GB1372905A - Apparatus for tesring data modems which simultaneously transmit and receive freuquency multiplexed signals - Google Patents
Apparatus for tesring data modems which simultaneously transmit and receive freuquency multiplexed signalsInfo
- Publication number
- GB1372905A GB1372905A GB5248472A GB5248472A GB1372905A GB 1372905 A GB1372905 A GB 1372905A GB 5248472 A GB5248472 A GB 5248472A GB 5248472 A GB5248472 A GB 5248472A GB 1372905 A GB1372905 A GB 1372905A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hybrid coupler
- signals
- tesring
- freuquency
- receive
- 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
- 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
- H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Bidirectional Digital Transmission (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19887671A | 1971-11-15 | 1971-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1372905A true GB1372905A (en) | 1974-11-06 |
Family
ID=22735224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5248472A Expired GB1372905A (en) | 1971-11-15 | 1972-11-14 | Apparatus for tesring data modems which simultaneously transmit and receive freuquency multiplexed signals |
Country Status (7)
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2386202A1 (fr) * | 1977-03-31 | 1978-10-27 | Cit Alcatel | Dispositif de test en local pour un equipement de transmission de donnees duplex |
| EP0014583A1 (en) * | 1979-02-13 | 1980-08-20 | Macwell Systems Limited | Improvements in or relating to fault-finding apparatuses |
| JPH083074Y2 (ja) * | 1989-06-15 | 1996-01-29 | 松下電工株式会社 | テレビジョン受像機用リモートコントローラー |
-
1972
- 1972-11-14 DE DE19722255651 patent/DE2255651A1/de not_active Ceased
- 1972-11-14 GB GB5248472A patent/GB1372905A/en not_active Expired
- 1972-11-14 CA CA156,295A patent/CA970888A/en not_active Expired
- 1972-11-14 FR FR7240372A patent/FR2161606A5/fr not_active Expired
- 1972-11-14 CH CH1656472A patent/CH565487A5/xx not_active IP Right Cessation
- 1972-11-14 SE SE1479772A patent/SE383080B/xx unknown
- 1972-11-15 JP JP11397072A patent/JPS4980913A/ja active Pending
-
1980
- 1980-09-17 JP JP13306880U patent/JPS56104260U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56104260U (US08088918-20120103-C00476.png) | 1981-08-14 |
| CA970888A (en) | 1975-07-08 |
| SE383080B (sv) | 1976-02-23 |
| JPS4980913A (US08088918-20120103-C00476.png) | 1974-08-05 |
| CH565487A5 (US08088918-20120103-C00476.png) | 1975-08-15 |
| DE2255651A1 (de) | 1973-05-24 |
| FR2161606A5 (US08088918-20120103-C00476.png) | 1973-07-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |