Lines Matching +full:pre +full:- +full:calibration +full:- +full:data
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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 …dio codec or sound card with sampling rate 8 kHz and μ-law companding to demodulate the data. T…
25 …calibration, the driver is accurate within 1 ms relative to the broadcast time when tracking a sta…
26 …calibration relative to the PPS signal from a GPS receiver, the mean offset with a 2.4-G…
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 …data signal is determined from the matched filter subcarrier envelope using a pulse-width discrimi…
37 …-static miscellaneous bits, such as DST indicator, leap second warning and DUT1 correction. In thi…
38 <h4>Maximum-Likelihood Decoder</h4>
39 …data bits. The bits are correlated with the bits corresponding to each of the valid decimal digits…
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 …data demodulation functions operate using the subcarrier clock, which is independent of the epoch.…
46 …le to noise and stale data, especially when coming up after a long fade. Therefore, a candidate is…
49 …-sense of noise alone. The signal quality metric depends on the minute pulse amplitude and SNR mea…
55 …-GHz P4 running FreeBSD 6.1. For these measurements the computer clock was disciplined within a fe…
56 …the receiver at Newark, DE, varies over 9.0-9.3 ms. In addition, the receiver contributes 4.7 ms a…
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><…
81 <h4>Monitor Data</h4>
85 …>du</tt> are decoded from the received data and are in fixed-length format. The remaining fields a…
90 …<dd>The quality character is a four-bit hexadecimal code showing which alarms have been raised. Ea…
97 <dd>Error alarm. More than 40 data bit errors were found in the last minute.</dd>
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…
119 …l to determine the quality of the data signal received in the most recent minute. It is normal to …
127 …k was set on the last minute, the AGC is safely in the middle ot the range 0-255, and the receiver…
141 …<dd>Specifies the microphone port if set to zero or the line-in port if set to one. It does not se…