Lines Matching +full:active +full:- +full:interval +full:- +full:ms
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
4 <meta http-equiv="content-type" content="text/html;charset=iso-8859-1">
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 …nected via an optional attenuator and cable to either the microphone or line-in port of a workstat…
24 <p>The driver requires an audio codec or sound card with sampling rate 8 kHz and μ-law compandin…
25 …ms relative to the broadcast time when tracking a station. However, variations up to 0.3 ms can be…
26 … with a 2.4-GHz P4 running FreeBSD 6.1 is generally within 0.1 ms short-term with 0.4 ms jitter. T…
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…
44 …interval is 8 seconds, in order to compensate for intrinsic codec clock frequency offsets up to 12…
45 …r, the data decoding functions are driven by the epoch. The decoder is phase-locked to the epoch i…
46 … the 5-ms signal amplitude and SNR are above thresholds. In addition, the system clock is not…
49 …ry scrap of signal information, but has to be careful to avoid making pseudo-sense of noise alone.…
53 …of the sunspot cycle ending in October, 2006. Variations up to ±0.4 ms can be expected due …
55 <p>The figure was constructed using a 2.4-GHz P4 running FreeBSD 6.1. For these measurements the co…
56 …-9.3 ms. In addition, the receiver contributes 4.7 ms and the 600-Hz bandpass filter 0.9 ms. With …
58 …ve minutes with good signals and low jitter. If the autotune function is active, the driver will r…
63 …interval, but with increasing dispersion. Assuming the system clock frequency can be disciplined w…
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 …metric as described above. Each of the five frequencies are probed in a five-minute rotation to bu…
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…
111 …<dd>Before the clock is set, the interval since last set is the number of minutes since the driver…
123 …<dd>The averaging time is the interval between frequency updates in powers of two to a maximum of …
127 …-255, and the receiver is tracking WWV on 20 MHz. Good receiving conditions prevail, as indicated …
141 …<dd>Specifies the microphone port if set to zero or the line-in port if set to one. It does not se…