1 | <!doctype html public "-//w3c//dtd html 4.0 transitional//en"> |
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2 | <html> |
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3 | <head> |
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4 | <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> |
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5 | <title>Trimble Palisade Receiver</title> |
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6 | </head> |
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7 | <body text="#000000" bgcolor="#FFFFFF" link="#0000FF" vlink="#800080" alink="#FF0000"> |
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8 | |
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9 | <h1> |
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10 | <font size=+2>Trimble Palisade Receiver</font> |
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11 | <hr></h1> |
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12 | |
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13 | <h2> |
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14 | <img SRC="pic/driver29.gif" NOSAVE height=100 width=420></h2> |
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15 | |
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16 | <h2> |
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17 | <font size=+1>Synopsis</font></h2> |
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18 | |
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19 | <table> |
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20 | <tr> |
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21 | <td> |
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22 | <div align=right><tt>Address: </tt></div> |
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23 | </td> |
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24 | |
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25 | <td><b>127.127.29.<i>u</i></b></td> |
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26 | </tr> |
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27 | |
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28 | <tr> |
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29 | <td> |
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30 | <div align=right><tt>Reference ID:</tt></div> |
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31 | </td> |
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32 | |
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33 | <td><a NAME="REFID"></a><b>GPS</b></td> |
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34 | </tr> |
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35 | |
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36 | <tr> |
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37 | <td> |
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38 | <div align=right><tt>Driver ID:</tt></div> |
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39 | </td> |
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40 | |
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41 | <td><b>GPS_PALISADE</b></td> |
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42 | </tr> |
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43 | |
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44 | <tr> |
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45 | <td> |
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46 | <div align=right><tt>Serial Port:</tt></div> |
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47 | </td> |
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48 | |
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49 | <td><b>/dev/palisade<i>u</i></b></td> |
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50 | </tr> |
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51 | |
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52 | <tr> |
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53 | <td> |
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54 | <div align=right><tt><font size=+1>Serial I/O:</font></tt></div> |
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55 | </td> |
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56 | |
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57 | <td><b>9600 baud, 8-bits, 1-stop, odd parity</b></td> |
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58 | </tr> |
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59 | </table> |
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60 | |
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61 | <h2> |
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62 | <font size=+1>Description</font></h2> |
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63 | The <b>refclock_palisade</b> driver supports <a href="http://www.trimble.com/products/ntp">Trimble |
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64 | Navigation's Palisade Smart Antenna GPS receiver</a>. |
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65 | <br>Additional software and information about the Palisade GPS is available |
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66 | from: <a href="http://www.trimble.com/oem/ntp">http://www.trimble.com/oem/ntp</a>. |
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67 | <br>Latest NTP driver source, executables and documentation is maintained |
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68 | at: |
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69 | <a href="ftp://ftp.trimble.com/pub/ntp">ftp://ftp.trimble.com/pub/ntp</a> |
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70 | <p>This documentation describes version 7.12 of the GPS Firmware and version |
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71 | 2.46 (July 15, 1999) and later, of the driver source. |
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72 | <br> |
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73 | <h2> |
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74 | <font size=+1>Operating System Compatibility</font></h2> |
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75 | The Palisade driver has been tested on the following software and hardware |
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76 | platforms: |
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77 | <br> |
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78 | <center><table> |
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79 | <tr> |
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80 | <td VALIGN=CENTER WIDTH="23%">Platform</td> |
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81 | |
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82 | <td VALIGN=CENTER>Operating System</td> |
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83 | |
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84 | <td>NTP Sources</td> |
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85 | |
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86 | <td>Accuracy</td> |
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87 | </tr> |
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88 | |
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89 | <tr> |
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90 | <td VALIGN=CENTER WIDTH="23%">i386 (PC) </td> |
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91 | |
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92 | <td VALIGN=CENTER>Linux</td> |
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93 | |
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94 | <td>NTP Distribution</td> |
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95 | |
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96 | <td>10 us</td> |
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97 | </tr> |
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98 | |
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99 | <tr> |
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100 | <td>i386 (PC) </td> |
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101 | |
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102 | <td>Windows NT</td> |
