Video signal drop- even with amp

I have a whole house audio/video system. The I don't have video
switching (doesn't work on my dist. amp). Anyway, I am trying to take
a video signal from a Panasonic DVD player in my a/v closet and send it
to 2 tvs.

I can't use digital outputs because I only have coax in the wall to the
tvs. Anyway, I am taking the video out on the DVD, and using an adapter
to convert to coaxial. The coaxial is being split to an lcd projector
and a LCD tv. Problem is, whenever I hook up the tv, the projector
loses the signal (screen goes blue). I've tried several splitters
including a powered amplifying splitter with no luck. Also, I split my
satellite signal with no problem (separately).

Any ideas on what I can do to get this signal to both displays at once?
Is the DVd player putting out a really week signal? Note I don't want
a switcher - I actually want it on both displays at once.

"Mike C" writes:

I have a whole house audio/video system. The I don't have video
switching (doesn't work on my dist. amp). Anyway, I am trying to take
a video signal from a Panasonic DVD player in my a/v closet and send it
to 2 tvs.

I can't use digital outputs because I only have coax in the wall to the
tvs. Anyway, I am taking the video out on the DVD, and using an adapter
to convert to coaxial. The coaxial is being split to an lcd projector
and a LCD tv. Problem is, whenever I hook up the tv, the projector
loses the signal (screen goes blue). I've tried several splitters
including a powered amplifying splitter with no luck. Also, I split my
satellite signal with no problem (separately).

Any ideas on what I can do to get this signal to both displays at once?
Is the DVd player putting out a really week signal? Note I don't want
a switcher - I actually want it on both displays at once.


You can not correctly split a video signal passively between two
devices. The signal is terminated into 75 ohms into each end, i e the
DVD player feeds the signal through a 75 ohm resistor, while each of
the displays terminate the signal through a 75 ohm resistor to
ground. Connecting two devices in parallel makes that 37.5 ohm in the
display end, which is what is causing the low signal.

Some professional devices have pass through connections, where you can
daisy chain multiple devices, and then you disconnect the termination
on all but the last device.

Your best bet is to get a simple video distribution amplifier with
multiple outputs, which will feed proper signals to all your devices.

On the other hand it appears that you have tested that, but it seems
strange that it doesn't work.

You say you have an adapter that converts to coax, from what? All DVD
players I've seen have been able to output composite, which is what
you need, as well as the other better formats like S-video, component
or RGB.

I'm using a Radio Shack unit that allows me to split S-video to both a
projector and TV:
http://www.radioshack.com/product/in...tPage=s earch

Apparently they have a simlar unit for component video as well.

Thomas Tornblom wrote:
"Mike C" writes:

I have a whole house audio/video system. The I don't have video
switching (doesn't work on my dist. amp). Anyway, I am trying to take
a video signal from a Panasonic DVD player in my a/v closet and send it
to 2 tvs.

I can't use digital outputs because I only have coax in the wall to the
tvs. Anyway, I am taking the video out on the DVD, and using an adapter
to convert to coaxial. The coaxial is being split to an lcd projector
and a LCD tv. Problem is, whenever I hook up the tv, the projector
loses the signal (screen goes blue). I've tried several splitters
including a powered amplifying splitter with no luck. Also, I split my
satellite signal with no problem (separately).

Any ideas on what I can do to get this signal to both displays at once?
Is the DVd player putting out a really week signal? Note I don't want
a switcher - I actually want it on both displays at once.


You can not correctly split a video signal passively between two
devices. The signal is terminated into 75 ohms into each end, i e the
DVD player feeds the signal through a 75 ohm resistor, while each of
the displays terminate the signal through a 75 ohm resistor to
ground. Connecting two devices in parallel makes that 37.5 ohm in the
display end, which is what is causing the low signal.

Some professional devices have pass through connections, where you can
daisy chain multiple devices, and then you disconnect the termination
on all but the last device.

Your best bet is to get a simple video distribution amplifier with
multiple outputs, which will feed proper signals to all your devices.

On the other hand it appears that you have tested that, but it seems
strange that it doesn't work.

You say you have an adapter that converts to coax, from what? All DVD
players I've seen have been able to output composite, which is what
you need, as well as the other better formats like S-video, component
or RGB.

I'm using a Radio Shack unit that allows me to split S-video to both a
projector and TV:
http://www.radioshack.com/product/in...tPage=s earch

Apparently they have a simlar unit for component video as well.

I am using the composite video out with a connector to take that to
coxial connector since the DVD player doesn't have coax out.

I tried using a 1 in- 4 out amplified splitter and didn't notice any
difference,

You need to use a powered active VIDEO splitter,
not a cable TV splitter. Radio Shack makes an
affordable one that works pretty well, it has
adjustable gain control. Without an active
splitter your system wont work right.