Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 17 - Monitoring; Testing
Patents for H04B 17 - Monitoring; Testing (29,423)
03/1987
03/03/1987US4648127 Noise detector
03/03/1987US4648126 Noise detector
03/03/1987US4648124 Apparatus for locating passive intermodulation interference sources
02/1987
02/17/1987US4644537 Inband coding of secondary data
02/10/1987US4642426 Apparatus for locating faults in a carrier subscriber communication system
02/10/1987CA1217821A Paging receiver having a plurality of test modes
02/10/1987CA1217820A Low power indicating circuit for a radio transmitter
01/1987
01/28/1987EP0210007A1 Distortion surveillance apparatus
01/14/1987EP0208327A1 Digital subscriber connection
01/06/1987US4635298 Interference wave detection circuit for use in radio receiver
01/06/1987US4635260 Data transmission telemonitoring equipment and system
01/06/1987US4635247 High-speed burst signal monitoring device
12/1986
12/30/1986US4633464 Control signalling arrangement for a digital transmission system
12/30/1986US4633459 Repeater for carrier subscriber communication system
12/30/1986US4633411 For measuring the quality of communications links
12/30/1986US4633186 Digital signal pattern recognition circuit
12/16/1986US4630268 Communication circuit loopback test apparatus
12/10/1986EP0204248A1 Digital transmission link with series-connected telemetry channels
12/09/1986US4628309 System and device for remote surveillance of equipment on a digital transmission link without interrupting traffic
12/03/1986EP0203757A2 Digital transmission system using an auxiliary low-frequency channel
12/02/1986US4627077 Modified QAM data point constellation for secondary channel signalling
12/02/1986CA1214828A1 Paging receivers
11/1986
11/12/1986EP0200836A2 Channelized fiber optic receiver
11/04/1986CA1213649A1 Secondary channel method and apparatus
10/1986
10/29/1986EP0199326A2 Operation monitoring of digital transmission links
10/29/1986EP0199294A1 Method and device for signalling over a bidirectional digital transmission link
10/28/1986US4620257 Carrier relay system
10/23/1986WO1986006230A1 Apparatus for analysing two-channel transmission/reflection characteristics
10/22/1986EP0198548A2 Method and circuit arrangement for measuring the quality of radiotransmission channels in a radiotransmission system
10/15/1986EP0197663A2 Methods of and apparatus for controlling a bimorph distortion detection device
10/07/1986US4616108 Domestic satellite communication system
09/1986
09/10/1986EP0193835A1 Apparatus for collecting monitoring information in transmission systems
09/09/1986US4611324 Method of controlling a supervisory arrangement in a digital transmission system
08/1986
08/19/1986US4607376 Digital radio relay system
08/12/1986US4606019 Receive data processing device for TDMA satellite communications network
08/12/1986CA1209706A1 Transmitting a digital signal and an additional signal
08/05/1986US4604745 Method of searching fault locations in digital transmission line
08/05/1986CA1209210A1 Method and apparatus for measuring the strength of a radio signal frequency
07/1986
07/29/1986US4603325 For evaluating installation of a wireless alarm system
07/15/1986CA1207839A1 Status monitor
07/08/1986CA1207388A1 Test-signal generating device for testing electronic equipment
06/1986
06/11/1986EP0184210A1 Data transmission arrangement
06/11/1986EP0184109A1 Method and arrangement for signalling over a digital transmission link
06/11/1986EP0184108A1 Method and arrangement for signalling over a digital transmission link by substituting messages by transmitted data
06/11/1986EP0184107A1 Method for signalling over a digital transmission link and arrangement for carrying out the method
06/05/1986WO1986003357A1 Method and apparatus for looping around a digital transmission line at a channel unit
06/03/1986CA1205561A1 Method of searching fault locations in digital transmission line
05/1986
05/21/1986EP0181701A1 Carrier to noise ratio measurement circuit
04/1986
04/29/1986US4586186 Maintenance response signalling arrangement for a digital transmission system
04/15/1986US4582964 Remote loop-around carrier test system
04/08/1986US4581639 Method and apparatus for monitoring suitability of a transmission path for transmission of digital data signals
04/02/1986EP0176015A1 Method for transmitting supplementary information over a digital auxiliary channel and utilisation of the method
04/01/1986US4580274 Transceiver test device
04/01/1986CA1202680A1 Rf wattmeter
03/1986
03/25/1986US4578820 Received signal strength indicator
03/19/1986EP0174540A2 Satetellite-based position determination and message transfer system with monitoring of link quality
03/11/1986CA1201769A1 Fault location arrangement for digital optical transmission system
02/1986
02/26/1986EP0172590A1 Noise detector
02/05/1986EP0170321A1 Noise detector
01/1986
01/15/1986EP0167531A1 Packetized ensemble modem.
