76.605(a)(5)(i)

Fact


(5) The visual signal level on each channel, as measured at the end of a 30 meter cable drop that is connected to the subscriber tap, shall not vary more than 8 decibels within any six-month interval which must include four tests performed in six-hour increments during a 24-hour period in July or August and during a 24-hour period in January or February, and shall be maintained within:

(i) 3 decibels (dB) of the visual signal level of any visual carrier within a 6 MHz nominal frequency separation.

Myths


"I measure more than 3dB of level difference between 2 and 76 etc...."

The minimum/maximum bandwidth visual carrier levels are discussed in 76.605(a)(5)( ii ). What they are talking about here are channels immediately above and below the channel under measurement. Channel 6 and 98 are not adjacent either.

Measurements

There are several types of meters on the market today to make these types of
measurements. 76.609(a)provides some suggestions on how to perform
other tests and 76.601(a)(1)provides test point and data collection information.

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