Typically the radio teletype, RTTY frequencies, i. However this is not true in all cases because the different amateur radio bands have different bandwidths and also the requirements may be slightly different. A rough summary of RTTY frequencies is given in the table below:. However other digimodes or data modes can be found on these bands.
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HF Ham Radio Bands | HF Frequencies | Electronics Notes
Communication technologies that are specifically designed to improve "live" HF keyboard operation can now be achieved which were previously only theory, too complex, or too costly to implement to be practical. Thanks to the generosity of radio amateurs hams with programming knowledge, and to the Internet, new and powerful communications tools are available to all hams. The evolution and wide spread use of the Personal Computer that include a digital sound card for Digital Signal Processing DSP , is allowing radio amateurs to use these tools to develop new modes of digital communication. The distinguishing features of live HF digital operation today are the use of lower power, compact or indoor antennas and courteous operating techniques. This reverses the trend of several years ago. Confusion over band space is the obvious down-side as new and old modes compete for space on the HF bands.
This website and all content: copyright c HFpack, Inc. Olivia Software Link s Olivia Download. Olivia Frequencies Olivia 20 meter Frequencies. Olivia, the Magic Digital Mode Olivia MFSK digital communications are becoming popular in amateur radio because Olivia is one of the most robust methods of text keyboarding, that can perform superbly for long distance communications in ionospheric noise conditions where other modes fail.
As a Technician licensee, you have free access to all amateur frequencies above 50 MHz, but what about on the shortwave high-frequency HF bands? This chart helps you follow the rules. You have many more frequencies to use on the high-frequency HF bands, as shown in the following table. A complete chart of the U.