Patent ID: 8001579

Claim:
A downstream bandwidth output level and/or output level tilt compensation device that can be inserted into a signal transmission line of a CATV system on a premise of a user, the device comprising: a tuner configured to scan a downstream bandwidth to identify a low band signal channel and a high band signal channel; a channel analyzer configured to determine a format of each of the low band channel and the high band channel; a signal measurement device configured to measure a low band signal strength of the low band channel and a high band signal strength of the high band channel; an offset circuit configured to perform at least two of (i) add an offset value to the low band signal strength when the low band channel is a digital format, (ii) subtract an offset value from the low band signal strength when the low band channel is an analog format, (iii) add an offset value to the high band signal strength when the high band channel is the digital format, and (iv) subtract a gain offset value from the high band signal strength when the high band channel is the analog format; a microprocessor configured to compare the low band signal strength and the high band signal strength, including any offset values, to a predetermined signal strength loss curve; a variable output level compensation device; and a variable slope adjusting circuit.