Patents
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Patents for H04B 17 - Monitoring; Testing (29,423)
05/1985
05/29/1985EP0142893A1 Arrangement for restoring the L.F. content of a digital signal
05/29/1985EP0142789A2 Radio relay method and apparatus for digital communication
05/28/1985CA1187944A1 Spectrum surveillance receiver system
05/21/1985CA1187587A1 Facility for monitoring the level of a radio- frequency signal
05/15/1985EP0141203A2 An anti-droop infra-red transmitter circuit
05/07/1985CA1186790A2 Test set for railway cab signal system
05/07/1985CA1186743A1 Method of detecting troubles in a receiver for a common control channel of a mobile radio telephone communication system and a system therefor
05/02/1985EP0138819A1 Status monitor
04/1985
04/30/1985CA1186378A1 Local orderwire facility for fiber optic communication system
04/24/1985EP0138613A2 Method and apparatus for monitoring suitability of a transmission path for transmission of digital data signals
03/1985
03/27/1985EP0135164A1 Transmission system for higher bit rate digital signals with auxiliary signal transmission
03/26/1985US4507568 Device for initiating the remote feed of electrical users
03/19/1985US4506332 Facility for monitoring the level of a radio-frequency signal
02/1985
02/28/1985WO1985000946A1 Maintenance response signalling arrangement for a digital transmission system
02/28/1985WO1985000945A1 Control signalling arrangement for a digital transmission system
02/20/1985EP0133278A2 Method and arrangement for monitoring digital radio links
02/20/1985EP0133261A2 Carrier relay system
02/19/1985US4501020 Spectrum surveillance receiver system
02/13/1985EP0037414B1 Method and apparatus for testing survival radios
02/12/1985US4499600 Supervision of transmission systems
02/12/1985CA1182527A1 Malfunction detection system for a mobile radio telephone system
02/05/1985US4498082 Method and apparatus for locating a discontinuity in a data transmission ring
02/05/1985CA1182177A1 Apparatus for testing microwave radios having a 35 mhz if using test equipment designed for 70 mhz if
02/05/1985CA1182176A1 Built-in linearity testing arrangement for an fm radio system
02/05/1985CA1182175A1 Built-in group delay testing arrangement for an fm radio system
01/1985
01/16/1985EP0131440A1 Variable frequency RF electronic surveillance system
01/08/1985US4492567 Method of removal of impure gases at the time of scrap preheating, and equipment for use of same
01/01/1985US4491973 Transmitter testing method
01/01/1985US4491968 For use in a coaxial cable network
12/1984
12/27/1984CA1180053A Circuit arrangement for protecting a control channel from jamming waves in a radio communication system
12/18/1984US4489360 Circuit for automatically closing a backup remote feed loop
11/1984
11/27/1984CA1178683A1 Orderwire communication system
11/06/1984CA1177587A1 Method and device for detecting data signals and signalling signals in a telephone channel
10/1984
10/31/1984EP0123132A2 Monitoring system for a digital transmission system
10/23/1984US4479253 Phaselock receiver with input signal measuring capability
10/23/1984US4479252 Device for reduction of the false alarm ratio and monitor receiver comprising such a device of this nature
10/17/1984EP0121666A1 Method and arrangement for monitoring repeaters
10/11/1984WO1984004010A1 Status monitor
10/11/1984EP0114890A4 Method and apparatus for measuring the strength of a radio frequency signal.
10/09/1984US4476561 Device for remotely supervising operation of a branched data-transmission network
10/09/1984US4476437 System for detecting abnormal condition of high frequency output signal in its power level
10/02/1984US4475121 Terminal unit checking system
09/1984
09/19/1984EP0118763A2 Method of searching fault locations in digital transmission line
09/11/1984US4471494 Optical transmission system for high frequency digital signals
09/11/1984US4471491 Service channel signal transmission system
09/11/1984CA1174318A1 Telecommunication fault detecting system
09/11/1984CA1174299A1 System for detecting abnormal condition of high frequency output signal in its power level
09/04/1984US4470148 Satellite-receiver time division multiple-access burst duration and guard space monitor
09/04/1984US4469916 Method and apparatus for detecting signalling and data signals on a telephone channel
08/1984
08/21/1984US4467192 Optical receiver
08/14/1984CA1172745A1 Polling pattern generator for catv system
08/08/1984EP0114890A1 Method and apparatus for measuring the strength of a radio frequency signal.
