The five multiplex (Cambs & Beds).

"tony sayer" wrote in message
...
In article , ian field gangprobing.
scribeth thus

"tony sayer" wrote in message
...
In article , ian field gangprobing
scribeth thus

"tony sayer" wrote in message
...
In article , Brian
Gaff
scribeth thus
Well, it could just be an accident of the size compared to the actual
frequency. Other than trees, I guess it could be desensitisation by
some
nearby transmitter of a taxi firm or similar,

Very few of them left now and the ones that are, are on a hilltop
site..

but you could suggest this
also would affect them all. It also seems strange if its a
transmitting
aerial problem for the same commonality reason. That only leaves a
dodgy
transmitter for that multiplex, which, I'd have thought would have had
so
many people complaining it would be fixed pdq.

What after it took them ages to get Hannington fixed


It seems to vary somewhat with the weather, today the signal quality
bargraph is showing a solid 100%, on other days it fluctuates wildly.

There's a six output booster distributing to various rooms with 8.6dB
gain
and a 2 output booster with 16.8dB has been added in front of that with
the
result, the bargraph spends less time on the bottom and a noticeable
reduction of squares and "blue screen of death", I was wondering if I
could
get away with adding another 16.8dB booster - the claimed noise per
booster
is 3dB.



Seems to me that a bit more aerial gain might cope better . Can you say
where are you and where the aerial is?..
--

The aerial is on the roof and the rigger damaged the roof causing serious
leaks last time, as long as the aerial looks to be OK I'd prefer not to
send
any more expensive cowboys up there!!!



Well thats seems to indicate all isn't as well as what it ought be up
there either!. Any idea or have you a pix of what's actually up there?..

All the other channels work fine, its only the multiplex that carries five
and Virgin1 - that wouln't be the case if the aerial was dodgy.

And any approximation of where you are relative to Sandy?..
--
Tony Sayer


If I stood on the roof at night I could see the lights on the tower that
stop aircraft flying into it.

"ian field" wrote in message
...
The following freeview channels: Five (5), QVC (16), Virgin1 (20), Bid TV
(23), Fiver (30) and 5 USA (31) are all flaky with squares most of the
time
and frequent "blue screen of death".

In the status menu, the signal quality bargraph goes up and down like a
yo-yo - including up to 100% and all the other channels are OK so its
reasonable to assume the aerial isn't too bad, so can anyone tell me
what's
going on?

TIA.



Some tuners have the inability to show the correct signal strength..
I have had several DVB-S tuners (yes, I know it's not freeview) that would
show 100% signal, but they were actually only showing 0% (no signal at all)
or 100% (some signal - full signal)..

Possibly there is some other noise that's appearing in the same frequency
spread?...

The most likely reason for it is that the BBC has once again used our money
to try and thwart other operators from having valid stations.. If they can
shove them out for good then they can give us radio1 DJ's in high def sound
and bump their salarys up by an extra 2m/year. *joking btw*...

We all know they would get an extra 5m/year.

"ian field" wrote in message
...

"tony sayer" wrote in message
...
In article , ian field gangprobing.
scribeth thus

"tony sayer" wrote in message
...
In article , ian field
gangprobing
scribeth thus

"tony sayer" wrote in message
...
In article , Brian
Gaff
scribeth thus
Well, it could just be an accident of the size compared to the
actual
frequency. Other than trees, I guess it could be desensitisation by
some
nearby transmitter of a taxi firm or similar,

Very few of them left now and the ones that are, are on a hilltop
site..

but you could suggest this
also would affect them all. It also seems strange if its a
transmitting
aerial problem for the same commonality reason. That only leaves a
dodgy
transmitter for that multiplex, which, I'd have thought would have
had
so
many people complaining it would be fixed pdq.

What after it took them ages to get Hannington fixed


It seems to vary somewhat with the weather, today the signal quality
bargraph is showing a solid 100%, on other days it fluctuates wildly.

There's a six output booster distributing to various rooms with 8.6dB
gain
and a 2 output booster with 16.8dB has been added in front of that
with
the
result, the bargraph spends less time on the bottom and a noticeable
reduction of squares and "blue screen of death", I was wondering if I
could
get away with adding another 16.8dB booster - the claimed noise per
booster
is 3dB.



