Lines Matching +full:oscillator +full:- +full:stable +full:- +full:time
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13 <!-- #BeginDate format:En2m -->15-Nov-2012 06:42<!-- #EndDate -->
20 Autotune Port: <tt>/dev/icom</tt>; 1200/9600 baud, 8-bits, no parity<br>
23 …time using shortwave radio transmissions from NIST time/frequency stations <a href="http://www.bld…
24 <p>The driver requires an audio codec or sound card with sampling rate 8 kHz and μ-law compandin…
25 …time when tracking a station. However, variations up to 0.3 ms can be expected due to diurnal vari…
26 …r, the mean offset with a 2.4-GHz P4 running FreeBSD 6.1 is generally within 0.1 ms short-term wit…
30 …-kHz μ-law companded codec samples using maximum-likelihood techniques which exploit the consid…
31 …ecision radio clock for WWV transmissions. Electrical Engineering Report 97-8-1, University of Del…
34 …-Hz pulses and 100-Hz subcarrier are first separated using a 600-Hz bandpass filter centered on 11…
35 …-Hz subcarrier relative to the second pulse is fixed at the transmitter; however, the audio stage …
36 …-width discriminator. The discriminator samples the I channel at 15 ms (<i>n</i>), 200 ms (<i>s</…
37 …-static miscellaneous bits, such as DST indicator, leap second warning and DUT1 correction. In thi…
38 <h4>Maximum-Likelihood Decoder</h4>
39 …ssociated with the maximum over all averaged values then becomes the maximum-likelihood candidate …
40 …-likelihood digit, likelihood vector and other related data. The maximum-likelihood digit for each…
41 …-likelihood digit. If a digit likelihood exceeds the decision level and compares with previous dig…
43 …-lock loop (FLL) which operates independently of the data recovery functions. The maximum value of…
45 …. The decoder is phase-locked to the epoch in such a way that, when the clock state machine has re…
46 … after a long fade. Therefore, a candidate is considered valid only if the 5-ms signal amplitude a…
48 …stable and accurately determined, since in many applications the shortwave radio will be tuned to …
49 …ry scrap of signal information, but has to be careful to avoid making pseudo-sense of noise alone.…
52 <p>It is the intent of the design that the accuracy and stability of the indicated time be limited …
55 <p>The figure was constructed using a 2.4-GHz P4 running FreeBSD 6.1. For these measurements the co…
56 …the receiver at Newark, DE, varies over 9.0-9.3 ms. In addition, the receiver contributes 4.7 ms a…
62 …eptable. A consequence of this design is that, once the clock is set, the time and frequency are d…
63 …;s per second, which makes the driver appear less likely for selection as time goes on. Eventually…
65 …-V standard, which is a bidirectional serial bus operating at TTL levels. The bus can be connected…
66 …n. If the <tt>/dev/icom</tt> link is not present or the open fails or the CI-V bus is inoperative,…
67 …-minute rotation to build a database of current propagation conditions for all signals that can be…
71 … when the ray path is in moonlight (0100-1300 UTC) and the higher frequencies when the path is in …
73 …r is not disciplining the system clock. If the debugging trace feature (<tt>-d</tt> on the <tt>ntp…
78 … <tt>WH</tt> for WWVH) and frequency (2, 5, 10, 15 or 20), <tt>score</tt> 32-bit shift register re…
79 <pre><tt>wwv5 000d 111 5753 3967/20.1 3523/10.2 WV20 bdeff 100 8348/30.0 WH20 0000 1 22/-12.4</tt><…
85 …re decoded from the received data and are in fixed-length format. The remaining fields are in vari…
90 …<dd>The quality character is a four-bit hexadecimal code showing which alarms have been raised. Ea…
99 …<dd>Compare alarm. A maximum-likelihood digit failed to agree with the current associated clock di…
103 …<dd>The timecode format itself is self explanatory. Since the driver latches the on-time epoch dir…
107 …t>D</tt> when standard time or daylight time is in effect, respectively. The state is <tt>I</tt> o…
109 …<dd>The DUT sign and magnitude shows the current UT1 offset relative to the displayed UTC time, in…
123 …time is the interval between frequency updates in powers of two to a maximum of 1024 s. Attainment…
127 …time are displayed along with no leap warning, standard time and DUT +0.3 s. The clock was set on …
130 <dt><tt>time1 <i>time</i></tt></dt>
132 <dt><tt>time2 <i>time</i></tt></dt>
141 …<dd>Specifies the microphone port if set to zero or the line-in port if set to one. It does not se…