[ntp:questions] Questions about joining pool.ntp.org

unruh unruh at wormhole.physics.ubc.ca
Sun Aug 28 20:41:27 UTC 2011

On 2011-08-28, John Hasler <jhasler at newsguy.com> wrote:
> David writes:
>> Putting anything powerful and widespread next to a weak-signal
>> satellite band in use by consumer appliances is just plain crazy
>> planning, in fact it's a complete lack of planning!
> Shipping products lacking adequate filtering for adjacent band
> interference just because those bands are not presently in use is just
> plain bad engineering.

No transmitter has infinitely steep stop bands in frequency space. There
is ALWAYS bleedover, proportional to the main signal strength. Plus some
of those transmitters   WILL be badly engineered, or will drift due to
aging. It IS just plain stupid to put a strong signal next to a band you
know contains weak signals. 

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