[SBE] OTA digital TV interference

Mon Mar 16 17:05:18 EDT 2015

See Here. <http://www.fcc.gov/guides/antennas-and-digital-television>

Regards,

Rick Young
SBE#5633

Leben Sie Ihren Traum.
Träume nicht dein Leben.

On Mon, Mar 16, 2015 at 1:03 PM, David Baker <dbaker at addison-il.org> wrote:

> I'm going to try stepping up the quality of the antenna.  Mine is one of
> the supposedly better flat panel antennas pointed at the city, which has
> more of a directional pickup pattern
> than the kinds you buy in the $30 range, but I don't understand the other
> claims about what makes these antennas "better" than any other flat panel.
> I've always had lousy luck with these
> antennas, even a bit farther from the city where trains and multipath
> would be less of an issue.  They weren't any better than rabbit ears.
>
> If it's radiation from the trains, I think I'm out of luck.  Which is too
> bad because I prefer the quality of OTA signals and only watch a few
> channels when I have time.  My TV is 2 years old, so not so old.
> I wanted to bring this up because it seems like a major unintended
> consequence of DTV, and an additional problem besides multipath for
> broadcasters.
> My landlord suggested to just get cable, and never heard of the problem,
> probably because the majority of tenants have cable anyway.  OTA, to me,
> should always be an option.
>
> Thanks again.
>
> On Mon, Mar 16, 2015 at 1:12 PM, Henry Seiden <info at techworkspro.com>
> wrote:
>
>> FWIW, when I lived in So FL I had a condition in my immediate vicinity
>> (not trains or moving object, however) that totally blocked in the main
>> direction a specific set (VHF 7-10) of frequencies within 13 air miles from
>> the antenna farm. The reception was so full of ghosts that the TV set could
>> not discern an image on DTV. UHF lower band stations from the same general
>> direction worked fine. Then, as if by magic, replacing the old set with a
>> newer one (with apparently better decoding algorithms) made a huge
>> difference and resulted in completely viewable pictures.
>>
>> So don’t overlook the age and kinds of decoding on your TV receiver(s). I
>> did my homework and witnessed the huge 2ᴺᴰ, 3ᴿᴰ order reflections in the
>> received digital signal. Frankly don’t know how the receiver could ever
>> have worked, but it did! Then I got cable…
>>
>> Henry
>> --
>> Henry M. Seiden
>> info<at>techworkspro<dot>com
>> http://techworkspro.com
>>
>> On Mar 16, 2015, at 13:58, Jonathan Solomon <jon at thesolomonhouse.com>
>> wrote:
>>
>> Maybe a Yagi on the opposite side of the building from the train?  An
>> MATV antenna may work (for all tenants).  There should be some laws to make
>> the landlord allow an antenna.
>>
>> On Mon, Mar 16, 2015 at 1:53 PM, David Baker <dbaker at addison-il.org>
>> wrote:
>>
>>> It's becoming apparent from the responses that whether the problem is
>>> reflections or EMI, getting the antenna as far from the train as possible
>>> is my best solution.
>>> Unfortunately, I've tried moving the antenna to all available points in
>>> the building with no luck so I've run out of options there.  Also, the
>>> landlord has strict rules as to where
>>> an antenna can go.  Probably the only option left is cable TV.  It makes
>>> sense that bits are corrupt at the antenna already and can't get them back,
>>> but trying better
>>> coax wouldn't hurt.  It is a pretty long run now - about 30 feet.
>>>
>>> Thanks again to everyone who responded.
>>>
>>> On Mon, Mar 16, 2015 at 12:29 PM, Jonathan Solomon <
>>> jon at thesolomonhouse.com> wrote:
>>>
>>>> I've done many a shows parked on the streets of NYC.  Back in the days
>>>> of tube monitors, you could always tell when a train was passing underneath
>>>> as the tube went haywire.  Obviously, the bigger or better (high res)
>>>> monitor, the worse the problem.  It was only when trains went by, so I'm
>>>> guessing an EMI (Strong magnetic pull).
>>>>
>>>> As to the antenna question, what about a very directional yagi?
>>>>