01/14/1986US4564933 Supervision of digital transmission systems
01/14/1986CA1199395A1 Electronic instrument with multiple interchangeable operating modes
01/08/1986EP0166839A1 Method and device for measuring phase-jitter of a transmission canal
01/02/1986EP0166504A2 Transmitting a digital signal and an additional signal
12/1985
12/31/1985US4562401 Circuit arrangement and method for fault locating in conjunction with equipment for the trunk feeding of electrical loads
12/11/1985EP0163994A2 Receive data processing device for TDMA satellite communications network
12/05/1985WO1985005518A1 Characterisation of digital radio signals
12/03/1985CA1197622A1 Link quality analyzer
11/1985
11/21/1985EP0161900A2 Loopback of a PCM signal
11/21/1985EP0161669A2 State information communication in a TDMA satellite communication network with high frame availability
11/19/1985US4554410 System for maintenance and diagnosis of mobile telephone equipment
11/13/1985EP0160993A2 Radio-system
11/13/1985EP0160748A1 Error code insertion for alphabet code converters
11/12/1985US4553268 Circuit arrangement with a laser diode for transmission of communication signals through a light waveguide
11/06/1985EP0160247A2 Supervising and controlling system for a communication station in a TDMA communication system
10/1985
10/29/1985US4550403 Method for transmitting a HDBn code signal with an auxiliary binary signal in a digital transmission line and system for monitoring repeaters in the line by means of auxiliary signals
10/23/1985EP0159154A1 Test equipment for simulating multipath interference
10/15/1985US4547728 RF Wattmeter
10/09/1985EP0157084A1 Test method for a microcomputer controlled electronic apparatus
10/02/1985EP0156753A1 Noise analyzer for digital signal transmisson cables
10/02/1985EP0156315A2 Circuit for testing the correct operation of a data transmission system
10/01/1985CA1194547A1 Electronic instrument for measuring the overall phase and amplitude distortion of a transmission channel
09/1985
09/24/1985CA1194174A1 System for tele-locating regenerative repeaters
09/11/1985EP0154264A2 High-speed burst signal monitoring device
09/03/1985US4539683 Method for checking test specimens
08/1985
08/28/1985EP0152423A1 Maintenance response signalling arrangement for a digital transmission system.
08/27/1985US4538268 Test-signal generating device for testing electronic equipment
08/21/1985EP0151704A1 High power transmitter with automatic controlling and monitoring
08/21/1985EP0151616A1 Control signalling arrangement for a digital transmission system.
08/07/1985EP0150410A1 Vector network analyzer
08/06/1985US4534064 Fault location arrangement for digital optical transmission system
08/06/1985US4533868 Electronic instrument for measuring the overall phase and amplitude distortion of a transmission channel
07/1985
07/24/1985EP0149284A1 Method for locating faults
07/23/1985US4531117 Variable frequency RF electronic surveillance system
07/18/1985WO1985003180A1 Packetized ensemble modem
07/10/1985EP0148016A2 Interference wave detection circuit for use in radio receiver
06/1985
06/26/1985EP0145983A2 Digital radio relay equipment and method
06/25/1985CA1189571A1 Service channel signal transmission system
06/05/1985EP0143489A1 Supervisory arrangement for a digital transmission system
06/04/1985US4521912 Low power indicating circuit for a radio transmitter
1 ... 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295