TDT RZ2, Manual, Page: 301 / 736

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Headstage Connection Guide
Headstage Connection Guide
Overview
Ground and Reference placement is important in all headstage configurations. They
determine the operation of the headstage and can, if incorrectly wired, produce
undesired results.
Important! High channel count recordings (implemented either with PZ or multiple Medusa
preamplifiers) may be implemented using multiple headstages. When using multiple
headstages, ground pins on all headstages should be connected together to
form a single common ground. This ensures that all headstage ground pins are at
the same potential and eliminates additive noise from varying potentials across the
subject’s brain.
This section serves as a guide to headstage connection and will illustrate single and
multiple headstage configurations. A common error example is provided for the final
illustration.
Headstage Operation
Headstage operations can be categorized into three forms listed below. It is important
that multiple headstage configurations use a common node for all grounds regardless
of the operation of the headstage.
Headstage Operations Description
Single-Ended Ground and reference pins are tied together and the
probe(s) reference all channels to ground.
Differential Ground and reference pins are separate and the probes may
use shared or multiple references.
Hybrid A mixture of single-ended or differential operations when
multiple headstages are used.