Patent ID: 9491027
Filing Date: 2016-11-08
CPC Classification: G01R,H04B,H04L,H04W

Claim Text:
1. A test instrument or marker signal injection tool for detecting a shielding flaw in a broadband communication system (BCS), said test instrument or marker signal injection tool comprising a carrier signal generator, a selectively controllable modulation signal generator that develops a signal which is variable in frequency and amplitude to avoid interference with a payload signal, if present, or to cause marker signal egress from otherwise undetectable shielding defects if no payload signal is present or of interest, a modulator for modulating a signal produced by said carrier signal generator with a signal produced by said selectively controllable modulation signal generator, whereby said modulator produces a dual sideband signal as a marker signal having a modulation pattern with at least two degrees of freedom, and a connection for injecting an output of said modulator into a limited portion of a BCS.