Search results for query: *

  1. L

    cable lenght from receiver to tv?

    Oops 3db/hundred is the loss at channel 13, it's only 1.5 db/hundred at channel 3 meaning bareback without an amp should work fine at 500 feet hooked directly to his TV.
  2. L

    cable lenght from receiver to tv?

    I'm thinking the output will be at channel 3 or 4. With RG6 having a loss of 3 db/100 feet at those channels a low cost amplifier will be able to overcome the 500 foot loss. Even with no amplifier you should be able to supply a slightly snowy picture after 500 feet of RG6 depending on the launch...
  3. L

    HD-OTA antenna placement

    You might try a couple of temporary attic locations for best signals. I drill a hole in an inch and a quarter antenna mast and hang it from a high point in the attic. All you have to do is use a single nail to hold the pole and use your signal strength readings to choose the best location...
  4. L

    Coax rating for in-wall install?

    From my commercial instalations the only time that higher rated cable is required is if the space that the cable is running in is also an air chamber. What I mean is if your air handling system uses the above the ceiling area to draw air from you need a fire rated cable. This is usually called...
  5. L

    How to amplify signal?

    That's not what you want. It's not made for analog chnl 3 signal really but for the signal between the dish and the receiver. For one thing the chnl 3 or 4 output of the receiver does not have the voltage present that is needed to provide power to this amp. You want a 110 volt powered amp...
  6. L

    How to amplify signal?

    You can buy the 20 db gain model but it probably won't improve the signal quality at your remote locations that are only 50 cable feet away. It does give you some extra sig if for instance at your remote locations you also have a VCR in line before the sat sig reaches the tv. VCRs can have 5 or...
  7. L

    How to amplify signal?

    Something I left out of my DbMv calculations that some may not be aware of is that a very good tv signal level to have at your tv is +3 DbMv. Levels above +3 won't look any better than the +3 DbMv level.
  8. L

    How to amplify signal?

    Your V647 looks to be a +10 DbMv or less modulator. You probably will be feeding a 6 or 8 way splitter which have a 9 or 10 loss. Drop cable (RG59 or RG6 typ)e has less than 1 db of loss in 50 feet. If you add the losses you have about 10 db in loss. Using one of the 10 db amplifiers means that...
  9. L

    Fittings tight or loose on LNBS?

    I think all connections should be tool tight if the female socket is mounted on a metal chassis. This leaves out tv sets and most consumer equipment. In all cases the person doing the tightening should keep an eye on the female port that your are tightening a male connector to. If the chassis...
  10. L

    How to amplify signal?

    I agree with rcbridge. The pictured modulator is the same as the one I referred to. They commonly have 10 db gain. If your 75 ohm switch is near the video input port of your modulator and there is also a video out port on the modulator the switch is probably used to either terminate the...
  11. L

    OTA HD signals

    I think the signal meter measures the quantity of the signal not necesarilly the quality. It's possible the signal has reflections (ghosts). You might go to http://antennaweb.org/aw/welcome.aspx ...and find an analog signal from the same toweras your iffy sig and see if it has ghosts.
  12. L

    How to amplify signal?

    It sounds to me that you are distributing the rf- possibly ch 3 or ch 4 to the other outlets in the house. If you have multiple cables at each outlet possibly you have a return cable that goes back to a common point (or the common point might be right at your main tv location) where it is split...
  13. L

    Diplexing OTA channels to a Dish 921

    If you can pull it off don't use the diplexers but run a dedicated wire frim the OTA to the OTA input on your receiver. There's a huge amount of OTA loss in two diplexers. Only about one eighth of the OTA signal will reach your TV, the other seven-eights will be lost in the diplexers. Close in...
  14. L

    what angle does signal come in from sky to the dish?

    Since it's very near sun outage time when the sun lines up behind all satellites you can use the sun to tell if you have a clear line of sight to the satellites. The first couple of days in October I believe will be the most accurate for this test. If you can see the sun above the trees in the...
  15. L

    RG6 rating question...

    If Dish 1000 uses frequencies above 2.25 GHz you'll find distance limitations with the cable rated to only 2.25 GHz. What I'm saying is if a particular spec says you can only use 200 feet of cable between the dish and receiver using cable that's not rated to your upper limit will mean that it...
  16. L

    Installing dish in a large apartment building

    I think a very important thing is who owns the drop cable (the small diameter cables that go from the mid floor lock box to the residents apartments. If the apartment owns those cables you have a fighting chance as I see it. Then all you need is a simple stacked Dish system where you send the...
  17. L

    RG6 rating question...

    I think what swept means is that a sample of that cable is tested by sending a signal from say 5 Mhz to 3,000 Mhz (3 Ghz) and seeing what the cable's response is. This basically determines if the cable stays at a 75 Ohm impedance over the frequency range and means that the loss versus frequency...
  18. L

    Life Expectancy of UG Antenna Cable

    There's lots of variables here. The soil and moisture content as well as care in avoiding rocks during instalation and back fill and also there's different qualities of underground cables. I'm trying to remember but I think normal interior cable has a polyethelene jacket and foam dielectric, low...
  19. L

    OTA vs Satellite Reception

    I don't think it will change as long as the bulk of consumers value quantity over quality.
  20. L

    OTA vs Satellite Reception

    I think Dish and Direct both deceided that more channels=more customers. Since they have a finite amount of satellite bandwidth the more they digitally compress their transmissions the more channels they can offer. More compression equals less resolution- a less detailed picture. Beta vs VHS...
Top
Back