For example, some A/D hardware must <emphasis>multiplex</emphasis>
the conversions from different input channels onto
one single A/D converter. Thus the conversions are done serially
- in time (as shown on the <link linkend="fig-acq-seq">Figure</link>).
+ in time (as shown in <xref linkend="fig-acq-seq"/>).
Other cards have the hardware to do two or more acquisitions in
parallel, and can perform all the conversions in a scan simultaneously.
The begin of each conversion is <quote>triggered</quote> by