| Patents for H04B 17 - Monitoring; Testing (29,423) |
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| 02/03/1981 | US4249036 Remote alarm installation |
| 01/13/1981 | US4245352 Automated system for testing radio receivers |
| 01/13/1981 | US4245320 Method and device for measuring the slope of the envelope delay characteristic of a transmission channel and their application to an automatic equalizer selection technique |
| 01/06/1981 | US4244054 Method and apparatus for measuring the amplitude and the group delay for each side-band of an amplitude modulated transmitter |
| 12/30/1980 | US4242750 Process for testing a data transmission system employing a test loop |
| 12/23/1980 | US4241445 Method and apparatus for counting transmission errors in a digital microwave link |
| 11/25/1980 | CA1090425A1 Digital radio relay systems |
| 11/18/1980 | US4234964 Radio receiver monitoring and testing apparatus |
| 11/12/1980 | EP0018517A1 Diagnostic and alarm apparatus for a data communication network |
| 11/04/1980 | US4232398 Radio receiver alignment indicator |
| 10/29/1980 | EP0018295A2 Monitoring system for telecommunication links equipped with repeater regenerators |
| 10/21/1980 | CA1088234A1 Test circuit for a protective coupler |
| 10/07/1980 | US4227255 Signal classifier |
| 10/01/1980 | EP0016416A1 Address-free fault localisation |
| 09/30/1980 | US4225969 Method and apparatus for testing a frequency synthesizer in an RF modem |
| 09/02/1980 | US4220833 Location of a faulty pulse form restorer in a cable system |
| 08/26/1980 | CA1084590A1 Selective intermodulation distortion measurement |
| 08/20/1980 | EP0014370A1 Method for locating troubles on a communication line without using addresses |
| 08/20/1980 | EP0014244A1 Method and device for testing a frequency synthesizer in a HF modem |
| 08/06/1980 | EP0013944A1 Method and arrangement for error location in, and the monitoring of, a communication link |
| 08/05/1980 | US4216429 Method and apparatus for quantitatively measuring the reception quality of a received frequency-modulated ultrashort-wave signal |
| 08/05/1980 | CA1083222A1 Fault location system for a repeatered pcm transmission system |
| 07/29/1980 | CA1082775A1 Radio receiver monitoring and testing apparatus |
| 07/22/1980 | US4214206 Digital transmission system having direct bit extraction from scrambled bit streams |
| 07/15/1980 | US4213016 Arrangement for measuring the line condition of a subscriber's line circuit by means of a measuring resistor |
| 07/09/1980 | EP0012977A1 Circuit for detecting and locating faults in a transmission system for pulse code modulated signals |
| 07/08/1980 | US4211920 Fault location system for optical repeating paths |
| 06/25/1980 | EP0012515A1 Instrument for testing susceptibility of PCM regenerators to noise |
| 06/10/1980 | US4207521 System using carrier burst sequences for detecting interference signals occurring across channels of a radio link including a repeater |
| 06/10/1980 | US4207431 Apparatus and method for monitoring a communications system |
| 05/20/1980 | US4204228 Digital testing apparatus |
| 05/14/1980 | EP0010552A1 Method and circuit for measuring the reception quality of a frequency modulated very high frequency signal |
| 05/13/1980 | US4203066 Access module |
| 05/06/1980 | US4201944 Receiver having a measurement instrument which is used as a tuning scale |
| 04/30/1980 | EP0010109A1 Method and arrangement for indicating the reception quality of a frequency modulated very high frequency signal |
| 04/22/1980 | CA1076211A1 Receiver selecting (voting) system |
| 04/15/1980 | US4198600 Demodulating system for auxiliary channel in straight-through radio frequency repeater |
| 03/18/1980 | US4194092 Device for detecting a frequency in a PCM coded signal |
| 03/18/1980 | CA1073820A1 System for reducing noise transients in recorded sound signals |
| 03/04/1980 | CA1073053A1 Repeater monitoring and fault location |
| 02/05/1980 | US4187415 Remote locating system for transmission faults in data transmission line having regenerative repeaters |
| 01/22/1980 | US4185248 Input level supervisory system for level regulator |
| 01/22/1980 | US4185242 Signal-to-noise ratio measurement of intermittent signals |
| 01/15/1980 | US4184056 Fault locating system for optical telecommunications |
| 12/18/1979 | CA1068408A1 Circuit and method for digitally measuring signal levels, of pcm encoded signals |
| 10/23/1979 | CA1065015A1 Instruments and methods for measuring characteristics of only a selected portion of a transmission channel |