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103 | |
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104 | <td><a href="ftp://ftp.trimble.com/pub/ntp">ftp://ftp.trimble.com/pub/ntp</a></td> |
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105 | |
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106 | <td>1 ms</td> |
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107 | </tr> |
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108 | |
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109 | <tr> |
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110 | <td VALIGN=CENTER WIDTH="23%">SUN</td> |
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111 | |
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112 | <td VALIGN=CENTER>Solaris 2.x</td> |
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113 | |
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114 | <td>NTP Distribution</td> |
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115 | |
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116 | <td>50 us</td> |
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117 | </tr> |
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118 | |
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119 | <tr> |
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120 | <td VALIGN=CENTER WIDTH="23%">Hewlett-Packard</td> |
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121 | |
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122 | <td VALIGN=CENTER>HPUX 9, 10, 11</td> |
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123 | |
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124 | <td><a href="http://us-support.external.hp.com">http://us-support.external.hp.com</a></td> |
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125 | |
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126 | <td>50 us</td> |
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127 | </tr> |
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128 | |
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129 | <tr> |
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130 | <td>Various</td> |
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131 | |
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132 | <td>Free BSD</td> |
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133 | |
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134 | <td>NTP Distribution</td> |
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135 | |
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136 | <td>20 us</td> |
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137 | </tr> |
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138 | </table></center> |
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139 | |
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140 | <h2> |
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141 | <font size=+1>GPS Receiver</font></h2> |
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142 | The Palisade GPS receiver is an 8-channel smart antenna, housing the GPS |
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143 | receiver, antenna and interface in a single unit, and is designed for rooftop |
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144 | deployment in static timing applications. |
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145 | <p>Palisade generates a PPS synchronized to UTC within +/- 100 ns. |
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146 | The Palisade's external event input with 40 nanosecond resolution is utilized |
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147 | by the Palisade NTP driver for asynchronous precision time transfer. |
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148 | <p>No user initialization of the receiver is required. This driver is compatible |
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149 | with the following versions of Palisade: |
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150 | <br> |
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151 | <center><table> |
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152 | <tr> |
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153 | <td VALIGN=CENTER> |
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154 | <center>Version</center> |
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155 | </td> |
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156 | |
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157 | <td VALIGN=TOP> |
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158 | <center>Event Input</center> |
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159 | </td> |
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160 | |
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161 | <td VALIGN=CENTER> |
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162 | <center>Trimble Part Number</center> |
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163 | </td> |
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164 | </tr> |
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165 | |
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166 | <tr> |
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167 | <td VALIGN=CENTER> |
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168 | <center>7.02</center> |
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169 | </td> |
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170 | |
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171 | <td VALIGN=TOP> |
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172 | <center>No</center> |
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173 | </td> |
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174 | |
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175 | <td VALIGN=CENTER> |
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176 | <center>26664-00</center> |
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177 | </td> |
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178 | </tr> |
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179 | |
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180 | <tr> |
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181 | <td ALIGN=CENTER VALIGN=CENTER> |
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182 | <center>7.02E</center> |
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183 | </td> |
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184 | |
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185 | <td VALIGN=TOP> |
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186 | <center>Yes</center> |
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187 | </td> |
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188 | |
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189 | <td VALIGN=CENTER> |
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190 | <center>26664-10</center> |
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191 | </td> |
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192 | </tr> |
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193 | |
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194 | <tr> |
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195 | <td VALIGN=CENTER> |
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196 | <center>7.12</center> |
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197 | </td> |
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198 | |
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199 | <td VALIGN=TOP> |
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200 | <center>Yes</center> |
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201 | </td> |
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202 | |
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203 | <td VALIGN=CENTER> |
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204 | <center>38158-00</center> |
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205 | </td> |
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206 | </tr> |
