November 2007
Intermediate to advanced
736 pages
46h 32m
English
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VHF/UHF RADIO SYSTEMS
Propagation in the VHF and UHF bands between 30 MHz and 3 GHz takes place in the tropospheric mode. The major use of two-way radio communications in the VHF and UHF bands is communication between a fixed base station and several mobile units located on vehicles, ships, or aircraft in the frequency band 30-470 MHz. Typical applications are in control-tower-to-aircraft communication at airports, fire departments, ship control within harbours, police departments, armed-forces field operations, pipeline and transmission line maintenance, highway maintenance, taxicab and delivery vehicle despatch, and personnel paging systems.
Since these systems operate in frequencies above 30 MHz, their range of operation is limited to within ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.