| 10/16/1979 | CA1064579A1 Channel evaluation apparatus for point-to-point communications systems |
| 08/28/1979 | CA1061409A1 Method and apparatus for testing transmission lines |
| 08/22/1979 | EP0003634A1 Method of aligning a radio receiver and means for indicating the alignment of a radio receiver |
| 07/25/1979 | EP0003203A1 Method and arrangement for measuring distortions caused by the transmission medium in wideband digital radio links |
| 07/17/1979 | US4161635 Address verification system |
| 07/17/1979 | US4161634 Count-down addressing system |
| 07/03/1979 | US4160211 Method and instrument for measuring the sensitivity of a radio receiver |
| 06/26/1979 | US4159470 Data communications systems employing redundant series transmission loops |
| 06/19/1979 | CA1056917A1 Loop current detector |
| 06/13/1979 | EP0002415A1 Method and device for counting transmission errors in a digital radio relay link |
| 06/13/1979 | EP0002266A1 A digital patch and access assembly comprising at least one digital patch and access module and a monitoring plug |
| 06/12/1979 | US4158180 Temperature control circuit |
| 06/12/1979 | CA1056312A1 Method and apparatus for recording transient events |
| 05/15/1979 | US4155041 System for reducing noise transients |
| 04/10/1979 | US4149122 Wideband tracking generator for harmonic mixing receivers |
| 03/27/1979 | US4146839 Channel traffic monitoring radio transceiver |
| 03/20/1979 | CA1051094A1 Signal quality detector |
| 03/13/1979 | US4144486 Apparatus for testing metal detectors |
| 03/06/1979 | US4143323 Radio receiver monitoring and testing apparatus |
| 02/20/1979 | US4140972 System for synchronizing synthesizers of communication systems |
| 12/19/1978 | CA1044828A1 Method and apparatus for remote control monitoring and localizing of pulse repeater-regenerators |
| 11/14/1978 | US4125809 Digital C/kT meter |
| 11/07/1978 | US4124818 Arrangement for monitoring signal-to-interference ratio in a radio transmission system |
| 10/24/1978 | US4122400 Amplifier protection circuit |
| 10/24/1978 | US4122358 Supervisory system for a data transmission system |
| 10/10/1978 | US4119964 Systems and methods for determining radio frequency interference |
| 09/26/1978 | CA1039379A1 Apparatus for monitoring a redundant multi-channel analog system |
| 09/05/1978 | US4112414 Host-controlled fault diagnosis in a data communication system |
| 09/05/1978 | US4112263 Modified duobinary regenerative repeater testing arrangement |
| 08/29/1978 | US4110572 Method and apparatus for testing transmission lines |
| 08/29/1978 | CA1037383A1 Method and means for interrogation of digital repeatered lines |
| 08/15/1978 | CA1036705A1 D.c. signal receiving circuit arrangements |
| 08/08/1978 | US4105958 Large delay spread channel simulator |
| 07/18/1978 | US4101743 Test circuit for a protective coupler |
| 06/20/1978 | US4096441 Test instrument for transmitters |
| 06/06/1978 | US4093918 Means for determining the refractive index profile of the atmosphere |
| 03/14/1978 | US4079381 Null steering apparatus for a multiple antenna array on an AM receiver |
| 03/14/1978 | US4079371 Rate converter for digital signals having a negative feedback phase lock loop |
| 03/07/1978 | US4078255 Sequence generator having amplitudes and phases of spectral components randomly distributed |
| 02/28/1978 | US4077004 Fault location system for a repeatered PCM transmission system |
| 02/07/1978 | US4072900 CB Radio accessory unit |
| 01/17/1978 | US4069402 Remote-testing arrangement for PCM transmission system |
| 11/29/1977 | US4060767 Self test circuit for multichannel radio receivers |
| 08/09/1977 | US4041395 Transmitter performance monitor and antenna matching system |
| 07/05/1977 | US4034299 Audio signal quality indicator |
| 06/07/1977 | US4028622 Selective intermodulation distortion measurement |
| 05/24/1977 | US4025854 In-service technique for measuring transmission characteristics of a microwave radio link |
| 05/24/1977 | US4025737 Repeater monitoring and fault location |
| 05/03/1977 | US4021625 Instruments and methods for measuring characteristics of only a selected portion of a transmission channel |
| 04/05/1977 | US4016552 Dual polarity pulse detection circuit with variable voltage threshold |
| 03/22/1977 | US4013962 Improved receiver selecting (voting) system |
| 03/08/1977 | US4011512 Electrical component failure detection apparatus |
| 02/22/1977 | US4009345 External management of satellite linked exchange network |
| 02/08/1977 | US4007423 System and apparatus for electronic spectral analysis |