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207 | </table></center> |
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208 | |
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209 | <dl> |
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210 | <dl>Note: When using Palisade 26664-00, you must set fudge flag2 to 1 in |
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211 | <b>ntp.conf</b>. |
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212 | See <a href="#Configuration">configuration</a>.</dl> |
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213 | |
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214 | <dl> |
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215 | <h3> |
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216 | <font size=+1>GPS <a NAME="Installation"></a>Installation</font></h3> |
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217 | A location with unobstructed view of the horizon is recommended. Palisade |
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218 | is designed to be securely mounted atop standard 3/4 inch threaded pipe. |
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219 | <p>The 12 conductor (dia. 10 mm) power and I/O cable must be routed |
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220 | from the rooftop site to the NTP server and properly strain relieved. |
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221 | <h3> |
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222 | <font size=+1>GPS <a NAME="Connection"></a>Connection</font></h3> |
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223 | The Palisade is equipped with dual (A & B) RS-422 serial interfaces |
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224 | and a differential TTL PPS output. An RS-232 / RS-422 Interface Module |
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225 | is supplied with the Palisade NTP Synchronization Kit. Palisade <a href="#PortA">port |
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226 | A</a> must be connected to the NTP host server. Maximum antenna cable length |
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227 | is 500 meters. See the <a href="#Pinouts">pinouts</a> table for detailed |
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228 | connection Information. |
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229 | <p>Palisade's <a href="#PortB">port B</a> provides a TSIP (Trimble Standard |
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230 | Interface Protocol) interface for diagnostics, configuration, and monitoring. |
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231 | Port B and the PPS output are not currently used by the Palisade NTP reference |
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232 | clock driver. |
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233 | <br> </dl> |
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234 | </dl> |
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235 | |
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236 | <h2> |
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237 | <font size=+1>O/S Serial Port Configuration</font></h2> |
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238 | The driver attempts to open the device <b><tt><a href="#REFID">/dev/palisade<i>u</i></a></tt></b> |
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239 | where |
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240 | <b><i>u</i></b> is the NTP refclock unit number as defined by the |
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241 | LSB of the refclock address. Valid refclock unit numbers are 0 - |
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242 | 3. |
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243 | <p>The user is expected to provide a symbolic link to an available serial |
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244 | port device. This is typically performed by a command such as: |
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245 | <blockquote><tt>ln -s /dev/ttyS0 /dev/palisade0</tt></blockquote> |
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246 | Windows NT does not support symbolic links to device files. COM<b>x</b>: |
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247 | is used by the driver, based on the refclock unit number, where unit 1 |
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248 | corresponds to COM<b>1</b>: and unit 3 corresponds to COM3: |
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249 | <br> |
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250 | <h2> |
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251 | <a NAME="Configuration"></a><font size=+1>NTP Configuration</font></h2> |
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252 | Palisade NTP configuration file <b><tt>"ntp.conf"</tt></b> with event polling: |
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253 | <br><tt>#------------------------------------------------------------------------------</tt> |
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254 | <br><tt># The Primary reference</tt> |
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255 | <br><tt>server 127.127.29.0 # Trimble Palisade GPS Refclock Unit #0</tt> |
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256 | <br><tt>peer terrapin.csc.ncsu.edu # internet server</tt> |
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257 | <br><tt># Drift file for expedient re-synchronization after downtime or |
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258 | reboot.</tt> |
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259 | <br><tt>driftfile /etc/ntp.drift</tt> |
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260 | <br><tt>#------------------------------------------------------------------------------</tt> |
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261 | <p>Configuration without event polling: |
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262 | <br><tt>#------------------------------------------------------------------------------</tt> |
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263 | <br><tt># The Primary reference</tt> |
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264 | <br><tt>server 127.127.29.0 # Trimble Palisade GPS (Stratum 1).</tt> |
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265 | <br><tt># Set packet delay</tt> |
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266 | <br><tt><a href="#time1">fudge 127.127.29.0 time1 0.020</a></tt> |
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267 | <br><tt># and set flag2 to turn off event polling.</tt> |
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268 | <br><tt><a href="#flag2">fudge 127.127.29.0 flag2 1</a></tt> |
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269 | <br><tt>#------------------------------------------------------------------------------</tt> |
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270 | <br> |
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271 | <h2> |
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272 | <a NAME="TimeTransfer"></a><font size=+1>Time Transfer and Polling</font></h2> |
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273 | Time transfer to the NTP host is performed via the Palisade's comprehensive |
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274 | time packet output. The time packets are output once per second, and whenever |
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275 | an event timestamp is requested. |
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276 | <p>The driver requests an event time stamp at the end of each polling interval, |
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277 | by pulsing the RTS (request to send) line on the serial port. The Palisade |
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278 | GPS responds with a time stamped event packet. |
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279 | <p>Time stamps are reported by the Palisade with respect to UTC time. The |
