TV channels suddenly lost
 

I have lost some channels on my TV.

I re-scanned with no change.

What's strange is I get channel 11-11 but none of the other 10 channels of 11?

I have a compass glued on my outdoor antenna, so I now it is pointed in a repeatable direction.

Any ideas what is going on?

Thanks.
Andy

TV channels suddenly lost
 

On Mon, 17 Aug 2020 18:25:13 -0700 (PDT), AK
wrote:

I have lost some channels on my TV.
I re-scanned with no change.
What's strange is I get channel 11-11 but none of the other 10 channels of 11?
I have a compass glued on my outdoor antenna, so I now it is pointed in a repeatable direction.
Any ideas what is going on?
Thanks.
Andy



Yes.
John T.

TV channels suddenly lost
 

On Mon, 17 Aug 2020 18:25:13 -0700 (PDT), AK
wrote:

I have lost some channels on my TV.

I re-scanned with no change.

What's strange is I get channel 11-11 but none of the other 10 channels of 11?

I have a compass glued on my outdoor antenna, so I now it is pointed in a repeatable direction.

Any ideas what is going on?

Thanks.
Andy

Look on the TV station web site. It might just be them.

TV channels suddenly lost
 

On 8/17/20 8:25 PM, AK wrote:
I have lost some channels on my TV.

I re-scanned with no change.

What's strange is I get channel 11-11 but none of the other 10 channels of 11?

A subchannel can have any number from 1 to 99. They don't have to be
consecutive. Since the subchannels are all coming from the same
location, and at the same frequency it would be strange to get one but
not the others.


I have a compass glued on my outdoor antenna, so I now it is pointed in a repeatable direction.

Any ideas what is going on?

Thanks.
Andy



--
"We need a new cosmology. New Gods. New Sacraments. Another drink."
[Patti Smith]

TV channels suddenly lost
 

In article ,
lid says...

A subchannel can have any number from 1 to 99. They don't have to be
consecutive. Since the subchannels are all coming from the same
location, and at the same frequency it would be strange to get one but
not the others.




The TV station is allocated a certain bandwidth. They can send one or
two programs (subchanels) at a high definition or several at a lower
definition.

TV channels suddenly lost
 

In alt.home.repair, on Tue, 18 Aug 2020 11:17:09 -0500, Sam E
wrote:

On 8/17/20 8:25 PM, AK wrote:
I have lost some channels on my TV.

I re-scanned with no change.

What's strange is I get channel 11-11 but none of the other 10 channels of 11?

A subchannel can have any number from 1 to 99. They don't have to be
consecutive. Since the subchannels are all coming from the same
location, and at the same frequency it would be strange to get one but
not the others.

Normally the case, but in the case of channel 66, I think it is, f rom
DC, it has 10 or 12 subchannels, and the first 5 or 6 transmit from one
location and I can get them, but according to some webpage the others
are from a location farther away. Only example I know of.

Also, I hesitate to mention this since I haven't tested, but channel 2
is a major channel for me and it's right here in Baltimore on
"Television Hill", and afaicr it works just fine, but 2.3 has outages
for 2 or 3 seconds. Starting a week ago, I record Law & Order from 2.3
and I'm not there at the time so I haven't checked if 2.1 is working
right when 2.3 is having these outages. I'll try to check in the next
couple days.

TV channels suddenly lost
 

On 8/17/2020 6:25 PM, AK wrote:
I have lost some channels on my TV.

I re-scanned with no change.

What's strange is I get channel 11-11 but none of the other 10 channels of 11?

I have a compass glued on my outdoor antenna, so I now it is pointed in a repeatable direction.

Any ideas what is going on?

Thanks.
Andy


Signal connection problem?

TV channels suddenly lost
 

On 8/18/2020 1:33 PM, Ralph Mowery wrote:
In article ,
lid says...

A subchannel can have any number from 1 to 99. They don't have to be
consecutive. Since the subchannels are all coming from the same
location, and at the same frequency it would be strange to get one but
not the others.




