A measurement device is provided for measuring an upstream bandwidth. The measurement device includes a return path extending at least a portion of a distance between a supplier side connector and a user side connector. A coupler is connected within the return path, the coupler providing a secondary path. A detection circuit is connected electrically downstream the coupler. A level detector is connected electrically downstream the detection circuit, and a microprocessor is connected electrically downstream the level detector. The microprocessor includes a first buffer and a second buffer.