List of amateur radio modes

The term mode refers to the Amateur Radio Service by phone ( VHF) and telegraphy ( Morse code ) and computer-based, mostly digital, method of transmitting data (text mostly) via radio. However, it can be transmitted at a relatively high speed, even images and files.

While SSTV, AMTOR, Pactor, PSK, RTTY and others are dependent on an appropriate device or a computer, the Morse code (CW - Continuous Wave) can also be operated by hand. When a computer is used to decode the signals, the received LF signal is fed to the sound card. According to the signals to be transmitted from the sound card will be converted accordingly and then sent. In place of the sound card may also be a terminal node controller (TNC) such as a modem can be used.

The digital processes have expanded the amateur radio. With these, some extremely fast (such as HSCW - High Speed ​​Continuous Wave) method, data can be transmitted over normal radio channels in seconds.

Critical to the receivability is the signal -to-noise ratio (SNR). During telephony signals ( radio ) require a minimum bandwidth of about 3 KHz, and a signal - to-noise ratio of approximately 30 dB in order to still be understood other modes can be decoded even when the SNR is very low. It so happens that with Morse and some digital modes such as PSK31 with lower transmission power greater distances can be achieved than with radio.

Send species

The transmission types can also be distinguished from each other in terms of their modulation types.