Due to this upper atmosphere reflection, under the right conditions, it is possible for an AM station to be broadcast around the world. Lower frequency waves tend to be reflected better than high frequency waves. Another reason why AM radio waves can be heard far away is that they can be reflected off the ionosphere surrounding the earth. This is the reason FM stations sometimes fade in and out when driving in mountainous areas. FM radio waves on the other hand do not travel well through solid objects. Larger wavelength waves can travel farther because they can travel well through solid objects. How is this possible? Since AM radio operates at a lower frequency, it has much larger wavelengths. Wouldn’t it be handy if you could find a station broadcasting Colorado traffic reports while still in California? Surprisingly, this is sometimes possible occasionally signals originating in Denver can received here in Los Angeles. It would be convenient to know ahead of time so that you could plan your route accordingly. Suppose you would like to go through Colorado, but you heard there has been a big snowstorm there and your are not sure whether the freeway you want to take will be open. Imagine you are taking a cross-country road trip from Los Angeles to New York. As mentioned before, AM has one important advantage over FM, and that is its broadcast range. If you love morse code, amateur radio, national park camping in motor homes, designing mobile radio antennas or boondocking in your fifth wheel, Open Roads. You may be wondering now why anyone uses AM radio at all. The key to getting the most out of your radio is to understand how radio works and how engineering has played a part in the development of a device which most of us use everyday. There are many factors involved in finding and receiving stations, factors such as modulation, broadcasting power, time of day, and geographical location. Have you ever stopped to consider how a radio works? How does a radio know which station to play? What is AM, what is FM, and how are the two different? Why does FM sound better, but AM can be heard farther away? You have probably experienced a time when finding a particular radio station has been difficult. We discuss the most important topics and. Radio is something most of us take for granted. West, where travel and the open road are always the topic of conversation. Chris Hansen, the President of DuKane Chapter of ABATE of Illinois. 1), and instantly the car fills with sound. Well this was a lot of fun Today we got the opportunity to sit down and speak to Mr. You turn on the radio, tune it to your favorite station (see Fig. Everything seems almost perfect, yet something is missing. ![]() It’s a sunny summer day and you have the car windows down. You are driving down the open road, not a care in the world. Users using mobile radios while communicating location and direction on resource roads must use radio channels and frequencies that are posted. Posted radio channels and frequencies will supersede those on any map radio channel signage in the field will govern over the maps at all times.Figure 1: Your favorite station – A TechnoBabble radio broadcast featuring Illumin. The resource road radio channel maps are for information only. The maps should not be relied upon for appropriate channel selection in the field. In some cases, the channel assignments on the maps have not been implemented on the ground. ![]() The posted channel assignment maps are planning tools. Where posted, road users using mobile radios must use the posted channels and call protocols. Those using mobile radios to communicate location and direction are advised that most resource roads are "radio assisted" where use of mobile radios is not mandatory and as such should drive, at all times, safely according to road and weather conditions and not to solely rely on radio communications. ![]() It is discouraged to have select channels programmed into mobile radios as channel assignment may change without notice.Īreas of the province may be in transition to the standard bank of radio channels, it is recommended that users retain previously used frequencies until they are no longer required. government recommends that those that use mobile radios on provincial natural resource roads have the full bank of standard resource road radio channels, programmed in the standard format by commercial radio technicians.
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