Products

MODEL 643 COMPUTER-CONTROLLED PRECISION AMPLIFIER

 

Features
  • Precision gains
  • Differential input
  • Remotely controllable
  • Eight channels per rack

Description

The Model 643 is an eight-channel remote-controllable precision gain differential amplifier with three highly-accurate switch selectable gains of 100, 200, and 500. Under remote control, each channel's input can be shorted for zero measurement and the front panel gain select can be overridden. Three lowpass filters are also front panel selectable.

Specifications

Gain: Switch selectable 100, 200, 500

Gain accuracy: Factory trimmed to ±0.05%

Gain indication: Front panel LEDs indicate selected gain, and remote/local control

Common-mode rejection: 100dB, DC to 60Hz

Frequency response: DC to 50Hz, 500Hz, or 5000Hz; switch selectable

Filter characteristic: Four-pole Butterworth lowpass

Signal output: ±10V max., 10mA peak load

Connection: Rear panel screw terminal blocks for input and output signals

Output monitor: Front panel banana jacks monitor output signal

 

REMOTE CONTROL

Signal levels: 0V / 5V (logic level) control inputs

Address: Three bits select one of eight channels

Gain: Two bits select one of three gains, or front panel switch

Zero: One bit engages input shorting relay on addressed channel

Strobe: Pulse on Strobe input latches settings for selected channel

Power: Internal +5V and Common provided for external circuitry references

Connection: Rear panel screw terminal block

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OVERALL

Controls: Front panel power switch and indicator lamp

Power: 115VAC or 230VAC (50/60Hz) selected on rear panel

Mechanical: 19" wide (standard rackmount), 3.5" high,
14" deep overall

   

 

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