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In Reply to: RE: FM Reception posted by jcmusic on March 29, 2008 at 16:37:31
Other questions:
How far away and what are the transmitting power of the stations at issue? Past a certain distance, the station will be a problematic capture, period. Check the signal maps for your stations.
What is the array type and size? Where is the antenna mounted - both direction, height to horizon and nearness to other structures? If the array cannot make good capture, the rest is irrelevant. You must correct the array deficiency, or consider the station beyond fringe for your location.
How long is the down lead run, what is its composition (RG-59, 6, QS6 or 11), where is it running, and what other insertion losses, if any, are there? Lots of taps, splices and splitters will drastically increase loss rates. 300 ohm cable has superior loss rates, but is typically unshielded from local interference.
If you are getting sufficient signal strength off the array, then you either have excessive distribution losses, or a tuner deficiency. If the former, you need to audit the distribution chain. Better quality cabling will reduce loss rates over longer runs. On a single receiver distribution, amplification is rarely necessary. On larger distribution networks, amplification near the array may be needed to over come the losses. There is a significant performance difference between commercial and consumer grade distribution components. But if sufficient signal strength is reaching the tuner, you need to correct the tuner.
Good luck!
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