Description
Easily find & fix the smallest, hardest to find sources of ingress into your plant
- Dual-Band Leakage Receiver for Both Aeronautical and LTE Frequencies
- Sensitivity Up to 0.1 uV/m at 138 MHz and 0.4 uV/m at 757.5 MHz
- Tagged Signal Source Combined with a Discriminating Leakage Receiver
- Audible Tone Increases Proportionally in Pitch as Technician Moves Closer to the Source of Leakage
Overview
Mitigation of signal leakage within the subscriber premise is essential for the successful operation of the subscriber’s cable and cellular services. To thoroughly evaluate the potential for interference to subscriber services, Trilithic has developed a patent pending approach to signal leakage measurement which will comprehensively test the Aeronautical and LTE bands in both fully digital and analog cable systems.
Historically, signal leakage detectors have required high levels of sensitivity to measure signal leakage radiating from the CATV system. Measurement within the subscriber premise and the migration to all digital services places even greater sensitivity requirements upon the leakage detector combined with a new requirement to simultaneously monitor for signal leakage in both the aeronautical and LTE bands.
In laboratory experiments signal leakage measurements as low as 0.1 uV/m have proven sufficient to allow LTE signals to enter the subscriber network and disrupt cable services. Achieving a measurement sensitivity of 0.1 uV/m is beyond the measurement range of conventional signal leakage detectors and requires a new approach to leakage detection within the subscriber premise.
Testing Approach
To meet the new measurement and sensitivity requirements, the Seeker Home monitors 138 MHz and 757.5 MHz simultaneously, supporting testing in both the Aeronautical and LTE frequency bands. The Seeker Home Signal Source replaces the Cable service with two high output test carriers which pressurize the subscriber cabling revealing any damage which may lead to service interruption from ingressing LTE carriers.
The Seeker Home Signal Source has two output levels. A +60 dBmV for home certification and a +40 dBmV output level should the subscriber network prove too porous for pinpointing the location of a leak at the higher transmit level.
The displayed leakage levels are normalized by the Seeker Home receiver to reflect the value of the leak at nominal systems levels within the subscriber premise. The normalization of the measured and displayed leakage levels simplifies the evaluation of leakage severity and provides consistency for documentation of leakage levels in accordance with established industry practices.
When utilizing the higher +60 dBmV transmit level the Seeker Home is able to locate signal leakage down to a normalized leakage level of .1 uV/m with a single flexible antenna; making it possible to locate and repair signal leakage levels far beyond the measurement range of conventional leakage detectors.
