[BC] Spread spectrum blivot...

[Burt I. Weiner]

I cannot tell you how many times I've been told that by it's very 
nature spread spectrum or frequency hopping is immune from 
interference and (also) by it's very nature will not cause 
interference.  Recently I've started receiving calls from production 
houses that they are experiencing dropouts in their digital wireless 
cameras and microphones operating in the 5.8 GHz region.  Quite often 
I find that it's the result of cordless phones and other devices 
operating nearby in these bands.  Wireless laptops used on production 
sites are quite in fashion.  Signals are signals no matter their 
duration.  With higher throughput the interference looks even longer 
in duration.  The spectrum is loading up nicely and the noise floor is rising.

Burt

At 08:38 AM 1/18/2006, you wrote:
>Isn't it amazing that with the number of companies and many of them selling
>the same frequencies with the sharing and the implementation of digital
>compression and the ever increasing numbers of folks now on the cell 
>phone all  the
>time, that us people that have been using cell fones from the old days are
>tired of losing connections between words instead of the old ANALOG Warning
>NOISE.  It was easier to tell the cumtomer,  I think I am going 
>to  lose you,  I
>will call you back.  Now you are lucky if you get chopped  words before it
>dies.
>
>Question?  as more cell fones hit the market place how much changing  of the
>sample rates can be done and still maintain a reliable system??
>
>In major cities it is becoming more an more difficult to complete a
>conversation while traveling.'
>
>Dave

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California  U.S.A.
biwa at earthlink.net
K6OQK