JPS6450628A - Transmission level adjusting system for data modulator and demodulator - Google Patents
Transmission level adjusting system for data modulator and demodulatorInfo
- Publication number
- JPS6450628A JPS6450628A JP62206545A JP20654587A JPS6450628A JP S6450628 A JPS6450628 A JP S6450628A JP 62206545 A JP62206545 A JP 62206545A JP 20654587 A JP20654587 A JP 20654587A JP S6450628 A JPS6450628 A JP S6450628A
- Authority
- JP
- Japan
- Prior art keywords
- data
- level
- demodulator
- channel
- data modulator
- 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.)
- Pending
Links
Landscapes
- Maintenance And Management Of Digital Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To eliminate the sending level adjustment at the site by sending a level suitable for a receiver side equipment automatically through the second channel so as to improve the quality of data communication. CONSTITUTION:A signal of a main channel received by a receiver side data modulator-demodulator 2 is monitored by a reception level detector 4 and if the level is deviated from the specified level, a request to revise the sender level to the sender side data modulator-demodulator 1 is given to a second channel transmitter 5. The second channel transmitter 5, based on its request, uses a band for the data different from a data channel and sends the data to the sender side data modulator-demodulator 1 through an adder 7 and a transmission level adjusting equipment 9. A second channel receiver 8 of the sender side data modulator-demodulator 1 receives the data and requests the transmission level changeover to the transmission level adjusting equipment 9 based on the reception data. The transmission level adjusting device 9, based on the request, switches the level and sends the data to the reception side data modulator-demodulator 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62206545A JPS6450628A (en) | 1987-08-21 | 1987-08-21 | Transmission level adjusting system for data modulator and demodulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62206545A JPS6450628A (en) | 1987-08-21 | 1987-08-21 | Transmission level adjusting system for data modulator and demodulator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6450628A true JPS6450628A (en) | 1989-02-27 |
Family
ID=16525155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62206545A Pending JPS6450628A (en) | 1987-08-21 | 1987-08-21 | Transmission level adjusting system for data modulator and demodulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6450628A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006333239A (en) * | 2005-05-27 | 2006-12-07 | Nec Electronics Corp | Interface apparatus and communication control method |
-
1987
- 1987-08-21 JP JP62206545A patent/JPS6450628A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006333239A (en) * | 2005-05-27 | 2006-12-07 | Nec Electronics Corp | Interface apparatus and communication control method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3584176D1 (en) | Modulator-demodulator. | |
NO865085D0 (en) | DEVICE FOR CONTROL SEND POWER IN A RADIO TRANSMISSION ROAD | |
EP0164749A3 (en) | High speed data communications system | |
TW347616B (en) | Method and apparatus for performing fast power control in a mobile communication system a method and apparatus for controlling transmission power in a mobile communication system is disclosed. | |
EP1094644A3 (en) | Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system | |
CA2199542A1 (en) | Methods and Apparatus for High Data Rate Transmission in Narrow Band Mobile Radio Channels | |
CA2202829A1 (en) | Devices for transmitter path weights and methods therefor | |
MX9601213A (en) | Method and apparatus for controlling power in a variable rate communication system. | |
JPS56126339A (en) | Mobile communication system | |
MY110864A (en) | Dynamic control of transmitting power at a transmitter and attenuation at a receiver | |
WO2000034798A3 (en) | Apparatus and method for triggerable location reporting | |
JPS57159148A (en) | Adaptive modulation system | |
ATE341866T1 (en) | DATA TRANSMISSION AND RADIO SYSTEM | |
WO2001028150A3 (en) | Method and apparatus for eliminating the effects of frequency offsets in a digital communication system | |
CA2268292A1 (en) | Method for transmitting multiresolution audio signals in a radio frequency communication system | |
JPS6450628A (en) | Transmission level adjusting system for data modulator and demodulator | |
DE3788616D1 (en) | Method for transmitting a digitized radio signal. | |
CA2124878A1 (en) | Intermediate frequency receiver apparatus | |
EP0350947A3 (en) | Radio channel control method | |
JPS56106441A (en) | Remote monitor controlling device | |
JPS5624867A (en) | Facsimile simultaneous transmission and reception system | |
JPS57143990A (en) | Picture answering service system | |
JPS57203352A (en) | Call system for exclusive order-wire circuit | |
JPS6482713A (en) | Radio communication system | |
JPH0763157B2 (en) | Tunnel wireless communication system |