02-24-2011 05:58:02 AM - edited 02-24-2011 05:58:41 AM
Every morning the graph drops around 7:30 a.m. and comes back at 7:30 p.m. at the .946 to 1.4 mhz range. This is NOT causing any connectivity or speed issues. I am just curious what would kind of equipment of whatever would cause this. It goes from 9bits to 2 bits in the range of .946 to 1.4 peaking down at 1.1. Thanks
02-24-2011 06:58:28 AM
Please post 2 screenshots of the bitloading graph under both conditions.
02-24-2011 07:41:18 AM - edited 02-24-2011 07:44:23 AM
It sounds like you are on the daytime beam of a local AM radio station (or maybe more than one). As the sunrise / sunset schedule does it's seasonal advance, you'll probably see those times change to follow.
AM stations with multiple towers can steer their signal by altering the phase of the input signal to each tower. During daylight they aim towards one market group, at night (if they are licensed for after sunset) they steer the signal to another market.
Do you have a AM radio station ~ 1100KHz in your area? For serious interference, it usually has to be ~5-8 miles or closer, depending on their output power. If your VDSL signal is affected significantly, it tends to point to a broken shield or poor ground / bond on the outside plant feeding your house. In some extreme cases, the signal can affect an entire VRAD, though this is fairly rare these days.
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02-24-2011 09:20:25 AM
Yep, I bet that's an AM radio station within 2 miles. They're transmitting from 0730 to 1930.
Find what's near you using http://www.radio-locator.com/ and put in your zip code.
02-24-2011 05:10:03 PM
Yup, 3.5 miles away is an A.M. antenna broadcasting during the day. At least it is not interfering with service. Thanks for the links.
WFTD-AM 1080 kHz
"Atlanta's Radio Korea"
Hours of Operation
|Daytime Operation Only|
|Antenna Mode||Directional - 2 Patterns|
|Daytime Power||50,000 Watts|
|Critical Hours Power||30,000 Watts|
Number of Towers