TDT RZ2 Manual page 449

System 3
Jumper Connections
G
R
Ref
G
R
Ref
NN32AC ‐ 32 Channel Acute Headstage
The 32 Channel Acute headstage is recommended for extracellular neurophysiology
using silicon electrodes, metal microelectrodes or microwire arrays with input
impedance from 20 kOhm to 5 Mohm. The headstage features a 40-pin connector
designed for use with the NeuroNexus Acute 32-channel probe. The headstage
connects to a PZ series preamplifier via two mini 26-pin connectors or to two
RA16PA preamplifiers via two 25-pin connectors. For either headstage, Connector A
carries the signals for channels 1-16, power and ground. This connector must be
connected whether you are acquiring data from one of these channels or not.
Part Numbers:
NN32AC—32 Channel Acute Headstage for Medusa PreAmps
NN32AC-Z—32 Channel Acute Headstage for Z-Series (PZ) PreAmps
handling.
Headstage Voltage Range
When using a TDT preamplifier the voltage input range of the preamplifier is
typically lower than the headstage and must be considered the effective range
of the system. Check the specifications of your amplifier for voltage range. Also
keep in mind that the range of the headstage varies depending on the power supply
provided by the preamplifier. TDT preamplifiers supply +/- 1.5 V, but third party
preamplifiers may vary. TDT recommends using preamplifiers which deliver +/- 2.5
V or less. Check the preamplifier voltage input and power supply specifications and
headstage gain to determine the voltage range of the system.
The table below lists the input voltage ranges for the NN32AC and NN32AC-Z for
either a +/- 1.5 V or +/- 2.5 V power source.
Headstage input range when using +/-
1.5 V power source
+/- 0.9 V
Shorts headstage Reference input to the
pin labeled Ref (a low impedance site
on the probe) yielding differential
amplification of signals relative to the
voltage of the Ref site.
Headstage Ground and Reference
separated and Ref pin is not used,
yielding differential amplification of
signals relative to the voltage of the
Reference.
The headstage has sensitive electronics. Always ground yourself before
Operation
Headstage input range when using +/-
2.5 V power source
+/- 1.9 V
Acute (Non-ZIF) Headstages
10-35
Requirements
Connect Ground wire to
the headstage or
electrode.
Connect both a Ground
wire and a Reference
wire to the headstage
or electrode.