A TWO-CHANNEL SET FOR HIGH-FREQUENCY COMMUNICATION USING ELECTRIC POWER LINES
Abstract
A description is given of two communication channels in one direction, a dispatch channel and an administrative channel. Often for administrative communication a second, high-frequency, channel along transmission lines is used. A system w s developed for modernizing the EPO-2 industrial single-channel apparatus into a twochannel device without increasing the cost appreciably. This modernization principle can also be used in other single-channel communication devices using electric power lines. The following standard units are added in the modernized EPO-2 communication set: a differential unit with a 1-f transmission amplifier; a mounting plate with a limiter, the first modulator, a D-2.4 filter, and an i-f band filter (6-9 or 12-15 kc); a mounting plate containing the second demodulator, an i-f band filter, an 1-f filter (D-2.4), and an 1-f amplifier; a mounting plate with an oscillator and a busy and ringoff receiver. These same units are used in the V-3 h-f apparatus, and can be used as the second channel. The automatic equipment of the second channel consists of the following: an impulse subscriber relay; a receiving polarized relay; a receiving relay repeater; a series relay and a receiving delayed relay. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 22, 1961
- Accession Number
- AD0271853
Entities
People
- E.u. Lubman
- V.g. Kagan
Organizations
- National Air and Space Intelligence Center