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2–10
THS710A, THS720A, THS730A & THS720P Service Manual
If you are using both of the oscilloscope channels, you must attach the probe
reference lead for each channel directly to your circuit. These attachments are
required because the oscilloscope channels are electrically isolated; they do not
share a common chassis connection. If you are also using the DMM, you must
also attach the DMM common lead to your circuit for the same reason as above.
Understand the voltage ratings for the probes you are using and do not exceed
those ratings. Two ratings are important to know and understand:
H The maximum measurement voltage from the probe tip to the probe
reference lead
H The maximum floating voltage from the probe reference lead to earth ground
These two voltage ratings depend on the probe and your application. Refer to
Specifications beginning on page 1–1 for more information.
WARNING. To prevent electrical shock, do not exceed the measurement or
floating voltage ratings for the oscilloscope input BNC connector, probe tip,
probe reference lead, DMM input connector, or DMM lead.
Attaching the Reference
Leads Correctly
Beware of High Voltages