GB672729A - Carrier terminal equipment - Google Patents
Carrier terminal equipmentInfo
- Publication number
- GB672729A GB672729A GB2092949A GB2092949A GB672729A GB 672729 A GB672729 A GB 672729A GB 2092949 A GB2092949 A GB 2092949A GB 2092949 A GB2092949 A GB 2092949A GB 672729 A GB672729 A GB 672729A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- modulator
- terminal equipment
- signals
- transformers
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/08—Arrangements for combining channels
- H04J1/085—Terminal station; Combined modulator and demodulator circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplitude Modulation (AREA)
Abstract
672,729. Two-way transmission. DEHN, S. G. (Automatic Electric Laboratories, Inc.). Aug. 11, 1949, No. 20929/49. Class 40 (iv). In a two-way carrier current terminal equipment a balanced modulator and an amplifier effect the transference of signals both from a low-frequency line 1 to a high-frequency line 73 and vice versa. In the arrangement shown, the audio signal from line 1 is applied to the centre taps of the modulator transformers 33 and 35 via transformers 11 and 19 and a resistor 17 which is of such a value as to absorb approximately half the signal so that the arrangement comprises a differential transformer. The modulated output, after amplification, is passed via a directional filter 63 to the H.F. line and the carrier is suppressed by a tuned circuit 58, 60. H.F. signals are also applied to the modulator through the transformer 19 via a directional filter 65, but the L.F. output is in this case selected by a low-pass filter 79 and applied to line 1 at the points 81 and 83 of the hybrid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2092949A GB672729A (en) | 1949-08-11 | 1949-08-11 | Carrier terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2092949A GB672729A (en) | 1949-08-11 | 1949-08-11 | Carrier terminal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB672729A true GB672729A (en) | 1952-05-28 |
Family
ID=10154193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2092949A Expired GB672729A (en) | 1949-08-11 | 1949-08-11 | Carrier terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB672729A (en) |
-
1949
- 1949-08-11 GB GB2092949A patent/GB672729A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB827974A (en) | Improvements in or relating to devices for transmitting via a transmission line audio-frequency signals | |
| GB540185A (en) | System of transmission of electrical waves | |
| GB744555A (en) | Improvements in or relating to electric signal amplifiers | |
| GB672729A (en) | Carrier terminal equipment | |
| GB533894A (en) | Improvements in modulated-carrier signal-translating systems | |
| GB409360A (en) | Improvements in alternating current signal generators and amplifiers | |
| GB592917A (en) | Improvements in or relating to volume control and mixing arrangements in broadcasting systems and the like | |
| GB648622A (en) | Improvements in angle modulation detector circuits | |
| GB777203A (en) | Improvements in or relating to low frequency transistor amplifiers | |
| GB486931A (en) | Improvements in or relating to electric circuit arrangements for combining the effects of two or more alternating current signal sources | |
| GB312904A (en) | Improvements in electrical telegraph and like signalling systems | |
| GB172394A (en) | Improvements in and relating to radio signalling systems | |
| GB646218A (en) | Audio frequency reproduction system | |
| GB588479A (en) | Improvements in and relating to receivers for frequency modulated electrical oscillations | |
| GB516286A (en) | Improvements in tone-control circuits for audio-frequency amplifiers | |
| GB556369A (en) | Speech transmission system | |
| GB629954A (en) | Improvements in circuit arrangements employing thermionic valves | |
| GB365163A (en) | Amplifying arrangement for telephone signals or the like | |
| GB547182A (en) | Improvements in or relating to signal-modulating systems | |
| GB730558A (en) | Improvements in or relating to output control circuits for electrical transmission networks | |
| GB226338A (en) | Improvements in telephone and like electrical transmitting systems | |
| GB611841A (en) | Improvements in and relating to muting devices for signal receivers | |
| GB464052A (en) | Compensating networks for electrical transmission circuits | |
| GB707081A (en) | Electrical communication system | |
| GB906407A (en) | Improvements in or relating to electric filter networks |