Insertion loss is only the first part of the story. Don Quijano really asked an very important question in the comment. Is that 30 dbmv the high end or the low end frequency of the channel. Technically speaking, it's technically dbmv. not dB. Reason for that term is that 0 dbmv is actually 1mv and 60 dbmv is 1 volt in the system. The farther end you go down the line the steeper the 'frequency tilt' will be. Taps and splitter will pull off the amount of insertion loss, off top. It's really marginal depending on frequency. When you get to the end of the line, you will see a 'reverse tilt'. Which means the lower frequency has more power than the high frequency. We're not even discussing returns on this video.
are you still around, the website on the vid didn't bring me anywhere. SO you mentioned you check signal strength with a meter, where do I get one of these?
Oh ... A correction .... After veiwing other instructional videos on tap systems. It appears that taps only come in certain standard sizes, and there are no exactly "17 db" ones available. So you have to use the closest standard one which is "16 db." So in the video while the 16 db tap is actually correct, the power level to the TV should be "7 db" at that point and not "6 db."