Seems to me that a bit more aerial gain might cope better . Can you
say
where are you and where the aerial is?..
--

The aerial is on the roof and the rigger damaged the roof causing
serious
leaks last time, as long as the aerial looks to be OK I'd prefer not to
send
any more expensive cowboys up there!!!



Well thats seems to indicate all isn't as well as what it ought be up
there either!. Any idea or have you a pix of what's actually up there?..

All the other channels work fine, its only the multiplex that carries five
and Virgin1 - that wouln't be the case if the aerial was dodgy.

And any approximation of where you are relative to Sandy?..
--
Tony Sayer


If I stood on the roof at night I could see the lights on the tower that
stop aircraft flying into it.



I think tony was trying to help you...
Take a picture of your antenna..
Give a DIRECTION and some Mileage from the tower (I live 4 miles ssw of it)
or something of the ilk

In article , ian field gangprobing
scribeth thus

"tony sayer" wrote in message
...
In article , ian field gangprobing.
scribeth thus

"tony sayer" wrote in message
...
In article , ian field gangprobing
scribeth thus

"tony sayer" wrote in message
...
In article , Brian
Gaff
scribeth thus
Well, it could just be an accident of the size compared to the actual
frequency. Other than trees, I guess it could be desensitisation by
some
nearby transmitter of a taxi firm or similar,

Very few of them left now and the ones that are, are on a hilltop
site..

but you could suggest this
also would affect them all. It also seems strange if its a
transmitting
aerial problem for the same commonality reason. That only leaves a
dodgy
transmitter for that multiplex, which, I'd have thought would have had
so
many people complaining it would be fixed pdq.

What after it took them ages to get Hannington fixed


It seems to vary somewhat with the weather, today the signal quality
bargraph is showing a solid 100%, on other days it fluctuates wildly.

There's a six output booster distributing to various rooms with 8.6dB
gain
and a 2 output booster with 16.8dB has been added in front of that with
the
result, the bargraph spends less time on the bottom and a noticeable
reduction of squares and "blue screen of death", I was wondering if I
could
get away with adding another 16.8dB booster - the claimed noise per
booster
is 3dB.



Seems to me that a bit more aerial gain might cope better . Can you say
where are you and where the aerial is?..
--

The aerial is on the roof and the rigger damaged the roof causing serious
leaks last time, as long as the aerial looks to be OK I'd prefer not to
send
any more expensive cowboys up there!!!



Well thats seems to indicate all isn't as well as what it ought be up
there either!. Any idea or have you a pix of what's actually up there?..

All the other channels work fine, its only the multiplex that carries five
and Virgin1 - that wouln't be the case if the aerial was dodgy.

Not necessarily

And any approximation of where you are relative to Sandy?..
--
Tony Sayer


If I stood on the roof at night I could see the lights on the tower that
stop aircraft flying into it.



Well something very wrong there then, any chance of a close up pix of
said aerial?..
--
Tony Sayer

On Thu, 18 Jun 2009 22:26:47 +0100, "ian field"
wrote:

The following freeview channels: Five (5), QVC (16), Virgin1 (20), Bid TV
(23), Fiver (30) and 5 USA (31) are all flaky with squares most of the time
and frequent "blue screen of death".

In the status menu, the signal quality bargraph goes up and down like a
yo-yo - including up to 100% and all the other channels are OK so its
reasonable to assume the aerial isn't too bad, so can anyone tell me what's
going on?

TIA.

Is this a communal aerial or is there an aerial amplifier? I believe
these can sometimes affect one multiplex.

"Scott" wrote in message
...
On Thu, 18 Jun 2009 22:26:47 +0100, "ian field"
wrote:

The following freeview channels: Five (5), QVC (16), Virgin1 (20), Bid TV
(23), Fiver (30) and 5 USA (31) are all flaky with squares most of the
time
and frequent "blue screen of death".

In the status menu, the signal quality bargraph goes up and down like a
yo-yo - including up to 100% and all the other channels are OK so its
reasonable to assume the aerial isn't too bad, so can anyone tell me
what's
going on?

TIA.

Is this a communal aerial or is there an aerial amplifier? I believe
these can sometimes affect one multiplex.

Its a single house installation specifically ordered from the rigger to be
DVB-T compatible, an 8.6dB 6 way splitter/booster was added at the bottom of
the downlead to serve several rooms.

