The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2015
Filed:
Jul. 19, 2011
Greg Delforce, Bulimba, AU;
Brendan Horsfield, Rochedale South, AU;
Greg Delforce, Bulimba, AU;
Brendan Horsfield, Rochedale South, AU;
Kaelus Pty Ltd, Queensland, AU;
Abstract
The present invention relates to a device for the location of passive intermodulation faults in a coaxial cable network. The test apparatus () according to one embodiment of the present invention utilizes a pair of high-power, frequency-synthesized, unmodulated RF carriers v(t) () and v(t) () are generated inside the HPA module of the apparatus. The power and frequency of v(t) () and v(t) () can be independently set to a range of values, v(t), v(t) are combined inside the instrument and then applied to the input of the device under test (DUT). The PIM signals () generated in the DUT are combined to produce the primary PIM signal v(t) (). The apparatus also includes two receivers () for the detection of v(t)and v(t) (). These signals are downconverted to 455 kHz. The two 455 kHz waveforms are digitized with a dual- channel A/D converter () and the amplitude ratio and phase offset between the digitized waveforms are calculated and stored.