Tektronix TEKFAX ADA400A, Instruction Manual

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ADA400A Differential Preamplifier
11
Reference
The Reference section describes how to connect the inputs of the ADA400A
Differential Preamplifier and make the proper control settings. To achieve the
best performance it is important to make the proper signal and ground connec-
tions, set the controls to optimize the performance of the preamplifier, and
reduce unwanted electrical interference.
Connecting the Inputs
Making the proper input connections is crucial to maintaining the fidelity of the
signal as well as eliminating unwanted noise. The characteristics of the signal
source and the type of measurement you wish to make, determine the type of
input leads you should use and the way you should connect the inputs.
WARNING.
To prevent personal injury, do not attach the ADA400A Differential
Preamplifier to human subjects for any testing or bio-monitoring.
The ADA400A Differential Preamplifier is able to amplify extremely small
signals that may or may not have a ground reference. Often the signals originate
from low-level, low-frequency transducers, and other similar sources of small
differential or floating voltages.
The inputs of the ADA400A Differential Preamplifier connect easily to devices
or leads that terminate with male BNC connectors. There are numerous adapters
readily available that can adapt other types of wire, cables, or plugs to a BNC
connector.
NOTE
. Avoid using attenuating probes. The slightest difference in attenuation
match greatly lowers the common-mode rejection ratio.
Input Devices