Analog Output Triggering; Connecting Analog Current Output Signals - National Instruments PXI-6238 User Manual

Chapter 5 Analog Output
the buffer at a fast enough rate to keep up with the generation, the buffer
will underflow and cause an error.

Analog Output Triggering

Analog output supports two different triggering actions:
•
•
A digital trigger can initiate these actions. NI 6238/6239 devices support
digital triggering, but do not support analog triggering. Refer to the
Start Trigger Signal
information on these triggering actions.

Connecting Analog Current Output Signals

AO <0..1> are the current output signals for AO channels 0 and 1. AO GND
is the ground reference for AO <0..1>.
Figure 5-2 shows how to make analog current output connections to the
device.
Tip Internal voltage drop for the NI 6238/6239 devices is a maximum of 3 V relative to
the externally supplied voltage.
Caution The maximum output voltages rating of AO signals and input voltage ratings for
AO power supply with respect to AO GND and earth/chassis ground are listed in the
NI 6238/6239 User Manual
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Start trigger
Pause trigger
and AO Pause Trigger Signal
AO Power
Supply Pin
Internal
User-
Voltage
Provided
+
Drop
Power
–
Supply
User-
Provided
Load
AO GND
Figure 5-2. Analog Current Output Connections
5-4
AO
sections for more
NI 6238/6239
DAC
AO x
User-Provided
AO GND
ni.com