[ntp:questions] Re: Naval Observatory Master Clock

Darryl Otzen "darryl otzen at acterna com" at ntp.isc.org
Mon Jul 11 12:11:28 UTC 2005


I was joking.
I work with SDH sync as part of my job, mostly Symmetricom products.

Darryl.

Bjorn Gabrielsson wrote:
> Looking professional... there are other GPS receivers than a Garmin
> eTrex, that are much more suited for timing/sync etc.
> 
> Here are some links --
> 
>         http://www.meinberg.de/english/products/application.htm
> 
>         http://www.trimble.com/timing.shtml
> 
>         http://www.novatel.com/products/smart.htm
> 
>         http://www.navman.com/oem/products/gps_receivers/jupiter_t/index.html
> 
> Or some Motorolas from Synergy before Motorola receivers go away...
> 
>         http://www.synergy-gps.com/GSynQ_EnTN-813.pdf
> 
> Not to mention
> 
>         http://www.symmttm.com/products_gps_time_code_instrumentation.asp
> 
> or
>         http://www.zyfer.com/timefreqprod.html
> 
> --
> 
>         Björn
> 
> 
> dicky <abuse at hotmail.com> writes:
> 
> 
>>This is true, but I have difficulty in convincing my clients to use a Garmin eTrex as their sync source.
>>In a professional environment you have to sometimes look good as well as perform good.
>>
>>Darryl.
>>
>>David Schwartz wrote:
>>
>>>"dicky" <abuse at hotmail.com> wrote in message
>>>news:42d1efff$0$5919$5a62ac22 at per-qv1-newsreader-01.iinet.net.au...
>>>
>>>
>>>>If it is time interval that you need to calibrate, and not time of
>>>>day, then I recommend that you get a GPS synchronisation reference
>>>>receiver.
>>>>The accuracy of these sync sources are traceable to NIST, and are
>>>>only one step down from a caesium reference oscillator.
>>>>A caesium oscillator would cost you about $45k USD, a telco spec
>>>>10MHz GPS derived oscillator can be bought for around $3k USD.
>>>
>>>    GPS devices with time of day traceable to NIST that can give you
>>>one microsecond accuracy are available for about $150 or less. With
>>>a dedicated Pentium PC, you can get a timestamper that's accurate to
>>>5 microseconds or so with very little difficulty.
>>>    DS
>>>




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