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280 | GPS receiver must download UTC offset information from GPS satellites. |
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281 | After an initial UTC download, the receiver will always start with correct |
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282 | UTC offset information. |
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283 | <br> |
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284 | <h2> |
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285 | <font size=+1>Run NTP in Debugging Mode</font></h2> |
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286 | The following procedure is recommended for installing and testing a Palisade |
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287 | NTP driver: |
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288 | <ol> |
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289 | <li> |
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290 | Perform initial checkout procedures. Place the GPS receiver outdoors; with |
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291 | clear view of the sky. Allow the receiver to obtain an UTC almanac.</li> |
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292 | |
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293 | <li> |
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294 | Verify presence of timing packets by observing the 1 Hz (PPS) led on the |
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295 | interface module. It should flash once per second.</li> |
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296 | |
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297 | <li> |
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298 | Connect Palisade's port A to the NTP host.</li> |
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299 | |
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300 | <li> |
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301 | Configure NTP and the serial I/O port on the host system.</li> |
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302 | |
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303 | <li> |
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304 | Initially use <tt><a href="#flag2">fudge flag2</a></tt> in <b><a href="#Configuration">ntp.conf</a>,</b> |
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305 | to disable event polling (see configuration).</li> |
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306 | |
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307 | <li> |
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308 | Run NTP in debug mode (-d -d), to observe Palisade_receive events.</li> |
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309 | |
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310 | <li> |
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311 | The driver reports the <a href="#TrackingStatus">tracking status of the |
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312 | receiver</a>. Make sure it is tracking several satellites.</li> |
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313 | |
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314 | <li> |
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315 | Remove fudge flag2 and restart <b>ntpd</b> in debug mode to observe palisade_receive |
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316 | events.</li> |
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317 | |
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318 | <li> |
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319 | If event polling fails, verify the <a href="#Pinouts">connections</a> and |
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320 | that the host hardware supports RTS control.</li> |
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321 | </ol> |
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322 | |
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323 | <h2> |
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324 | <font size=+1>Event Logging</font></h2> |
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325 | System and Event log entries are generated by NTP to report significant |
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326 | system events. Administrators should monitor the system log to observe |
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327 | NTP error messages. Log entries generated by the Palisade NTP reference |
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328 | clock driver will be of the form: |
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329 | <blockquote> |
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330 | <pre>Nov 14 16:16:21 terrapin ntpd[1127]: Palisade #0: <i>message</i></pre> |
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331 | </blockquote> |
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332 | |
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333 | <h2> |
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334 | <font size=+1>Fudge Factors</font></h2> |
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335 | |
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336 | <dl> |
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337 | <dt> |
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338 | <a NAME="time1"></a><tt><font size=+1><a href="#Configuration">time1 <i>time</i></a></font></tt></dt> |
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339 | |
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340 | <dd> |
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341 | Specifies the time offset calibration factor, in seconds and fraction, |
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342 | with default 0.0. If event capture is not used, time1 should be set to |
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343 | 20 milliseconds to correct serial line and operating system delays incurred |
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344 | in capturing time stamps from the synchronous packets.</dd> |
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345 | |
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346 | <dt> |
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347 | <tt><font size=+1>stratum <i>number</i></font></tt></dt> |
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348 | |
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349 | <dd> |
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350 | Specifies the driver stratum, in decimal from 0 to 15, with default 0.</dd> |
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351 | |
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352 | <dt> |
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353 | <tt><font size=+1><a href="#REFID">refid <i>string</i></a></font></tt></dt> |
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354 | |
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355 | <dd> |
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356 | Specifies the driver reference identifier, <b>GPS</b>.</dd> |
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357 | |
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358 | <dt> |
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359 | <a NAME="flag2"></a><tt><font size=+1><a href="#Configuration">flag2 0 |
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360 | | 1</a></font></tt></dt> |
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361 | |
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362 | <dd> |
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363 | When set to 1, driver does not use hardware event capture. The synchronous |
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364 | packet output by the receiver at the beginning of each second is time stamped |
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365 | by the driver. If triggering the event pulse fails, the driver falls back |
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366 | to this mode automatically.</dd> |
