Matches 251 - 265 out of 265 < 1 2 3 4 5 6
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3959770 Method and apparatus for error compensation in multichannel systems  
Error compensating method and means are shown for use in multichannel systems for compensation of errors in the operating characteristics of the individual information handling channels. Offset,...
3956601 Telecommunications analyzer  
A telecommmunications analyzer for monitoring transmission line performance comprising a transmission line test means including a transmitter means to generate at least one predetermined...
3906174 Cable pair testing arrangement  
A pseudo-random, pseudo-ternary pulse train, which is representative of a PCM signal, is applied to one end of a cable pair. At the other end of the cable pair, the received pulse train is...
3869603 STORAGE UNIT TEST CONTROL DEVICE  
A device is disclosed for detecting faults in a storage unit of a program controlled data switching system comprising processing units and the storage unit, the device comprises a storage test...
3866217 MONITORING TRANSMISSION LINK BY COMPARING PSEUDORANDOM SIGNALS  
A monitoring remote location has alarm sensors and a data transmitter for transmitting alarm and pseudorandom number signals over a direct line to a data detector at the monitoring central...
3716834 DATA TRANSMISSION SYSTEM WITH IMMUNITY TO CIRCUIT FAULTS  
A system for use with a data transmission network having a central station and a plurality of remote stations connected in series by a low grade transmission line such as a telephone pair. The...
3689884 DIGITAL CORRELATOR FOR CALCULATING FIGURE OF MERIT OF COMMUNICATION TRANSMISSION SYSTEM  
A circuit for providing a measure of the fidelity of a communication transmission (figure of merit) by determining the correlation between a transmitted sequence of digital numbers with the same...
3596245 DATA LINK TEST METHOD AND APPARATUS  
A controllable shift register is used in testing circuitry which measures statistical error rates and synchronization loss rates on digital data links such as are used for transmission of...
3404338 Method and means for measuring and correcting delay and attenuation in a transmission channel  
3380023 Electronic alarm system  
3266017 Plural electrical paths monitored by comparison of transients  
3131376 Security-line-surveillance system  
3069498 Measuring circuit for digital transmission system  
2945915 Operational checkout of data handling equipment  
3562710 Title is not available  
Matches 251 - 265 out of 265 < 1 2 3 4 5 6