<div class="content"><p>The W32TIME_CONFIGURATION_ADVANCED structure defines the
advanced configuration data of the <a href="cb180d77-0c53-490e-9d37-df7576ef5465#gt_9846d08d-ad98-4bb9-a1e7-1f0bfbdd1113" data-linktype="relative-path">time service</a>.<a id="Appendix_A_Target_13"></a><a aria-label="Product behavior note 13" href="bb576d39-587b-484a-86a4-e1d378cf9497#Appendix_A_13" data-linktype="relative-path">&lt;13&gt;</a></p><p>The structure is defined to match the advanced configuration
of the <a href="cb180d77-0c53-490e-9d37-df7576ef5465#gt_43e51d0a-ac6a-4662-a99a-8f3029b78caf" data-linktype="relative-path">W32Time</a>
implementation. Fields in the structure that are not valid in other
implementations SHOULD have their corresponding configuration-setting type
fields set to W32TIME_CONFIGURATION_SETTING_UNDEFINED. For more information on
W32Time, see <a href="https://go.microsoft.com/fwlink/?LinkId=90586" data-linktype="external">[WTSREF]</a>.</p><dl>
<dd>
<div><pre> typedef struct {
   unsigned __int32 ulSize;
   unsigned __int32 ulFrequencyCorrectRate;
   unsigned __int32 ulPollAdjustFactor;
   unsigned __int32 ulLargePhaseOffset;
   unsigned __int32 ulSpikeWatchPeriod;
   unsigned __int32 ulLocalClockDispersion;
   unsigned __int32 ulHoldPeriod;
   unsigned __int32 ulPhaseCorrectRate;
   unsigned __int32 ulUpdateInterval;
   unsigned __int32 ulFrequencyCorrectRateFlag;
   unsigned __int32 ulPollAdjustFactorFlag;
   unsigned __int32 ulLargePhaseOffsetFlag;
   unsigned __int32 ulSpikeWatchPeriodFlag;
   unsigned __int32 ulLocalClockDispersionFlag;
   unsigned __int32 ulHoldPeriodFlag;
   unsigned __int32 ulPhaseCorrectRateFlag;
   unsigned __int32 ulUpdateIntervalFlag;
 } W32TIME_CONFIGURATION_ADVANCED,
  *PW32TIME_CONFIGURATION_ADVANCED;
</pre></div>
</dd></dl><p><b>ulSize:</b>  The size, in bytes, of this
structure.</p><p><b>ulFrequencyCorrectRate:</b>  The <b>FrequencyCorrectRate</b>
element value (see section <a href="1da649d7-3edf-4a9a-98c2-907ecacd1633" data-linktype="relative-path">3.2.1.1</a>).</p><p><b>ulPollAdjustFactor:</b>  The <b>PollAdjustFactor</b>
element value (see section 3.2.1.1).</p><p><b>ulLargePhaseOffset:</b>  An integer that
indicates the threshold that determines whether or not a time sample indicates
a spike, in 100-nanosecond units. If the time difference of the time sample is
more than the value, the sample indicates a possible spike, in which case the
time service changes its state, as specified in section <a href="b4abb4b0-6d6e-41e4-bd41-d54980d0598a" data-linktype="relative-path">2.2.7</a>. For more
information on spike detection, see <a href="https://go.microsoft.com/fwlink/?LinkId=90237" data-linktype="external">[NTP-TR9733i]</a> and <a href="https://go.microsoft.com/fwlink/?LinkId=90236" data-linktype="external">[NTP-TR9733]</a> section
4.</p><p><b>ulSpikeWatchPeriod:</b>  An integer that
indicates the time interval, in seconds, that determines how long the time
service watches a spike condition. If time samples constantly indicate spikes
in this time interval, the time service becomes unsynchronized, in which case
the time service MUST change its state, as described in section 2.2.7. For more
information on spike detection, see [NTP-TR9733i] and [NTP-TR9733] section 4.3.</p><p><b>ulLocalClockDispersion:</b>  An integer
that indicates the local clock dispersion, in seconds. The root dispersion is
set to this value if the time service runs as a primary server, or if the root
dispersion is invalid in the received response. For details on dispersion and
root dispersion, see <a href="https://go.microsoft.com/fwlink/?LinkId=90272" data-linktype="external">[RFC1305]</a>
section 3.2.</p><p><b>ulHoldPeriod:</b>  An integer that
indicates the number of time samples during which the spike detection is
disabled when the time service is in the HOLD state, as specified in section
2.2.7. For more information on the HOLD state, see [NTP-TR9733i] and
[NTP-TR9733] section 4.3. </p><p><b>ulPhaseCorrectRate:</b>  The <b>PhaseCorrectRate</b>
element value (see section 3.2.1.1).</p><p><b>ulUpdateInterval:</b>  The <b>UpdateInterval</b>
element value (see section 3.2.1.1).</p><p><b>ulFrequencyCorrectRateFlag:</b>  An
integer that indicates the source of the configuration setting for <b>ulFrequencyCorrectRate</b>,
as specified in section <a href="cda8dd8e-ef99-4b2d-b747-6077e5d5ddf2" data-linktype="relative-path">2.2.6</a>.</p><p><b>ulPollAdjustFactorFlag:</b>  An integer
that indicates the source of the configuration setting for <b>ulPollAdjustFactor</b>,
as specified in section 2.2.6.</p><p><b>ulLargePhaseOffsetFlag:</b>  An integer
that indicates the source of the configuration setting for <b>ulLargePhaseOffset</b>,
as specified in section 2.2.6.</p><p><b>ulSpikeWatchPeriodFlag:</b>  An integer
that indicates the source of the configuration setting for <b>ulSpikeWatchPeriod</b>,
as specified in section 2.2.6.</p><p><b>ulLocalClockDispersionFlag:</b>  An
integer that indicates the source of the configuration setting for <b>ulLocalClockDispersion</b>,
as specified in section 2.2.6.</p><p><b>ulHoldPeriodFlag:</b>  An integer that
indicates the source of the configuration setting for <b>ulHoldPeriod</b>, as
specified in section 2.2.6.</p><p><b>ulPhaseCorrectRateFlag:</b>  An integer
that indicates the source of the configuration setting for <b>ulPhaseCorrectRate</b>,
as specified in section 2.2.6.</p><p><b>ulUpdateIntervalFlag:</b>  An integer
that indicates the source of the configuration setting for <b>ulUpdateInterval</b>,
as specified in section 2.2.6.</p></div>