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367 | </dl> |
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368 | |
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369 | <h2> |
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370 | <font size=+1>DEFINEs</font></h2> |
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371 | The following constants are defined in the driver source code. These defines |
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372 | may be modified to improve performance or adapt to new operating systems. |
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373 | <br> |
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374 | <center><table BORDER > |
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375 | <tr> |
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376 | <td><b>Label</b></td> |
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377 | |
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378 | <td>Definition</td> |
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379 | |
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380 | <td>Default Value</td> |
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381 | </tr> |
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382 | |
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383 | <tr> |
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384 | <td>DEVICE</td> |
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385 | |
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386 | <td>The serial port device to be used by the driver</td> |
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387 | |
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388 | <td>/dev/palisade<b><i>u</i></b></td> |
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389 | </tr> |
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390 | |
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391 | <tr> |
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392 | <td>PRECISION</td> |
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393 | |
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394 | <td>Accuracy of time transfer</td> |
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395 | |
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396 | <td>1 microsecond</td> |
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397 | </tr> |
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398 | |
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399 | <tr> |
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400 | <td>CURRENT_UTC</td> |
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401 | |
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402 | <td>Valid GPS - UTC offset</td> |
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403 | |
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404 | <td>13</td> |
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405 | </tr> |
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406 | |
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407 | <tr> |
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408 | <td>SPEED232</td> |
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409 | |
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410 | <td>Host RS-232 baud rate</td> |
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411 | |
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412 | <td>B9600</td> |
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413 | </tr> |
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414 | |
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415 | <tr> |
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416 | <td>TRMB_MINPOLL </td> |
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417 | |
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418 | <td>Minimum polling interval</td> |
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419 | |
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420 | <td>5 (32 seconds)</td> |
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421 | </tr> |
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422 | |
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423 | <tr> |
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424 | <td>TRMB_MAXPOLL</td> |
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425 | |
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426 | <td>Maximum interval between polls</td> |
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427 | |
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428 | <td>7 (128 seconds)</td> |
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429 | </tr> |
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430 | </table></center> |
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431 | |
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432 | <h2> |
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433 | <a NAME="DataFormat"></a><font size=+1>Data Format</font></h2> |
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434 | Palisade port A can output two synchronous time packets. The NTP driver |
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435 | can use either packet for synchronization. Packets are formatted as follows: |
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436 | <h3> |
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437 | <b><font size=+0>Packet 8F-AD (Primary NTP Packet)</font></b></h3> |
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438 | |
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439 | <center><table> |
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440 | <tr> |
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441 | <td>Byte</td> |
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442 | |
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443 | <td>Item</td> |
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444 | |
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445 | <td>Type</td> |
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446 | |
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447 | <td>Meaning</td> |
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448 | </tr> |
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449 | |
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450 | <tr> |
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451 | <td>0</td> |
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452 | |
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453 | <td>Sub-Packet ID</td> |
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454 | |
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455 | <td>BYTE</td> |
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456 | |
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457 | <td>Subcode 0xAD</td> |
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458 | </tr> |
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459 | |
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460 | <tr> |
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461 | <td>1 - 2</td> |
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462 | |
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463 | <td>Event Count</td> |
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464 | |
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465 | <td>INTEGER</td> |
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466 | |
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467 | <td>External event count recorded (0 = PPS)</td> |
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468 | </tr> |
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469 | |
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470 | <tr> |
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471 | <td>3 - 10</td> |
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472 | |
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473 | <td>Fractional Second</td> |
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474 | |
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475 | <td>DOUBLE</td> |
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476 | |
