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prod/doc/: added atrf-xtal run time; some minor cleanup

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This commit is contained in:
Werner Almesberger
2011-05-19 16:56:34 -03:00
parent 251a749515
commit aa75581e8d
2 changed files with 9 additions and 7 deletions
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12
prod/doc/setup.html
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@@ -56,8 +56,8 @@ echo 192.168.1.202 jlime >>/etc/hosts
<H2>Ben system setup</H2>
The configuration setting described in this section are lost on each
reset or reboot and either need to be entered again or a setup script
running at boot time has to be written.
reset or reboot and either need to be entered again. Alternatively,
a setup script running at boot time can be written.
<!-- ---------------------------------------------------------------------- -->
@@ -150,8 +150,10 @@ clock count with an accuracy of about +/&minus;20 ppm:
atrf-xtal 1000 >ben.xtal
</PRE>
<P>
Note that this value depends on the tolerance of the crystal in the Ben
and is also affected by temperature. The above accuracy can therefore
This takes about 5 seconds.
<P>
Note that the result depends on the tolerance of the crystal in the Ben
and is also affected by temperature. Good accuracy can therefore
only be obtained if this measurement is performed individually on each
Ben, and if a stable temperature is maintained.
@@ -167,7 +169,7 @@ Ben, and if a stable temperature is maintained.
Up: <A href="index.html">Production and testing</A>&nbsp;
Next: <A href="flash.html">Flashing (<B>atusb</B> only)</A>&nbsp;
<HR>
Last update: 2011-05-18&nbsp;&nbsp;<I>Werner Almesberger</I>
Last update: 2011-05-19&nbsp;&nbsp;<I>Werner Almesberger</I>
<HR>
</BODY>
</HTML>