TDS 500D, TDS 600B, & TDS 700D User Manual
D–1
Appendix D: Probe Selection
The TDS Oscilloscope can use a variety of Tektronix probes for taking different
kinds of measurements. To help you decide what type of probe you need, this
section introduces the five major types of probes: passive, active, current,
optical, and time-to-voltage probes. See Appendix A: Options and Accessories
for a list of the optional probes available; see your Tektronix Products Catalog
for more information about a given probe.
NOTE. With some TDS models, Tektronix ships the recommended general-pur-
pose probes as standard accessories. (The model probe and number shipped
depends on the model — see Probes in Table A–2 on page A–4.) The TDS 580D,
TDS 680B, TDS 684B, TDS 784D, and TDS 794D oscilloscopes ship without
probes. Tektronix recommends you order and use the P6245, P6217, or P6158
probes. These probes take advantage of the higher bandwidth of these these
models.
Passive Voltage Probes
Passive voltage probes measure voltage. They employ passive circuit compo-
nents such as resistors, capacitors, and inductors. There are three common
classes of passive voltage probes:
General purpose (high input resistance)
Low impedance (Z
O
)
High voltage
High input resistance probes are considered “typical” oscilloscope probes. The
high input resistance of passive probes (typically 10 MW) provides negligible
DC loading and makes them a good choice for accurate DC amplitude measure-
ments. Note that most passive probes require the input impedance of the
oscilloscope to be 1 MW. The TDS 794D is 50 W only and will not work with
these probes.
General Purpose (High
Input Resistance) Probes
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