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Adjacent Channel Interference

Adjacent Channel Interference

by | Jun 19, 2020 | Articles, Top

INTRODUCTION Like any other technology, the history of radio is one that developed over time.  Radios started off being spark gap transmitters which contained radio energy over a wide range of frequencies.  Eventually a range of frequencies became referred...
Exclusive vs. Shared Channels

Exclusive vs. Shared Channels

by | Mar 9, 2020 | Articles, Top

The issue of exclusive channels is the most critical item in the design and implementation of advanced radio systems.  From a legal standpoint, all trunking formats in use today (except for SmartTrunk and Capacity Plus) requires the use of exclusive frequencies to...
Methods of Data Transport

Methods of Data Transport

by | Jan 26, 2020 | Articles, Design, Top

Different types of data require a different type of network implementation.  The discussion in this article is based upon GPS data, but there are many other types of data that are sent over radio and cellular systems.  Each type of data is handled best by one...
Signaling Methods for Radio Systems

Signaling Methods for Radio Systems

by | Jan 4, 2020 | Articles, Design, Top

  There are many different signaling methods for different types of radio systems that have been developed over the years.  Each signaling system has its advantages which make the system work well for its designed purpose and has disadvantages which make the...
Conventional Radio

Conventional Radio

by | Dec 31, 2019 | Articles, Coverage, Design, Top

Land mobile radio (LMR) started in the 1930s and has made a lot of progress since that time.  Originally all LMR radios were one-way radios, because they could only talk in one direction.  The one-way radios would receive a message in the vehicle where a receiver was...