GB599299A - Equaliser for telephonic repeaters - Google Patents
Equaliser for telephonic repeatersInfo
- Publication number
- GB599299A GB599299A GB29589/45A GB2958945A GB599299A GB 599299 A GB599299 A GB 599299A GB 29589/45 A GB29589/45 A GB 29589/45A GB 2958945 A GB2958945 A GB 2958945A GB 599299 A GB599299 A GB 599299A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- same
- loaded
- equalized
- series
- 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
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/14—Control of transmission; Equalising characterised by the equalising network used
- H04B3/143—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers
- H04B3/145—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers variable equalisers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
599,299. Two-way transmission. SOC. ANON. DE TELECOMMUNICATIONS. Nov. 6, 1945, No. 29589. Convention date, Sept. 23, 1942. [Class 40 (iv)] [Also in Group XL] In an equalizer 7 for telephonic repeaters, in which a tapped resistance 8 enables the attenuation to be adjusted for lines of different lengths, the same setting of the resistance 8 can be used for heavily loaded as for lightly loaded lines. To this end the resistance 8 is formed as a series of T-sections between terminals 14, 20, Fig. 2, and a switch 15 is closed or open according as the line to be equalized is loaded with 88 or 177 mH per 1800 metres. The resistances are so calculated that the settings of the wiper 16 are the same in both cases for the same lengths of time. In this way, the repeater is equalized for frequencies above the resonant frequency, 800 c/s., of the network. If distortion results at the lower frequencies, a similar resistance 18 with shunt condenser 19 is inserted in series.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR952393T | 1942-09-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB599299A true GB599299A (en) | 1948-03-09 |
Family
ID=9486587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29589/45A Expired GB599299A (en) | 1942-09-23 | 1945-11-06 | Equaliser for telephonic repeaters |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR952393A (en) |
GB (1) | GB599299A (en) |
-
1942
- 1942-09-23 FR FR952393D patent/FR952393A/en not_active Expired
-
1945
- 1945-11-06 GB GB29589/45A patent/GB599299A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR952393A (en) | 1949-11-16 |
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