[AusNOG] Reference clock for SDH network

[Yin To Chu]

Probably I won't use the services from the SDH network even if it is free,
if so clocked by a $5k GPS.

On Tue, Oct 27, 2009 at 3:07 PM, Daniel O'Connor <doconnor at gsoft.com.au>wrote:

> On Tue, 27 Oct 2009, Damien Gardner Jnr wrote:
> > On 27/10/2009, at 12:19 PM, Tom Storey wrote:
> > > Hi All,
> > >
> > > Can anyone suggest a clock that is able to produce a 2mbit/2mhz
> > > sync signal to use as a reference for an SDH network?
> > > The network is detatched from any existing SDH networks, so I have
> > > to clock it from scratch.
> > > So far I have only come across one that is around the $3k mark
> > > (Oscilloquartz), and my googlefu is failing me at the moment.
> >
> > I'm obviously missing something here, but how on earth can a crystal,
> > a couple of caps and resistors, and maybe a transistor or two or an
> > IC work out to the $3k mark??
> >
> > I'm assuming you're actually looking for something more complex than
> > a simple 2mhz clock signal??
>
> Depends what level of jitter and stability you need.
>
> A rubidium conditioned signal source could easily cost that much.
>
> If the jitter and stability aren't a big issue then a $5 XTAL from
> Jaycar will do though ;)
>
> --
> Daniel O'Connor software and network engineer
> for Genesis Software - http://www.gsoft.com.au
> "The nice thing about standards is that there
> are so many of them to choose from."
>  -- Andrew Tanenbaum
> GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
>
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