On Fri, Apr 4, 2008 at 8:03 AM, Andy Walls <[EMAIL PROTECTED]> wrote: > If you suspect you have signal strength or SNR problems, some steps you > could take, if you haven't already, are:
When you do not have the samsung tuners on the PVR-500 this very likely the problem. Hans said the following in [1] which describes the same symptoms. > There are two possible causes: first of all the Samsung tuners are > simply not very good, and secondly the PVR-500 needs a stronger signal > than the PVR-250 (it splits the signal internally to both tuners, so > this reduces the signal strength). In this case it sounds that an > antenna amplifier will help. However, if there are some channels that > work and others that do not (and often show a sort of herringbone > effect), then there isn't a lot that can be done as that is a > limitation of the Samsung tuner. But from the description of your > problem I'd say that you need an amplifier. [1] http://www.gossamer-threads.com/lists/ivtv/users/37601#37601 Greets Sander PS: Can we post the below to the wiki? > 1. Ensure you are using 75 ohm splitters that cover your desired > frequency range (55 - 802 MHz for US NTSC broadcast IIRC). > > 2, Ensure that all unused cable runs, wall jacks, or splitter outputs > are properly terminated in a 75 ohm load. > > 3. Replace RG-58/U cables with RG-6/U cables. RG-6/U has about 3 dB > less loss per 100 feet at 400 MHz than RG-58/U according to one > manufacturer. > > 4. Add a broadband TV amplifier as close as you can to where the signal > comes into your location, ideally before any splitters or long cable > runs. If you don't also use your cables to receive FM radio signals > and the amplifier has an FM trap, set the FM trap to "IN" to reduce > intermodulation products induced in the tuner by the FM broadcasts in > the 88-108 MHz band. > > 5. Make sure you have an in-line lightning protection/grounding unit > installed in the cable close to where the signal comes into your > location. Grounding the shield of the coax protects your gear from > electrical transients induced by nearby lightning, and it happened to > greatly improve the signal quality in my home. _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
