Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-03-17
1986-07-01
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 10, 358139, 358148, H04N 504
Patent
active
045983151
ABSTRACT:
A signal processing apparatus comprises first and second switches connected respectively to an input terminal and an output terminal of the apparatus and defines first and second signal channels extending in parallel from the first switch to the second switch. The first and second switches are operable to connect a selected one of the signal channels between the input terminal and the output terminal. The first signal channel includes a signal processor, such as a frame synchronizer. The input terminal is connected to the signal processor even when the second channel is selected for connecting the input terminal to the output terminal so that a signal applied to the input terminal is applied to the signal processor as well as to the output terminal when the second channel is selected. Thus, the signal processor can be exercised and the output of the signal processor can be monitored while the second channel is utilized for transmitting a signal from the input terminal to the output terminal.
REFERENCES:
patent: 3098975 (1963-07-01), Schneiderman
Pioneer Stereo Receiver SX-3900 operating instructions by Pioneer Electronic Corporation.
Pioneer Stereo Cassette Tape Deck CT-8R, Jun. 1981, operating instructions.
Nakamura Michael D.
Penney Bruce J.
Gray Francis I.
Groody James J.
Parker Michael D.
Smith-Hill John
Tektronix Inc.
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