[time-nuts] National Standards labs worldwide - specifically Australia
grady.steve at gmail.com
Mon Jun 30 09:26:32 EDT 2014
If you are looking for the Australian NMI (the equivalent of NPL and NIST)
then you are correct it is called the National Measurement Institute
www.measurement.gov.au for a list of all the NMI's that are signatories (or
associates) of the metre treaty then www.bipm.org (or more explicitly)
http://www.bipm.org/en/practical_info/useful_links/nmi.html is the place to
Regarding VNA calibration, sadly the RF Microwave Project of NMI Australia
is not as active as is was years ago due to the RF Microwave industry moving
away from Australia and the need for traceable measurements in that area
decreased. I believe that the work you are referring to would have been done
by the late Dr Peter Solmo. I cannot provide direct reference although if
you want I could provide a contact in NMI Australia or one of its recent
retirees that may know.
On Jun 29, 2014, at 6:33 AM, Dr. David Kirkby <drkirkby at gmail.com> wrote:
> I know of NPL in the UK, and NIST in the USA, but is anyone aware of
> other "standard labs". In particular I am looking for the Australian
> equivalent. A Google search came across "Standards Australia"
> but I don't know how "authoritative" this is. There is basically
> nothing stopping any body here setting up a web site claiming to be
> the countries leading non-government standards labs. I have a very
> healthy skepticism of calibration laboratories in general
> NIST for example does have a ".gov" domain, which gives it a bit more
> credibility than a typical .com.
> NPL does not have a .gov, despite we use it in the UK.
> I found the The National Measurement Institute (NMI)
> which is probably the one I am looking for.
> There are people on this list who I would trust to produce a list of
> national standards labs more than I would from a Google search or
> There are a couple of things I am looking to find out - neither of
> which are very time-nut related, but both are to some extent as they
> they involve measuring the phase difference between two signals.
> 1) There was some work done somewhere (I believe an Australian lab),
> which showed that calibrating a VNA with 1/8 and 3/8 offset shorts is
> superior to a flush short and 1/4 spacer. Both give the desired 180
> degree difference in reflected signal, so at first thought they are
> equivalent. I do know the reason the 1/8 and 3/8 are superior, but I'd
> like to find a reference.
> 2) Who in Australia would be best at measuring the reflection
> coefficient of a 50 Ohm termination?
> Dr. David Kirkby G8WRB
> Economical & accurate VNA calibration kits.
> Coefficients available for HP, Agilent, Anritsu, Rohde & Schwarz and
> VNWA network analyzers.
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