Radio Transmission Power & Frequency Allocation

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Radio Transmission Power & Frequency Allocation

April 24, 2024
mike@standardsmichigan.com
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Why are there at least 10 publicly funded radio stations receivable in a 75 mile radius (back and forth, up and down) the I-94/I-75 corridor of Michigan — all of them domiciled in public universities?  These stations also receive revenue from other non-profit organizations, unending funding drives and private advertising from multinational financing organizations such as Schwab, Fidelity and other for-profit corporations.   Most of them purchase their “content” from the same source; reflecting the same large government bias seen across the entire nation; concentrated in college towns with spotty intellectual history.

Within an approximate 50 mile radius of the University of Michigan, five national public radio stations are receivable:

WUOM University of Michigan Ann Arbor

WEMU Eastern Michigan University

WDET Wayne State University

WKAR Michigan State University

WGTE University of Toledo

Move 25 miles to the northwest and two more are receivable:

WVGR Michigan Public Radio

WLNZ Landing Community College

Move 25 miles northeast and three more are receivable

WFUM University of Michigan Flint

WMUK Western Michigan University

WAUS Andrews University

FCC ONLINE TABLE OF FREQUENCY ALLOCATIONS: 47 C.F.R. § 2.106
(Revised July 1, 2022)

Standards for radio broadcast coverage can vary depending on factors like location, broadcasting technology, and regulatory requirements. Here’s a general list covering various aspects:

  1. Technical Standards:
    • Transmission Power and Frequency Allocation: Standards set by regulatory bodies like the Federal Communications Commission (FCC) in the United States or Ofcom in the UK regulate the power levels and frequencies allocated to radio stations to prevent interference.
    • Audio Quality: Standards for audio encoding and decoding, such as those defined by organizations like the European Broadcasting Union (EBU) or the Advanced Audio Coding (AAC) standards.
    • Antenna Design and Installation: Standards for antenna design, placement, and maintenance to ensure efficient transmission and coverage.
  2. Content Standards:
    • Language and Content Regulations: Regulations on language, decency, and content suitability enforced by regulatory bodies to ensure broadcasts adhere to community standards and do not contain offensive or harmful material.
    • Advertising Standards: Guidelines on the content and placement of advertisements to prevent deceptive practices and ensure fairness and transparency.
    • Copyright and Licensing: Regulations governing the use of copyrighted material and licensing agreements for broadcasting music, interviews, and other content.
  3. Emergency Broadcast Standards:
    • Emergency Alert Systems (EAS): Standards for implementing emergency alert systems to disseminate important information to the public during emergencies or disasters.
    • Public Safety Communications: Standards for communication protocols and procedures to coordinate with emergency services and agencies during crises.
  4. Accessibility Standards:
    • Closed Captioning: Standards for providing closed captioning for the hearing impaired, ensuring accessibility to radio broadcasts.
    • Descriptive Video Service (DVS): Standards for providing audio descriptions of visual content for the visually impaired.
  5. Ethical Standards:
    • Journalistic Integrity: Guidelines for ethical reporting and journalism standards, including accuracy, fairness, and impartiality.
    • Disclosure of Sponsored Content: Standards for disclosing sponsored or paid content to maintain transparency and trust with the audience.
    • Conflict of Interest Policies: Standards for identifying and managing conflicts of interest in news reporting and programming.
  6. Health and Safety Standards:
    • Electromagnetic Radiation Exposure Limits: Standards set by health organizations and regulatory bodies to limit human exposure to electromagnetic radiation emitted by radio transmitters.
    • Workplace Safety: Standards for ensuring the safety of radio station personnel and compliance with occupational health and safety regulations.

These standards are often enforced by governmental regulatory agencies, industry organizations, and professional associations to ensure the quality, integrity, and safety of radio broadcast coverage.

Radio 300

Radio 400

Voice Communications Devices for Use by Emergency Services

April 24, 2024
mike@standardsmichigan.com
No Comments

The frequency differences between public safety radio and public broadcasting radio are mainly due to their distinct purposes and requirements.

  • Public safety radio operates on VHF and UHF bands for emergency services communication These radio systems are designed for robustness, reliability, and coverage over a specific geographic area. They prioritize clarity and reliability of communication over long distances and in challenging environments. Encryption may also be employed for secure communication.
  • Public broadcasting radio operates on FM and AM bands for disseminating news, entertainment, and cultural content to the general public.  These radio stations focus on providing a wide range of content, including news, talk shows, music, and cultural programming. They often cover broad geographic areas and aim for high-quality audio transmission for listener enjoyment. Unlike public safety radio, public broadcasting radio stations typically do not require encryption and prioritize accessibility to the general public.

Standard on Fire and Emergency Service Use of Thermal Imagers, Two-Way Portable RF Voice Communication Devices, Ground Ladders, and Fire Hose, and Fire Hose Appliances

NFPA 1930 is in a custom cycle due to the Emergency Response and Responder Safety Document Consolidation Plan (consolidation plan) as approved by the NFPA Standards Council.  As part of the consolidation plan, NFPA 1930 is combining Standards NFPA 1801, NFPA 1802, NFPA 1932, NFPA 1937, and NFPA 1962.

