![background image](http://html1.mh-extra.com/html/keithley/dda-08/dda-08_user-manual_661637060.webp)
5-2
Subsystems and Analog I/O
Counter/Timer Subsystem
The DDA-08/16 has a simple counter/timer subsystem. It allows analog
output pacing at rates from 0.004Hz to 50kHz. In addition, it can perform
independent counter/timer tasks while the analog output subsystem is
idle, such as frequency division and strobe generation.
Refer to
DriverLINX Installation and Configuration Guide
and
Using
DriverLINX with Your Hardware, Keithley DDA-08/16
manuals for more
information.
Analog Output Subsystem
The DDA-08/16 has eight or sixteen 12-bit output DACs. DriverLINX
maps these signals to Logical Channels. The Analog Output Subsystem
has an internal pacer clock, which DriverLINX designates as Logical
Channel 0 of the Counter/Timer subsystem.
The Analog Output Subsystem supports three modes: Polled, for
single-value analog output samples; Interrupt, for buffered transfers using
programmed I/O; and Other, for subsystem initialization and data
conversion.
The Analog Output Subsystem supports the following DriverLINX
operations:
●
Initialize
—
Aborts all active analog output data-acquisition tasks.
●
Start
—
Initiates a data-acquisition task using the Mode, Timing,
Start, and Stop Events, the Logical Channels, and the Buffers
application specified in the Service Request.
●
Status
—
Reports the buffer position of the next sample that
DriverLINX will write into a buffer.
●
Stop
—
Terminates an analog output data-acquisition task.
●
Message
—
DriverLINX displays a pop-up dialog box for the user
containing the text for the current DriverLINX error message.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com