GB790479A - Frequency correcting arrangements - Google Patents
Frequency correcting arrangementsInfo
- Publication number
- GB790479A GB790479A GB14562/54A GB1456254A GB790479A GB 790479 A GB790479 A GB 790479A GB 14562/54 A GB14562/54 A GB 14562/54A GB 1456254 A GB1456254 A GB 1456254A GB 790479 A GB790479 A GB 790479A
- Authority
- GB
- United Kingdom
- Prior art keywords
- band
- received
- modulated
- modulator
- transmitter
- 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
- 230000005540 biological transmission Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
- H04J1/065—Synchronisation of carrier sources at the receiving station with the carrier source at the transmitting station
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Stereo-Broadcasting Methods (AREA)
Abstract
790,479. Multiplex systems. AUTOMATIC ELECTRIC LABORATORIES, Inc. May 18, 1954 [May 29, 1953], No. 14562/54. Class 40 (4). In a carrier system, a pair of in-band pilot currents introduced at the transmitter and received at the transmitter and received in .selective parallel circuits are modulated on each other to produce a current lying outside the transmitted band and the intelligence band is modulated therewith to produce a band in which frequency errors arising from transmission are substantially cancelled. In the system, Fig. 2, which uses a carrier frequency of 304 Kc/s and pilot currents of 44 and 88 Kc/s, the received pilot frequencies 216+ error (d) and 260+ error (d) are selected by filters 271, 2711 and applied to the modulator 41. Modulation product 2(260+d)-(216+d)= 304+d is selected and is modulated with the whole received signal (164+d-264+d) in modulator 371 to reproduce a 40-140 Kc/s supergroup.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US790479XA | 1953-05-29 | 1953-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB790479A true GB790479A (en) | 1958-02-12 |
Family
ID=22148085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14562/54A Expired GB790479A (en) | 1953-05-29 | 1954-05-18 | Frequency correcting arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB790479A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4788675A (en) * | 1983-10-03 | 1988-11-29 | Jones Markley L | Music delivery system |
-
1954
- 1954-05-18 GB GB14562/54A patent/GB790479A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4788675A (en) * | 1983-10-03 | 1988-11-29 | Jones Markley L | Music delivery system |
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