[time-nuts] How can I generate a very clean 1 W signal @ 116 MHz ?

[Claudio Girardi]

FYI, some phase noise measurements on local oscillators at 106 and 117 
MHz (used for microwave transverters) can be found at http://f5lgj.chez-
alice.fr/mesure_oscillateur.html .
The PLLVCXO mentioned there, that allows locking to a 10 MHz 
reference, should be this one http://f4dru.chez-alice.fr/plvcxo/CJ2010.
pdf .

73 de Claudio, IN3OTD / DK1CG


>----Messaggio originale----
>Da: "Dr. David Kirkby (Kirkby Microwave Ltd)" 
<drkirkby at kirkbymicrowave.co.uk>
>Data: 30-mag-2016 11.06 AM
>A: "Discussion of precise time and frequency measurement"<time-
nuts at febo.com>
>Ogg: [time-nuts] How can I generate a very clean 1 W signal @ 116 MHz 
?
>
>I was thinking about designing a 2 m (144-146 MHz) ->HF (28-30 MHz)
>transverter, using a 116 MHz local oscillator feeding a level 30 
mixer.
>
>116 + 28 = 144
>116 + 30 = 146
>
>I'm wondering what's the best way to generate 116 MHz with very low 
phase
>noise. Phase noise at < 20 kHz offset is particularly important, but 
200
>kHz would be fairly important. Outside that, it does not matter too 
much.
>
>The ability to lock to 10 MHz would be "nice", but certainly not 
essential,
>as absolute frequency stability would not be of prime importance. 
Getting
>the phase noise as low as possible would be more important. I expect 
better
>performance can be achieved if one forgets about locking the signal 
source
>to something else, but I may be wrong.
>
>An HP 8663A sig gen has <-147 dBc/Hz at 10 kHz offset, but I'd hope 
its
>possible to produce something better than is possible in a commercial 
sig
>gen that covers up to 2.5 GHz.
>
>Dave
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