A-M Systems 3000 Gebruiksaanwijzing - Pagina 4

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Instrument Features

The AC/DC Differential Amplifier, Model 3000 is a single-channel, differential amplifier

that can be used with or without a head stage probe. The instrument is designed for

low-noise recordings from excitable tissue. It is intended for extracellular recording

and/or stimulating in conjunction with microelectrodes. It can be used in a number of

research or teaching applications requiring extracellular neurophysiological recording

from excitable tissue, such as nerve, muscle (EMG), EEG, EKG, and ERG recordings.

The instrument is not intended for clinical measurements using humans.

The Model 3000 contains a high-gain, low-noise differential amplifier stage followed by

low frequency, high-frequency, and notch filters. Three operating modes are available

to accommodate recording, stimulating, and verification of electrode impedance.

Record Mode offers six levels of signal gain (x50, x100, x500, x1000, x5000, and

x10,000). Stimulus Mode allows the current passing through the electrode to be

measured during stimulation at six levels of gain (5V/mA, 10V/mA, 0.05V/µA, 0.1V/

µA, 0.5V/µA, 1V/µA). Impedance Mode utilizes an internally calibrated current source

to allow in situ verification of electrode impedance and adjustment of capacitance

compensation. Units that are sold with a head stage are pre-configured to work with

the headstage, and the front panel gain values include the gain of the headstage.

Controls and Connectors

Input Controls

This 15-pin connector receives a signal either directly from the electrodes (non

PROBE:

head stage version) or from the Head Stage probe for further processing.

INPUT SELECT (DIFF-MONO-GND)

input for differential operation, monopolar operation, or grounds the inputs to the

amplifier.

INPUT LEADS (standard):

leads. The black wire is the "+" electrode lead. The white wire is the "-" reference

lead. The silver wire is a driven shield, and should not be grounded! This wire

serves to minimize signal loss due to capacitance.

HEADSTAGE PROBE (optional):

to electrodes.

PROBE+

recording microelectrode; It is the larger 2mm jack).

indifferent lead. Either the

A-M Systems

General Description

(non headstage version only): This switch sets the

Supplied with the Model 3000 is a DB-15 connector with three

The Headstage Probe has three sockets for connection

is used to connect to the electrode (usually a high impedance

connector, or the front panel

PROBE GND

131 Business Park Loop, P.O. Box 850 Carlsborg, WA 98324

Telephone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525

E-mail: [email protected] * Website:

is used to connect to the

PROBE-

http://www.a-msystems.com

must be

GND