At 11:59 PM 8/10/04 -0700, you wrote:
Installation of DSL has caused
terrible overnight
buzzing from the 500's to about 1000kHz.
Phone company made adjustments at street and
house.
Buzzing on portable radios re-radiated in
vicinity?????????????
Hi:
I'm sorry I am no help re your problem... but I will be reading the mail
as I am curious about your EMI situation and the DSL installation.?
Does your phone line come to your house via buried cable or is an
overhead line from the pole?? I have a DSL installation at this
location .... in fact the outlet for the DSL modem and the modem itself
are located about 1 1/2 ft from my operating position ..... I experience
no noise from it what so ever .... however, I will check a little more
closely on the frequencies you mention.? By the way the phone line
here comes in via a buried cable (6 pairs) the local telephone company
installed about 3 or 4 years ago.
Now I did have some noise problem from the telephone installation about 2
years ago.? The distribution within the house comes from the power
panel.? That is they terminate the lines from outside and distribute
lines within the house from that location.? At one point I had 4
lines terminated from outside and 5 cables going off to different
locations within the house.? Over the years it became a rats nest of
connections and wires.? Even when the phone company installed the
new underground cable from the lane the rats nest remained.? Finally
I couldn't stand it any more and I found a couple of 24 place barrier
strips in the junk box and I mounted them on the wood backing of the
power panel.? I then methodically terminated the incoming lines and
the internal lines to the barrier strips.? I then drew up a
schematic with the termination numbers.? I then cross connected the
terminals to effect the desired distribution.? I used a 'LED' test
tool to make sure the polarity of every line showed 'green' at every
telephone jack.? Magically the noise stopped and the terminations
really looked professional.? When they came to install the DSL
service the installer was amazed at the setup .... 'this can't be our
work' , he said!
Jim Dunstan
Thunder Bay, ON
