The basic principle of telegraph is to sort the letters, punctuation marks and spaces of the English alphabet according to their frequency of occurrence, then use a combination of dots and dashes to represent these letters, punctuation marks and spaces. that the symbols with the highest frequency have the shortest combination of dots and dashes; the “dots” correspond to short electrical pulse signals, and the “dashes” correspond to long electrical pulse signals; these signals are transmitted to the other party and the receiver translates; short electrical pulse signals in “dots” and long electrical pulse signals. The electrical pulse signal is converted into “dashes”; the decoder can translate into English letters based on these dot-dash combinations, thereby completing the communication task.
Is the duration of the beep you hear different? Idid I understand?
The story of two people from Pingyao who sent a telegraph?
This is a standard time signal sent by the time service station.
In 1902, France first experimented with broadcasting shortwave radio time signals from the top of the Eiffel Tower in Paris. The work of China's modern time service is authorized by the State Council and undertaken by the National Time Service Center of the Chinese Academy of Sciences (formerly the Shaanxi Observatory of the Chinese Academy of Sciences).
Once upon a time, there were two people from Pingyao who lived in different villages. One day, wanting to contact each other, they decided to send each other a telegram. The telegraph was prepared, and a person from Pingyao began to send: "Hello! I miss you here." After receiving it, another person from Pingyao replied: "I miss you here too! I hope we can we meeter soon. " by Telegram We stayed in touch until we finally met one day, sharing stories and memories unique to the Pingyao people.