Re: Channel Vision LPF-600 Doesn't do what it's supposed to...

["Robert L Bass" <robertbass1@xxxxxxxxxxx>]

> I've been modulating channels on my home system for years.  I've been
> using a Channel Plus 3445 (4 channel modulator) and a filter that
> filters out 75-80.  Problem is that with 2 channel separation I can't
> input all 4 channels off of my CP3445.  This hasen't been a problem
> until just recently when I added the 4th device.  I used to modulate on
> channels 75-77 and 79.  Put something on 81 and it's all fuzzy.
>
> So I bought a Channel Vision LPF-600 which is supposed to block 86 and
> above.  The part I missed was at the bottom of the description it says
> it won't block 95-99 on cable systems.  Seems misleading when it says
> at the top of the description that it blocks >86.

ISTR 95 through 99 are mid-band channels.  That might be the reason.  This isn't my primary area so I'm not 100% certain.

> Another problem is that 88 & 90 when assigned to the modulator are
> fuzzy...

Most filters are not like a brick wall but more like a steep sloping hill.  You need to stay one or two channels away from the
limits.

> I don't get a clear picture untill 92, but by the time I go to
> 92 then I run into the upper end (95-99) which it also doesn't block.

Unless I'm wrong about the frequency range of 95-99, you're probably not going to have much luck in that range.  If no one is able
to help you resolve this you might want to contact ChannelPlus tech support.  It takes a few minutes to get through but they're
extremely helpful folks with in-depth understanding (not the usual droids reading scripted answers).  Their toll free line is
800-999-5225.  The auto-attendant says it's the Linear Group because Linear bought ChannelPlus a few years ago.

> Defeats the whole purpose of why I bought it.  I put it in series with
> my other filter, kept 3 of my channels at 75, 77 & 79 and put the 4th
> channel at 92 and everything is clear.  Only problem is that my cable
> company uses channel 79 for a channel I really want and have been
> missing for years.

ChannelPlus used to offer custom notch filters.  They're made to order and they take a while to get but if they still make them that
may be your best bet.  IIRC, they also used to sell direct but if that's a problem let me know (I'm a dealer) and I'll try to help.

--

Regards,
Robert L Bass

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