Two-Way Radios

Two-Way Radios from Allen Leigh Security and Communications

Two-way radios are the most cost effective and fastest way to communicate within an organization of 2 to 200+ people. Allen Leigh sells Vertex Standard radios, Vertex are some of the highest quality two-way radios on the market. Vertex is a Japanese company owned by Motorola that uses nothing but the best, from components to the manufacturing processes. Vertex offers a THREE YEAR WARRANTY on all their radios.

2 Way Radio - Vertex VX-821 Submersible Handheld

Two-Way Radio Systems

There are a number of different radio systems available and we will only talk about two, simplex systems and repeater systems, as these are the two most common radio systems for small to medium sized businesses.

Simplex Radio Systems

Simplex radio systems are simple. All radios are programmed to a particular frequency which is allocated to you by Industry Canada. We can initially set your radios on a temporary frequency so you may use your radios immediately while you wait for Industry Canada to find a frequency for you to use on a permanent basis. When you are allocated a permanent frequency we will reprogram your radios to the new frequency free of charge.

Repeater Radio Systems

With a Repeater Radio System there are two frequencies that your system uses, one frequency for transmitting and one for receiving. A typical hand held radio has a maximum power of 5 Watts. With a Repeater system, the repeater picks up weak transmissions and rebroadcasts them at a higher power. Now a little handheld has the same effective power as a base station greatly increasing your range and penetrating power. Note that Industry Canada regulates who can use a Repeater and how many users are required before they will issue a pair of frequencies.

Two-Way Radio Bands

There are two bands of frequencies available for use in our industry, one is VHF and the other is UHF. Each band has other sub bands within them as well. VHF covers a spectrum of frequencies from 30-300 MHz while the sub band for commercial communications only covers 136-174 MHz. UHF covers a spectrum from 300-3000 MHz while the sub bands for commercial communication covers 403-470, 800 and 900 MHz. The VHF spectrum is heavily occupied, may VHF users share a frequency with someone else within the province. Industry Canada does their best to minimize the chances of you hearing someone else but sometimes it is unavoidable. UHF has far less users and is inherently more privet because of this. All radios manufactured within the last 15 years have the option of programming a tone coded squelch, commonly referred to as a "tone". Regardless if you chose VHF or UHF we can program your radios with a tone to prevent you from hearing other users on your frequency that are not part of your group. Once you lift your microphone off the hook or push the monitor button the tone is temporarily disabled and you will again hear all users. If you are hearing users that are not part of your group it is important to make sure all your vehicles have properly installed mic hangers and the operators are using the mic hangers when they are finished talking.

Two-Way Radio Power

Most mobiles have a power rating between 25 and 50 watts. Most portable (handheld) radios have a power rating between 2 and 5 Watts. In the band of frequencies that we utilize, Industry Canada dictates that you cannot operate a mobile above 30 Watts. The performance difference between a 50 Watt radio and 25 / 30 Watt radio is negligible. The curvature of the earth plays a large role as well as the height of the antennas and ground elevation. Trees and other obstructions effect range more then the amount of power being transmitted.

Two-Way Radio Range

Big factors in the effective range are, the sensitivity of the radios, which antenna is used, where the antenna is located and any nearby obstructions. The best location for any antenna is as high as possible but still being on a flat metal plane, like a metal roof on a vehicle. It is best to keep the antenna away from other antennas and metal objects like an exhausts stack or hopper. If an antenna is mounted near a metal object like a hopper on a Combine the majority of the signal will travel from the antenna directly into the metal hopper and very little signal will travel along the horizon. With a metal roof, any High Gain Antenna will give you great coverage. A fibreglass or plastic roof requires a No Ground Plane (NGP) antenna to get the best coverage. 

Two-Way Radio Use

To use the unit, make sure the radio is ON, lift the microphone off the mic clip and push the PTT (Push to Talk) button. All base stations, mobiles and portables that are ON will now hear the message as long as they are within range. Release the PTT to listen for a response back. Everyone is now within the loop of communications and everyone can make better decisions or call for help! Imagine how much time you will be able to save with a system like this - no more back tracking. Everyone is more accessible for greater productivity!

You do not have monthly bills like cellular and you don’t have long distance charges either. What you do have is good clear communications for your entire operation. There is an annual fee for the frequency that Industry Canada assigned you. The fee is based on the number of radios you have. The current fees are $41 per mobile and $106 per base stations. The 1st year is about 20% more to cover the cost for Industry Canada finding you a frequency.

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