User manual

Chapter 4 Connecting Signals

Figure 4-7 shows how to connect a grounded signal source to a channel

configured for NRSE mode on the NI 6034E/6035E/6036E device.

Figure 4-7. Single-Ended Input Connections for Ground-Referenced Signals

Common-Mode Signal Rejection Considerations

Figures 4-4 and 4-7 show connections for signal sources that are

already referenced to some ground point with respect to the

NI 6034E/6035E/6036E device. In these cases, the PGIA can reject any

voltage caused by ground potential differences between the signal source

and the device. In addition, with differential input connections, the PGIA

can reject common-mode noise pickup in the leads connecting the signal

sources to the device. The PGIA can reject common-mode signals as long

as V+

and V–

(input signals) are both within ±11 V of AIGND.

Selected Channel in NRSE Configuration

PGIA

Programmable

Gain

Instrumentation

Amplifier

–

Input Multiplexers

AISENSE

AIGND

–

ACH+

ACH–

Common-

Mode

Noise and

Ground

Potential

Ground-

Referenced

Signal

Source

Measured

Voltage

I/O Connector

UM.book Page 17 Monday, May 14, 2001 10:32 AM