cm3020prob said:In the case of Montreal, CBS (22) is next to CBC (21), NBC (14) is next to Global (15), which I get no reception during the day. Fox (43) operates at a lower power than CBS and NBC so it can be difficult sometimes, ABC (13) is next to CTV (12) but it's at very low power, as in, forget it. But I get PBS-57 (38) and PBS-33 (32) without any problem as they have no co-adjacent channel problem.
Assuming that they are both DTV stations, the ATSC standard has dramatically reduced ACI (Adjacent Channel Interference) from the bad old days. The best proof of this I can think of is in Seattle where KOMO on 38 and KIRO on 39 have side-by-side towers pumping out about a megawatt each.cm3020prob said:If the american RF signal is far but strong enough, placing their transmitter on a RF channel next to the american one will make it difficult to receive.