GEN7iB
237
INPUT CARDS
INPUT CARDS
12
12.4.3 Using the GN815 and GN816
High bandwidth and measurement cabling.
Due to the high bandwidth measurement capabilities of the acquisition card, combined with
the high measurement sensitivity of the card, it is important to pay close attention to the
measurement cabling.
Some advice to prevent measuring unwanted disturbances:
● Keep measurement cables as short as possible in order to reduce the reception of
environmental disturbances.
● Use shielded cables. The cable should have the measurement cables paired
inside a shield. Preferably, the shield should be connected to the chassis of the
measurement Genesis High Speed equipment. Alternatively, the shield could also
be connected to the chassis of the object under test.
Shielding
cables
Fig. 12.55 Shielded cable principles
● For high frequency disturbances where high bandwidth measurement is not
required,themeasurementbandwidthcanbereducedbyusingthelowpasslter
of the acquisition card.
● If unshielded cables are used, keep them as close together as possible, i.e. posi-
tion them next to each other (to keep the loop small).
● Make sure that measurement cables that are used for measuring high dynamic
or distorting signals are not closely positioned to measurement cables used for
measuring small sensitive signals.
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