Telegraph typewriter

Functional Structure

Electrically typewriter is usually composed of a keyboard, a transceiver, and a printing mechanism. When reporting, press a certain character key to automatically send the code signal signal to the channel; when the retrieval, the current signal signal from the channel can be automatically received, and the corresponding characters can be printed. A electrical passenger with a complex pinner and a automatic habit, can be included, stored, and transmitted. The power transmission machine is convenient, and the info procedures are simple, and therefore it has been widely used.

Characteristics

Electrophich has both a speed of the phone, and has the accuracy of the typewriter, especially when there is information in the text, this advantage is particularly obvious. It is widely believed that it is more cheap than telegraphs and phones in addition to efficient and accuracy.

is different from the fax, and the electrical biography is a product that is more early, which is a bit approximate telegram with the previous communication equipment that is generally used in the fax machine. Early national government units, state-owned import and export companies are generally used, but now they are basically replaced by the fax machine or the Internet.

Classification

The electrical passenger has two types of mechanical and electronic.

Mechanical electrical passenger

Mainly encoded, decoded, motor drive and timing, typical, typical, box type And the word wheel, etc. Mechanical electrical passenger structure is complicated, inconvenient maintenance, low operating rate, large noise, and gradually been replaced by electronic circuit passes.

Electronic Pipeline

Improve encoding, decoding, and timing with electronic circuitry, drive with step-in motor, printing method using a hit chrysanthemum petal or needle, The inkjet or other matrix print, high working rate, smaller noise. Modern electronic electrical passes controlled by microprocessor, information storage, editing, sending, and reception of information can be achieved with internal memory or disks. The electronic circuit use is convenient to use, and the ability to vibrate, tilted is strong, and the work reliability is high.

Principle

Pipeline works in a starting method, usually using five units of electric code, that is, international code. It is "having" with five equal long pulses, "no" 32 combinations represent characters (letters, numbers, punctuation), plus pulse and stop pulse transmission. Some electrical passes use seven units of electric compilation, namely the international code. It represents 128 combinations represent various characters and control information, which can adapt to a wide range of use requirements. The notification rate of the mechanical electrical passets is usually 50, 75, 100 baud (five units) and 110 baud (seven units). The info rate of the electronic circuit paste can reach 300 baud.