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Old 12-07-2016, 10:36 AM
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DavGoodlin DavGoodlin is offline
Motorola Minion
Join Date: Aug 2011
Location: near Strasburg PA
Posts: 2,868
LTE - ATSC interference

The 4G cell transmissions are often within the upper UHF-TV band (above channel 51) and seem to be causing DTV dropouts on ATSC tuners without adequate image rejection and adequate band pass filters. there is a white paper here

Most antennas and amps are designed to pass the old UHF band, up to channel 83 at 890 mHz. Channel Master and others are selling an inline low-pass filter that supposedly reduces this problem.

A new line of outdoor preamps from Solid Signal has this filter built-in. I have ordered one that takes up to 3 inputs, for antennas aimed in different directions. It seems the older mast-mount preamp designs from CM and Winegard's AP-8800 have all been discontinued.
"When resistors increase in value, they're worthless"
-Dave G

Last edited by DavGoodlin; 12-07-2016 at 03:15 PM. Reason: CM 7777 still available
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