If an analog input is used for the trigger, specify the trigger level, analog input channel, and slope. Use analog output channel 1 for setting the trigger level.
Note: When using analog input channel 1 for a trigger, do not use this channel for any other purpose.
When an input signal on the selected channel of the proper slope (rising or falling voltage) crosses the trigger level, the conversion process begins.
Stopping Conversions
To stop a conversion, use either a software command, an N samples counter, or a combination of a trigger and an N samples counter.
Use the N samples counter to specify the number of samples that you want to capture.
When the trigger is used to stop a conversion, and the N samples counter is used, a post- triggering function occurs. In this mode, software is used to start conversions and continue indefinitely until a trigger event occurs. When a trigger event occurs, N additional samples are captured.
Rate Generator
The UDAS unit contains an
The I/O connector has a rate generator output pin that is driven by either the Analog Input Rate Generator or the Analog Output Rate Generator.
Channel Scanner
When the channel scanner is enabled, immediately after the conversion on the current channel finishes, the next analog input channel to be converted is automatically selected.
The UDAS device incorporates a 0 to N scanner. This allows analog conversions on all of the input channels from channel 0 to channel N, where the value of N is programmable.
The scanner selects each channel for conversion, beginning with channel 0, incrementing to channel N. After the conversion on channel N is complete, the scanner selects channel 0 and the process repeats.