Epilogue Take 2: Sony Trinitron Scart Input Problem - Finally nailed

On 21 March 2006, I wrote in message ...

I have an old Sony Trinitron Model: KV-X2152U (S/N:4008372) 21"
TV. Recently I purchased a Sony VTX-D800U Digital Receiver so
I could receive Freeview channels.

Unfortunately there is a problem with the television picture when I
am watching the Freeview channels. Basically, the picture keeps
breaking up. Sometimes it seems to just drop a few random patches,
other times the whole picture and the sound breaks up. Occasionally
the entire screen goes black and only the station ID banner across
the top of the screen will appear.

The random picture dropout seems to occur more frequently in areas of the
picture where there is image movement, rather than areas of unchanging
background image. The dropout is in the form of random patches made up of
quite large, square pixels.
snip

I have wasted hours trying to solve this problem and now I have finally
nailed it.

The picture break-up was caused by a nearby cordless telephone & base
station (Siemens/BT unit).

Now I have relocated the cordless phone some distance away, the picture is
perfect.
--
Mike
-Please remove 'safetycatch' from e-mail address before firing off your
reply-

"mlv" wrote in message
...

The picture break-up was caused by a nearby cordless telephone & base
station (Siemens/BT unit).

Now I have relocated the cordless phone some distance away, the picture is
perfect.

I thought this type of equipment had to conform to spurious emission
radiation requirements to receive its CE mark.

Perhaps the Sony trinitron doesn't conform by being vulnerable to
interference at the approved operating frequencies.

'Not me mate it's 'im'. I can hear the chorus already.

Roger R

In article ,
Roger R wrote:

"mlv" wrote in message
...

The picture break-up was caused by a nearby cordless telephone & base
station (Siemens/BT unit).

Now I have relocated the cordless phone some distance away, the picture
is perfect.

I thought this type of equipment had to conform to spurious emission
radiation requirements to receive its CE mark.

Perhaps the Sony trinitron doesn't conform by being vulnerable to
interference at the approved operating frequencies.

or perhaps its just a badly made scart lead.

--
From KT24 - in "Leafy Surrey"

Using a RISC OS computer running v5.11

mlv wrote:
On 21 March 2006, I wrote in message
...

I have an old Sony Trinitron Model: KV-X2152U (S/N:4008372) 21"
TV. Recently I purchased a Sony VTX-D800U Digital Receiver so
I could receive Freeview channels.

Unfortunately there is a problem with the television picture when I
am watching the Freeview channels. Basically, the picture keeps
breaking up. Sometimes it seems to just drop a few random patches,
other times the whole picture and the sound breaks up. Occasionally
the entire screen goes black and only the station ID banner across
the top of the screen will appear.

The random picture dropout seems to occur more frequently in areas of the
picture where there is image movement, rather than areas of unchanging
background image. The dropout is in the form of random patches made up of
quite large, square pixels.
snip

I have wasted hours trying to solve this problem and now I have finally
nailed it.

The picture break-up was caused by a nearby cordless telephone & base
station (Siemens/BT unit).

Now I have relocated the cordless phone some distance away, the picture is
perfect.

This is also the cause of many wireless ADSL router problems too. Often
cured by moving the devices apart and/or changing the channel the wireless
router uses.

--
Steve Parry
K100RS SE & F650
and a 520i SE Touring for comfort

This is also the cause of many wireless ADSL router problems too. Often
cured by moving the devices apart and/or changing the channel the wireless
router uses.

Sorry for being pedantic, but this may affect all wireless routers, not just
those using ADSL, unless you're saying that interference is passed down the
phone wire from the phone base station to the router.

Paul DS.

Charles suggested:

or perhaps its just a badly made scart lead.

No, the scart lead wasn't the problem.

One of the first things I tried was a replacement scart lead. In fact, I
tried three, including one costing very silly money with metal shells, 24K
gold-plated contacts, advanced multiple shielding, 99.9997% OCC copper
conductors, and integral EMI suppressors. The most noticeable outcome was
the depletion of my bank account balance ;-)
--
Mike
-Please remove 'safetycatch' from e-mail address before firing off your
reply-

No, the scart lead wasn't the problem.

One of the first things I tried was a replacement scart lead. In fact, I
tried three, including one costing very silly money with metal shells, 24K
gold-plated contacts, advanced multiple shielding, 99.9997% OCC copper
conductors, and integral EMI suppressors. The most noticeable outcome was
the depletion of my bank account balance ;-)

Such a specimen is indeed delivered once each sixty seconds.

--

Graham.
%Profound_observation%

Paul D.Smith wrote:
This is also the cause of many wireless ADSL router problems too. Often
cured by moving the devices apart and/or changing the channel the
wireless router uses.

Sorry for being pedantic, but this may affect all wireless routers, not
just those using ADSL, unless you're saying that interference is passed
down the phone wire from the phone base station to the router.

Paul DS.

sigh

no I'm saying that the wireless signal is interferred with by the signal
used by the handsfree phones ... and yes you're correct it is all wireless
routers ... I was just assuming that MOST people used wireless routers with
adsl built in at home.

--
Steve Parry
K100RS SE & F650
and a 520i SE Touring for comfort

Steve Parry wrote:
Paul D.Smith wrote:
This is also the cause of many wireless ADSL router problems too. Often
cured by moving the devices apart and/or changing the channel the
wireless router uses.

Sorry for being pedantic, but this may affect all wireless routers, not
just those using ADSL, unless you're saying that interference is passed
down the phone wire from the phone base station to the router.

Paul DS.

sigh

no I'm saying that the wireless signal is interferred with by the signal
used by the "cordless" phones ... and yes you're correct it is all
wireless
routers ... I was just assuming that MOST people used wireless routers
with adsl built in at home.

edited


--
Steve Parry
K100RS SE & F650
and a 520i SE Touring for comfort