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477 | <td>Time elapsed in current second (s)</td> |
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478 | </tr> |
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479 | |
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480 | <tr> |
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481 | <td>11</td> |
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482 | |
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483 | <td>Hour</td> |
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484 | |
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485 | <td>BYTE</td> |
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486 | |
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487 | <td>Hour (0 - 23)</td> |
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488 | </tr> |
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489 | |
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490 | <tr> |
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491 | <td>12</td> |
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492 | |
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493 | <td>Minute</td> |
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494 | |
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495 | <td>BYTE</td> |
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496 | |
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497 | <td>Minute (0 - 59)</td> |
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498 | </tr> |
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499 | |
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500 | <tr> |
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501 | <td>13</td> |
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502 | |
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503 | <td>Second</td> |
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504 | |
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505 | <td>BYTE</td> |
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506 | |
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507 | <td>Second (0 - 59; 60 = leap)</td> |
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508 | </tr> |
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509 | |
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510 | <tr> |
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511 | <td>14</td> |
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512 | |
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513 | <td>Day</td> |
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514 | |
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515 | <td>BYTE</td> |
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516 | |
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517 | <td>Date (1 - 31)</td> |
---|
518 | </tr> |
---|
519 | |
---|
520 | <tr> |
---|
521 | <td>15</td> |
---|
522 | |
---|
523 | <td>Month</td> |
---|
524 | |
---|
525 | <td>BYTE</td> |
---|
526 | |
---|
527 | <td>Month (1 - 12)</td> |
---|
528 | </tr> |
---|
529 | |
---|
530 | <tr> |
---|
531 | <td>16 - 17</td> |
---|
532 | |
---|
533 | <td>Year</td> |
---|
534 | |
---|
535 | <td>INTEGER</td> |
---|
536 | |
---|
537 | <td>Year (4 digit)</td> |
---|
538 | </tr> |
---|
539 | |
---|
540 | <tr> |
---|
541 | <td>18</td> |
---|
542 | |
---|
543 | <td>Receiver Status</td> |
---|
544 | |
---|
545 | <td>BYTE</td> |
---|
546 | |
---|
547 | <td>Tracking Status</td> |
---|
548 | </tr> |
---|
549 | |
---|
550 | <tr> |
---|
551 | <td>19</td> |
---|
552 | |
---|
553 | <td>UTC Flags</td> |
---|
554 | |
---|
555 | <td>BYTE</td> |
---|
556 | |
---|
557 | <td>Leap Second Flags</td> |
---|
558 | </tr> |
---|
559 | |
---|
560 | <tr> |
---|
561 | <td>20</td> |
---|
562 | |
---|
563 | <td>Reserved</td> |
---|
564 | |
---|
565 | <td>BYTE</td> |
---|
566 | |
---|
567 | <td>Contains 0xFF</td> |
---|
568 | </tr> |
---|
569 | |
---|
570 | <tr> |
---|
571 | <td>21</td> |
---|
572 | |
---|
573 | <td>Reserved</td> |
---|
574 | |
---|
575 | <td>BYTE</td> |
---|
576 | |
---|
577 | <td>Contains 0xFF</td> |
---|
578 | </tr> |
---|
579 | </table></center> |
---|
580 | |
---|
581 | <blockquote> |
---|
582 | <h4> |
---|
583 | Leap Second Flag Definition:</h4> |
---|
584 | Bit 0: (1) UTC Time is available |
---|
585 | <br>Bits 1 - 3: Undefined |
---|
586 | <br>Bit 4: (1) Leap Scheduled: Leap second pending asserted by GPS |
---|
587 | control segment. |
---|
588 | <br>Bit 5: (1) Leap Pending: set 24 hours before, until beginning |
---|
589 | of leap second. |
---|
590 | <br>Bit 6: (1) GPS Leap Warning: 6 hours before until 6 hours after |
---|
591 | leap event |
---|
592 | <br>Bit 7: (1) Leap In Progress. Only set during the leap second. |
---|
593 | <h4> |
---|
594 | <a NAME="TrackingStatus"></a>Tracking Status Flag Definitions:</h4> |
---|
595 | </blockquote> |
---|
596 | |
---|
597 | <center><table BORDER=0 CELLSPACING=0 WIDTH="712" > |
---|
598 | <tr> |
---|
599 | <td VALIGN=CENTER WIDTH="5%">Code</td> |
---|
600 | |
---|
601 | <td VALIGN=CENTER WIDTH="59%">Meaning</td> |
---|
602 | |
---|
603 | <td>Accuracy</td> |
---|
604 | |
---|
605 | <td>Receiver Mode</td> |
---|
606 | </tr> |
---|
607 | |
---|
608 | <tr> |
---|
609 | <td>0</td> |
---|
610 | |
---|
611 | <td>Receiver is Navigating</td> |
---|
612 | |
---|
613 | <td>+/- 1 us</td> |
---|
614 | |
---|
615 | <td>Self Survey</td> |
---|
616 | </tr> |
---|
617 | |
---|
618 | <tr> |
---|
619 | <td VALIGN=CENTER WIDTH="5%">1</td> |
---|
620 | |
---|
621 | <td VALIGN=CENTER WIDTH="59%">Static 1 Sat. Timing Mode </td> |
---|
622 | |
---|
623 | <td>+/- 1 us</td> |
---|
624 | |
---|
625 | <td>1-D Timing</td> |
---|
626 | </tr> |
---|
627 | |
---|
628 | <tr> |
---|
629 | <td VALIGN=CENTER WIDTH="5%">2</td> |
---|
630 | |
---|
631 | <td VALIGN=CENTER WIDTH="59%">Approximate Time</td> |
---|
632 | |
---|
633 | <td>20 - 50 ms</td> |
---|
634 | |
---|
635 | <td>Acquisition</td> |
---|
636 | </tr> |
---|
637 | |
---|
638 | <tr> |
---|
639 | <td VALIGN=CENTER WIDTH="5%">3</td> |
---|
640 | |
---|
641 | <td VALIGN=CENTER WIDTH="59%">Startup</td> |
---|
642 | |
---|
643 | <td>N/A</td> |
---|
644 | |
---|
645 | <td>Initialization</td> |
---|
646 | </tr> |
---|
647 | |
---|
648 | <tr> |
---|
649 | <td VALIGN=CENTER WIDTH="5%">4</td> |
---|
650 | |
---|
651 | <td VALIGN=CENTER WIDTH="59%">Startup</td> |
---|
652 | |
---|
653 | <td>N/A</td> |
---|
654 | |
---|
655 | <td>Initialization</td> |
---|
656 | </tr> |
---|
657 | |
---|
658 | <tr> |
---|
659 | <td VALIGN=CENTER WIDTH="5%">5</td> |
---|
660 | |
---|
661 | <td VALIGN=CENTER WIDTH="59%">Dilution of Position too High </td> |
---|
662 | |
---|
663 | <td>5 ppm</td> |
---|
664 | |
---|
665 | <td>Self Survey</td> |
---|
666 | </tr> |
---|
667 | |
---|
668 | <tr> |
---|
669 | <td VALIGN=CENTER WIDTH="5%">6</td> |
---|
670 | |
---|
671 | <td VALIGN=CENTER WIDTH="59%">Static 1 Sat. Timing: Sat. not usable</td> |
---|
672 | |
---|
673 | <td>5 ppm</td> |
---|
674 | |
---|
675 | <td>1-D Timing</td> |
---|
676 | </tr> |
---|
677 | |
---|
678 | <tr> |
---|
679 | <td VALIGN=CENTER WIDTH="5%">7</td> |
---|
680 | |
---|
681 | <td VALIGN=CENTER WIDTH="59%">No Satellites Usable</td> |
---|
682 | |
---|
683 | <td>N/A</td> |
---|
684 | |
---|
685 | <td>Self Survey</td> |
---|
686 | </tr> |
---|
687 | |
---|
688 | <tr> |
---|
689 | <td VALIGN=CENTER WIDTH="5%">8</td> |
---|
690 | |
---|
691 | <td VALIGN=CENTER WIDTH="59%">Only 1 Satellite Usable</td> |
---|
692 | |
---|
693 | <td>20 - 50 ms</td> |
---|
694 | |
---|
695 | <td>Self Survey</td> |
---|
696 | </tr> |
---|
697 | |
---|
698 | <tr> |
---|
699 | <td VALIGN=CENTER WIDTH="5%">9</td> |
---|
700 | |
---|
701 | <td VALIGN=CENTER WIDTH="59%">Only 2 Satellite Usable</td> |
---|
702 | |
---|
703 | <td>20 - 50 ms</td> |
---|
704 | |
---|
705 | <td>Self Survey</td> |
---|
706 | </tr> |
---|
707 | |
---|
708 | <tr> |
---|
709 | <td VALIGN=CENTER WIDTH="5%">10</td> |
---|
710 | |
---|
711 | <td VALIGN=CENTER WIDTH="59%">Only 3 Satellites Usable</td> |
---|
712 | |
---|
713 | <td>20 - 50 ms</td> |
---|
714 | |
---|
