Signal Leakage Archives |

Signal Leakage

By Ron Hranac – The metric of interest for leakage is its field strength in microvolts per meter (not just microvolts), which is typically measured with a dedicated signal leakage detector. The value of keeping the plant tight helps to avoid harmful interference to over-the-air users. An effective leakage monitoring and repair program also helps to reduce ingress problems, and ensures better network performance.

FCC Proof-of-Performance Rules Revisited

By H. Mark Bowers — Revisions to FCC Part 76 Rules were released in April of this year. Significant changes were included in this release, including the rewording of some test procedures and standards, QAM carrier limits for aeronautical frequency notification.

Basic HFC AC Design (Part Two)

By H. Mark Bowers — Preparation for AC design calculations requires a diagram of all amplifiers (system actives) in a tree-branch configuration as was shown in Part One of this series

Basic HFC AC Design (Part One)

By H. Mark Bowers — Many technicians struggle with AC design, particularly in the area of proper power supply placement and loading. AC design involves concepts and principles that we don’t use in every day system maintenance or operation.

Signal Leakage Patrolling at 700 MHz (Part Two)

By H. Mark Bowers — I believe this exercise raises the issue of how one is to perform accurate field strength measurements at higher LTE frequencies, where there is a low-level leak from the HFC plant (especially QAM).

Signal Leakage Patrolling at 700 MHz (PART ONE)

By H. Mark Bowers – Newer leakage detection systems are now available that measure at dual frequencies. While {the} present FCC required leakage detection frequency range remains in the 108 MHz to 137 MHz aeronautical band, measurements at higher frequencies can be revealing and may eventually be required