GB1055509A - Apparatus for storing the result of a comparison between two trains of singals - Google Patents
Apparatus for storing the result of a comparison between two trains of singalsInfo
- Publication number
- GB1055509A GB1055509A GB19127/65A GB1912765A GB1055509A GB 1055509 A GB1055509 A GB 1055509A GB 19127/65 A GB19127/65 A GB 19127/65A GB 1912765 A GB1912765 A GB 1912765A GB 1055509 A GB1055509 A GB 1055509A
- Authority
- GB
- United Kingdom
- Prior art keywords
- message
- series
- read
- store
- count
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
- H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Dc Digital Transmission (AREA)
- Debugging And Monitoring (AREA)
Abstract
1,055,509. Data transmission. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 6, 1965 [May 11, 1964], No. 19127/65. Heading H4P. In a system for testing a line used for data transmission by repeatedly transmitting a test message, the receiver includes means for counting the received bits and for comparing the received message with an identical locally stored message, any difference detected causing the count indicated by the counter to be passed to a store. In the embodiment described the message, derived from the line signals, comprises a series of clock pulses preceded by a higher amplitude pulse indicating the start of the series. Counters count each bit and each start pulse. A magnetic tape record provides the local message series for comparison with the clock pulse series. Upon detection of an error, of a line break, or of 100 correct test messages, the bit count and message counts are read into a core store, together with signals indicating the reason for the read-in. The store is arranged in halves, used alternately so that, simultaneously with read-in, data stored previously can be read out to a magnetic tape recorder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1016364 | 1964-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1055509A true GB1055509A (en) | 1967-01-18 |
Family
ID=11133940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19127/65A Expired GB1055509A (en) | 1964-05-11 | 1965-05-06 | Apparatus for storing the result of a comparison between two trains of singals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1055509A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052900A1 (en) * | 1980-11-21 | 1982-06-02 | Koninklijke Philips Electronics N.V. | Signal comparison circuit |
-
1965
- 1965-05-06 GB GB19127/65A patent/GB1055509A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052900A1 (en) * | 1980-11-21 | 1982-06-02 | Koninklijke Philips Electronics N.V. | Signal comparison circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1437702B2 (en) | 1973-02-15 |
| DE1437702A1 (en) | 1969-10-30 |
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