715 | <td>Self Survey</td> |
---|
716 | </tr> |
---|
717 | |
---|
718 | <tr> |
---|
719 | <td VALIGN=CENTER WIDTH="5%">11</td> |
---|
720 | |
---|
721 | <td VALIGN=CENTER WIDTH="59%">Invalid Solution</td> |
---|
722 | |
---|
723 | <td>N/A</td> |
---|
724 | |
---|
725 | <td>Error</td> |
---|
726 | </tr> |
---|
727 | |
---|
728 | <tr> |
---|
729 | <td VALIGN=CENTER WIDTH="5%">12</td> |
---|
730 | |
---|
731 | <td VALIGN=CENTER WIDTH="59%">Differential Corrections </td> |
---|
732 | |
---|
733 | <td>N/A</td> |
---|
734 | |
---|
735 | <td>N/A</td> |
---|
736 | </tr> |
---|
737 | |
---|
738 | <tr> |
---|
739 | <td VALIGN=CENTER WIDTH="5%">13</td> |
---|
740 | |
---|
741 | <td VALIGN=CENTER WIDTH="59%">Overdetermined Fixes</td> |
---|
742 | |
---|
743 | <td>+/- 100 ns</td> |
---|
744 | |
---|
745 | <td>Timing Steady State</td> |
---|
746 | </tr> |
---|
747 | </table></center> |
---|
748 | |
---|
749 | <h3> |
---|
750 | <b><font size=+0>Packet 8F-0B (Comprehensive Timing Packet)</font></b></h3> |
---|
751 | |
---|
752 | <center><table BORDER=0 CELLSPACING=0 > |
---|
753 | <tr> |
---|
754 | <td VALIGN=CENTER WIDTH="9%">Byte</td> |
---|
755 | |
---|
756 | <td VALIGN=CENTER WIDTH="27%">Item</td> |
---|
757 | |
---|
758 | <td VALIGN=CENTER WIDTH="16%">Type</td> |
---|
759 | |
---|
760 | <td VALIGN=CENTER WIDTH="48%">Meaning</td> |
---|
761 | </tr> |
---|
762 | |
---|
763 | <tr> |
---|
764 | <td VALIGN=CENTER WIDTH="9%">0</td> |
---|
765 | |
---|
766 | <td VALIGN=CENTER WIDTH="27%">Sub-Packet ID</td> |
---|
767 | |
---|
768 | <td VALIGN=CENTER WIDTH="16%">BYTE</td> |
---|
769 | |
---|
770 | <td VALIGN=CENTER WIDTH="48%">Subcode 0x0B</td> |
---|
771 | </tr> |
---|
772 | |
---|
773 | <tr> |
---|
774 | <td VALIGN=TOP WIDTH="9%">1 - 2</td> |
---|
775 | |
---|
776 | <td VALIGN=TOP WIDTH="27%">Event Count</td> |
---|
777 | |
---|
778 | <td VALIGN=TOP WIDTH="16%">INTEGER</td> |
---|
779 | |
---|
780 | <td VALIGN=TOP WIDTH="48%">External event count recorded (0 = PPS)</td> |
---|
781 | </tr> |
---|
782 | |
---|
783 | <tr> |
---|
784 | <td VALIGN=TOP WIDTH="9%">3 - 10</td> |
---|
785 | |
---|
786 | <td VALIGN=TOP WIDTH="27%">UTC / GPS TOW</td> |
---|
787 | |
---|
788 | <td VALIGN=TOP WIDTH="16%">DOUBLE</td> |
---|
789 | |
---|
790 | <td VALIGN=TOP WIDTH="48%">UTC / GPS time of week (seconds)</td> |
---|
791 | </tr> |
---|
792 | |
---|
793 | <tr> |
---|
794 | <td VALIGN=CENTER WIDTH="9%">11</td> |
---|
795 | |
---|
796 | <td VALIGN=CENTER WIDTH="27%">Date</td> |
---|
797 | |
---|
798 | <td VALIGN=CENTER WIDTH="16%">BYTE</td> |
---|
799 | |
---|
800 | <td VALIGN=CENTER WIDTH="48%">Day of Month</td> |
---|
801 | </tr> |
---|
802 | |
---|
803 | <tr> |
---|
804 | <td VALIGN=CENTER WIDTH="9%">12</td> |
---|
805 | |
---|
806 | <td VALIGN=CENTER WIDTH="27%">Month</td> |
---|
807 | |
---|
808 | <td VALIGN=CENTER WIDTH="16%">BYTE</td> |
---|
809 | |
---|
810 | <td VALIGN=CENTER WIDTH="48%">Month of Event</td> |
---|
811 | </tr> |
---|
812 | |
---|
813 | <tr> |
---|
814 | <td VALIGN=CENTER WIDTH="9%">13 - 14</td> |
---|
815 | |
---|
816 | <td VALIGN=CENTER WIDTH="27%">Year</td> |
---|
817 | |
---|
818 | <td VALIGN=CENTER WIDTH="16%">INT</td> |
---|
819 | |
---|
820 | <td VALIGN=CENTER WIDTH="48%">Year of event</td> |
---|
821 | </tr> |
---|
822 | |
---|
823 | <tr> |
---|
824 | <td VALIGN=TOP WIDTH="9%">15</td> |
---|
825 | |
---|
826 | <td VALIGN=TOP WIDTH="27%">Receiver Mode</td> |
---|
827 | |
---|
828 | <td VALIGN=TOP WIDTH="16%">BYTE</td> |
---|
829 | |
---|
830 | <td VALIGN=TOP WIDTH="48%">Receiver operating dimensions: |
---|
831 | <br>0: Horizontal (2D) |
---|
832 | <br>1: Full Position (3D) |
---|
833 | <br>2: Single Satellite (0D) |
---|
834 | <br>3: Automatic (2D / 3D) |
---|
835 | <br>4: DGPS reference |
---|
836 | <br>5: Clock hold (2D) |
---|
837 | <br>6: Over determined Clock</td> |
---|
838 | </tr> |
---|
839 | |
---|
840 | <tr> |
---|
841 | <td VALIGN=CENTER WIDTH="9%">15 - 17</td> |
---|
842 | |
---|
843 | <td VALIGN=CENTER WIDTH="27%">UTC Offset</td> |
---|
844 | |
---|
845 | <td VALIGN=CENTER WIDTH="16%">INTEGER</td> |
---|
846 | |
---|
847 | <td VALIGN=CENTER WIDTH="48%">UTC Offset value (seconds)</td> |
---|
848 | </tr> |
---|
849 | |
---|
850 | <tr> |
---|
851 | <td VALIGN=CENTER WIDTH="9%">18 - 25</td> |
---|
852 | |
---|
853 | <td VALIGN=CENTER WIDTH="27%">Oscillator Bias</td> |
---|
854 | |
---|
855 | <td VALIGN=CENTER WIDTH="16%">DOUBLE</td> |
---|
856 | |
---|
857 | <td VALIGN=CENTER WIDTH="48%">Oscillator BIAS (meters)</td> |
---|
858 | </tr> |
---|
859 | |
---|
860 | <tr> |
---|
861 | <td VALIGN=TOP WIDTH="9%">26 - 33</td> |
---|
862 | |
---|
863 | <td VALIGN=TOP WIDTH="27%">Oscillator Drift Rate</td> |
---|
864 | |
---|
865 | <td VALIGN=TOP WIDTH="16%">DOUBLE</td> |
---|
866 | |
---|
867 | <td VALIGN=TOP WIDTH="48%">Oscillator Drift (meters / second)</td> |
---|
868 | </tr> |
---|
869 | |
---|
870 | <tr> |
---|
871 | <td VALIGN=CENTER WIDTH="9%">34 - 37</td> |
---|
872 | |
---|
873 | <td VALIGN=CENTER WIDTH="27%">Bias Uncertainty</td> |
---|
874 | |
---|
875 | <td VALIGN=CENTER WIDTH="16%">SINGLE</td> |
---|
876 | |
---|
877 | <td VALIGN=CENTER WIDTH="48%">Oscillator bias uncertainty (meters)</td> |
---|
878 | </tr> |
---|
879 | |
---|
880 | <tr> |
---|
881 | <td VALIGN=CENTER WIDTH="9%">38 - 41</td> |
---|
882 | |
---|
883 | <td VALIGN=CENTER WIDTH="27%">Drift Uncertainty</td> |
---|
884 | |
---|
885 | <td VALIGN=CENTER WIDTH="16%">SINGLE</td> |
---|
886 | |
---|
887 | <td VALIGN=CENTER WIDTH="48%">Oscillator bias rate uncertainty (m / sec)</td> |
---|
888 | </tr> |
---|
889 | |
---|
890 | <tr> |
---|
891 | <td VALIGN=CENTER WIDTH="9%">42 - 49</td> |
---|
892 | |
---|
893 | <td VALIGN=CENTER WIDTH="27%">Latitude</td> |
---|
894 | |
---|
895 | <td VALIGN=CENTER WIDTH="16%">DOUBLE</td> |
---|
896 | |
---|
897 | <td VALIGN=CENTER WIDTH="48%">Latitude in radians</td> |
---|
898 | </tr> |
---|
899 | |
---|
900 | <tr> |
---|
901 | <td VALIGN=CENTER WIDTH="9%">50 - 57</td> |
---|
902 | |
---|
903 | <td VALIGN=CENTER WIDTH="27%">Longitude</td> |
---|
904 | |
---|
905 | <td VALIGN=CENTER WIDTH="16%">DOUBLE</td> |
---|
906 | |
---|
907 | <td VALIGN=CENTER WIDTH="48%">Longitude in radians</td> |
---|
908 | </tr> |
---|
909 | |
---|
910 | <tr> |
---|
911 | <td VALIGN=CENTER WIDTH="9%">58 - 65</td> |
---|
912 | |
---|
913 | <td VALIGN=CENTER WIDTH="27%">Altitude</td> |
---|
914 | |
---|
915 | <td VALIGN=CENTER WIDTH="16%">DOUBLE</td> |
---|
916 | |
---|
917 | <td VALIGN=CENTER WIDTH="48%">Altitude above mean sea level, in meters</td> |
---|
918 | </tr> |
---|
919 | |
---|
920 | <tr> |
---|
921 | <td VALIGN=CENTER WIDTH="9%">66 - 73</td> |
---|
922 | |
---|
923 | <td VALIGN=CENTER WIDTH="27%">Satellite ID</td> |
---|
924 | |
---|
925 | <td VALIGN=CENTER WIDTH="16%">BYTE</td> |
---|
926 | |
---|
927 | <td VALIGN=CENTER WIDTH="48%">SV Id No. of tracked satellites</td> |
---|
928 | </tr> |
---|
929 | </table></center> |
---|
930 | |
---|
931 | <h2> |
---|
932 | <a NAME="Pinouts"></a><font size=+1>Pinouts</font></h2> |
---|
933 | <a href="#Connection">The following connections are required when connecting |
---|
934 | Palisade with a host:</a> |
---|
935 | <br> |
---|
936 | <br> |
---|
937 | <center><table> |
---|
938 | <tr> |
---|
939 | <td><u>Description</u></td> |
---|
940 | |
---|
941 | <td><b>Host</b></td> |
---|
942 | |
---|
943 | <td></td> |
---|
944 | |
---|
945 | <td></td> |
---|
946 | |
---|
947 | <td><b>Palisade </b></td> |
---|
948 | |
---|
949 | <td></td> |
---|
950 | |
---|
951 | <td></td> |
---|
952 | </tr> |
---|
953 | |
---|
954 | <tr> |
---|
955 | <td><a NAME="PortA"></a><b>Port A</b></td> |
---|
956 | |
---|
957 | <td><u>DB-9</u></td> |
---|
958 | |
---|
959 | <td><u>DB-25</u></td> |
---|
960 | |
---|
961 | <td></td> |
---|
962 | |
---|
963 | <td><u>RS-232</u></td> |
---|
964 | |
---|
965 | <td><u>RS-422</u></td> |
---|
966 | |
---|
967 | <td><u>Palisade Pin</u></td> |
---|
968 | </tr> |
---|
969 | |
---|
970 | <tr> |
---|
971 | <td>Receive Data </td> |
---|
972 | |
---|
973 | <td>2</td> |
---|
974 | |
---|
975 | <td>3</td> |
---|
976 | |
---|
977 | <td><--></td> |
---|
978 | |
---|
979 | <td>Green</td> |
---|
