radio communications l.
Skip this Video
Loading SlideShow in 5 Seconds..
Radio Communications PowerPoint Presentation
Download Presentation
Radio Communications

Loading in 2 Seconds...

play fullscreen
1 / 35

Radio Communications - PowerPoint PPT Presentation

  • Uploaded on

BLM. COLORADO. Radio Communications. Basic Course. Course Objectives. Radio Theory Terrain Effects Antenna Design Narrowband. Course Objectives. Infrastructure Common Phrases Procedures for Repair Emergencies Familiarization. BE SAFE!. Prepare For Your Trip.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Radio Communications' - richard_edik

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
radio communications



Radio Communications

Basic Course

course objectives
Course Objectives
  • Radio Theory
  • Terrain Effects
  • Antenna Design
  • Narrowband
course objectives3
Course Objectives
  • Infrastructure
  • Common Phrases
  • Procedures for Repair
  • Emergencies
  • Familiarization
prepare for your trip
Prepare For Your Trip
  • Follow Office Specific Check In/Out Procedures.
  • Visually inspect and check your equipment for proper operation before leaving for the field.
  • Do a radio check.
know your options
Know Your Options
  • Know what sites cover your intended work/travel.
  • What is their operational status?
  • Alternative forms of communications.
radio theory
Radio Theory
  • Radio waves are generated by a rapidly oscillating electric current.
  • Frequency is the amount of cycles a radio wave makes referenced to one second of time.
  • Wave length is the distance the wave travels to complete one cycle.
radio and light waves
Radio and Light Waves
  • Radio Waves are Electromagnetic Energy.
  • Light Waves are Electromagnetic Energy.

Similar Properties

  • Radio waves travel in much the same way as light.
  • Imagine a light bulb on top of your handheld or vehicle.
  • The energy is similarly

sent in all directions.

more similarities
More Similarities
  • Reflected
  • Absorbed
  • Diffracted
  • Dispersed
handhelds and mobiles perform differently
Handhelds and Mobiles Perform Differently
  • Handhelds Transmit with less power utilizing a small battery source.
  • Mobiles utilize a gain antenna which effectively doubles the transmit power and receive sensitivity.
  • Handheld antennas tend to be more obstructed.
batteries are critical
Batteries are Critical
  • Proper care of batteries is essential.
  • Batteries are a users responsibility.
  • Typically last for 8 hours before charging.
  • Radio will not transmit effectively.
things to remember
Things to Remember
  • Height is more advantageous than power.
  • Know the location of the site you are trying to transmit to and what objects or terrain are in the path.
  • A small shift in position can make a big difference in signal quality.
how far can you communicate
How Far Can You Communicate
  • Typically BLM handhelds can communicate within a few miles of each other.
  • Typically a BLM vehicle radio to a BLM mountaintop radio can communicate about 40 miles apart.
  • Typically BLM mountaintop radios can communicate about 100 miles apart.
  • Narrowband radios are mandated for BLM use.
  • Radios programmed incorrectly will sound distorted.
base station
Base Station
  • A means for dispatch to communicate to users over a large area in the field.
  • Radio is installed for optimum performance.
  • Users may not hear both sides of conversation.
base station20
Base Station
  • Radio is connected to dispatch center and remotely controlled.
  • Radio can be used to access repeaters.
  • Radio does not have a squelch tail.
  • They extend the coverage area.
  • Received signals are repeated.
  • Radio is installed for optimum performance.
  • Users hear both sides of conversation.
  • Operates on two frequencies.
  • Squelch tail is present.
  • Radio has no physical connection to dispatch.
  • Open a ticket in Remedy
  • Document your radio problem symptoms and what you have done to determine problem.
  • System outage contact Dispatch Office
user responsibility
User Responsibility
  • Never change your antenna
  • Insure you have an antenna
  • Battery
  • Keeping radio clean
is anyone out there
Is Anyone Out There
  • Your radio must be transmitting on the same frequency the radio you are trying to reach is receiving.
  • Your radio must be transmitting the same sub audible tone the radio you are trying to reach is listening for.
  • We don’t typically use receive sub audible tones on our portables and mobiles.
r a d i o
  • R-elax
  • A-djust Volume, Channel
  • D-etermine - What your going to say. Is it your time to talk?
  • I-nitiate Contact
  • O-ver
proper use
Proper Use
  • Hold the radio about an inch away
  • Push the PTT button and wait one second before talking.
  • Talk directly into the microphone
  • Identify who your calling and then yourself
  • Wait for their response then proceed.
use concise common terms
Use Concise Common Terms
  • Affirmative
  • Negative
  • Disregard
  • Clear or Out
  • Standby
  • Try to contact any Interagency Dispatch Center.
  • Try to contact any person listening to radio.
  • Use National Law Enforcement Emergency Channel, (NLEEC) to contact a law enforcement dispatcher.
banks zones channels
Banks, Zones, Channels
  • Banks contain zones or groups
  • Zones and Groups contain individual channels
We will now go over the radios by specific manufacturer for the types your group is using (BK, EF Johnson, Thales, etc).

This concludes the Radio Communications Basic Course



For Questions, Comments, Ideas or Errors please contact your local Telecommunications Specialist.

Spring 2008