What adjustment is made to analog TV channels to maintain equal power in a mixed modulation network?

The correct answer emphasizes that in a mixed modulation network, where both analog and digital channels coexist, it is crucial to ensure that the analog channels transmit at a higher amplitude level. This is necessary to ensure that the analog signal maintains an adequate quality and visibility to the viewer when juxtaposed with the often superior quality of digital signals.

When digital channels are present, they typically transmit with efficiency and better signal integrity compared to their analog counterparts. If the analog channels were not adjusted to have higher amplitude levels, they could struggle to achieve the same perceived strength, leading to issues like poor picture quality or inadequate coverage.

Adjusting the analog channels to a higher amplitude compensates for this disparity, allowing them to maintain equal power relative to the digital channels. This adjustment is crucial to ensure the audience receives a consistent quality of service across both types of channels within the same network environment.