A-M Systems 1700 Manual - Page 6

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Controls and Connectors

This 5-pin connector attaches the electrode cable

INPUT:

to the amplifier channel. The pin and electrode cable

wire designations can be found in the "Operating

Instructions" section in this manual.

This 5-pin connector allows for external

STIMULUS:

signals to be applied to the electrode.

MODE (STIM-REC):

Stimulus Mode or Record Mode. In Stimulus Mode,

the

connector is connected to the signal from the

INPUT

connector is disabled. In Record Mode, the

OUTPUT

the amplification circuits and the signal is available at the

This rotary switch sets the amplifier gain to x100, x1000, or x10 000.

GAIN:

This rotary switch selects the cut-off frequency of the Low Frequency

LOW CUT-OFF:

Filter for the amplifier channel. Signals below the cut-off frequency are reduced by a

factor of 100 (40 dB) per decade decrease in the input signal frequency. The Low

Frequency Filter may be used to reduce slow DC level variations in the signal being

recorded (See Bode plot page 3).

This rotary switch selects the cut-off frequency of the High Frequency

HIGH CUT-OFF:

Filter for the amplifier channel. Signals above the cut-off frequency are reduced by a

factor of 100 (40dB) per decade increase in the input signal frequency.

This switch allows the Notch Filter to be included (

NOTCH (IN-OUT):

(

) from the signal processing circuitry on a per channel basis. When radiation from

OUT

the power lines is present, it is picked up by recording electrodes creating unwanted

interference in the recording signal. This interference can be reduced through proper

grounding and shielding techniques. Occasionally it is impossible to reduce this

interference sufficiently to record relatively noise-free signals. The Notch Filter can

sufficiently reduce the interference. However, this filter causes some distortion in

signals below 100 Hz.

This BNC connector provides the output signal from the amplifier channel.

OUTPUT:

This switch turns on power to all four amplifier channels.

POWER:

This connector is attached to the circuit ground for all four amplifier channels. To

GND:

obtain low-noise recordings, this terminal may be used to make a ground connection

to the recording medium.

A-M Systems

This switch sets the channel to

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:

connector and the

STIMULUS

connector is connected to

INPUT

connector.

OUTPUT

) in or excluded

http://www.a-msystems.com