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HD INTERFERENCE

M

menotti1

Guest
WOR's HD comes on at :28 seconds into the clip.

Receiver: Magnavox 563 AM-FM-PSB radio (circa 1978) No external antanna, running off batteries.

WLW MIDNITE WOR HD START AT ABOUT 28 SECONDS
www.savefiles.com/files/1056613

Listen for yourself.you won't believe it.
 
menotti1 said:
WOR's HD comes on at :28 seconds into the clip.

Receiver: Magnavox 563 AM-FM-PSB radio (circa 1978) No external antanna, running off batteries.

WLW MIDNITE WOR HD START AT ABOUT 28 SECONDS
www.savefiles.com/files/1056613

Listen for yourself.you won't believe it.
Click to expand...

Say, I hate to be an ass, but where did this occur? New York? LA? CinCinatti?

Is it local interference or DX?

Clouseau
 
http://www.sendspace.com/file/ruv0bq

try this fileWOR's HD comes on at :28 seconds into the clip.

Receiver: Magnavox 563 AM-FM-PSB radio (circa 1978) No external antanna, running off batteries.

WLW MIDNITE WOR HD START AT ABOUT 28 SECONDS , .WLW IS IN CINCINATTI,WOR NEW YORK reception was in new york..
 
Re: HD INTERFERENCE WLW in NYC (for the first time)

Via their stream:http://www.sendspace.com/file/enxsft

Lots of artifact, no fading, no noise. available 24hrs.

BTW: you have great reception whever you are. I've never been able to get wlw w/out tons of splatter from WOR, even with carefully peaked Grundigs.

Lino
 
menotti1 said:
http://www.sendspace.com/file/ruv0bq

try this fileWOR's HD comes on at :28 seconds into the clip.

Receiver: Magnavox 563 AM-FM-PSB radio (circa 1978) No external antanna, running off batteries.

WLW MIDNITE WOR HD START AT ABOUT 28 SECONDS , .WLW IS IN CINCINATTI,WOR NEW YORK reception was in new york..
Click to expand...
Where in New York? Considering that it's a first adjacent, I don't think the interference is that bad if you're in NYC. What would it have sounded like 50 years ago when the clears were still clear but AM radio stations ran programming that uses higher audio frequencies, like music?

I wasn't around when the clear channels were truly clear and music was still common on AM, but you should have heard what Mexican station XETRA 690 was doing to first adjacent KNBR about 2 years ago when it was managed by Clear Channel and was running Adult Standards. The noise was enough to make KNBR temporarily inaudible north of downtown LA on typical radios lacking SSB. IBOC hiss is annoying, but the hiss in your recording is actually consistent less annoying than the unpredictable analog splatter I was hearing from XETRA.

Farther south, in Orange and coastal sections of San Diego counties, KNBR would sometimes disappear under splatter for 1-2 minutes at a time, depending on the song being played on 690. At times the splatter, combined with KNBR fadeouts, would be enough to cause even my receiver with SSB capabilities to lose its sync lock, causing an audible signal to suddenly and unexpectedly be replaced by something just as annoying as local IBOC first adjacent hiss.

This is why I think the mask should be restricted to -30 dBc @ 5 kHz, -50 dBc at 7.5 kHz, and -70 dBc at 10 kHz. 50 kW of pure digital would go pretty darn far under those conditions, and wouldn't buzz all over neighboring stations.
 
awj223 said:
menotti1 said:
http://www.sendspace.com/file/ruv0bq

try this fileWOR's HD comes on at :28 seconds into the clip.

Receiver: Magnavox 563 AM-FM-PSB radio (circa 1978) No external antanna, running off batteries.

WLW MIDNITE WOR HD START AT ABOUT 28 SECONDS , .WLW IS IN CINCINATTI,WOR NEW YORK reception was in new york..
Click to expand...
Where in New York? Considering that it's a first adjacent, I don't think the interference is that bad if you're in NYC. What would it have sounded like 50 years ago when the clears were still clear but AM radio stations ran programming that uses higher audio frequencies, like music?
Click to expand...
If WLW was coming through WOR's digital sideband in NYC, that doesn't bode well for WOR's digital coverage at night.
 
menotti1 said:
http://www.sendspace.com/file/ruv0bq

try this fileWOR's HD comes on at :28 seconds into the clip.

Receiver: Magnavox 563 AM-FM-PSB radio (circa 1978) No external antanna, running off batteries.