The TV station is allocated a certain bandwidth. They can send one or
two programs (subchanels) at a high definition or several at a lower
definition.

WMAR broadcasts on 4 multiplexed subchannels, 2.1, 2.2., 2.3, and 2.4.
FCC bandwidth limitations allow a digital TV station with one HD signal
to multiplex 3 SD subchannels. If a station wants to transmit 2 HD
subchannels, it can only accommodate and additional 1 SD subchannel.
Since WMAR operates 2.1 as a HD signal, we can assume that 2.2, 2.3, and
2.4 are all SD transmissions. To enable the multiplexing, the magnitude
of signal compression for the 3 SD signals must be greater than the
magnitude of compression used on the HD signal in order to provide
sufficient bandwidth for all the information required by the HD signal
(channel 2.1). So, we know that channels 2.2 - 2.4 are relatively
highly compressed.

Why is that relevant to your problem? Any interference, such as aircraft
interposition between your antenna and the transmitter's antenna, or
producing multi-path signals, extraneous pulse noise, etc. that is
likely to adversely affect HD TV reception will have a greater effect on
a highly compressed signal than on a less compressed signal. Therefore,
you might find that you're getting more drop outs or other reception
problems on 2.2 -2.4 than on 2.1 even though the transmitter's effective
radiated power will be the same for all 4 subchannels. If you are
anywhere near the flight patterns used by BWI aircraft or by Baltimore
traffic helicopters, you're probably having multi-path reception
problems. Short of using a very highly directional hi-gain antenna with
a rotor on the mast, it's a difficult problem to resolve. Or, a local
amateur radio operator's 2 meter transmitter could be improperly
creating a 4th harmonic signal that would be quite close to the 0.55
meter wavelength of WMAR's signal. Good luck.

TV channels suddenly lost
 

On Monday, August 17, 2020 at 9:25:18 PM UTC-4, AK wrote:
I have lost some channels on my TV.

I re-scanned with no change.

What's strange is I get channel 11-11 but none of the other 10 channels of 11?

I have a compass glued on my outdoor antenna, so I now it is pointed in a repeatable direction.

Any ideas what is going on?

Thanks.
Andy

Does that one channel come in solid? In my experience, I've never seen one
channel come in fine, the other sub channels not come in at all. When they
are flakey though, not unusual to see one come in somewhat OK, but others
worse. HDTV is highly unpredictable, unless you're in good, clear range
and have the right antenna. I've seen stations that come in fine many days,
but breaking up badly or go on other days. It can change within a couple
of minutes from fine to unwatchable. And it's not like it's predictable,
that it's only during bad weather. Wind seems to be one factor, but there
are times when there is no wind, weather seems OK and it can crap out.
I guess that's one reason why so many are still cable customers.

TV channels suddenly lost
 

On Tuesday, August 18, 2020 at 4:54:31 PM UTC-5, trader_4 wrote:
On Monday, August 17, 2020 at 9:25:18 PM UTC-4, AK wrote:
I have lost some channels on my TV.

I re-scanned with no change.

What's strange is I get channel 11-11 but none of the other 10 channels of 11?

I have a compass glued on my outdoor antenna, so I now it is pointed in a repeatable direction.

Any ideas what is going on?

Thanks.
Andy

Does that one channel come in solid? In my experience, I've never seen one
channel come in fine, the other sub channels not come in at all. When they
are flakey though, not unusual to see one come in somewhat OK, but others
worse. HDTV is highly unpredictable, unless you're in good, clear range
and have the right antenna. I've seen stations that come in fine many days,
but breaking up badly or go on other days. It can change within a couple
of minutes from fine to unwatchable. And it's not like it's predictable,
that it's only during bad weather. Wind seems to be one factor, but there
are times when there is no wind, weather seems OK and it can crap out.
I guess that's one reason why so many are still cable customers.

My reception got better on the bad channels.

I think it might have been due to atmospheric conditions.

Andy