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Class Information
Number: 375/224
Name: Pulse or digital communications > Testing
Description: Subject matter in which at least part of the system is tested.

Sub-classes under this class:

Class Number Class Name Patents
375/225 Data rate 452
375/226 Phase error or phase jitter 553
375/227 Signal noise 545
375/228 With indicator 241

Patents under this class:

Patent Number Title Of Patent Date Issued
6269114 Monitor particularly suited for Naval Tactical Data System (NTDS) interfaces types A and B Jul. 31, 2001
6259314 Built-in self test for a satellite demodulator Jul. 10, 2001
6240130 Method and apparatus to measure jitter. May. 29, 2001
6222876 Detecting valid data patterns for adapting equalization gain and offset for data transmissions Apr. 24, 2001
6222877 Method for performance monitoring of data transparent communication links Apr. 24, 2001
6216095 Automated in situ testing of railroad telemetry radios Apr. 10, 2001
6212229 Adaptive pre-emphasis technique Apr. 3, 2001
6201829 Serial/parallel GHZ transceiver with pseudo-random built in self test pattern generator Mar. 13, 2001
6201953 Method and apparatus for on-board testing of a communication satellite Mar. 13, 2001
6185419 Communications system and method for testing of a communications apparatus Feb. 6, 2001
6181738 Reverse link power control using a frame quality metric Jan. 30, 2001
6169760 Fast, highly accurate frequency measurement technique Jan. 2, 2001
6169763 Characterizing a communication system using frame aligned test signals Jan. 2, 2001
6166594 Self calibrating demodulator system Dec. 26, 2000
6163861 Error compensating method and apparatus and medium storing an error compensation program Dec. 19, 2000
6137830 Measuring bit error rate performance of a receiver by the receiver and conveying measurement acoustically Oct. 24, 2000
6134267 Detection method for the transmitter identification information signal in the null symbol of a DAB stream Oct. 17, 2000
6122313 Self-contained self-testing data modulator Sep. 19, 2000
6118479 Optical transmission method, error rate evaluation method applied in optical transmission and apparatus for generating a signal for error rate evaluation Sep. 12, 2000
6115416 Pulse code sequence analyzer Sep. 5, 2000
6104983 Method and apparatus for measuring waveform quality of CDMA signal Aug. 15, 2000
6100771 Multi-signal generator Aug. 8, 2000
6101218 Leakage power measurement apparatus and method Aug. 8, 2000
6097755 Time domain reflectometer having optimal interrogating pulses Aug. 1, 2000
6081550 Method of testing clock paths and network elements for carrying out the method Jun. 27, 2000
6075452 Field apparatus and field bus system and method of controlling field apparatus Jun. 13, 2000
6064694 Frequency translating device transmission response system May. 16, 2000
6061393 Non-invasive digital cable test system May. 9, 2000
6041076 Digitally modulated CATV power measurement using undersampling Mar. 21, 2000
6041077 Frequency translating device transmission response method Mar. 21, 2000
6038253 Data receiver with symbol rate discrimination and statistical analysis functions Mar. 14, 2000
6031869 Use of multiple sample frequencies to resolve ambiguities in band-folded digital receivers Feb. 29, 2000
6021159 Circuit for measuring transmission quality of demodulated digital signal transmitted under carrier modulation transmission system Feb. 1, 2000
6021385 System for detecting defective speech frames in a receiver by calculating the transmission quality of an included signal within a GSM communication system Feb. 1, 2000
6005891 System for testing signal transmission/reception apparatus Dec. 21, 1999
6002714 Data, path and flow integrity monitor Dec. 14, 1999
5999566 Method and apparatus for providing error-tolerant communication of information Dec. 7, 1999
6000052 Signal conditioning system for controlling data retrieval channel characteristics in which errors in samples are segregated by association with intended sample values to control selected c Dec. 7, 1999
5995541 Method and apparatus for self-calibration and testing of ZPSK transmitter/receiver IC's Nov. 30, 1999
5991338 Pinpointing interruptions Nov. 23, 1999
5987060 System and method of radio communications with an up-down digital signal link Nov. 16, 1999
5982815 Circuit for setting a device into a test mode by changing a first port to a fixed clock and a second port to a non-fixed clock Nov. 9, 1999
5983287 Communication terminal having a state machine for automatically starting subsequent control in response to a lock detection signal provided by a PLL (phase lock loop) Nov. 9, 1999
5974031 Automatic detection of a telecommunications fractional channel configuration Oct. 26, 1999
5970075 Method and apparatus for generating an error location polynomial table Oct. 19, 1999
5966405 Frequency deviation measuring device Oct. 12, 1999
5963589 Digital signal modulation analysis device Oct. 5, 1999
5953372 Loopback transmission testing in a communications device Sep. 14, 1999
5937004 Apparatus and method for verifying performance of digital processing board of an RF receiver Aug. 10, 1999
5937005 Error rate measurement apparatus for a mobile radio communications system Aug. 10, 1999

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