WLW MIDNITE WOR HD START AT ABOUT 28 SECONDS , .WLW IS IN CINCINATTI,WOR NEW YORK reception was in new york..
Click to expand...
TOTALLY UNREAL!!!!!!!

It went from a totally excellent signal to crap with noise underneath it!!!!!
 
Re: HD INTERFERENCE WLW in NYC (for the first time)

LinoNYC said:
Via their stream:http://www.sendspace.com/file/enxsft

Lots of artifact, no fading, no noise. available 24hrs.

BTW: you have great reception whever you are. I've never been able to get wlw w/out tons of splatter from WOR, even with carefully peaked Grundigs.

Lino
Click to expand...

The 563 rips any portable AM radio to shreds. I wish I had known about it years ago, I just picked it off eBay last May.
 
Re: HD INTERFERENCE - NIGHTMARE WORST CASE SCENARIO!!!

WOAI destroys KFXR Dallas - IN THEIR PROTECTED CONTOURS.

The shocker - the local 700 here in the area has IBOC hiss on it - so does WGN - BAD. The only culprit I could find - WOR!!!! I never get WOR analog in here because of KEEL. To check it, I nulled in the direction of NY - sidebands null.
 
wgliradio said:
My recording. This was approx 65 miles east of WOR's towers.
Click to expand...
Are you saying that the recording posted in this thread is your recording, and was recorded 65 miles east of WOR? The OP has still not revealed the location of the recording..."New York" could refer to either the city or the state.

Though I am an opponent of hybrid IBOC on mediumwave (believing that AM stations should be allowed to use pure analog or pure digital ONLY and with much more strict emission masks), I have to say that if the recording was taken in NYC itself, it does not do a good job arguing against running HD Radio at night. The hiss is no worse than sideband splatter from a music station. Now on the other hand if it was taken in upstate NY, in the null of WOR...yikes!

Why is WOR wasting so much of its directional power over the ocean? Since they're a class A and can do anything they want, why don't they transmit from Long Island and beam inland like WBZ?
 
menotti1 said:
reception was in new york..
Click to expand...

You still haven't answered the question WHERE in NY. Being relatively close to our transmitter, what do you expect?

For the person who stated that this doesn't bode well for WOR's night HD coverage - it is the same as our day coverage. Nothing has changed. I drive into the null every night, and our HD signal drops in exactly the same place....and yes, WLW has been booming in the past several nights.

If you are basing your observation of our directional power on a predicted contour, that is slightly deceptive. We are sucking power in from the ocean. However, salt water is a fantastic conductor, and the conductivity increases dramatically. That lobe would be even larger if we didn't pull in.

I live in "upstate NY"....at the foot of the catskills. I had WLW last night absolutely clean - and WGN weak but in there....with no hiss heard.

Tom Ray
WOR
 
Re: HD INTERFERENCE - NIGHTMARE WORST CASE SCENARIO!!!

rbrucecarter5 said:
WOAI destroys KFXR Dallas - IN THEIR PROTECTED CONTOURS.

The shocker - the local 700 here in the area has IBOC hiss on it - so does WGN - BAD. The only culprit I could find - WOR!!!! I never get WOR analog in here because of KEEL. To check it, I nulled in the direction of NY - sidebands null.
Click to expand...

Bruce:

1) Where are you listening?
2) What about the Nighttime Interference Free contour? There is no guarantee of protection outside that contour at night. The "protected contour" is only there as a reference for station spacing.

Tom Ray
WOR
 
Tom Ray said:
menotti1 said:
reception was in new york..
Click to expand...

For the person who stated that this doesn't bode well for WOR's night HD coverage - it is the same as our day coverage. Nothing has changed. I drive into the null every night, and our HD signal drops in exactly the same place....and yes, WLW has been booming in the past several nights.

Tom Ray
WOR
Click to expand...

As I said in previous posts, I was sketical that HD would work well at night, but am encouraged by your report that it does. I am still skeptical as to how it will work for the regionals and graveyards. I took a ride around the Cincinnati area last night and WLW performed well in the immediate metropolitan area. There were occasional dropouts near powerlines and while going under bridges, but the signal generally remained intact. As an aside, KMOX and WTAM ocassionally "locked-in." I am curious as to how stations like WOR and WLW will perform in homes near computers, switches, television sets, etc. WLW performs well in my house, but I am within 10 miles of their tower and good reception is expected. I guess time will tell. One observation I made was the digital signal was still preserved while the sidebands sounded somewhat degraded. This indicates the all-digital mode would be effective even for the lower-powered stations. Does anyone here know what power levels would be permitted for the all-digital mode?
 
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