Firefighter radio communication faces several special technical challenges due to the nature of the environment they operate in and the criticality of their tasks. Here are some of the key challenges:

  1. Interference and Signal Degradation: Buildings, debris, and firefighting equipment can obstruct radio signals, leading to interference and degradation of communication quality.
  2. Multipath Propagation: Radio signals can bounce off surfaces within buildings, causing multipath propagation, which results in signal fading and distortion.
  3. Limited Bandwidth: Firefighter radio systems often operate on limited bandwidths, which can restrict the amount of data that can be transmitted simultaneously, impacting the clarity and reliability of communication.
  4. Noise: The high noise levels present in firefighting environments, including sirens, machinery, and fire itself, can interfere with radio communication, making it difficult for firefighters to hear and understand each other.
  5. Line-of-Sight Limitations: Radio signals typically require a clear line of sight between the transmitter and receiver. However, in complex urban environments or within buildings, obstructions such as walls and floors can obstruct the line of sight, affecting signal strength and reliability.
  6. Equipment Durability: Firefighter radio equipment needs to withstand harsh environmental conditions, including high temperatures, smoke, water, and physical impacts. Ensuring the durability and reliability of equipment in such conditions is a significant challenge.
  7. Battery Life: Prolonged operations in emergency situations can drain radio batteries quickly. Firefighters need reliable battery life to ensure continuous communication throughout their mission.
  8. Interoperability: Different emergency response agencies may use different radio systems and frequencies, leading to interoperability issues. Ensuring seamless communication between various agencies involved in firefighting operations is crucial for effective coordination and response.
  9. Priority Access: During large-scale emergencies, such as natural disasters or terrorist attacks, communication networks may become congested, limiting access for emergency responders. Firefighters need priority access to communication networks to ensure they can effectively coordinate their efforts.
  10. Training and Familiarity: Operating radio equipment effectively under stress requires training and familiarity. Firefighters must be trained to use radio equipment efficiently and effectively, even in challenging conditions, to ensure clear and concise communication during emergencies.

National Institute of Standards & Technology

Testing of Portable Radios in a Fire Fighting Environment

Solar

April 23, 2024
mike@standardsmichigan.com

No Comments

Sie strahlt vor Freude über ihre Auszeichnung – TH-Alumna Melanie Klaus. Für ihre Bachelorarbeit im Bereich Erneuerbare Energien wurde sie vom Solarenergieförderverein Bayern geehrt. In ihrer Bachelorarbeit im Studiengang Elektro- und Informationstechnik untersuchte sie das Zusammenspiel von Wind- und Solarenergie und den Nutzen, der sich hieraus für die regenerative Energieerzeugung erzielen lässt. Untersucht wurde also die Nutzung der natürlichen Kombination von Wind und Sonne für die Energieerzeugung. Um die Rentabilität dieser Einspeisekombination zu ermitteln, hat Melanie Klaus ein Software-Tool entwickelt, welches zur Planung und Simulation abgestimmter Photovoltaik-Wind-Kombinationen dient und bereits für die Errichtung einer Photovoltaik-Anlage zu einem Windpark eingesetzt wird.

Starting 2023 we break away the topic of solar energy standards from our standing Electrical and Energy colloquia.   We start with the following titles

IEC TC 82 Solar photovoltaic energy systems

Underwriters Laboratories 1703 PV Module Certification

ASTM E772 Standard Terminology of Solar Energy Conversion

IEEE 1562 Guide for Array and Battery Sizing in Stand-Alone Photovoltaic Systems

NEMA Solar Photovoltaic Council

NECA 412 Standard for Installing and Maintaining Photovoltaic Power Systems

NFPA 70 Articles 690-691

NFPA 70 Articles 705 & 855

International Code Council Section 1607 Photovoltaic panels or modules

ASHRAE International: 90.1 Building Energy Code & 189.1 Green Energy Code

Time permitting: Example design specification and construction contract.

"Education is simply the soul of a society as it passes from one generation to another" - G.K. Chesterton

Other standards developers and publishers are also present in this domain but this list is where we will start given that we only have an hour.   Join us today at 16:00 with the login credentials at the upper right of our home page.

Readings:

What are the hidden costs of solar panels?

Do We Have Enough Silver, Copper, And Other Materials To Keep Up With The Growth Of Solar?

Mining Raw Materials for Solar Panels: Problems and Solutions

Grid-Connected Microgrid Battery Energy Storage Systems

Solarvoltaic PV Systems

April 23, 2024
mike@standardsmichigan.com

No Comments

“Icarus” Joos de Momper

National Electrical Code Articles 690 and 691 provide electrical installation requirements for Owner solarvoltaic PV systems that fall under local electrical safety regulations.  Access to the 2023 Edition is linked below;

2023 National Electrical Code

Insight into the technical problems managed in the 2023 edition can be seen in the developmental transcripts linked below:

Panel 4  Public Input Report (869 pages)

Panel 4  Second Draft Comment Report (199 pages)

The IEEE Joint IAS/PES (Industrial Applications Society & Power and Energy Society) has one vote on this 21-member committee; the only pure “User-Interest” we describe in our ABOUT.  All other voting representatives on this committee represent market incumbents or are proxies for market incumbents; also described in our ABOUT.

The 2026 National Electrical Code has entered its revision cycle.  Public input is due September 7th.

We maintain these articles, and all other articles related to “renewable” energy, on the standing agenda of our Power and Solar colloquia which anyone may join with the login credentials at the upper right of our home page.   We work close coupled with the IEEE Education & Healthcare Facilities Committee which meets 4 times monthly in American and European time zones; also open to everyone.

 

 

 

 

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