
All probes have a loading effect on the circuit when they
come in contact with the circuit. Time domain transmission
(TDT) measurements are useful for understanding the probe
loading effects as seen at the target receiver. The following
TDT measurements were made mid- bus on a 50
Ω
transmission line load terminated at the receiver. These
measurements show how the E5402A, E5405A, and
E5406A- pro series soft touch probes affect an ideal step
seen by the receiver for various rise times.
Figure 30
TDT measurement schematic (E5402A, E5405A, and E5406A)
The following plots were made on an Agilent 54750A
oscilloscope using TDT.