Lines Matching +full:pre +full:- +full:calibration
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 -->17-Jul-2014 02:17<!-- #EndDate -->
20 Modem Port: <tt>/dev/chu<i>u</i></tt>; 300 baud, 8-bits, no parity<br>
21 Autotune Port: <tt>/dev/icom</tt>; 1200/9600 baud, 8-bits, no parity<br>
25 …from Canadian time/frequency station <a href="http://inms-ienm.nrc-cnrc.gc.ca/time_services/shortw…
31 …-compatible, 300-b/s modem or modem chip, as described on the <a href="../pps.html">Pulse-per-seco…
32 …calibration, the driver is accurate within 1 ms relative to the broadcast time when tracking a sta…
33 …calibration relative to the PPS signal from a GPS receiver, the mean offset with a 2.4-G…
37 <p>The driver processes 8-kHz μ-law companded codec samples using maximum-likelihood techniques …
38 …-ienm.nrc-cnrc.gc.ca/time_services/chu_e.html">CHU website</a>. A timecode is assembled when all b…
40 …-likelihood UART, burst assembler and majority decoder. The DSP modem demodulates Bell 103 modem a…
41 …-stage shift registers, one for each of eight phases of the 300-b/s bit clock. At each phase a new…
42 …-robin order as the phases of each bit arrive. At the end of each bit all eight phases are searche…
43 <p>The burst assembler processes characters either from the maximum-likelihood UART or directly fro…
44 …-character blocks, each block representing ten 4-bit BCD digits. The format B blocks sent in secon…
45 …B burst the second block is bit-inverted relative to the first, so a perfect burst of five 8-bit c…
47 …-bit code combination that might be decoded at that position. In order to use the character timest…
49 … is the distance for that position and the corresponding code is the maximum-likelihood digit. If …
50 <p>The result of the majority decoder is a nine-digit timecode representing the maximum-likelihood …
51 …face can handle is 60. These are processed using a median filter and trimmed-mean average, so the …
53 …-V standard, which is a bidirectional serial bus operating at TTL levels. The bus can be connected…
54 …-kHz offset is useful with a narrowband SSB filter where the passband includes the carrier an…
55 …bursts are received from one or more stations, the driver operates in a five-minute cycle. During …
57 …ram is not discipline the system clock. If the debugging trace feature (<tt>-d</tt> on the <tt>ntp…
60 …-11) and <tt>b</tt> the burst distance (0-40). Good bursts will have spans of a 800 or more and th…
61 …-V interface for ICOM radios is active, a debug level greater than 1 will produce a trace of the C…
64 <pre>
78 agc audio gain (0-255)
82 </pre>
83 …d are in fixed-length format. The <tt>agc</tt> and <tt>lset</tt> fields, as well as the following …
88 …<dd>The quality character is a four-bit hexadecimal code showing which alarms have been raised dur…
114 code, if the CI-V interface is active, or <tt>CHU</tt> if not. The radio
135 …s the audio input port, where 0 is the mike port (default) and 1 is the line-in port. It does not …