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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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4
prod/doc/index.html
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@ -64,7 +64,7 @@ Defective devices can be discarded or retained for a deeper analysis.
<DD>Device Under Test. An <B>atben</B> or <B>atusb</B> board that <DD>Device Under Test. An <B>atben</B> or <B>atusb</B> board that
has left SMT, and is being prepared for testing or in the process has left SMT, and is being prepared for testing or in the process
of being tested. of being tested.
<DT>Reference</DT> <DT>Reference device</DT>
<DD>An <B>atben</B> or <B>atusb</B> device that is known to work and <DD>An <B>atben</B> or <B>atusb</B> device that is known to work and
and that acts as a peer for RF communication with the DUT. and that acts as a peer for RF communication with the DUT.
<DT>SMT</DT> <DT>SMT</DT>
@ -93,7 +93,7 @@ production and test process:
<P> <P>
<HR> <HR>
Last update: 2011-05-18&nbsp;&nbsp;<I>Werner Almesberger</I> Last update: 2011-05-19&nbsp;&nbsp;<I>Werner Almesberger</I>
<HR> <HR>
</BODY> </BODY>
</HTML> </HTML>

12
prod/doc/setup.html
View File

@ -56,8 +56,8 @@ echo 192.168.1.202 jlime >>/etc/hosts
<H2>Ben system setup</H2> <H2>Ben system setup</H2>
The configuration setting described in this section are lost on each 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 reset or reboot and either need to be entered again. Alternatively,
running at boot time has to be written. 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 atrf-xtal 1000 >ben.xtal
</PRE> </PRE>
<P> <P>
Note that this value depends on the tolerance of the crystal in the Ben This takes about 5 seconds.
and is also affected by temperature. The above accuracy can therefore <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 only be obtained if this measurement is performed individually on each
Ben, and if a stable temperature is maintained. 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; Up: <A href="index.html">Production and testing</A>&nbsp;
Next: <A href="flash.html">Flashing (<B>atusb</B> only)</A>&nbsp; Next: <A href="flash.html">Flashing (<B>atusb</B> only)</A>&nbsp;
<HR> <HR>
Last update: 2011-05-18&nbsp;&nbsp;<I>Werner Almesberger</I> Last update: 2011-05-19&nbsp;&nbsp;<I>Werner Almesberger</I>
<HR> <HR>
</BODY> </BODY>
</HTML> </HTML>