Question about Panasonic PT-56DLX25 56" HDTV

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Pixalationwhen jiggling the antenna coax

I am getting pixaltion on certain channels. Seems to go away for 40 min or so when I replug the antenna into the coax antenna jack. Gets worse if I jiggle the coax. Is it the coax or the post that it plugs into? Plugged same antenna coax in another tv and no problems.

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I would say you found the issue. Does it feel like a better fit on the other tv as well?

Posted on Apr 24, 2013

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Hi my tv keeps going pixulated and losing signal. it is connected to an outside aerial using coax. i have done a factory reset, the problem persists. what should i do now?


how do other input sources work?(ie. DVD, VCR) if they are OK, the next thing is to double check your antenna & all connections to & from it, also the direction of the antenna. Also, remember that the location of said antenna is important, is it crowded by foliage, has new building sprouted around you, does it do it on all the channels. Usually this problem is from a source other than the TV.

As a last resort you might replace the tuner, but I would be looking very closely at some of these other issues.

Mar 04, 2015 | Sony BRAVIA KDL-40S2000 40 in. LCD HDTV

1 Answer

I have a cobra 25 ltd classic with firestik ngp antenna , using swr meter I cannot get a match.


Make sure you have a good ground on the antenna and radio.
Check the SWR at Ch 1, Channel 20 and channel 40.
Does the SWR reflected power improve as you go up in channels or get worse.
If it gets better, the antenna is too short, if it gets worse the antenna is too long.
Also when you say a match, are you trying to get 1.1 to 1?
This may not always be possible depending on the antenna. Anything 1.5 to 1 or lower would be acceptable.
And again check your grounding, most Radio and RF issues are a result of poor grounding and poor antenna positioning and poor groundplane for the antenna.

Good luck

Oct 16, 2014 | Radio Communications

1 Answer

Low pwr on xmit,weak rec,swr alert lite on xmit swr 1:4-1 on ch 20


you have no power because your radio is not tuned to your antenna.You get a new radio and put junky coax and a decent antenna and you expect it to work right. Get 75 ft of rg-213 and you will see a change.

Jan 08, 2013 | Galaxy Radios DX-2547 40-Channels Base CB...

1 Answer

On my connex 4600 turbo cb radio i keyed the mic up to say something and the meter light and the channel number got dim and sort of flickered and distored, also the needle in the meter didnt swing at all...


I would think it was most likely a minor short in your mic, maybe dirt or moisture. If the short was in the back of the jack, it would most likely do it all the time. Same thing for your coax, if it was pinched in the door, I would think you would have reception/feedback issues even without keying the mic....the same antenna/coax is used for send and recieve.

IF it does it again, try switching in another mic and see if it goes away.

Hope this is helpful.

Sep 15, 2011 | Audio Players & Recorders

1 Answer

Having trouble setting swr .moved anttena up and down 1/4 inch at a time and there is no change


There are several things that can cause you not to be able to get an acceptable SWR.

The first is the most obvious. Poor antenna, or bad coax. Make sure your coax is good. Make sure the antenna is mounted in a good location.

Some things I have seen that cause this problem.

  • Wilson Little wil, almost impossible to get under a 1.6 SWR.
  • Fiberglass antenna's, a break in the wire near the top of the antenna. Will show the antenna as being too short, and adjusting the top will do nothing. This antenna is no good.
  • Common mode current. This is when the RF is traveling back down the outside of the coax, and or causes the coax to act like part of the antenna. SOLUTION. As close to the antenna as you can, take 6 to 8 inches of coax, and coil it into a tight coil, about the diameter of a spray paint can. In fact using a spray can to wrap the coax around works well. Use electrical tape to secure the coil so that it will stay tight and uniform. This will stop common mode.
  • missing foil/vinyl membrane on bottom of magmount antenna. This is essential for the antenna to see ground plane.
  • bad connections on coax connector.
  • Cracked isolator on stud mount.
  • incorrect procedure for taking SWR reading.
  • Poor location of antenna. E.g. antenna's load not above roof of vehicle.
  • Incorrect length whip being used.
  • corrosion of any part of the antenna system.
There are some cheap antenna's out there that you just can't get lower then say a 1.5 or worse, like the wilson little wil. Wilson makes great antenna's. The 500, 1000 and 5000, as well as their silver load antenna's are excellent. I have been able to get them all to at least a 1.1 SWR, and some like the 5000, and silver load fiberglass whip to 1.0 using an analyzer. The Little will is just a poor antenna. Anything under 2.0 SWR is okay of a barefoot radio, although I don't like going over 1.5 my self. A barefoot radio, will do a 2 swr all day. If the radio is stock, and not peaked and tuned, 2 swr is fine and won't hurt the radio.

You should always try to get the lowest SWR that you can in any case. The lower the SWR, the more RF energy is leaving the antenna. As well, receive will improve the closer you get to a perfect match. This is known as being "On Que".

Check everything I have listed that applies. And if nothing fixes it, you may want to try a different antenna. Some antenna's just don't work well on certain vehicles.

Oct 13, 2010 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Coax length


the shorter the better between radio and linear, all coax has to run in 3 ft, 18 foot is recommended for all antennas.

Mar 03, 2010 | Galaxy Radios DX-44V 40-Channels Base CB...

2 Answers

Can't get anything over antenna


Did you use an inside or outdoor antenna? An outdoor antenna rotated in the correct direction will give you the best chance of getting any signal. Look at antennaweb.org and tvfool.com for the channels in your area, the direction in which the antenna must be pointed and the type of antenna you will need to get them. Antennaweb.org is very conservative in the channel listings even with the assumption of an external antenna. Do you have hills, trees or tall buildings between you and the various transmitters? That will block your signal strength - remember digital TV is an all-or-nothing signal.

I hope this helps.

Cindy Wells
(antennaweb indicates that my location will only get 2 channels from a transmitter 10 miles away. With a properly oriented outdoor antenna and an splitter/amplifier, I actually get those + 3 from 30 miles away on several TVs without signal loss..)

Jan 04, 2010 | Dynex DX-L42-10A 42 in. LCD TV

1 Answer

Can't get digital channels on 37


Bob,

Are you certain you've connectet the antenna coaxial cable correctly?

There's 2 of them on this TV, one for digital and one for analog/cable connections, make sure you're connected to the correct input for digital TV.

If you're certain you've got it connected correctly then your problem is going to most likely be in the TV tuner board inside the TV.

Good Luck!

Ren

Jun 03, 2009 | Akai LCT3701AD 37 in. LCD Television

1 Answer

Reception/ jacks on the back of a SHARP L32 - X200 Cinema select


go to VCR, OR DVD player. Use channel selection there.

Dec 07, 2008 | Sharp 32L-X2000 32" TV

1 Answer

Limited cb radio range on Kenworh t800 truck


I recall problems grounding the antenna on those kw's. May want to try a no ground antenna. Also the stock coax that comes with the truck sometimes gets broken or pinched. Go to a good shop, replace the cheap coax and grount the antennas.

Nov 26, 2008 | Cobra 25 LTD 40-Channels Base CB Radio

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