Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 17 - Monitoring; Testing
Patents for H04B 17 - Monitoring; Testing (29,423)
08/1988
08/02/1988CA1240020A1 Telesignalling method and device for a digital transmission link
08/02/1988CA1240013A1 Control signalling arrangement for a digital transmission system
07/1988
07/14/1988DE3644175A1 Method for transmitting data using satellites
06/1988
06/21/1988US4752926 Orderwire detector for communication systems
06/14/1988CA1238088A1 Test equipment for simulating multipath interference
05/1988
05/31/1988CA1237546A1 Loopback of a pcm signal with loopback command signal bits placed in each frame of the signal as predetermined ones of overhead bits
05/26/1988DE3638568A1 Device for analysing the transmission quality of digital radio links
05/25/1988EP0268391A1 Detecting faults in transmission lines
05/18/1988EP0267528A2 Digital data transmission system with adressable repeaters having fault localization devices
05/10/1988US4744083 Satellite-based position determining and message transfer system with monitoring of link quality
05/10/1988CA1236580A1 Characterisation of digital radio signals
05/10/1988CA1236552A1 Telesignalling method and device for a digital transmission link
05/10/1988CA1236551A1 Telesignalling device and method whereby data transmitted by a digital link are replaced by messages
05/03/1988US4742530 Radio relay method and its apparatus for digital communication
05/03/1988US4742518 Fault location system for a digital transmission line
04/1988
04/12/1988US4737949 Transmission system for digital repeater supervisory code transmission
04/12/1988US4737928 High accuracy random channel reproducing simulator
04/06/1988EP0262860A2 Digital signal analysis by transformation to vector domain
04/05/1988US4736464 Method for the additional transmission of information via a digital auxiliary channel, in an optical transmission system
03/1988
03/23/1988EP0261003A1 Equipment for the step-by-step remote locating of repeater pairs in a digital link
03/22/1988US4733223 Apparatus for monitoring a communications system
02/1988
02/24/1988EP0256944A1 Measuring bench for wideband radio relay link
02/23/1988US4727540 Apparatus for remote signalling on a digital transmission link
02/17/1988EP0255838A1 Signal processing system
02/16/1988CA1232986A1 Supervising and controlling system for a communication station in a tdma communication system
02/16/1988CA1232754A1 Method of removal of impure gasses from scrap preheating and equipment for use of same
02/11/1988DE3626294A1 Method for determining errors in a digital transmission system
02/02/1988US4723303 Method of and circuit arrangement for measuring the quality of radio-transmission channels of a radio-transmission system
01/1988
01/28/1988DE3623783A1 Information transmission system
01/26/1988CA1232020A1 Channel monitoring circuit for use in a repeater station over radio digital transmission
01/20/1988EP0253482A1 Measuring adjacent channel power
01/19/1988US4720710 Paging receiver having a plurality of test modes
01/12/1988CA1231453A1 Digital signal transmission cable noise analyzer
01/05/1988US4718115 Radio receiver for carrying out self diagnosis without interference
12/1987
12/29/1987US4716563 Demodulation of auxiliary low frequency channels in digital transmission systems
12/22/1987US4715046 Frequency agile signal generator for emulating communications environments
12/22/1987US4715033 State information communication in a TDMA satellite communication network with high frame availability
12/22/1987CA1230654A1 Supervisory control network protocol for communication system
12/15/1987US4713810 Diagnostic technique for determining fault locations within a digital transmission system
12/10/1987DE3619175A1 Method for laboratory simulation of multipath fading processes
12/08/1987US4711976 Data transmission facility
12/08/1987EP0167531A4 Packetized ensemble modem.
12/01/1987US4710976 Optical repeater monitoring system
12/01/1987US4710924 Local and remote bit error rate monitoring for early warning of fault location of digital transmission system
12/01/1987CA1229889A1 Maintenance response signalling arrangement for a digital transmission system
11/1987
11/25/1987EP0246619A2 System and method for transmitting auxiliary signal in a multiplex communication system
11/24/1987US4709414 Optical fiber order wire system
11/24/1987US4709407 Band discriminating method in a receiver
11/24/1987US4709158 Arrangement for restoring the L.F. content of a digital signal
11/10/1987CA1229185A1 High-speed burst signal monitoring device
11/10/1987CA1229133A1 Radio relay method and its apparatus for digital communication
10/1987
10/27/1987US4703433 For analyzing the response of a device under test
10/21/1987EP0241954A2 Digital radio transmission system and mobile radio subscriber device for such a digital radio transmission system.