980 | |
---|
981 | <td>Green / Blue</td> |
---|
982 | |
---|
983 | <td>8 (T-) & 10 (T+)</td> |
---|
984 | </tr> |
---|
985 | |
---|
986 | <tr> |
---|
987 | <td>Request to Send</td> |
---|
988 | |
---|
989 | <td>7</td> |
---|
990 | |
---|
991 | <td>4</td> |
---|
992 | |
---|
993 | <td><--></td> |
---|
994 | |
---|
995 | <td>Gray</td> |
---|
996 | |
---|
997 | <td>Gray / White</td> |
---|
998 | |
---|
999 | <td>6 (R-) & 7 (R+)</td> |
---|
1000 | </tr> |
---|
1001 | |
---|
1002 | <tr> |
---|
1003 | <td>Signal Ground</td> |
---|
1004 | |
---|
1005 | <td>5</td> |
---|
1006 | |
---|
1007 | <td>7</td> |
---|
1008 | |
---|
1009 | <td><--></td> |
---|
1010 | |
---|
1011 | <td>Black</td> |
---|
1012 | |
---|
1013 | <td>Black</td> |
---|
1014 | |
---|
1015 | <td>9 (GND)</td> |
---|
1016 | </tr> |
---|
1017 | |
---|
1018 | <tr> |
---|
1019 | <td></td> |
---|
1020 | |
---|
1021 | <td></td> |
---|
1022 | |
---|
1023 | <td></td> |
---|
1024 | |
---|
1025 | <td></td> |
---|
1026 | |
---|
1027 | <td></td> |
---|
1028 | |
---|
1029 | <td></td> |
---|
1030 | |
---|
1031 | <td></td> |
---|
1032 | </tr> |
---|
1033 | |
---|
1034 | <tr> |
---|
1035 | <td><a NAME="PortB"></a><b>Port B</b></td> |
---|
1036 | |
---|
1037 | <td></td> |
---|
1038 | |
---|
1039 | <td></td> |
---|
1040 | |
---|
1041 | <td></td> |
---|
1042 | |
---|
1043 | <td></td> |
---|
1044 | |
---|
1045 | <td></td> |
---|
1046 | |
---|
1047 | <td></td> |
---|
1048 | </tr> |
---|
1049 | |
---|
1050 | <tr> |
---|
1051 | <td>Receive Data </td> |
---|
1052 | |
---|
1053 | <td>2</td> |
---|
1054 | |
---|
1055 | <td>3</td> |
---|
1056 | |
---|
1057 | <td><--></td> |
---|
1058 | |
---|
1059 | <td>Brown</td> |
---|
1060 | |
---|
1061 | <td>Brown / Yellow</td> |
---|
1062 | |
---|
1063 | <td>4 (T-) & 5 (T+)</td> |
---|
1064 | </tr> |
---|
1065 | |
---|
1066 | <tr> |
---|
1067 | <td>Transmit Data</td> |
---|
1068 | |
---|
1069 | <td>3</td> |
---|
1070 | |
---|
1071 | <td>2</td> |
---|
1072 | |
---|
1073 | <td><--></td> |
---|
1074 | |
---|
1075 | <td>Violet</td> |
---|
1076 | |
---|
1077 | <td>Orange/ Violet</td> |
---|
1078 | |
---|
1079 | <td>2 (R-) & 3 (R+)</td> |
---|
1080 | </tr> |
---|
1081 | |
---|
1082 | <tr> |
---|
1083 | <td>Signal Ground</td> |
---|
1084 | |
---|
1085 | <td>5</td> |
---|
1086 | |
---|
1087 | <td>7</td> |
---|
1088 | |
---|
1089 | <td><--></td> |
---|
1090 | |
---|
1091 | <td>Black</td> |
---|
1092 | |
---|
1093 | <td>Black</td> |
---|
1094 | |
---|
1095 | <td>9 (GND)</td> |
---|
1096 | </tr> |
---|
1097 | </table></center> |
---|
1098 | |
---|
1099 | <blockquote>Note: If driving the RS-422 inputs on the Palisade single ended, |
---|
1100 | i.e. using the Green and Gray connections only, does not work on all serial |
---|
1101 | ports. Use of the Palisade NTP Synchronization Interface Module is recommended.</blockquote> |
---|
1102 | |
---|
1103 | <blockquote>The 12 pin connector pinout definition: |
---|
1104 | <br>Face the round 12 pin connector at the end of the cable, with the notch |
---|
1105 | turned upwards. |
---|
1106 | <br>Pin 1 is to the left of the notch. Pins 2 - 8 wrap around the bottom, |
---|
1107 | counterclockwise to pin 9 on the right of the notch. Pin 10 is just below |
---|
1108 | the notch. Pins 10 (top), 11 (bottom left) and 12 (bottom right) form a |
---|
1109 | triangle in the center of the connector.</blockquote> |
---|
1110 | |
---|
1111 | <blockquote><a NAME="SIM"></a>Pinouts for the Palisade NTP host adapter |
---|
1112 | (Trimble PN 37070) DB-25 M connector are as follows:</blockquote> |
---|
1113 | |
---|
1114 | <center><table BORDER=0 CELLSPACING=0 WIDTH="682" > |
---|
1115 | <tr> |
---|
1116 | <td VALIGN=CENTER WIDTH="12%">DB-25M</td> |
---|
1117 | |
---|
1118 | <td VALIGN=CENTER WIDTH="31%">Conductor </td> |
---|
1119 | |
---|
1120 | <td VALIGN=CENTER WIDTH="16%">Palisade</td> |
---|
1121 | |
---|
1122 | <td VALIGN=CENTER WIDTH="41%">Description</td> |
---|
1123 | </tr> |
---|
1124 | |
---|
1125 | <tr> |
---|
1126 | <td VALIGN=CENTER WIDTH="12%">1 </td> |
---|
1127 | |
---|
1128 | <td VALIGN=CENTER WIDTH="31%">Red</td> |
---|
1129 | |
---|
1130 | <td VALIGN=CENTER WIDTH="16%">1</td> |
---|
1131 | |
---|
1132 | <td VALIGN=CENTER WIDTH="41%">Power</td> |
---|
1133 | </tr> |
---|
1134 | |
---|
1135 | <tr> |
---|
1136 | <td VALIGN=CENTER WIDTH="12%">7 </td> |
---|
1137 | |
---|
1138 | <td VALIGN=CENTER WIDTH="31%">Black</td> |
---|
1139 | |
---|
1140 | <td VALIGN=CENTER WIDTH="16%">9</td> |
---|
1141 | |
---|
1142 | <td VALIGN=CENTER WIDTH="41%">Ground</td> |
---|
1143 | </tr> |
---|
1144 | |
---|
1145 | <tr> |
---|
1146 | <td VALIGN=CENTER WIDTH="12%">9</td> |
---|
1147 | |
---|
1148 | <td VALIGN=CENTER WIDTH="31%">Black/White</td> |
---|
1149 | |
---|
1150 | <td VALIGN=CENTER WIDTH="16%">12</td> |
---|
1151 | |
---|
1152 | <td VALIGN=CENTER WIDTH="41%">PPS -</td> |
---|
1153 | </tr> |
---|
1154 | |
---|
1155 | <tr> |
---|
1156 | <td VALIGN=CENTER WIDTH="12%">10 </td> |
---|
1157 | |
---|
1158 | <td VALIGN=CENTER WIDTH="31%">Green</td> |
---|
1159 | |
---|
1160 | <td VALIGN=CENTER WIDTH="16%">8</td> |
---|
1161 | |
---|
1162 | <td VALIGN=CENTER WIDTH="41%">Transmit Port A (T-)</td> |
---|
1163 | </tr> |
---|
1164 | |
---|
1165 | <tr> |
---|
1166 | <td VALIGN=CENTER WIDTH="12%">11 </td> |
---|
1167 | |
---|
1168 | <td VALIGN=CENTER WIDTH="31%">Brown</td> |
---|
1169 | |
---|
1170 | <td VALIGN=CENTER WIDTH="16%">4</td> |
---|
1171 | |
---|
1172 | <td VALIGN=CENTER WIDTH="41%">Transmit Port B (T-)</td> |
---|
1173 | </tr> |
---|
1174 | |
---|
1175 | <tr> |
---|
1176 | <td VALIGN=CENTER WIDTH="12%">12 </td> |
---|
1177 | |
---|
1178 | <td VALIGN=CENTER WIDTH="31%">Gray</td> |
---|
1179 | |
---|
1180 | <td VALIGN=CENTER WIDTH="16%">7</td> |
---|
1181 | |
---|
1182 | <td VALIGN=CENTER WIDTH="41%">Receive Port A (R+)</td> |
---|
1183 | </tr> |
---|
1184 | |
---|
1185 | <tr> |
---|
1186 | <td VALIGN=CENTER WIDTH="12%">13</td> |
---|
1187 | |
---|
1188 | <td VALIGN=CENTER WIDTH="31%">Orange</td> |
---|
1189 | |
---|
1190 | <td VALIGN=CENTER WIDTH="16%">3</td> |
---|
1191 | |
---|
1192 | <td VALIGN=CENTER WIDTH="41%">Receive Port B (R+)</td> |
---|
1193 | </tr> |
---|
1194 | |
---|
1195 | <tr> |
---|
1196 | <td VALIGN=CENTER WIDTH="12%">21</td> |
---|
1197 | |
---|
1198 | <td VALIGN=CENTER WIDTH="31%">Orange/White</td> |
---|
1199 | |
---|
1200 | <td VALIGN=CENTER WIDTH="16%">11</td> |
---|
1201 | |
---|
1202 | <td VALIGN=CENTER WIDTH="41%">PPS +</td> |
---|
1203 | </tr> |
---|
1204 | |
---|
1205 | <tr> |
---|
1206 | <td VALIGN=CENTER WIDTH="12%">22</td> |
---|
1207 | |
---|
1208 | <td VALIGN=CENTER WIDTH="31%">Blue</td> |
---|
1209 | |
---|
1210 | <td VALIGN=CENTER WIDTH="16%">10</td> |
---|
1211 | |
---|
1212 | <td VALIGN=CENTER WIDTH="41%">Transmit Port A (T+)</td> |
---|
1213 | </tr> |
---|
1214 | |
---|
1215 | <tr> |
---|
1216 | <td VALIGN=CENTER WIDTH="12%">23</td> |
---|
1217 | |
---|
1218 | <td VALIGN=CENTER WIDTH="31%">Yellow</td> |
---|
1219 | |
---|
1220 | <td VALIGN=CENTER WIDTH="16%">5</td> |
---|
1221 | |
---|
1222 | <td VALIGN=CENTER WIDTH="41%">Transmit Port B (T+)</td> |
---|
1223 | </tr> |
---|
1224 | |
---|
1225 | <tr> |
---|
1226 | <td VALIGN=CENTER WIDTH="12%">24</td> |
---|
1227 | |
---|
1228 | <td VALIGN=CENTER WIDTH="31%">White</td> |
---|
1229 | |
---|
1230 | <td VALIGN=CENTER WIDTH="16%">6</td> |
---|
1231 | |
---|
1232 | <td VALIGN=CENTER WIDTH="41%">Receive Port A (R-)</td> |
---|
1233 | </tr> |
---|
1234 | |
---|
1235 | <tr> |
---|
1236 | <td VALIGN=CENTER WIDTH="12%">25</td> |
---|
1237 | |
---|
1238 | <td VALIGN=CENTER WIDTH="31%">Violet</td> |
---|
1239 | |
---|
1240 | <td VALIGN=CENTER WIDTH="16%">2</td> |
---|
1241 | |
---|
1242 | <td VALIGN=CENTER WIDTH="41%">Receive Port B (R-)</td> |
---|
1243 | </tr> |
---|
1244 | </table></center> |
---|
1245 | |
---|
1246 | <p> |
---|
1247 | <hr> |
---|
1248 | <p>Questions or Comments: |
---|
1249 | <br><a href="mailto:sven_dietrich@trimble.com">Sven Dietrich</a> |
---|
1250 | <br><a href="http://www.trimble.com/">Trimble Navigation Ltd.</a> |
---|
1251 | <p>(last updated July 29, 1999) |
---|
1252 | <br> |
---|
1253 | </body> |
---|
1254 | </html> |
---|