Added a couple of sentences about async acquisition and the
two modes cards do it and then mentioned our new board_info.
This commit is contained in:
parent
47b3edd6e2
commit
2d0ed0442c
1 changed files with 20 additions and 0 deletions
|
@ -132,6 +132,26 @@
|
|||
This technique is used in programs such
|
||||
as <command>ktimetrace</command> or <command>comedirecord</command>.
|
||||
</para>
|
||||
<para>
|
||||
There are two different ways how a sequence of channels is
|
||||
measured during asynchronous acquisition (see also the Figure in
|
||||
the introduction):
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
The channels are measured with the help
|
||||
of a multiplexer which switches to the next channel after each measurement.
|
||||
This means that the sampling rate is divided by the number
|
||||
of channels.
|
||||
</listitem>
|
||||
<listitem>
|
||||
The channels are all measured at the same time, for example
|
||||
when every channel has its own converter. In this case the
|
||||
sampling rate need not to be divided by the number of channels.
|
||||
</listitem>
|
||||
</itemizedlist>
|
||||
How your &comedi; device handles the asynchronous acquisition can be found out
|
||||
with the command <command>comedi_board_info -v</command>.
|
||||
</para>
|
||||
<para>
|
||||
The program <command>tut3.c</command> demonstrates the
|
||||
asynchronous acquisition. The general strategy is always
|
||||
|
|
Loading…
Add table
Reference in a new issue