This procedure is called from the initialization procedure in order to
set up the state variables for the primary clock. The value for
peer.precision is determined from the radio clock specification and
hardware interface. The value for peer.rootdispersion is nominally ten
times the inherent maximum error of the radio clock; for instance,
<$E10~mu s> for a calibrated atomic clock, 10 ms for a WWVB or GOES
radio clock and 100 ms for a less accurate WWV radio clock.
begin clock-instantiation procedure
<$Eroman peer.config~<<-~1>; /* copy
variables */
<$Eroman peer.peeraddr~<<-~0~undefined>;
<$Eroman peer.peerport~<<-~0~(not~used)>;
<$Eroman peer.hostaddr~<<-~0~(not~used)>;
<$Eroman peer.hostport~<<-~0~(not~used)>;
<$Eroman peer.leap~<<-~11 sub 2>;
<$Eroman peer.mode~<<-~0~(not~used)>;
<$Eroman peer.stratum~<<-~0>;
<$Eroman peer.peerpoll~<<-~0~(undefined)>;
<$Eroman peer.precision~<<-~clock~precision>;
<$Eroman peer.rootdelay~<<-~0>;
<$Eroman peer.rootdispersion~<<-~clock~dispersion>;
<$Eroman peer.refid~<<-~0~(not~used)>;
<$Eroman peer.reftime~<<-~0~(undefined)>;
<$Eroman peer.timer~<<-~0>;
<$Eroman peer.delay~<<-~0~(undefined)>;
<$Eroman peer.offset~<<-~0~(undefined)>;
call clear; /* initialize
association */
end clock-instantiation procedure;
In some configurations involving a calibrated atomic clock or LORAN-C
receiver, the primary reference source may provide only a seconds pulse,
but lack a complete timecode from which the numbering of the seconds,
etc., can be derived. In these configurations seconds numbering can be
derived from other sources, such as a radio clock or even other NTP
peers. In these configurations the primary clock variables should
reflect the primary reference source, not the seconds-numbering source;
however, if the seconds-numbering source fails or is known to be
operating incorrectly, updates from the primary reference source should
be suppressed as if it had failed.
Clear Procedure
The clear procedure is called when some event occurs that results in a
significant change in reachability state or potential disruption of the
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