Friday, November 8, 2013

FCC says Fluorescent Lighting Jamming Cellphone site

It doesn’t happen very often but the FCC has issued an official Citation and Order for violation of Section 15.5(b) of the Commission’s regulations governing what are called Incidental Radiators. In this case the recipient is Ronald Bethany doing business as Perfect Cuts Salon in San Antonio, Texas, who is being cited for operating incidental radiators and causing harmful interference to a cellular telephone system.
This past July 24th the FCC’s Houston Office used direction finding techniques to locate the source of an unknown transmissions on 705 MHz to the Perfect Cuts Salon. The agent confirmed that the interfering signal was coming from the overhead fluorescent lighting in the salon.

The agent then interviewed Bethany who is the owner of the salon. He reportedly stated that representatives of AT&T had conducted on and off testing of the lighting in the salon and confirmed that the interior fluorescent fixtures were the source of interference to a cell site located next door. Bethany further stated that he had unsuccessfully asked General Electric, the manufacturer of the fluorescent lighting, to replace the lighting.

The FCC says that Bethany would not cooperate, so the agent from the Houston Office was unable to conduct his own on/off testing of the lighting in the salon. The agent verbally warned Bethany that he must repair or replace the lighting fixtures to resolve the interference.

On July 31, the agent spoke by telephone with Bethany, who stated that the lighting was not causing him any problems and that he saw no reason to repair or replace them unless he was paid to do so. The agent reiterated to Bethany that he must resolve the interference or be in violation of the FCC’s rules. As of the October 25th release date of the Citation AT&T continues to report receiving interference at its cell site next door to Mr. Bethany’s salon.

Now, based on the evidence it has on hand the FCC has found that Ronald Bethany is in violation Of Section 15.5(b) of its Rules by operating incidental radiators and causing harmful interference. It has directed him to cease operation of the incidental radiators immediately. Or in simpler terms, it basically told him to turn off the lights until the interference can be resolved. 


source; Skeeter Nash, N5ASH

My Stamp Collecting Blog

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HOW TO READ PROPAGATION NUMBERS

The A index [ LOW is GOOD ]

  • 1 to 6 is BEST
  • 7 to 9 is OK
  • 11 or more is BAD

Represents the overall geomagnetic condition of the ionosphere ("Ap" if averaged from the Kp-Index) (an average of the eight 3-hour K-Indices) ('A' referring to amplitude) over a given 24 hour period, ranging (linearly) typically from 1-100 but theoretically up to 400.

A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.

SFI index [ HIGH is GOOD ]

  • 70 NOT GOOD
  • 80 GOOD
  • 90 BETTER
  • 100+ BEST

The measure of total radio emissions from the sun at 10.7cm (2800 MHz), on a scale of 60 (no sunspots) to 300, generally corresponding to the sunspot level, but being too low in energy to cause ionization, not related to the ionization level of the Ionosphere.

Higher Solar Flux generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; Solar Flux rarely affects the 30, 40, 60, 80, & 160 Meter Bands.

K index [ LOW is GOOD ]

  • 0 or 1 is BEST
  • 2 is OK
  • 3 or more is BAD
  • 5 is VERY VERY BAD

The overall geomagnetic condition of the ionosphere ("Kp" if averaged over the planet) over the past 3 hours, measured by 13 magnetometers between 46 & 63 degrees of latitude, and ranging quasi-logarithmically from 0-9. Designed to detect solar particle radiation by its magnetic effect. A higher K-index generally means worse HF conditions.

A lower K-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Kp-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.

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