Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1975-08-08
1977-05-10
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
325133, 358 86, 358139, H04B 356
Patent
active
040231046
ABSTRACT:
A system is provided incorporating a combining network for receiving television signals corresponding to the different television channels and for combining these signals for transmission over a cable. A plurality of input circuits is connected to the combining network, each circuit receiving a television signal of a different channel. Each input circuit includes a diode network for deriving a DC voltage level proportional to the television signal applied thereto. A calibration resistor is connected in series with the diode network and provides a means for connection to a meter for indicating a relative signal level. The combining network output is connected through an attenuator, a coupler and a power inserter to an amplifier, the output of which provides an appropriately amplified combined signal for application to a CATV trunk line.
REFERENCES:
patent: 3469190 (1969-09-01), Rheinfelder
patent: 3543163 (1970-11-01), Rheinfelder
patent: 3578898 (1971-05-01), Kuzminsky
patent: 3886457 (1975-05-01), Petaja
patent: 3908165 (1975-09-01), Cauldwell
Alpha Engineering Corporation
Britton Howard W.
Ng Jin F.
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