08/07/1984US4464791 All-level Rayleigh fader
08/01/1984EP0114463A2 Link quality analyser and method of link quality measurement
07/1984
07/24/1984CA1171543A1 Industrial control system
07/17/1984CA1171164A1 Polling pattern generator for catv system
07/05/1984WO1984002627A1 Secondary channel method and apparatus
07/04/1984EP0112716A2 Secondary channel method and apparatus
06/1984
06/27/1984EP0111973A2 Monitoring an existing radio link between a fixed and a mobile radio station
06/20/1984EP0111168A1 Circuit for fault localisation with an arrangement for the remote feeding of electricity consumers
06/19/1984US4455678 Test method and device for FM transmitter
06/19/1984US4455644 Telecommunication fault detecting system
06/12/1984CA1169133A1 Remote control systems for telecommunications links
05/1984
05/29/1984CA1168311A1 Digital transmission systems
05/15/1984US4449247 Local orderwire facility for fiber optic communication system
05/15/1984US4449246 Orderwire communication system
05/02/1984EP0106985A2 Operation monitoring of digital transmission links
04/1984
04/17/1984US4443661 Method of detecting troubles in a receiver for a common control channel of a mobile radio telephone communication system and a system therefor
04/17/1984CA1165917A1 Device for measuring the attenuation in a transmission path
04/17/1984CA1165908A1 Method and apparatus for measuring signal to noise ratio in a tdma communications system
04/04/1984EP0104748A1 RF Watt meter
03/1984
03/20/1984CA1164092A1 Apparatus for simulating interference transmissions
02/1984
02/16/1984WO1984000653A1 Method and apparatus for measuring the strength of a radio frequency signal
01/1984
01/31/1984CA1161544A1 Passive data monitor for use with polling pattern generator in catv system
01/10/1984US4425662 System for tele-locating regenerative repeaters
01/04/1984EP0097233A2 Circuit arrangement of putting into operation the remote power supply to electricity consumers
11/1983
11/29/1983US4418424 Cable television transmission control system
11/15/1983US4415770 Malfunction detection system for a mobile radio telephone system
11/15/1983CA1157133A1 Multitone frequency response and envelope delay distortion tests
10/1983
10/26/1983EP0092129A2 Optical connectors
10/26/1983EP0092071A2 Operating supervision for digital signal transmission links
10/25/1983US4412350 Method and apparatus for distinguishing between minimum and non-minimum phase fades
10/25/1983US4412348 Apparatus for testing linearity of an FM transmitter
10/18/1983US4410986 Error and status detection circuit for a digital regenerator using quantized feedback
10/18/1983US4410983 Distributed industrial control system with remote stations taking turns supervising communications link between the remote stations
10/11/1983CA1155224A1 Method of and device for effecting objective quality measures on speech transmission apparatuses
10/05/1983EP0090728A1 Process for transmitting a HDBN coded signal with an auxiliary binary signal, coder and decoder according to the process and remote repeater supervision of a digital link by such an auxiliary signal
10/05/1983EP0090402A2 Cicuit arrangement for automatically closing a remote power supply loop by way of substitution
10/05/1983EP0030724B1 Method and device for carrying out objective measurements on digital speech transmission systems
10/04/1983US4408322 Method and apparatus for measuring signal to noise ratio in a TDMA communications system
10/04/1983US4408179 Communications system for automotive vehicles
09/1983
09/28/1983EP0089871A1 Apparatus generating test signals for electronic equipment
09/27/1983US4406919 Method and apparatus for monitoring intermediate regenerative repeaters
09/13/1983US4404532 Modulator having improved bandwidth and power requirements
08/1983
08/30/1983US4402082 Automatic line termination in distributed industrial process control system
08/30/1983US4402075 Step-by-step remote locating system for repeaters in a PCM link
08/17/1983EP0085940A2 Service channel signal transmission system
07/1983
07/27/1983EP0084371A2 Carrier frequency system for four-wire operation
07/19/1983US4394760 Process for monitoring analog and digital mobile radio connections
07/12/1983US4393279 Digital data transmission system having frequency or phase modulated data carrying signals to provide supervisory channel
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