Chapter 3 Signal Connections
DAQArb 5411 User Manual 3-2
©
National Instruments Corporation
ARB Connector
The ARB connector provides the waveform output. The maximum
output levels on this connector depend on the type of load termination.
If the output of a DAQArb 5411 terminates into a 50 Ω load, the output
levels are ±5 V, as shown in Figure 3-2. If the output of DAQArb 5411
terminates into a high impedance load (HiZ), the output levels are
±10 V. If the output terminates into any other load, the levels are:
where Vout is the maximum output voltage level, RL is the load
impedance in ohms, and RO is the output impedance on the
DAQArb5411. By default, RO = 50 Ω, but the software can also set it
to 75 Ω.
Note: Software will set the voltage output levels based on a 50 Ω load termination.
For more information on waveform generation and analog output
operation, refer to Chapter 4, Arb Operation. For specifications on the
waveform output signal, see Appendix A, Specifications.
Figure 3-2. Output Levels and Load Termination Using a 50 Ω Output Impedance

V

out

= ±x 10 V

R

L

R

L

+ R

O
ARB
DAQArb 5411
Load
±5 V
R
L
=
50 Ω
ARB
DAQArb 5411
Load
±10 V
R
L
=
HiZ
50 Ω Load
High Impedance Load
R
O
=
50
R
O
=
50 Ω
Ω