Thanks Ian, Yes I believe that this is likely
to be the same problem and the issue is not just causing problems for Vodafone
but also smaller operators. The fact that MED have confirmed that they are operating
within the allowable channels is of some concern as this would mean there is
little that can be done however using equipment legal or not that can squash competition
is surely an anticompetitive act.
That aside I have completed another can of
the area and was wrong on the power levels received from a 3rd cell
phone operator, it was just over 2V/m and I’m pretty sure a signal this
strong is really not healthy. This was obtained from 150/200m away.
Not trying to get up in anyone’s
face here but I wonder if in fact Telecom are being blamed for something that
is being caused by other vendors networks as well. Have MED created some of the
issues by slicing the available channels too fine as was the case with out
tests of the WiMAX gear recently. And If MED has and is allowing the deployment
of equipment that is making the public spectrum un-usable and they can not
force the vendors to clean up their act then maybe they need to look at opening
up some more USABLE public spectrum rather than just putting it up for auction
where again only the big players have the funds available to purchase these
ranges (and associated equipment).
Regards
Andrew
-----Original
Message-----
From: Ian Batterbee
[mailto:ibatterb@gmail.com]
Sent: Friday, May 01, 2009 10:01
PM
To: andrew@borg.co.nz
Subject: Re: [nznog] 922Mhz SRD
Link
http://www.nzherald.co.nz/technology/news/article.cfm?c_id=5&objectid=10569875
relevant maybe ?
andrew@borg.co.nz wrote, On Fri
01/05/2009 19:06:
Is there any one in the Manukau region using a 900Mhz SRD
link? Over the last month or so we have seen a huge amount of interference on
the 900Mhz spectrum that has resulted in problematic links. Although we have
not been able to isolate the reason for the interference I would be interested
in working with any other user in the area who may be having issues.
So far we have
found that the recent deployment of telecoms new system based on wideband CDMA
has increased the power flux density and as a result it appears that this may
be part of the problem.
Opposite our site
is another carrier operating on 940Mhz and from a distance of 150+m we are
picking up their signal at -7db and at a power level of around .8mv/m2 so there
could be some inter modulation going on there.
I would be keen on
comparing notes with anyone else on this.
Regards
Andrew
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