🚀 go-pugleaf

On Tue, 21 Aug 2012 23:47:21 -0500, "NotMe" <me@privacy.net> wrote:

>
>"sms88" <scharf.steven@geemail.com> wrote in message
>news:k1160j$37p$1@dont-email.me...
>>
>>
>> On 8/21/2012 4:12 PM, NotMe wrote:
>>> "sms88" <scharf.steven@geemail.com> wrote in message
>>> news:k1101t$u7p$1@dont-email.me...
>>>> <http://news.cnet.com/8301-1035_3-57497517-94/at-t-cuts-frequency-on-cell-towers-that-jammed-police-radios/>
>>>
>>> It's a well known and documented problem not only for 800 Mhz system.
>>> Often
>>> the problem is not caused by the cell tower but can and has been traced
>>> to
>>> the design of the public service radios themselves.
>>
>> Hmm, the FCC investigated this and found the source of interference.
>> Whether AT&T was doing something wrong, or the public service radio has
>> priority when there is interference, is not clear.
>
>CTIA did an extensive study on the problem in the '90s,  I'll see if I can
>find my copy of the report.
>
>In any case it's rare where Public Safety has had to bear the burden of the 
>fix.

Some years ago several neighbors complained to the FCC that a ham was
causing interference to their TV sets. An investigation found that the
ham's gear was clean but that the TV sets had insufficient adjacent
channel interference capability to suppress the ham's strong signal.
Though the ham was not at fault he was given quiet hours (ordered not
to transmit) during peak TV viewing time.

Perhaps this is a similar situation. I doubt the cell tower is
transmitting on the wrong frequency (public service). More likely the
public service gear can't handle the strong adjacent frequency signal.
It's probably easier to shut off a cell tower than to replace all the
current public service radios. From a public safety standpoint that
makes sense. However time will likely solve the problem as the PS
units are eventually upgraded or changed out.