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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi All</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I need 640 MHz and 100 MHz for my 10 GHz rig. I have been looking at various
ways to do this including using two of the REFLOCK II boards and various demo
boards. These are not the hardest of frequencies to generate but as the 640 MHz
has to be multiplied by 16 so its phase noise has to be quite good. I am
tending towards building a synthesizer using two standard T paged VCOs and an
LMX 2485 loaded by a CPLD. </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>It seams that this could be a useful board for many other applications including
the LO generation for SDRs. In the case of low IF radios the lower frequency synthesizer
could be made to tune an octave at some VHF frequency and divided by the CPLD
to give the necessary coverage. The higher frequency synthesizer could be used
for down converting higher bands to the SDR frequencies.</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Specifically for my initial application I am looking at using a Sirenza
CRO 190-1280T vco, with a 1240 to 1320 MHz tuning range, divided by 2 for the
640 MHz. </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I would like to know if there are others who would be interested in a
board similar to this. I am a newcomer to the HPSDR group and so far have only
looked on from the outside, other than having our 6 year old build Atlas and Pinocchio
boards. </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>73 Brian KF6C G3ZVC</span></font></p>
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