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 Title: |
US4737967:
Remote monitoring system receiver with dual baud rate selector
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Cahalan, Irving W.; Huntington Station, NY
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| Assignee: |
Hazeltine Corporation, Greenlawn, NY
other patents from HAZELTINE CORP. (244610) (approx. 177)
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| Published / Filed: |
1988-04-12
/ 1987-01-28
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| Application Number: |
US1987000007558
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| IPC Code: |
Advanced:
H04L 5/02;
H04L 5/14;
Core:
more...
IPC-7:
H04B 1/38;
H04B 17/00;
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| U.S. Class: |
Current:
375/223;
375/225;
Original:
375/009;
340/310.A;
375/010;
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| Field of Search: |
375/008-10,122,121
370/084,118
340/825.06,825.17,310 A
379/097,98
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| Priority Number: |
| 1987-01-28 |
US1987000007558 |
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| Abstract: |
A remote monitoring system (RMS) receiver which operates at a dual baud rate. The operating rate is selected to be the same as the rate being used by remote equipment originating the data link with the receiver. A modem associated with the receiver provides an indicator signal indicating phase shift keying (a high baud rate) or frequency shift keying (a low baud rate) is being received from the remote equipment. The indicator signal is used to select the baud rate of a programmable baud rate generator of the RMS receiver. This controls the baud rate signal which is supplied to an asynchronous interface controlling data transfer between the receiver and the modem.
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| Attorney, Agent or Firm: |
Onders, E. A. ;
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| Primary / Asst. Examiners: |
Griffin, Robert L.; Huseman, Marianne
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
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First Claim:
Show all 7 claims |
What is claimed is:
1. An apparatus comprising:
- (a) a remote monitoring system receiver including:
- (i) a processor having an input/output for receiving and transmitting data;
- (ii) a clock for generating a clock signal; and
- (iii) a baud rate generator receiving the clock signal and generating a high baud rate clock signal and a low baud rate clock signal;
- (b) modem means for selectively receiving/transmitting data at the high baud rate and at the low baud rate, said modem means having an indicator means for detecting receipt of a nigh baud rate signal and providing a high indicator signal in response thereto and for detecting receipt of a low baud rate signal and providing a low indicator signal in response thereto;
- (c) switch means having a first input port receiving the high baud rate clock signal, a second input port receiving the low baud rate clock signal, a control input receiving the high indicator signal and the low indicator signal, and an output port providing the high baud rate clock signal in response to receipt by the control input of the high indicator signal, said output port providing the low baud rate clock signal in response to receipt by the control input of the low indicator signal; and
- (d) storage register means having a first data port connected to the input/output of the processor, a second data port connected to the modem means and a clock port connected to the output port of the switch means, said storage register means for receiving, storing and transmitting data between said processor and said modem means in response to the baud rate signal provided by the output port of the switch means.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 15 U.S. patent(s) that reference this one
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