VDSL as used in AT&T Uverse and others employs a string of carriers from
147 kHz to 7.9 MHz every 13 khZ. Each of these is a data carrier for 1-13
data bits. In the extended handshaking between the remote VRAD and the
gateway modems on customer site, the demodulation of the carriers notes
when er
On 7/17/2012 3:38 AM, N1BUG wrote:
> What about the drop from the pole to my NID? That is not twisted.
That's likely a contributor.
73, Jim K9YC
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
On 17/07/2012 16:45, Tom Boucher wrote:
> On the recommendation of John G3PQA, I recently changed my router from a
> D-Link unit to an ADDON NWAR-3670 which appears to have much better RFI
> immunity. I'm not getting any dropouts at all now and I do not have an OZ1CTK
> type filter in line, jus
Herb,
On the recommendation of John G3PQA, I recently changed my router from a D-Link
unit to an ADDON NWAR-3670 which appears to have much better RFI immunity. I'm
not getting any dropouts at all now and I do not have an OZ1CTK type filter in
line, just some ferrite rings of unknown origin on
Thanks to all who replied with ideas to make TB operation possible with
a DSL here. It appears that some boxes are better than others so I am
starting to compile a list of the good ones. I am also planing to get
some shielded drop wire from the pole. The local provider has only
unshielded de
With AT&T Uverse I had the experience of adding common mode chokes (#31
ferrite) on a long run of cat 5 and having it knock down the desired
signal. The cat 5 is not all that well balanced, and putting the hurts on
the unbalance also knocks down the main signal which was marginal to start
with.
I
Hi,
I have this knock out problem, tried ferrite beads, ferrite cores, coils,
vodoo, black magic...
I came to conclusion that some devices are really built not caring for RF
exposure. Two different revisions of a Speedstream 2400 modem behave
completely different. One could whitstand my 160m TX s
Herb,
ADSL, which sounds like what you have, has carriers right up to mid
broadcast band or so. The upper frequency carriers that go up above 1 MHz
are the from the modem to your house, while stuff down low is from you back
to the DSLAM.
This makes modems very susceptible to 160 meter signals
Groan years ago, I had a T-1 running to a teleconferencing center I
managed - over $1000 a month for 24 64-Kb channels, IIRC. Surely there
has to be a better way in most places, if only cable Internet. I get 13
MB down, 2.5 MB up from Comcast, on their mid-grade "performance"
service. No
A number of years ago I got fed up with the undependable ATT DSL. It was
too crowded and generally too slow. I went to a full T-1 with a
dedicated line. It is with Windstream out of Virginia. The service is
excellent, and if you call them they can articulate in English and are
very knowledgeabl
On 07/16/2012 10:26 PM, Jim Brown wrote:
> This is a differential mode filter, so it suggests that some or all of
> the telco cable feeding the modem isn't twisted pair, or isn't very good
> twisted pair. SO -- another solution could be replacing that poor cable
> with CAT5, using the pair within t
On 7/16/2012 10:36 PM, W2RU - Bud Hippisley wrote:
> Herb (& others) —
>
> I struggled to keep my 160- and 80-meter RF out of my DSL equipment for a
> number of years. Multiple turns of all cables in/out of the DSL modem
> (Siemens Speedstream) on #31ferrites, etc. The best progress occurred wh
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