Signal generator

Details Signal generator Signal generator

1989-09-20

1990-10-02

Olms, Douglas W.

Pulse or digital communications

Repeaters

Testing

331 78, 364726, H04K 100

Patent

active

049612034

ABSTRACT:
A signal generator produces a spread-spectrum bandwidth signal in the frequency range 40 to 90 KHz for use in a domestic mains signalling system. In the generator, sixteen individual frequencies, equi-spaced in that range, pass to samplers operating at a clock frequency of 204.8 KHz and then to quantisers before storage. The resulting signals are then assembled in appropriate manner by selector switch before being filtered when (temporarily) in the frequency domain.
The resultant signals duly reach catalogue store, whose output can be used for programming an EPROM in a mains signalling interface unit.

REFERENCES:
patent: 3605019 (1971-09-01), Cutter
patent: 3679882 (1972-07-01), McAuliffe
patent: 3777277 (1973-12-01), Naber
patent: 3789149 (1974-01-01), Clark
patent: 3808412 (1974-04-01), Smith
patent: 4071906 (1978-01-01), Buss
patent: 4313197 (1982-01-01), Maxemchuk
patent: 4520491 (1985-05-01), Raulin et al.
patent: 4601045 (1986-07-01), Lubarsky
"Third Generation Codec With Programmable Filters", A. Misherghi et al., Electronic Engineering, vol. 55, No. 684, pp. 37-40, 43, Dec. 1983.
Lawrence et al., "Tutorials in Modern Communications", Section 6, Secure Communication, pp. 328-330, 1983 copyright.

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