From the bitsavers.org collection, a scanned-in computer-related document. westernElectric :: telephony :: brochures :: 202A Brochure Feb63
Topics: data, communications, telephone, business, signals, machine, transmits, production, unattended,...
201.A, data communication between business machines - Bell System
Topics: data, communications, business, signals, processing, machine, transmits, production, offers,...
202.A, DATA phone, data communication over telephone - Bell System
Topics: data, communications, business, telephone, signals, processing, production, lines, unattended,...
From the bitsavers.org collection, a scanned-in computer-related document. westernElectric :: telephony :: brochures :: 401E Brochure Mar63
Topics: data, communications, telephone, receiving, business, signals, processing, machine, transmits,...
310-1 and 410-1 AC modulator-demodulator pair - M F Electronics Corp. 1966
Topics: demodulator, pin, frequency, output, cps, rms, data, modulator, vrms, input, volt rms, signal...
103.A, DATA phone, connect data stations over telephone - Bell System
Topics: data, communications, business, machine, signals, telephone, processing, production, receiving,...
R&D Report 1973-12: Interference due to data transmitted after the television field synchronising signal G.M. Le Couteur This report describes work which has been carried out to investigate interference caused by data transmitted during the period immediately following the broad pulse sequence of the television field-synchronising waveform. It is known that data signals transmitted at this time will appear on field fly-back lines and can sometimes cause interference. The report suggests a...
Topics: lines, data, flyback, bbc, synchronising, receivers, pulse, field, transmitted, signal, field...
From the bitsavers.org collection, a scanned-in computer-related document. tandbergData :: patents :: US4870513
Topics: signals, data, magnetization, coded, binary, recording, output, duration, magnetic, data signals,...
Apple Patent: APPLE_PATENT_4_910_670
Topics: data, ram, signal, disk, speed, counter, microprocessor, audio, signals, blanking, speed control,...
BBC Monographs Collection
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357
Nov 2, 2011
11/11
by
J. Redmond, D.J. Whythe, S. Christie, A.H.B. Bower, T.J. Wade
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BBC Engineering 111, December, 1978. J. Redmond, D.J. Whythe, S. Christie, A.H.B. Bower, T.J. Wade. * Principal Articles: * CEEFAX Progress * Perceptible Levels of Audio-Frequency Tones in the Presence of Programme * BBC Radio Facilities in the United States of America * A UHF Talkback System for Television Studios.
Topics: bbc, ceefax, television, tone, interrupted, receivers, frequency, engineering, studio, receiver,...
From the bitsavers.org collection, a scanned-in computer-related document. tandbergData :: patents :: US4780888
Topics: data, signals, binary, analog, integrating, signal, integrated, comparator, multivibrator, element,...
From the bitsavers.org collection, a scanned-in computer-related document. westernElectric :: telephony :: books :: Telecommunications Transmission Engineering Vol 1 Principles 2ed 1977
Topics: transmission, signal, signals, figure, frequency, noise, loss, circuit, carrier, system, bell...
R&D Report 1982-15 : L.F./M.F. radio-data: compatibility tests. A.G. Lyner This report describes investigations which have been carried out to establish suitable parameters for an angle-modulation system for adding data signals to an m.f. or l.f. sound broadcast programme. Mechanisms causing crosstalk between data and sound channels in such a system are discussed and the likely degree of crosstalk is assessed. Suitable parameters for a data-signalling system are suggested, based upon...
Topics: carrier, data, phase, impairment, signal, crosstalk, deviation, modulation, tests, conversion,...
From the bitsavers.org collection, a scanned-in computer-related document. mit :: lcs :: tr :: MIT-LCS-TR-258
Topics: input, port, output, signal, module, data, signals, acknowledge, design, byte, input port, output...
Bell System Technical Journal, 50: 2. February 1971 pp 667-681. The Picturephone System: Wideband Data Service . (Bender, E.C.; Howson, R.D.)
Topics: data, transmission, signal, analog, digital, codec, wideband, picturephone, noise, network, bell...
Bell System Technical Journal, 43: 6. November 1964 pp 2973-2983. Digital Data Signal Space Diagrams. (Davey, J.R.)
Topics: signal, pulse, phase, amplitude, pulses, modulation, diagrams, space, binary, frequency, half...
R&D Report 1974-10 : CEEFAX: Interference with television from data signals transmitted in the field-blanking period G.M. Le Couteur This Report presents the results of engineering broadcast tests which were carried out during the early part of 1973 to examine the suitability of certain lines in the television field-blanking interval for the transmission of CEEFAX digital data signals. It was concluded that lines 17 and 18 were preferred for this purpose.
Topics: data, lines, tests, sawtooth, impairment, flyback, observers, test, picture, interference, vertical...
R&D Report 1977-31 : Perceptible levels of audio frequency tones in the presence of programme. D.J. Whythe This Report describes subjective tests that were performed to assess the level of an interrupted tone, as a function of frequency, that would cause 'perceptible' and 'just perceptible' interference when added to programme signals. Results are given both for tests conducted entirely at baseband frequencies, using a high-quality monitoring loudspeaker, and for tests using amplitude- or...
Topics: tone, interrupted, programme, khz, peak, modulation, frequency, tests, receivers, levels,...
From the bitsavers.org collection, a scanned-in computer-related document. westernElectric :: telephony :: books :: Telecommunications Transmission Engineering Vol 1 2ed 1977
Topics: transmission, signal, signals, figure, frequency, noise, loss, circuit, carrier, system, bell...
From the bitsavers.org collection, a scanned-in computer-related document. tandbergData :: patents :: US4845573
Topics: magnetic, signals, data, filter, bias, amplifier, current, write, signal, second, write current,...
From the bitsavers.org collection, a scanned-in computer-related document. tandbergData :: patents :: US4803704
Topics: signals, phase, data, signal, clock, circuit, comparator, binary, loop, locked, data signals, phase...
From the bitsavers.org collection, a scanned-in computer-related document. tandbergData :: patents :: US4761695
Topics: signals, data, write, binary, magnetic, signal, recording, amplifier, respective, coder, data...
R&D Report 1981-04 : VHF radio-data: experimental BBC transmissions. S.R. Ely This report describes in detail a new system for transmitting data signals from vhf radio-broadcast transmitters along with the normal sound-programme signal. These data signals are primarily intended to aid radio listeners in tuning their receivers to a desired station or programme. These data signals are primarily intended to aid radio listeners in tuning their receivers to a desired station or programme. They...
Topics: block, data, synchronisation, code, crc, khz, transmitted, subcarrier, bbc, decoder, biphase...
Bell System Technical Journal, 44: 8. October 1965 pp 1567-1604. Wideband Data on T1 Carrier. (Travis, L.F.; Yaeger, R.E.)
Topics: data, carrier, signals, signal, transmission, wideband, timing, terminal, channel, serial, system...
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Feb 5, 2020
02/20
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Bell labs
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MAY 1964 DATA SET 103F INTERFACE SPECIFICATION TECHNICAL REFERENCE
Topics: data, communications, business, machine, signals, telephone, processing, production, receiving,...
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Feb 12, 2020
02/20
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Inventor: John V Harrington Rosen Paul
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Method of land line pulse transmission In june 27, 1955 the first computer modem was made. The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accur
Topics: Modem, modulation, demodulation, vacuum tubes, data, communications, machine, signals, telephone,...