>>>> On Mon, Mar 16, 2015 at 11:26 AM, Dan Slentz via SBE <sbe at sbe.org>
>>>> wrote:
>>>>
>>>>> I remember reading something about the subway trains in NYC having a
>>>>> major power interface that caused all sorts of EMI issues.   Wonder if
>>>>> potentially (pun) a metro type train (large power station centrally
>>>>> located) or even a traditional train (basically giant generator which
>>>>> powers the train since ALL trains, less steam locomotives, are actually
>>>>> electrical) are producing the interference through electrical noise
>>>>> (thinking this is more electrical interference than "train reflection".
>>>>>
>>>>>   ------------------------------
>>>>>  *From:* David Baker <dbaker at addison-il.org>
>>>>> *To:* sbe member discussion mail list <sbe at sbe.org>
>>>>> *Sent:* Monday, March 16, 2015 10:30 AM
>>>>> *Subject:* [SBE] OTA digital TV interference
>>>>>
>>>>> Good morning!
>>>>>
>>>>> I'm wondering if any TV station engineers are addressing the problem
>>>>> of OTA digital TV interference and loss near trains, or if a solution can
>>>>> be recommended for this problem.  For apartment buildings especially where
>>>>> antenna height is not an option, if that would fix the problem at all.  Can
>>>>> a filter be installed between antenna and TV that would help to remove what
>>>>> I think is EMI coming from the trains?
>>>>>
>>>>> Thanks for any suggestions!
>>>>>
>>>>> --
>>>>> Thank you,
>>>>>
>>>>> David Baker, CBTE
>>>>> <http://www.sbe.org/sections/descriptions.php#CBTE_CBRE>, CBNT
>>>>> <http://www.sbe.org/sections/descriptions.php#CBNT>
>>>>> Media Production Coordinator
>>>>> Community Relations Dept.
>>>>> Village of Addison
>>>>> office: 630-693-7554
>>>>> cell: 708-935-7829
>>>>> www.addisonadvantage.org
>>>>>
>>>>> _______________________________________________
>>>>> The SBE Roundtable, SBE at sbe.org
>>>>> To unsubscribe, go to https://pairlist7.pair.net/mailman/options/sbe
>>>>>
>>>>> https://pairlist7.pair.net/mailman/listinfo/sbe
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> The SBE Roundtable, SBE at sbe.org
>>>>> To unsubscribe, go to https://pairlist7.pair.net/mailman/options/sbe
>>>>>
>>>>> https://pairlist7.pair.net/mailman/listinfo/sbe
>>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> The SBE Roundtable, SBE at sbe.org
>>>> To unsubscribe, go to https://pairlist7.pair.net/mailman/options/sbe
>>>>
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>>>>
>>>
>>>
>>>
>>> --
>>> Thank you,
>>>
>>> David Baker, CBTE
>>> <http://www.sbe.org/sections/descriptions.php#CBTE_CBRE>, CBNT
>>> <http://www.sbe.org/sections/descriptions.php#CBNT>
>>> Media Production Coordinator
>>> Community Relations Dept.
>>> Village of Addison
>>> office: 630-693-7554
>>> cell: 708-935-7829
>>> www.addisonadvantage.org
>>>
>>> _______________________________________________
>>> The SBE Roundtable, SBE at sbe.org
>>> To unsubscribe, go to https://pairlist7.pair.net/mailman/options/sbe
>>>
>>> https://pairlist7.pair.net/mailman/listinfo/sbe
>>>
>>
>> _______________________________________________
>> The SBE Roundtable, SBE at sbe.org
>> To unsubscribe, go to https://pairlist7.pair.net/mailman/options/sbe
>>
>> https://pairlist7.pair.net/mailman/listinfo/sbe
>>
>>
>>
>> _______________________________________________
>> The SBE Roundtable, SBE at sbe.org
>> To unsubscribe, go to https://pairlist7.pair.net/mailman/options/sbe
>>
>> https://pairlist7.pair.net/mailman/listinfo/sbe
>>
>
>
>
> --
> Thank you,
>
> David Baker, CBTE <http://www.sbe.org/sections/descriptions.php#CBTE_CBRE>,
> CBNT <http://www.sbe.org/sections/descriptions.php#CBNT>
> Media Production Coordinator
> Community Relations Dept.
> Village of Addison
> office: 630-693-7554
> cell: 708-935-7829
> www.addisonadvantage.org
>
> _______________________________________________
> The SBE Roundtable, SBE at sbe.org
> To unsubscribe, go to https://pairlist7.pair.net/mailman/options/sbe
>
> https://pairlist7.pair.net/mailman/listinfo/sbe
>
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