A second booster was added some months ago when there was poor signal on
the multiplex carrying the ITV channels, that was left in place after the
signal improved again, but more recently the multiplex carrying Five and
Virgin1 has become weak, the booster was then replaced with one having
higher gain (16.8dB) that improved reception slightly but it varies from
perfectly OK one day to fluctuating wildly the next.

Someone in an earlier reply said Sandy Heath had aerial work recently -
looks like they're having maintenance problems.

On Mon, 22 Jun 2009 22:46:38 +0100, "ian field"
wrote:


"Scott" wrote in message
.. .
On Thu, 18 Jun 2009 22:26:47 +0100, "ian field"
wrote:

The following freeview channels: Five (5), QVC (16), Virgin1 (20), Bid TV
(23), Fiver (30) and 5 USA (31) are all flaky with squares most of the
time
and frequent "blue screen of death".

In the status menu, the signal quality bargraph goes up and down like a
yo-yo - including up to 100% and all the other channels are OK so its
reasonable to assume the aerial isn't too bad, so can anyone tell me
what's
going on?

TIA.

Is this a communal aerial or is there an aerial amplifier? I believe
these can sometimes affect one multiplex.

Its a single house installation specifically ordered from the rigger to be
DVB-T compatible, an 8.6dB 6 way splitter/booster was added at the bottom of
the downlead to serve several rooms.

A second booster was added some months ago when there was poor signal on
the multiplex carrying the ITV channels, that was left in place after the
signal improved again, but more recently the multiplex carrying Five and
Virgin1 has become weak, the booster was then replaced with one having
higher gain (16.8dB) that improved reception slightly but it varies from
perfectly OK one day to fluctuating wildly the next.

Someone in an earlier reply said Sandy Heath had aerial work recently -
looks like they're having maintenance problems.

Have you tried without the booster? I thought boosters were a bad
idea for digital and also that the connection from aerial to decoder
should be uninterrupted.

Its a single house installation specifically ordered from the rigger to be
DVB-T compatible, an 8.6dB 6 way splitter/booster was added at the bottom of
the downlead to serve several rooms.

A second booster was added some months ago when there was poor signal on
the multiplex carrying the ITV channels, that was left in place after the
signal improved again, but more recently the multiplex carrying Five and
Virgin1 has become weak, the booster was then replaced with one having
higher gain (16.8dB) that improved reception slightly but it varies from
perfectly OK one day to fluctuating wildly the next.

Someone in an earlier reply said Sandy Heath had aerial work recently -
looks like they're having maintenance problems.



If your having to add a "booster" when you can see the top of the
aircraft warning lights then it rather seems to me that something is
very wrong with the aerial system there.

All channels are fine here and equal level at 18 miles LOS from Sandy
just south of Cambridge so I rather doubt its a transmitter problem...

I can't recommended anyone but it would seem to me that the attentions
of a "competent" rigger are called for....

Any possibility you could post some pix of this aerial just to make sure
that its the right sort and pointing in the right direction and are
there any large trees etc nearby?..
--
Tony Sayer

On Mon, 22 Jun 2009 22:46:38 +0100, ian field
wrote:

Its a single house installation specifically ordered from the rigger to be
DVB-T compatible, an 8.6dB 6 way splitter/booster was added at the bottom of
the downlead to serve several rooms.

There is no point putting a booster at the bottom if the problem is lack
of signal. It needs to go at the top. If you just need to split, then you
must have adequate signal level first.

A second booster was added some months ago when there was poor signal on
the multiplex carrying the ITV channels, that was left in place after the
signal improved again, but more recently the multiplex carrying Five and
Virgin1 has become weak, the booster was then replaced with one having
higher gain (16.8dB) that improved reception slightly but it varies from
perfectly OK one day to fluctuating wildly the next.

Added where?
Increasing gain doesn't generally increase receive margin, especially if
put in the wrong place.

You need to get levels measured at the top and then work out where to go
from there.

On Mon, 22 Jun 2009 23:02:37 +0100, Scott wrote:

Have you tried without the booster? I thought boosters were a bad
idea for digital and also that the connection from aerial to decoder
should be uninterrupted.

Both are myths spread by the ignorant.