[time-nuts] Why these Crystal Frequencies?
alan.melia at btinternet.com
Thu Dec 15 14:37:51 EST 2011
....and the one right at the bottom 1.4204058 GHz is the atomic hydrogen
"rest frequency" to those of us with a vague interest in Radio astronomy
----- Original Message -----
From: "Brooke Clarke" <brooke at pacific.net>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Thursday, December 15, 2011 3:13 AM
Subject: [time-nuts] Why these Crystal Frequencies?
> Hi Pete:
> Maybe you can shed some light on the common xtal frequencies table where
there's no explanation given?
> An answer is not it's an "even" frequency or "it's an even binary
frequency. That's true for most of these and the
> factors are part of the table above.
> The question is why do they exist?
> such as:
> 32.0 kHz
> 3.072 MHz
> 1.4204058 GHz
> Have Fun,
> Brooke Clarke
> Peter Bell wrote:
> > It's exactly 52 times the 1.2288MHz reference that IS95/CDMA2K uses -
> > this may be a coincidence, but I somehow doubt it.
> > Regards,
> > Pete
> > On Thu, Dec 15, 2011 at 3:46 AM, Joe Leikhim<JLeikhim at leikhim.com>
> >> I have been watching this thread and may have missed something. My
> >> questions: What is the purpose of the outboard OCXO VECTRON 63.8976Mhz?
> >> model number does this RB most closely resemble?
> >> --
> >> Joe Leikhim
> >> Leikhim and Associates
> >> Communications Consultants
> >> Oviedo, Florida
> >> www.Leikhim.com
> >> JLeikhim at Leikhim.com
> >> 407-982-0446
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