Lines Matching +full:reference +full:- +full:select
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26 <p>This page describes several statistics provided in the NTP specification and reference implement…
29 …<li>Roundtrip system and network delay measured by the on-wire protocol. This is call <em>roundtri…
38 …y the on-wire protocol, as described below. The algorithms of the box labeled Selection and Combin…
40 …acterized by the offset θ and delay δ samples measured by the on-wire protocol, as des…
45 …il the source is no longer reachable. Reachability is determined by an eight-bit shift register, w…
47 …, older samples are no longer selectable. This applies also to the clock select algorithm. Once th…
50 …ent determines the system performance using a peer population including reference clocks and remot…
51 …istance statistic is computed as one-half the <em> root delay</em> of the primary source of time; …
55 …select threshold</em>, by default 1.5 s, but can be changed according to client preference using t…
56 <p>The root distance statistic is used by the select, cluster and mitigation algorithms. In this re…
59 …he maximum clock offset for each of possibly several sources. The clock select algorithm computes…
62 …<li>Root distance is used by the mitigation algorithm to select the system peer from among the clu…
64 … select the system peer as the source with the minimum root distance and thus the minimum maximum …
65 …e clock combine algorithm. System offset is best interpreted as the maximum-likelihood estimate o…
66 <p>The maximum system error, or <em>system distance</em>, is computed as one-half the system delay …