10/13/1987CA1228124A1 Interference wave detection circuit for use in radio receiver
10/08/1987DE3610726A1 Monitoring system for line networks
10/07/1987EP0240157A2 A single transmission line bidirectional optical communication system
09/1987
09/30/1987EP0238910A1 Apparatus for inserting local analogous service signals into digital service channels of a microwave link
09/23/1987EP0238288A1 Analysis of digital radio transmissions
09/23/1987EP0238284A1 Analysis of digital radio transmissions
09/22/1987US4696057 CN ratio measurement circuit
09/22/1987CA1227246A1 Method and device for measuring phase jitter on a transmission channel
09/16/1987EP0236946A2 Mobile receiver unit having function for providing information of electric field intensity
09/15/1987CA1226979A1 Receive data processing device for tdma satellite communications network
08/1987
08/27/1987WO1987005169A1 Signal processing system
08/25/1987US4689790 Method and apparatus for remote signalling on a digital transmission link
08/18/1987US4688226 Code error overlaying in digital transmission signals
08/18/1987US4688209 Method and apparatus for looping around a digital transmission line at a channel unit
08/11/1987US4686668 Loopback of a PCM signal with loopback command signal bits placed in each frame of the signal as predetermined ones of overhead bits
07/1987
07/30/1987EP0152423A4 Maintenance response signalling arrangement for a digital transmission system.
07/23/1987EP0151616A4 Control signalling arrangement for a digital transmission system.
07/21/1987CA1224550A1 Method of controlling a supervisory arrangement in a digital transmission system
07/14/1987CA1224284A1 Domestic satellite communication system
07/08/1987EP0228101A2 Method for monitoring a plurality of digital transmission lines, and arrangement for carrying out the method
07/07/1987US4679248 Test equipment for simulating multipath interference
07/07/1987CA1223928A1 Arrangement for restoring the l.f. content of a digital signal
07/01/1987EP0227389A2 Apparatus and method for calibrating recording and transmission systems
06/1987
06/30/1987US4677644 Method and apparatus for remote signalling by substituting a message for the data conveyed by a digital transmission link
06/10/1987EP0224707A1 Circuit arrangement for the self-control of a plurality of analogous electrical signals
06/10/1987CN85106869A Optical communication network system having rendezvous detecting function
05/1987
05/26/1987US4669091 Adaptive multipath distortion equalizer
05/05/1987US4663555 Method and apparatus for controlling a bimorph leaf which supports a deflectable head
04/1987
04/28/1987US4661996 Method and apparatus for indicating radio frequency carrier loss in remotely controlled vehicles
04/08/1987EP0216941A1 Apparatus for analysing two-channel transmission/reflection characteristics
04/07/1987US4656619 Supervising and controlling system for a communication station in a TDMA communication system
03/1987
03/31/1987US4654879 Cellular mobile radio subscriber location detection
03/31/1987US4654862 Digital signal transmission cable noise analyzer
03/31/1987US4654861 Method and device for measuring phase jitter on a transmission channel
03/31/1987CA1219978A1 Digital radio relay equipment
03/31/1987CA1219932A1 Variable frequency rf electronic surveillance system
03/31/1987CA1219931A1 Method and apparatus for monitoring suitability of a transmission path for transmission of digital data signals
03/25/1987EP0215437A2 Supervisory system in communication system
03/24/1987US4653070 Channel monitoring circuit for use in a repeater station over radio digital transmission
03/19/1987DE3530546A1 Transmission method for a fast and a slow data stream
03/18/1987EP0214657A2 Information transmission system with monitoring according to the in-service-monitoring fault localization method
03/18/1987EP0214333A1 Channel monitoring circuit for use in a repeater station of a radio digital transmission system
03/18/1987EP0114890B1 Method and apparatus for measuring the strength of a radio frequency signal
03/17/1987US4651320 Inband coding of secondary data
03/11/1987EP0213801A2 Radio receiver for carrying out self diagnosis without interference
03/10/1987US4649538 Radio paging device with improved test modes
03/04/1987EP0212030A1 Apparatus for detecting the end of the energy of a data signal
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