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diff --git a/contrib/ntp/html/refclock.htm b/contrib/ntp/html/refclock.htm new file mode 100644 index 0000000..5747e3f --- /dev/null +++ b/contrib/ntp/html/refclock.htm @@ -0,0 +1,126 @@ +<HTML><HEAD><TITLE> +Reference Clock Drivers +</TITLE></HEAD><BODY><H3> +Reference Clock Drivers +</H3> + +<IMG ALIGN=LEFT SRC=pic/tardisa.gif>From top: + +<UL> + +<LI>Austron 2100A GPS Receiver with LORAN-C assist</LI> +<LI>Austron 2000 LORAN-C Receiver></LI> +<LI>Spectracom 8170 WWVB Receiver</LI> +<LI>Hewlett Packard 5061A Cesium Beam Standard</LI> + +</UL> + +<br clear=left> +The Tardis +<hr> + +<H4>Reference Clock Drivers</H4> + +Support for most of the commonly available radio and modem clocks is +included in the default configuration of the NTP daemon for Unix +<TT>ntpd</TT>. Individual clocks can be activated by configuration file +commands, specifically the <TT>server</TT> and <TT>fudge</TT> commands +described in the <A HREF=ntpd.htm><TT>ntpd</TT> program manual +page</A>. The following discussion presents Information on how to select +and configure the device drivers in a running Unix system. + +<P>Radio and modem clocks by convention have addresses in the form +127.127.<I>t.u</I>, where <I>t</I> is the clock type and <I>u</I> is a +unit number in the range 0-3 used to distinguish multiple instances of +clocks of the same type. Most of these clocks require support in the +form of a serial port or special bus peripheral, but some can work +directly from the audio codec found in some workstations. The particular +device is normally specified by adding a soft link +<TT>/dev/device<I>u</I></TT> to the particular hardware device involved, +where <I><TT>u</TT></I> correspond to the unit number above. + +<P>Following is a list showing the type and title of each driver +currently implemented. The compile-time identifier for each is shown in +parentheses. Click on a selected type for specific description and +configuration documentation, including the clock address, reference ID, +driver ID, device name and speed, and features (line disciplines, etc.). +For those drivers without specific documentation, please contact the +author listed in the <A HREF=copyright.htm>copyright page</A>. + +<P><A HREF=driver1.htm>Type 1</A> Undisciplined Local Clock +(<TT>LOCAL</TT>) +<BR><A HREF=driver2.htm>Type 2</A> Trak 8820 GPS Receiver +(<TT>GPS_TRAK</TT>) +<BR><A HREF=driver3.htm>Type 3</A> PSTI/Traconex 1020 WWV/WWVH +Receiver +(<TT>WWV_PST</TT>) +<BR><A HREF=driver4.htm>Type 4</A> Spectracom 8170 and Netclock/2 WWVB +Receivers (<TT>WWVB_SPEC</TT>) +<BR><A HREF=driver5.htm>Type 5</A> TrueTime GPS/GOES/OMEGA Receivers +(<TT>TRUETIME</TT>) +<BR><A HREF=driver6.htm>Type 6</A> IRIG Audio Decoder +(<TT>IRIG_AUDIO</TT>) +<BR><A HREF=driver7.htm>Type 7</A> CHU Audio/Modem Decoder +(<TT>CHU</TT>) +<BR><A HREF=driver8.htm>Type 8</A> Generic Reference Driver +(<TT>PARSE</TT>) +<BR><A HREF=driver9.htm>Type 9</A> Magnavox MX4200 GPS Receiver +(<TT>GPS_MX4200</TT>) +<BR><A HREF=driver10.htm>Type 10</A> Austron 2200A/2201A GPS Receivers +(<TT>GPS_AS2201</TT>) +<BR><A HREF=driver11.htm>Type 11</A> Arbiter 1088A/B GPS Receiver +(<TT>GPS_ARBITER</TT>) +<BR><A HREF=driver12.htm>Type 12</A> KSI/Odetics TPRO/S IRIG Interface +(<TT>IRIG_TPRO</TT>) +<BR>Type 13 Leitch CSD 5300 Master Clock Controller +(<TT>ATOM_LEITCH</TT>) +<BR>Type 14 EES M201 MSF Receiver (<TT>MSF_EES</TT>) +<BR><A HREF=driver5.htm>Type 15</A> * TrueTime generic receivers +<BR>Type 16 Bancomm GPS/IRIG Receiver (<TT>GPS_BANCOMM</TT>) +<BR>Type 17 Datum Precision Time System (<TT>GPS_DATUM</TT>) +<BR><A HREF=driver18.htm>Type 18</A> NIST Modem Time Service +(<TT>ACTS_NIST</TT>) +<BR><A HREF=driver19.htm>Type 19</A> Heath WWV/WWVH Receiver +(<TT>WWV_HEATH</TT>) +<BR><A HREF=driver20.htm>Type 20</A> Generic NMEA GPS Receiver +(<TT>NMEA</TT>) +<BR>Type 21 TrueTime GPS-VME Interface (<TT>GPS_VME</TT>) +<BR><A HREF=driver22.htm>Type 22</A> PPS Clock Discipline +(<TT>PPS</TT>) +<BR><A HREF=driver23.htm>Type 23</A> PTB Modem Time Service +(<TT>ACTS_PTB</TT>) +<BR><A HREF=driver24.htm>Type 24</A> USNO Modem Time Service +(<TT>ACTS_USNO</TT>) +<BR><A HREF=driver5.htm>Type 25</A> * TrueTime generic receivers +<BR><A HREF=driver26.htm>Type 26</A> Hewlett Packard 58503A GPS +Receiver +(<TT>GPS_HP</TT>) +<BR><A HREF=driver27.htm>Type 27</A> Arcron MSF Receiver +(<TT>MSF_ARCRON</TT>) +<BR><A HREF=driver28.htm>Type 28</A> Shared memory driver +(<TT>SHM</TT>) +<BR><A HREF=driver29.htm>Type 29</A> Trimble Navigation Palisade GPS (<TT>GPS_PALISADE</TT>) +<BR><A HREF=driver30.htm>Type 30 Motorola UT Oncore GPS +(<TT>GPS_ONCORE</TT>) +<BR>Type 31 Rockwell Jupiter GPS (<TT>GPS_JUPITER</TT>) +<BR><A HREF=driver34.htm>Type 34</A> Ultralink WWVB receivers + +<P>* All TrueTime receivers are now supported by one driver, type 5. +Types +15 and 25 will be retained only for a limited time and may be reassigned +in future. + +<P>Additional Information + +<P><A HREF=prefer.htm>Mitigation Rules and the <TT>prefer</TT> +Keyword</A> +<BR><A HREF=rdebug.htm>Debugging Hints for Reference Clock Drivers</A> +<BR><A HREF=ldisc.htm>Line Disciplines and Streams Drivers</A> +<BR><A HREF=pps.htm>Pulse-per-second (PPS) Signal Interfacing</A> +<BR><A HREF=howto.htm>How To Write a Reference Clock Driver</A> +<BR><A HREF=index.htm>The Network Time Protocol (NTP) +Distribution </A> + +<hr><a href=index.htm><img align=left src=pic/home.gif></a><address><a +href=mailto:mills@udel.edu> David L. Mills <mills@udel.edu></a> +</address></a></body></html> |
