I apologise for the cross-posting and for possibly not choosing the best
groups for this message.
I'm having some very annoying problems that I believe are due to radio
interference. All my devices were working well until last night when I
started experiencing the following problems.
Symptoms are:
1) Wireless doorbells only work when the transmitter is within about 30cm,
regardless of frequency chosen. (I have 4 identical doorbells as my
partner
is hearing impaired.). All 4 transmitters and receivers exhibit the same
problem. (The doorbells are those Kambrook plug into the wall types).
2) Audio/video retransmitter remote does not work. (The picture and audio
are unaffected and operate on 2.4GHz). In fact I have to cover up the
remote
on the sender, otherwise I cannot use my remote control on my tv/foxtel as
it seems to swamp the signal somehow and you can't change channels
standing
at the main unit (ie directly not through the retransmitter, but at the
original target device).
3) My mother's car alarm will not trigger. This one is more serious as she
can't park here until the problem is sorted, or she gets her alarm
deactivated as there is no manual switch.
4) There do seem to be very occassional breaks where the interference
disappears. During these breaks everything works as it use to. Note that
the
retransmitters and doorbells had been working just fine for months.
Note that a pair of DECT phones operating at 1.8GHz are unaffected as is a
phone operating at 9GHz. MY 2.4GHz wireless network also works (though I
haven't done detailed testing to see if its dropping packets etc.). The
DECT
phones are the newest gadgets but I've switched them and their base
stations
off and they don't seem to be the problem. (I'd been running them for days
without a hiccup in any case).
I've tried scanning up and down on an AM/FM radio but found nothing. I'd
say
the interference is localized to a certain range of frequencies.
I've put a lot of time and money into setting up all these gadgets. I'd
really like to be able to track down this problem as cheaply as I can. I
am
no dummy but I'm by no means a radio expert either. Though I'm hoping the
source is internal to the house I very seriously doubt it. How can I go
about fixing this (or at least determining what the problem might be)? To
scrap the affected systems means throwing away or selling about AUD500
worth
of gear, and going without those conveniences. (I live in Quakers Hill, a
suburb of Sydney in Australia if that is of any consequence.)
Thanks for your time in reading/replying.
--
Sammy Yousef
Email: syousef@[EMAIL PROTECTED]
http://www.progsoc.uts.edu.au/~sammy
