Michael Coslo wrote:

I don't know exactly how it's done now, but when I worked in the Cable
industry many moons ago, we had a lot of adjustment we could make. Even
more, we had variable by frequency attenuators so we could ensure that a
flat signal showed up.


Those are 'Equalizers' and used to cancel the cable losses. There is
some adjustment in the trunk amplifiers, but some brands just used a
plug in equalizer marked with the rolloff in dB while others had both.
The coarse plugin, and a variable equalizer to level the trunkline for
'Proof of Performance' tests.


--
You can't have a sense of humor, if you have no sense.