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<h1><b><font size=3 face="Times New Roman"><span style='font-size:12.0pt;
font-weight:normal'>ALMA Memo # 483<o:p></o:p></span></font></b></h1>
<h2><b><font size=3 face="Times New Roman"><span style='font-size:12.0pt;
font-weight:normal'>The ALMA 1st Local Oscillator Reference <br>
<br>
Bill Shillue, Sarmad AlBanna, and Larry D'Addario<br>
National Radio Astronomy Observatory <br>
<br>
2004-09-29<o:p></o:p></span></font></b></h2>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>The ALMA
1st LO Reference system consists of a laser synthesizer, active line length
correction, photonic distribution, and a photonic receiver. The phase stability
and phase drift specifications are very ambitious, and the effort to meet them
has led to small evolutions and improvements in the design. This memo gives a
general description of the system, and documents its current measured
performance levels, as measured in the laboratory. <o:p></o:p></span></font></p>
<p style='margin:0in;margin-bottom:.0001pt'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>View a pdf version of ALMA Memo #4<font color=navy><span
style='color:navy'>83</span></font>. <o:p></o:p></span></font></p>
<p class=MsoNormal><u><font size=2 color=blue face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:blue'><a
href="http://www.alma.nrao.edu/memos/html-memos/alma483/memo483.pdf">http://www.alma.nrao.edu/memos/html-memos/alma483/memo483.pdf</a></span></font></u><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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