Document 291945 Issue 1

www.

plesseysemi.com

- 6 -

REAR

USB

EARTH

INV

NON-INV

PS25003

x1

x100

DRL Out

USB

EARTH

USB

EARTH

INV

NON-INV

PS25003

x1

x100

DRL Out

Control and Interface box rear panel

•

Earth terminal

•

Driven Right Leg (DRL) circuit

o

Phase selector

o

Gain control, x1 to x100

o

4mm output socket

•

A USB 2.0 interface

A short specification of the control and interface box is:

Parameter

min

typ

max

Units

Notes

Supply voltage – USB 2.0

5.0

V

Low pass filter

30

Hz

Notch filter

frequency

50/60

Hz

attenuation

30

dB

Q

4

Analogue output impedance

10

Ω

Data acq’n

resolution

12

bit

Sampling rate

10

kS/s

Output rate

150

Hz

The power for the internal electronics of the box is provided by the data acquisition

card. This is a National Instruments card, USB-6008. The internal electronics can

only be powered by connection of the USB port to a computer with the driver for the

DAQ installed.