SIGNAL STRENGTH

This is the strength of the receiving signal for time calibration! The 3 sectors are to measure the strength of signal! 3 is max strength and 0 is no strength!

The red circle is the strength of the receiving signal for time calibration! The 3 sectors are to measure the strength of signal! 3 is max strength and 0 is no strength!

Try checking the signal strength then run the scan again.
Checking the DTV signal strength
You can check the DTV signal strength to determine if you need to adjust your antenna or digital cable input. The higher the signal strength, the less likely you are to experience picture degradation.To check the DTV signal strength:
1.Press MENU. The on-screen menu opens.

2.Press < or > to highlight Channel, then press v. The Channel menu opens. The DTV signal strength is shown at the bottom of the menu.

3.Press EXIT to close the menu.

The connections bad.... try rewiring the one for signal 2 or if its making a good connection... look for a weak spot in wire... that helped me when i couldn't figure out wiring

80% is a good signal strength....but if you want to increase the signal strength, then you need to move the wireless router to a very ventilated area, also the router should be placed atleast 5 feet away from other electronic devices like, modem, ups, microwave ovens,refrigerators etc.... also there should be a line of sight between the router and the wi-fi adapter... but in order to connect to a wireless network 25% of signal strength is enough....

The receive indicator tells you the strength of the signal when the timing signal was transmitted, (this occurs only during the night).

The strength of the signal dictates how much of the indicator is shown i.e. full strength, full picture, half strength, half picture, no picture, no signal.

Signal strength seems to vary with location (how far you are from the transmitter), so perhaps you are in a poor reception area.

could be one of a few things,
low signal strength, aerial out of line with transmitter.
bad coax connections losing signal strength.
coax broken inside, or old and not low loss.
Get the aerial checked for direction, half a degree out of line over a few miles and you will lose a lot of signal strength, as will old coax (aerial cable) and if you are using an unshielded coax you could be losing signal strength through the cable itself. Replace the connecters and try to use a straight run of cable instead of having joins in it as these joins, even if using connecters, will cause a weak signal. If yiu are running more than one tv off your aerial, invest in a booster.

How is the signal strength? Check and make sure the antennas are not loose. Is your house the old style concrete? Sometimes thick block or concrete walls are tough for the wireless signal to get through. They do make larger antennas or signal boosters for wireless routers. You may need to install one of these to boost signal strength. Also is it wireless B,G,or N? Wireless B has a very weak signal while wireless N has a very strong signal. Sometimes the router settings can be changed to adjust the signal strength and may be set too low also.

signal is bouncing off doors and walls to get to your comp
move comp closer to modem if it increases and your signal strength increases then you know youll have to be close to modem

other problem someone taped your signal and it working off of it call your provider to come out test the wireless signal strength and or password your wireless router settings so some one cant interfere with signal

i dont like wireless myself in the home i go straight cable with ether net cord this always has strenght and cannot be tapped

have a go at changing the wireless channel within your router there may be some interfearence generated by your pc that is affecting its signal strength