Showing posts with label HF. Show all posts
Showing posts with label HF. Show all posts

December 7, 2009

Botswana: HF fixed radios


Since its independence in 1966, Botswana is experiencing harmony, stability and excellent economic growth. The commercially exploited diamonds found in Botswana is a source of its economic and geological wealth. Many foreign investors and social workers have shown great interest in the growth of this country. The need for powerful networking and communication is thus the need of the hour in Botswana. HF fixed radios, and vehicle mount communication systems are of great importance to workers who have to go deep into the country side.

The HF fixed radios come in different models according to the usage and the need. In desert areas or in mines communication is impossible without the help of powerful network systems. Governments as well as private organizations are always looking for flexible, cost effective and reliable communication systems for remote access mostly during times of emergency. High frequency radios are preferred from normal networks for these urgent and reliable communication needs.

Instant voice, instant messaging, email, fax and GPS navigation are some of the features of HF Fixed radio and vehicle mounted communication systems. Community workers and miners who have to travel to remote areas in Botswana will find this HF fixed radio reliable and really very useful in times of emergency. The government and other organizations need the vehicle mounted HF radios to keep up the constant and consistent network for transfer of important data and messages.

Fixed base stations are used for controlling the mobile and portable communication networks. HF fixed radio network need minimum infrastructure and hence considered as best suited during times of disaster and emergency. The cost for this form of network is also very nominal when compared to other communication network systems. HF radios are very tough so as to withstand any extreme condition and are also very cost effective.

The fact that the military uses these HF radios shows that this communication system has secured and reliable networks wherein the data and the voice messages are encrypted and secured using the latest technologies. Simultaneous communication among a group or many operators is possible in HF fixed radios. This is one reason why it is said to be most effective for disaster control and management as it can easily and quickly connect with any number of operators simultaneously.

HF radio base stations can also connect to VHF and UHF radio systems. It can also work along cellular phones and land line telephones also. It is simple to operate and can be carried and operated at any place or location with less hassle. This is what has made the HF fixed radio base stations and vehicle mounted networks a necessity in Botswana. Economically developing country like Botswana can rely on such high frequency, cost effective communication systems for all its development and emergency needs. The government and the military will find it very useful during riot and disaster control. Local police and security services can use these HF radios to control crimes in the country.

Botswana Tourist Information

April 21, 2009

Codan Radios: Manpacks


With communications becoming much easier and simple, organisations always strive for lower operational cost and flexibility in their communication systems. Codan Manpack transceiver is the ideal solution for all your portable and remote communication needs. A portable Codan Manpack will enable the portable transceivers to communicate with a central base station or any other transceiver.

What would you do when you are in a dire need of communicating in an environment which is accessible only by foot and isolated from any vehicles or power? The best possible answer would be to opt for a Manpack Radio. When you think about Manpack Radios, Think Codan. Codan has a variety of offerings which is suitable for any remote and portable communication need. Codan Manpacks come in both military and non-military versions.

Need to know more about Codan Radios? Visit our Codan section on the website or get in touch and let us tell you what you need!

May 19, 2008

What is HF SSB?

Do you require Long Range Communications?

HF SSB is the answer

HF means High Frequency whereas SSB means Single Sideband

HF & SSB radios are capable of providing communication over hundreds to thousands of Kilometres.

Buy our high frequency Codan Products at Comm Spec

HF provides communication beyond the range that is possible with conventional VHF/UHF systems, which rely on the line-of sight between communicating parties. HF on the other hand, achieves long distance communication by bouncing its signal off the ionosphere (sky waves) as shown in the Diagram below. Until recently there had always been a dead space of roughly 70 -220 Km between the point where the ground wave terminated and the point where the first sky wave returned to earth.

Standard Base Station Antenna Propagation

This operational shortcoming is unacceptable and a solution has been found by using the NVIS System. Under this system, the antenna radiates a signal near vertically up to bounce down off the ionosphere, thus providing an uninterrupted footprint from ground "0" to a radius of 6,000 Km or more.



NVIS Base Station Antenna Propagation

This operational shortcoming is unacceptable and a solution has been found by using the NVIS System. Under this system, the antenna radiates a signal near vertically up to bounce down off the ionosphere, thus providing an uninterrupted footprint from ground "0" to a radius of 6,000 Km or more.