Problem with Modulator?

[js5895]

Hi,

I bought a Jensen RF Modulator. I hooked up the input/output RF cables
and powered it up but, every time I plug in the composite video cable,
I lose channels 22 and lower, except for channels 3 or 4 for the
inputted
signal, 23 and higher gradually come back as I go up towards channel 45
and then gradually go out again when I go higher. Also there's no
digital
cable. Is there a problem with this? or is this normal function.
All I want to do is input a composite video signal with sound, and have
it on channel 3 or 4, and keep all the other channels intact.

Thanks, for all your help.

 

[Dana Raymond]

Hi,

I bought a Jensen RF Modulator. I hooked up the input/output RF cables
and powered it up but, every time I plug in the composite video cable,
I lose channels 22 and lower, except for channels 3 or 4 for the
inputted
signal, 23 and higher gradually come back as I go up towards channel 45
and then gradually go out again when I go higher. Also there's no
digital
cable. Is there a problem with this? or is this normal function.
All I want to do is input a composite video signal with sound, and have
it on channel 3 or 4, and keep all the other channels intact.

Thanks, for all your help.

Sounds like you are connecting the RF modulator output and your digital
cable box to the TV at the same in, in parrallel. Is that right?

OK, so in one word: DON'T. Those 2 devices are not designed to be connected
that way and you may lose your Cable box and/or Modulator completely!

This may be too obvious a thought, but why don't you get yourself a TV with
component video and sound inputs and lose the modulator?, or even get one of
those handy-dandy composite cable RF switches from RadioShack?

http://www.radioshack.com/product.a..._name=CTLG_003_010_011_000&product_id=15-1968

Dana

 

[js5895]

I don't understand what you mean, are you saying that I
connected RF output to an RF output or, modulator output
to TV input and cable output to TV input at the same time
then, no, everything is connected in series.

The main TV does have composite video inputs. I want my
computer's video signal on my TV for movies. The reason
for the modulator is so I can use one cable instead of
three and, yeah, I know I will lose quality but, instead
of tuning to channel "input", I want it on a normal
channel like 3 or 4 and keep all the other signals intact,
also I have other TV's I want it on

Thanks, Josh.

 

[Don Bowey]

I don't understand what you mean, are you saying that I
connected RF output to an RF output or, modulator output
to TV input and cable output to TV input at the same time
then, no, everything is connected in series.

The main TV does have composite video inputs. I want my
computer's video signal on my TV for movies. The reason
for the modulator is so I can use one cable instead of
three and, yeah, I know I will lose quality but, instead
of tuning to channel "input", I want it on a normal
channel like 3 or 4 and keep all the other signals intact,
also I have other TV's I want it on

Thanks, Josh.

If your cable service provider has a signal on chan 3 &4, then there is no
way you can add another signal on chan 3 or 4 without first blocking the
network signal on the channel(s) or using a switch to transfer the TV
between the signal sources.

Don

 

[Fred Bloggs]

Hi,

I bought a Jensen RF Modulator. I hooked up the input/output RF cables
and powered it up but, every time I plug in the composite video cable,
I lose channels 22 and lower, except for channels 3 or 4 for the
inputted
signal, 23 and higher gradually come back as I go up towards channel 45
and then gradually go out again when I go higher. Also there's no
digital
cable. Is there a problem with this? or is this normal function.
All I want to do is input a composite video signal with sound, and have
it on channel 3 or 4, and keep all the other channels intact.

That is how the modulator is supposed to work- with no video input, it
will feed your cable RF IN to RF OUT to the TV unaltered- when video is
input to the modulator, it detects this automatically and switches your
cable RF IN off and applies the modulated video/sound to RF OUT on CH
3/4- your cable channels will feed through but they are attenuated
(weakened or made smaller in power level).

 

[js5895]

But video game modulators keep the other channels
intact, why can't this do the same thing?

 

[Fred Bloggs]

But video game modulators keep the other channels
intact, why can't this do the same thing?

I assume this is to obtain a cleaner signal on ch 3/4 and the cheapest
possible retail price. If you want to watch the cable channels then turn
your video source off- why would you have this running when you are not
watching it?- are you time division viewing or something?

 

[js5895]

The computer signal is difficult to turn on and off and,
someone else watches TV and that signal. Also I work on the
computer at the same time. Not sure what "time division viewing"
is.